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main_repo / deps / mdb_v8 / mdb_v8.c @ e851fef6
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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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/*
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* mdb(1M) module for debugging the V8 JavaScript engine. This implementation
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* makes heavy use of metadata defined in the V8 binary for inspecting in-memory
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* structures. Canned configurations can be manually loaded for V8 binaries
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* that predate this metadata. See mdb_v8_cfg.c for details.
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*/
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/*
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* We hard-code our MDB_API_VERSION to be 3 to allow this module to be
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* compiled on systems with higher version numbers, but still allow the
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* resulting binary object to be used on older systems. (We do not make use
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* of functionality present in versions later than 3.) This is particularly
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* important for mdb_v8 because (1) it's used in particular to debug
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* application-level software and (2) it has a history of rapid evolution.
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*/
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#define MDB_API_VERSION 3 |
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#include <sys/mdb_modapi.h> |
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#include <assert.h> |
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#include <ctype.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <libproc.h> |
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#include <sys/avl.h> |
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#include <alloca.h> |
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#include "v8dbg.h" |
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#include "v8cfg.h" |
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|
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#define offsetof(s, m) ((size_t)(&(((s *)0)->m))) |
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/*
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* The "v8_class" and "v8_field" structures describe the C++ classes used to
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* represent V8 heap objects.
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*/
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typedef struct v8_class { |
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struct v8_class *v8c_next; /* list linkage */ |
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struct v8_class *v8c_parent; /* parent class (inheritance) */ |
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struct v8_field *v8c_fields; /* array of class fields */ |
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size_t v8c_start; /* offset of first class field */
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size_t v8c_end; /* offset of first subclass field */
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char v8c_name[64]; /* heap object class name */ |
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} v8_class_t; |
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|
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typedef struct v8_field { |
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struct v8_field *v8f_next; /* list linkage */ |
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ssize_t v8f_offset; /* field offset */
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char v8f_name[64]; /* field name */ |
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boolean_t v8f_isbyte; /* 1-byte int field */
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boolean_t v8f_isstr; /* NUL-terminated string */
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} v8_field_t; |
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|
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/*
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* Similarly, the "v8_enum" structure describes an enum from V8.
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*/
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typedef struct { |
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char v8e_name[64]; |
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uint_t v8e_value; |
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} v8_enum_t; |
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|
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/*
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* During configuration, the dmod updates these globals with the actual set of
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* classes, types, and frame types based on the debug metadata.
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*/
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static v8_class_t *v8_classes;
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|
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static v8_enum_t v8_types[128]; |
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static int v8_next_type; |
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static v8_enum_t v8_frametypes[16]; |
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static int v8_next_frametype; |
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static int v8_silent; |
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/*
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* The following constants describe offsets from the frame pointer that are used
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* to inspect each stack frame. They're initialized from the debug metadata.
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*/
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static ssize_t V8_OFF_FP_CONTEXT;
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static ssize_t V8_OFF_FP_MARKER;
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static ssize_t V8_OFF_FP_FUNCTION;
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static ssize_t V8_OFF_FP_ARGS;
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/*
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* The following constants are used by macros defined in heap-dbg-common.h to
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* examine the types of various V8 heap objects. In general, the macros should
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* be preferred to using the constants directly. The values of these constants
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* are initialized from the debug metadata.
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*/
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static intptr_t V8_FirstNonstringType;
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static intptr_t V8_IsNotStringMask;
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static intptr_t V8_StringTag;
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static intptr_t V8_NotStringTag;
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static intptr_t V8_StringEncodingMask;
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static intptr_t V8_TwoByteStringTag;
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static intptr_t V8_AsciiStringTag;
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static intptr_t V8_StringRepresentationMask;
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static intptr_t V8_SeqStringTag;
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static intptr_t V8_ConsStringTag;
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static intptr_t V8_ExternalStringTag;
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static intptr_t V8_FailureTag;
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static intptr_t V8_FailureTagMask;
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static intptr_t V8_HeapObjectTag;
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static intptr_t V8_HeapObjectTagMask;
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static intptr_t V8_SmiTag;
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static intptr_t V8_SmiTagMask;
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static intptr_t V8_SmiValueShift;
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static intptr_t V8_SmiShiftSize;
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static intptr_t V8_PointerSizeLog2;
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static intptr_t V8_ISSHARED_SHIFT;
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static intptr_t V8_DICT_SHIFT;
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static intptr_t V8_DICT_PREFIX_SIZE;
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static intptr_t V8_DICT_ENTRY_SIZE;
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static intptr_t V8_DICT_START_INDEX;
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static intptr_t V8_PROP_IDX_CONTENT;
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static intptr_t V8_PROP_IDX_FIRST;
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static intptr_t V8_PROP_TYPE_FIELD;
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static intptr_t V8_PROP_FIRST_PHANTOM;
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static intptr_t V8_PROP_TYPE_MASK;
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static intptr_t V8_PROP_DESC_KEY;
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static intptr_t V8_PROP_DESC_DETAILS;
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static intptr_t V8_PROP_DESC_VALUE;
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static intptr_t V8_PROP_DESC_SIZE;
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static intptr_t V8_TRANSITIONS_IDX_DESC;
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static intptr_t V8_TYPE_JSOBJECT = -1; |
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static intptr_t V8_TYPE_JSARRAY = -1; |
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static intptr_t V8_TYPE_FIXEDARRAY = -1; |
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/*
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* Although we have this information in v8_classes, the following offsets are
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* defined explicitly because they're used directly in code below.
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*/
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static ssize_t V8_OFF_CODE_INSTRUCTION_SIZE;
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static ssize_t V8_OFF_CODE_INSTRUCTION_START;
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static ssize_t V8_OFF_CONSSTRING_FIRST;
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static ssize_t V8_OFF_CONSSTRING_SECOND;
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static ssize_t V8_OFF_EXTERNALSTRING_RESOURCE;
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static ssize_t V8_OFF_FIXEDARRAY_DATA;
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static ssize_t V8_OFF_FIXEDARRAY_LENGTH;
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static ssize_t V8_OFF_HEAPNUMBER_VALUE;
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static ssize_t V8_OFF_HEAPOBJECT_MAP;
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static ssize_t V8_OFF_JSARRAY_LENGTH;
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static ssize_t V8_OFF_JSDATE_VALUE;
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static ssize_t V8_OFF_JSFUNCTION_SHARED;
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static ssize_t V8_OFF_JSOBJECT_ELEMENTS;
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static ssize_t V8_OFF_JSOBJECT_PROPERTIES;
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static ssize_t V8_OFF_MAP_CONSTRUCTOR;
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static ssize_t V8_OFF_MAP_INOBJECT_PROPERTIES;
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static ssize_t V8_OFF_MAP_INSTANCE_ATTRIBUTES;
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static ssize_t V8_OFF_MAP_INSTANCE_DESCRIPTORS;
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static ssize_t V8_OFF_MAP_INSTANCE_SIZE;
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static ssize_t V8_OFF_MAP_BIT_FIELD3;
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static ssize_t V8_OFF_MAP_TRANSITIONS;
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static ssize_t V8_OFF_ODDBALL_TO_STRING;
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static ssize_t V8_OFF_SCRIPT_LINE_ENDS;
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static ssize_t V8_OFF_SCRIPT_NAME;
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static ssize_t V8_OFF_SEQASCIISTR_CHARS;
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static ssize_t V8_OFF_SEQONEBYTESTR_CHARS;
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static ssize_t V8_OFF_SHAREDFUNCTIONINFO_CODE;
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static ssize_t V8_OFF_SHAREDFUNCTIONINFO_FUNCTION_TOKEN_POSITION;
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static ssize_t V8_OFF_SHAREDFUNCTIONINFO_INFERRED_NAME;
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static ssize_t V8_OFF_SHAREDFUNCTIONINFO_LENGTH;
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static ssize_t V8_OFF_SHAREDFUNCTIONINFO_SCRIPT;
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static ssize_t V8_OFF_SHAREDFUNCTIONINFO_NAME;
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static ssize_t V8_OFF_STRING_LENGTH;
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#define NODE_OFF_EXTSTR_DATA 0x4 /* see node_string.h */ |
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#define V8_CONSTANT_OPTIONAL 1 |
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#define V8_CONSTANT_HASFALLBACK 2 |
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#define V8_CONSTANT_MAJORSHIFT 3 |
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#define V8_CONSTANT_MAJORMASK ((1 << 4) - 1) |
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#define V8_CONSTANT_MAJOR(flags) \
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(((flags) >> V8_CONSTANT_MAJORSHIFT) & V8_CONSTANT_MAJORMASK) |
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#define V8_CONSTANT_MINORSHIFT 7 |
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#define V8_CONSTANT_MINORMASK ((1 << 9) - 1) |
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#define V8_CONSTANT_MINOR(flags) \
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(((flags) >> V8_CONSTANT_MINORSHIFT) & V8_CONSTANT_MINORMASK) |
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#define V8_CONSTANT_FALLBACK(maj, min) \
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(V8_CONSTANT_OPTIONAL | V8_CONSTANT_HASFALLBACK | \ |
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((maj) << V8_CONSTANT_MAJORSHIFT) | ((min) << V8_CONSTANT_MINORSHIFT)) |
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/*
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* Table of constants used directly by this file.
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*/
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typedef struct v8_constant { |
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intptr_t *v8c_valp; |
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const char *v8c_symbol; |
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uint32_t v8c_flags; |
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intptr_t v8c_fallback; |
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} v8_constant_t; |
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static v8_constant_t v8_constants[] = {
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{ &V8_OFF_FP_CONTEXT, "v8dbg_off_fp_context" },
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{ &V8_OFF_FP_FUNCTION, "v8dbg_off_fp_function" },
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{ &V8_OFF_FP_MARKER, "v8dbg_off_fp_marker" },
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{ &V8_OFF_FP_ARGS, "v8dbg_off_fp_args" },
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{ &V8_FirstNonstringType, "v8dbg_FirstNonstringType" },
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{ &V8_IsNotStringMask, "v8dbg_IsNotStringMask" },
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{ &V8_StringTag, "v8dbg_StringTag" },
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{ &V8_NotStringTag, "v8dbg_NotStringTag" },
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{ &V8_StringEncodingMask, "v8dbg_StringEncodingMask" },
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{ &V8_TwoByteStringTag, "v8dbg_TwoByteStringTag" },
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{ &V8_AsciiStringTag, "v8dbg_AsciiStringTag" },
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{ &V8_StringRepresentationMask, "v8dbg_StringRepresentationMask" },
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{ &V8_SeqStringTag, "v8dbg_SeqStringTag" },
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{ &V8_ConsStringTag, "v8dbg_ConsStringTag" },
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{ &V8_ExternalStringTag, "v8dbg_ExternalStringTag" },
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{ &V8_FailureTag, "v8dbg_FailureTag" },
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{ &V8_FailureTagMask, "v8dbg_FailureTagMask" },
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{ &V8_HeapObjectTag, "v8dbg_HeapObjectTag" },
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{ &V8_HeapObjectTagMask, "v8dbg_HeapObjectTagMask" },
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{ &V8_SmiTag, "v8dbg_SmiTag" },
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{ &V8_SmiTagMask, "v8dbg_SmiTagMask" },
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{ &V8_SmiValueShift, "v8dbg_SmiValueShift" },
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{ &V8_SmiShiftSize, "v8dbg_SmiShiftSize",
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#ifdef _LP64
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V8_CONSTANT_FALLBACK(0, 0), 31 }, |
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#else
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V8_CONSTANT_FALLBACK(0, 0), 0 }, |
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#endif
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{ &V8_PointerSizeLog2, "v8dbg_PointerSizeLog2" },
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{ &V8_DICT_SHIFT, "v8dbg_dict_shift",
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V8_CONSTANT_FALLBACK(3, 13), 24 }, |
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{ &V8_DICT_PREFIX_SIZE, "v8dbg_dict_prefix_size",
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V8_CONSTANT_FALLBACK(3, 11), 2 }, |
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{ &V8_DICT_ENTRY_SIZE, "v8dbg_dict_entry_size",
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V8_CONSTANT_FALLBACK(3, 11), 3 }, |
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{ &V8_DICT_START_INDEX, "v8dbg_dict_start_index",
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V8_CONSTANT_FALLBACK(3, 11), 3 }, |
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{ &V8_ISSHARED_SHIFT, "v8dbg_isshared_shift",
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V8_CONSTANT_FALLBACK(3, 11), 0 }, |
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{ &V8_PROP_IDX_FIRST, "v8dbg_prop_idx_first" },
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{ &V8_PROP_TYPE_FIELD, "v8dbg_prop_type_field" },
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{ &V8_PROP_FIRST_PHANTOM, "v8dbg_prop_type_first_phantom" },
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{ &V8_PROP_TYPE_MASK, "v8dbg_prop_type_mask" },
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{ &V8_PROP_IDX_CONTENT, "v8dbg_prop_idx_content",
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V8_CONSTANT_OPTIONAL }, |
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{ &V8_PROP_DESC_KEY, "v8dbg_prop_desc_key",
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V8_CONSTANT_FALLBACK(0, 0), 0 }, |
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{ &V8_PROP_DESC_DETAILS, "v8dbg_prop_desc_details",
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V8_CONSTANT_FALLBACK(0, 0), 1 }, |
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{ &V8_PROP_DESC_VALUE, "v8dbg_prop_desc_value",
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V8_CONSTANT_FALLBACK(0, 0), 2 }, |
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{ &V8_PROP_DESC_SIZE, "v8dbg_prop_desc_size",
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V8_CONSTANT_FALLBACK(0, 0), 3 }, |
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{ &V8_TRANSITIONS_IDX_DESC, "v8dbg_transitions_idx_descriptors",
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V8_CONSTANT_OPTIONAL }, |
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}; |
| 279 |
|
| 280 |
static int v8_nconstants = sizeof (v8_constants) / sizeof (v8_constants[0]); |
| 281 |
|
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typedef struct v8_offset { |
| 283 |
ssize_t *v8o_valp; |
| 284 |
const char *v8o_class; |
| 285 |
const char *v8o_member; |
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boolean_t v8o_optional; |
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} v8_offset_t; |
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|
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static v8_offset_t v8_offsets[] = {
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{ &V8_OFF_CODE_INSTRUCTION_SIZE,
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"Code", "instruction_size" }, |
| 292 |
{ &V8_OFF_CODE_INSTRUCTION_START,
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"Code", "instruction_start" }, |
| 294 |
{ &V8_OFF_CONSSTRING_FIRST,
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"ConsString", "first" }, |
| 296 |
{ &V8_OFF_CONSSTRING_SECOND,
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"ConsString", "second" }, |
| 298 |
{ &V8_OFF_EXTERNALSTRING_RESOURCE,
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| 299 |
"ExternalString", "resource" }, |
| 300 |
{ &V8_OFF_FIXEDARRAY_DATA,
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"FixedArray", "data" }, |
| 302 |
{ &V8_OFF_FIXEDARRAY_LENGTH,
|
| 303 |
"FixedArray", "length" }, |
| 304 |
{ &V8_OFF_HEAPNUMBER_VALUE,
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"HeapNumber", "value" }, |
| 306 |
{ &V8_OFF_HEAPOBJECT_MAP,
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| 307 |
"HeapObject", "map" }, |
| 308 |
{ &V8_OFF_JSARRAY_LENGTH,
|
| 309 |
"JSArray", "length" }, |
| 310 |
{ &V8_OFF_JSDATE_VALUE,
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| 311 |
"JSDate", "value", B_TRUE }, |
| 312 |
{ &V8_OFF_JSFUNCTION_SHARED,
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| 313 |
"JSFunction", "shared" }, |
| 314 |
{ &V8_OFF_JSOBJECT_ELEMENTS,
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| 315 |
"JSObject", "elements" }, |
| 316 |
{ &V8_OFF_JSOBJECT_PROPERTIES,
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| 317 |
"JSObject", "properties" }, |
| 318 |
{ &V8_OFF_MAP_CONSTRUCTOR,
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| 319 |
"Map", "constructor" }, |
| 320 |
{ &V8_OFF_MAP_INOBJECT_PROPERTIES,
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| 321 |
"Map", "inobject_properties" }, |
| 322 |
{ &V8_OFF_MAP_INSTANCE_ATTRIBUTES,
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| 323 |
"Map", "instance_attributes" }, |
| 324 |
{ &V8_OFF_MAP_INSTANCE_DESCRIPTORS,
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| 325 |
"Map", "instance_descriptors", B_TRUE }, |
| 326 |
{ &V8_OFF_MAP_TRANSITIONS,
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| 327 |
"Map", "transitions", B_TRUE }, |
| 328 |
{ &V8_OFF_MAP_INSTANCE_SIZE,
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| 329 |
"Map", "instance_size" }, |
| 330 |
{ &V8_OFF_MAP_BIT_FIELD3,
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| 331 |
"Map", "bit_field3", B_TRUE }, |
| 332 |
{ &V8_OFF_ODDBALL_TO_STRING,
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| 333 |
"Oddball", "to_string" }, |
| 334 |
{ &V8_OFF_SCRIPT_LINE_ENDS,
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| 335 |
"Script", "line_ends" }, |
| 336 |
{ &V8_OFF_SCRIPT_NAME,
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| 337 |
"Script", "name" }, |
| 338 |
{ &V8_OFF_SEQASCIISTR_CHARS,
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| 339 |
"SeqAsciiString", "chars", B_TRUE }, |
| 340 |
{ &V8_OFF_SEQONEBYTESTR_CHARS,
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| 341 |
"SeqOneByteString", "chars", B_TRUE }, |
| 342 |
{ &V8_OFF_SHAREDFUNCTIONINFO_CODE,
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| 343 |
"SharedFunctionInfo", "code" }, |
| 344 |
{ &V8_OFF_SHAREDFUNCTIONINFO_FUNCTION_TOKEN_POSITION,
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| 345 |
"SharedFunctionInfo", "function_token_position" }, |
| 346 |
{ &V8_OFF_SHAREDFUNCTIONINFO_INFERRED_NAME,
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"SharedFunctionInfo", "inferred_name" }, |
| 348 |
{ &V8_OFF_SHAREDFUNCTIONINFO_LENGTH,
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| 349 |
"SharedFunctionInfo", "length" }, |
| 350 |
{ &V8_OFF_SHAREDFUNCTIONINFO_NAME,
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| 351 |
"SharedFunctionInfo", "name" }, |
| 352 |
{ &V8_OFF_SHAREDFUNCTIONINFO_SCRIPT,
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"SharedFunctionInfo", "script" }, |
| 354 |
{ &V8_OFF_STRING_LENGTH,
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"String", "length" }, |
| 356 |
}; |
| 357 |
|
| 358 |
static int v8_noffsets = sizeof (v8_offsets) / sizeof (v8_offsets[0]); |
| 359 |
|
| 360 |
static uintptr_t v8_major;
|
| 361 |
static uintptr_t v8_minor;
|
| 362 |
static uintptr_t v8_build;
|
| 363 |
static uintptr_t v8_patch;
|
| 364 |
|
| 365 |
static int autoconf_iter_symbol(mdb_symbol_t *, void *); |
| 366 |
static v8_class_t *conf_class_findcreate(const char *); |
| 367 |
static v8_field_t *conf_field_create(v8_class_t *, const char *, size_t); |
| 368 |
static char *conf_next_part(char *, char *); |
| 369 |
static int conf_update_parent(const char *); |
| 370 |
static int conf_update_field(v8_cfg_t *, const char *); |
| 371 |
static int conf_update_enum(v8_cfg_t *, const char *, const char *, |
| 372 |
v8_enum_t *); |
| 373 |
static int conf_update_type(v8_cfg_t *, const char *); |
| 374 |
static int conf_update_frametype(v8_cfg_t *, const char *); |
| 375 |
static void conf_class_compute_offsets(v8_class_t *); |
| 376 |
|
| 377 |
static int read_typebyte(uint8_t *, uintptr_t); |
| 378 |
static int heap_offset(const char *, const char *, ssize_t *); |
| 379 |
|
| 380 |
/*
|
| 381 |
* Invoked when this dmod is initially loaded to load the set of classes, enums,
|
| 382 |
* and other constants from the metadata in the target binary.
|
| 383 |
*/
|
| 384 |
static int |
| 385 |
autoconfigure(v8_cfg_t *cfgp) |
| 386 |
{
|
| 387 |
v8_class_t *clp; |
| 388 |
v8_enum_t *ep; |
| 389 |
struct v8_constant *cnp;
|
| 390 |
int ii;
|
| 391 |
int failed = 0; |
| 392 |
|
| 393 |
assert(v8_classes == NULL);
|
| 394 |
|
| 395 |
/*
|
| 396 |
* Iterate all global symbols looking for metadata.
|
| 397 |
*/
|
| 398 |
if (cfgp->v8cfg_iter(cfgp, autoconf_iter_symbol, cfgp) != 0) { |
| 399 |
mdb_warn("failed to autoconfigure V8 support\n");
|
| 400 |
return (-1); |
| 401 |
} |
| 402 |
|
| 403 |
/*
|
| 404 |
* By now we've configured all of the classes so we can update the
|
| 405 |
* "start" and "end" fields in each class with information from its
|
| 406 |
* parent class.
|
| 407 |
*/
|
| 408 |
for (clp = v8_classes; clp != NULL; clp = clp->v8c_next) { |
| 409 |
if (clp->v8c_end != (size_t)-1) |
| 410 |
continue;
|
| 411 |
|
| 412 |
conf_class_compute_offsets(clp); |
| 413 |
}; |
| 414 |
|
| 415 |
/*
|
| 416 |
* Load various constants used directly in the module.
|
| 417 |
*/
|
| 418 |
for (ii = 0; ii < v8_nconstants; ii++) { |
| 419 |
cnp = &v8_constants[ii]; |
| 420 |
|
| 421 |
if (cfgp->v8cfg_readsym(cfgp,
|
| 422 |
cnp->v8c_symbol, cnp->v8c_valp) != -1) {
|
| 423 |
continue;
|
| 424 |
} |
| 425 |
|
| 426 |
if (!(cnp->v8c_flags & V8_CONSTANT_OPTIONAL)) {
|
| 427 |
mdb_warn("failed to read \"%s\"", cnp->v8c_symbol);
|
| 428 |
failed++; |
| 429 |
continue;
|
| 430 |
} |
| 431 |
|
| 432 |
if (!(cnp->v8c_flags & V8_CONSTANT_HASFALLBACK) ||
|
| 433 |
v8_major < V8_CONSTANT_MAJOR(cnp->v8c_flags) || |
| 434 |
(v8_major == V8_CONSTANT_MAJOR(cnp->v8c_flags) && |
| 435 |
v8_minor < V8_CONSTANT_MINOR(cnp->v8c_flags))) {
|
| 436 |
*cnp->v8c_valp = -1;
|
| 437 |
continue;
|
| 438 |
} |
| 439 |
|
| 440 |
/*
|
| 441 |
* We have a fallback -- and we know that the version satisfies
|
| 442 |
* the fallback's version constraints; use the fallback value.
|
| 443 |
*/
|
| 444 |
*cnp->v8c_valp = cnp->v8c_fallback; |
| 445 |
} |
| 446 |
|
| 447 |
/*
|
| 448 |
* Load type values for well-known classes that we use a lot.
|
| 449 |
*/
|
| 450 |
for (ep = v8_types; ep->v8e_name[0] != '\0'; ep++) { |
| 451 |
if (strcmp(ep->v8e_name, "JSObject") == 0) |
| 452 |
V8_TYPE_JSOBJECT = ep->v8e_value; |
| 453 |
|
| 454 |
if (strcmp(ep->v8e_name, "JSArray") == 0) |
| 455 |
V8_TYPE_JSARRAY = ep->v8e_value; |
| 456 |
|
| 457 |
if (strcmp(ep->v8e_name, "FixedArray") == 0) |
| 458 |
V8_TYPE_FIXEDARRAY = ep->v8e_value; |
| 459 |
} |
| 460 |
|
| 461 |
if (V8_TYPE_JSOBJECT == -1) { |
| 462 |
mdb_warn("couldn't find JSObject type\n");
|
| 463 |
failed++; |
| 464 |
} |
| 465 |
|
| 466 |
if (V8_TYPE_JSARRAY == -1) { |
| 467 |
mdb_warn("couldn't find JSArray type\n");
|
| 468 |
failed++; |
| 469 |
} |
| 470 |
|
| 471 |
if (V8_TYPE_FIXEDARRAY == -1) { |
| 472 |
mdb_warn("couldn't find FixedArray type\n");
|
| 473 |
failed++; |
| 474 |
} |
| 475 |
|
| 476 |
/*
|
| 477 |
* Finally, load various class offsets.
|
| 478 |
*/
|
| 479 |
for (ii = 0; ii < v8_noffsets; ii++) { |
| 480 |
struct v8_offset *offp = &v8_offsets[ii];
|
| 481 |
const char *klass = offp->v8o_class; |
| 482 |
|
| 483 |
again:
|
| 484 |
if (heap_offset(klass, offp->v8o_member, offp->v8o_valp) == 0) |
| 485 |
continue;
|
| 486 |
|
| 487 |
if (strcmp(klass, "FixedArray") == 0) { |
| 488 |
/*
|
| 489 |
* The V8 included in node v0.6 uses a FixedArrayBase
|
| 490 |
* class to contain the "length" field, while the one
|
| 491 |
* in v0.4 has no such base class and stores the field
|
| 492 |
* directly in FixedArray; if we failed to derive
|
| 493 |
* the offset from FixedArray, try FixedArrayBase.
|
| 494 |
*/
|
| 495 |
klass = "FixedArrayBase";
|
| 496 |
goto again;
|
| 497 |
} |
| 498 |
|
| 499 |
if (offp->v8o_optional) {
|
| 500 |
*offp->v8o_valp = -1;
|
| 501 |
continue;
|
| 502 |
} |
| 503 |
|
| 504 |
mdb_warn("couldn't find class \"%s\", field \"%s\"\n",
|
| 505 |
offp->v8o_class, offp->v8o_member); |
| 506 |
failed++; |
| 507 |
} |
| 508 |
|
| 509 |
if (!((V8_OFF_SEQASCIISTR_CHARS != -1) ^ |
| 510 |
(V8_OFF_SEQONEBYTESTR_CHARS != -1))) {
|
| 511 |
mdb_warn("expected exactly one of SeqAsciiString and "
|
| 512 |
"SeqOneByteString to be defined\n");
|
| 513 |
failed++; |
| 514 |
} |
| 515 |
|
| 516 |
if (V8_OFF_SEQONEBYTESTR_CHARS != -1) |
| 517 |
V8_OFF_SEQASCIISTR_CHARS = V8_OFF_SEQONEBYTESTR_CHARS; |
| 518 |
|
| 519 |
return (failed ? -1 : 0); |
| 520 |
} |
| 521 |
|
| 522 |
/* ARGSUSED */
|
| 523 |
static int |
| 524 |
autoconf_iter_symbol(mdb_symbol_t *symp, void *arg)
|
| 525 |
{
|
| 526 |
v8_cfg_t *cfgp = arg; |
| 527 |
|
| 528 |
if (strncmp(symp->sym_name, "v8dbg_parent_", |
| 529 |
sizeof ("v8dbg_parent_") - 1) == 0) |
| 530 |
return (conf_update_parent(symp->sym_name));
|
| 531 |
|
| 532 |
if (strncmp(symp->sym_name, "v8dbg_class_", |
| 533 |
sizeof ("v8dbg_class_") - 1) == 0) |
| 534 |
return (conf_update_field(cfgp, symp->sym_name));
|
| 535 |
|
| 536 |
if (strncmp(symp->sym_name, "v8dbg_type_", |
| 537 |
sizeof ("v8dbg_type_") - 1) == 0) |
| 538 |
return (conf_update_type(cfgp, symp->sym_name));
|
| 539 |
|
| 540 |
if (strncmp(symp->sym_name, "v8dbg_frametype_", |
| 541 |
sizeof ("v8dbg_frametype_") - 1) == 0) |
| 542 |
return (conf_update_frametype(cfgp, symp->sym_name));
|
| 543 |
|
| 544 |
return (0); |
| 545 |
} |
| 546 |
|
| 547 |
/*
|
| 548 |
* Extracts the next field of a string whose fields are separated by "__" (as
|
| 549 |
* the V8 metadata symbols are).
|
| 550 |
*/
|
| 551 |
static char * |
| 552 |
conf_next_part(char *buf, char *start) |
| 553 |
{
|
| 554 |
char *pp;
|
| 555 |
|
| 556 |
if ((pp = strstr(start, "__")) == NULL) { |
| 557 |
mdb_warn("malformed symbol name: %s\n", buf);
|
| 558 |
return (NULL); |
| 559 |
} |
| 560 |
|
| 561 |
*pp = '\0';
|
| 562 |
return (pp + sizeof ("__") - 1); |
| 563 |
} |
| 564 |
|
| 565 |
static v8_class_t *
|
| 566 |
conf_class_findcreate(const char *name) |
| 567 |
{
|
| 568 |
v8_class_t *clp, *iclp, *prev = NULL;
|
| 569 |
int cmp;
|
| 570 |
|
| 571 |
for (iclp = v8_classes; iclp != NULL; iclp = iclp->v8c_next) { |
| 572 |
if ((cmp = strcmp(iclp->v8c_name, name)) == 0) |
| 573 |
return (iclp);
|
| 574 |
|
| 575 |
if (cmp > 0) |
| 576 |
break;
|
| 577 |
|
| 578 |
prev = iclp; |
| 579 |
} |
| 580 |
|
| 581 |
if ((clp = mdb_zalloc(sizeof (*clp), UM_NOSLEEP)) == NULL) |
| 582 |
return (NULL); |
| 583 |
|
| 584 |
(void) strlcpy(clp->v8c_name, name, sizeof (clp->v8c_name)); |
| 585 |
clp->v8c_end = (size_t)-1;
|
| 586 |
clp->v8c_next = iclp; |
| 587 |
|
| 588 |
if (prev != NULL) { |
| 589 |
prev->v8c_next = clp; |
| 590 |
} else {
|
| 591 |
v8_classes = clp; |
| 592 |
} |
| 593 |
|
| 594 |
return (clp);
|
| 595 |
} |
| 596 |
|
| 597 |
static v8_field_t *
|
| 598 |
conf_field_create(v8_class_t *clp, const char *name, size_t offset) |
| 599 |
{
|
| 600 |
v8_field_t *flp, *iflp; |
| 601 |
|
| 602 |
if ((flp = mdb_zalloc(sizeof (*flp), UM_NOSLEEP)) == NULL) |
| 603 |
return (NULL); |
| 604 |
|
| 605 |
(void) strlcpy(flp->v8f_name, name, sizeof (flp->v8f_name)); |
| 606 |
flp->v8f_offset = offset; |
| 607 |
|
| 608 |
if (clp->v8c_fields == NULL || clp->v8c_fields->v8f_offset > offset) { |
| 609 |
flp->v8f_next = clp->v8c_fields; |
| 610 |
clp->v8c_fields = flp; |
| 611 |
return (flp);
|
| 612 |
} |
| 613 |
|
| 614 |
for (iflp = clp->v8c_fields; iflp->v8f_next != NULL; |
| 615 |
iflp = iflp->v8f_next) {
|
| 616 |
if (iflp->v8f_next->v8f_offset > offset)
|
| 617 |
break;
|
| 618 |
} |
| 619 |
|
| 620 |
flp->v8f_next = iflp->v8f_next; |
| 621 |
iflp->v8f_next = flp; |
| 622 |
return (flp);
|
| 623 |
} |
| 624 |
|
| 625 |
/*
|
| 626 |
* Given a "v8dbg_parent_X__Y", symbol, update the parent of class X to class Y.
|
| 627 |
* Note that neither class necessarily exists already.
|
| 628 |
*/
|
| 629 |
static int |
| 630 |
conf_update_parent(const char *symbol) |
| 631 |
{
|
| 632 |
char *pp, *qq;
|
| 633 |
char buf[128]; |
| 634 |
v8_class_t *clp, *pclp; |
| 635 |
|
| 636 |
(void) strlcpy(buf, symbol, sizeof (buf)); |
| 637 |
pp = buf + sizeof ("v8dbg_parent_") - 1; |
| 638 |
qq = conf_next_part(buf, pp); |
| 639 |
|
| 640 |
if (qq == NULL) |
| 641 |
return (-1); |
| 642 |
|
| 643 |
clp = conf_class_findcreate(pp); |
| 644 |
pclp = conf_class_findcreate(qq); |
| 645 |
|
| 646 |
if (clp == NULL || pclp == NULL) { |
| 647 |
mdb_warn("mdb_v8: out of memory\n");
|
| 648 |
return (-1); |
| 649 |
} |
| 650 |
|
| 651 |
clp->v8c_parent = pclp; |
| 652 |
return (0); |
| 653 |
} |
| 654 |
|
| 655 |
/*
|
| 656 |
* Given a "v8dbg_class_CLASS__FIELD__TYPE", symbol, save field "FIELD" into
|
| 657 |
* class CLASS with the offset described by the symbol. Note that CLASS does
|
| 658 |
* not necessarily exist already.
|
| 659 |
*/
|
| 660 |
static int |
| 661 |
conf_update_field(v8_cfg_t *cfgp, const char *symbol) |
| 662 |
{
|
| 663 |
v8_class_t *clp; |
| 664 |
v8_field_t *flp; |
| 665 |
intptr_t offset; |
| 666 |
char *pp, *qq, *tt;
|
| 667 |
char buf[128]; |
| 668 |
|
| 669 |
(void) strlcpy(buf, symbol, sizeof (buf)); |
| 670 |
|
| 671 |
pp = buf + sizeof ("v8dbg_class_") - 1; |
| 672 |
qq = conf_next_part(buf, pp); |
| 673 |
|
| 674 |
if (qq == NULL || (tt = conf_next_part(buf, qq)) == NULL) |
| 675 |
return (-1); |
| 676 |
|
| 677 |
if (cfgp->v8cfg_readsym(cfgp, symbol, &offset) == -1) { |
| 678 |
mdb_warn("failed to read symbol \"%s\"", symbol);
|
| 679 |
return (-1); |
| 680 |
} |
| 681 |
|
| 682 |
if ((clp = conf_class_findcreate(pp)) == NULL || |
| 683 |
(flp = conf_field_create(clp, qq, (size_t)offset)) == NULL)
|
| 684 |
return (-1); |
| 685 |
|
| 686 |
if (strcmp(tt, "int") == 0) |
| 687 |
flp->v8f_isbyte = B_TRUE; |
| 688 |
|
| 689 |
if (strcmp(tt, "char") == 0) |
| 690 |
flp->v8f_isstr = B_TRUE; |
| 691 |
|
| 692 |
return (0); |
| 693 |
} |
| 694 |
|
| 695 |
static int |
| 696 |
conf_update_enum(v8_cfg_t *cfgp, const char *symbol, const char *name, |
| 697 |
v8_enum_t *enp) |
| 698 |
{
|
| 699 |
intptr_t value; |
| 700 |
|
| 701 |
if (cfgp->v8cfg_readsym(cfgp, symbol, &value) == -1) { |
| 702 |
mdb_warn("failed to read symbol \"%s\"", symbol);
|
| 703 |
return (-1); |
| 704 |
} |
| 705 |
|
| 706 |
enp->v8e_value = (int)value;
|
| 707 |
(void) strlcpy(enp->v8e_name, name, sizeof (enp->v8e_name)); |
| 708 |
return (0); |
| 709 |
} |
| 710 |
|
| 711 |
/*
|
| 712 |
* Given a "v8dbg_type_TYPENAME" constant, save the type name in v8_types. Note
|
| 713 |
* that this enum has multiple integer values with the same string label.
|
| 714 |
*/
|
| 715 |
static int |
| 716 |
conf_update_type(v8_cfg_t *cfgp, const char *symbol) |
| 717 |
{
|
| 718 |
char *klass;
|
| 719 |
v8_enum_t *enp; |
| 720 |
char buf[128]; |
| 721 |
|
| 722 |
if (v8_next_type > sizeof (v8_types) / sizeof (v8_types[0])) { |
| 723 |
mdb_warn("too many V8 types\n");
|
| 724 |
return (-1); |
| 725 |
} |
| 726 |
|
| 727 |
(void) strlcpy(buf, symbol, sizeof (buf)); |
| 728 |
|
| 729 |
klass = buf + sizeof ("v8dbg_type_") - 1; |
| 730 |
if (conf_next_part(buf, klass) == NULL) |
| 731 |
return (-1); |
| 732 |
|
| 733 |
enp = &v8_types[v8_next_type++]; |
| 734 |
return (conf_update_enum(cfgp, symbol, klass, enp));
|
| 735 |
} |
| 736 |
|
| 737 |
/*
|
| 738 |
* Given a "v8dbg_frametype_TYPENAME" constant, save the frame type in
|
| 739 |
* v8_frametypes.
|
| 740 |
*/
|
| 741 |
static int |
| 742 |
conf_update_frametype(v8_cfg_t *cfgp, const char *symbol) |
| 743 |
{
|
| 744 |
const char *frametype; |
| 745 |
v8_enum_t *enp; |
| 746 |
|
| 747 |
if (v8_next_frametype >
|
| 748 |
sizeof (v8_frametypes) / sizeof (v8_frametypes[0])) { |
| 749 |
mdb_warn("too many V8 frame types\n");
|
| 750 |
return (-1); |
| 751 |
} |
| 752 |
|
| 753 |
enp = &v8_frametypes[v8_next_frametype++]; |
| 754 |
frametype = symbol + sizeof ("v8dbg_frametype_") - 1; |
| 755 |
return (conf_update_enum(cfgp, symbol, frametype, enp));
|
| 756 |
} |
| 757 |
|
| 758 |
/*
|
| 759 |
* Now that all classes have been loaded, update the "start" and "end" fields of
|
| 760 |
* each class based on the values of its parent class.
|
| 761 |
*/
|
| 762 |
static void |
| 763 |
conf_class_compute_offsets(v8_class_t *clp) |
| 764 |
{
|
| 765 |
v8_field_t *flp; |
| 766 |
|
| 767 |
assert(clp->v8c_start == 0);
|
| 768 |
assert(clp->v8c_end == (size_t)-1);
|
| 769 |
|
| 770 |
if (clp->v8c_parent != NULL) { |
| 771 |
if (clp->v8c_parent->v8c_end == (size_t)-1) |
| 772 |
conf_class_compute_offsets(clp->v8c_parent); |
| 773 |
|
| 774 |
clp->v8c_start = clp->v8c_parent->v8c_end; |
| 775 |
} |
| 776 |
|
| 777 |
if (clp->v8c_fields == NULL) { |
| 778 |
clp->v8c_end = clp->v8c_start; |
| 779 |
return;
|
| 780 |
} |
| 781 |
|
| 782 |
for (flp = clp->v8c_fields; flp->v8f_next != NULL; flp = flp->v8f_next) |
| 783 |
; |
| 784 |
|
| 785 |
if (flp == NULL) |
| 786 |
clp->v8c_end = clp->v8c_start; |
| 787 |
else
|
| 788 |
clp->v8c_end = flp->v8f_offset + sizeof (uintptr_t);
|
| 789 |
} |
| 790 |
|
| 791 |
/*
|
| 792 |
* Utility functions
|
| 793 |
*/
|
| 794 |
#define JSSTR_NONE 0 |
| 795 |
#define JSSTR_NUDE JSSTR_NONE
|
| 796 |
#define JSSTR_VERBOSE 0x1 |
| 797 |
#define JSSTR_QUOTED 0x2 |
| 798 |
|
| 799 |
static int jsstr_print(uintptr_t, uint_t, char **, size_t *); |
| 800 |
static boolean_t jsobj_is_undefined(uintptr_t addr);
|
| 801 |
|
| 802 |
static const char * |
| 803 |
enum_lookup_str(v8_enum_t *enums, int val, const char *dflt) |
| 804 |
{
|
| 805 |
v8_enum_t *ep; |
| 806 |
|
| 807 |
for (ep = enums; ep->v8e_name[0] != '\0'; ep++) { |
| 808 |
if (ep->v8e_value == val)
|
| 809 |
return (ep->v8e_name);
|
| 810 |
} |
| 811 |
|
| 812 |
return (dflt);
|
| 813 |
} |
| 814 |
|
| 815 |
static void |
| 816 |
enum_print(v8_enum_t *enums) |
| 817 |
{
|
| 818 |
v8_enum_t *itp; |
| 819 |
|
| 820 |
for (itp = enums; itp->v8e_name[0] != '\0'; itp++) |
| 821 |
mdb_printf("%-30s = 0x%02x\n", itp->v8e_name, itp->v8e_value);
|
| 822 |
} |
| 823 |
|
| 824 |
/*
|
| 825 |
* b[v]snprintf behave like [v]snprintf(3c), except that they update the buffer
|
| 826 |
* and length arguments based on how much buffer space is used by the operation.
|
| 827 |
* This makes it much easier to combine multiple calls in sequence without
|
| 828 |
* worrying about buffer overflow.
|
| 829 |
*/
|
| 830 |
static size_t
|
| 831 |
bvsnprintf(char **bufp, size_t *buflenp, const char *format, va_list alist) |
| 832 |
{
|
| 833 |
size_t rv, len; |
| 834 |
|
| 835 |
if (*buflenp == 0) |
| 836 |
return (vsnprintf(NULL, 0, format, alist)); |
| 837 |
|
| 838 |
rv = vsnprintf(*bufp, *buflenp, format, alist); |
| 839 |
|
| 840 |
len = MIN(rv, *buflenp); |
| 841 |
*buflenp -= len; |
| 842 |
*bufp += len; |
| 843 |
|
| 844 |
return (len);
|
| 845 |
} |
| 846 |
|
| 847 |
static size_t
|
| 848 |
bsnprintf(char **bufp, size_t *buflenp, const char *format, ...) |
| 849 |
{
|
| 850 |
va_list alist; |
| 851 |
size_t rv; |
| 852 |
|
| 853 |
va_start(alist, format); |
| 854 |
rv = bvsnprintf(bufp, buflenp, format, alist); |
| 855 |
va_end(alist); |
| 856 |
|
| 857 |
return (rv);
|
| 858 |
} |
| 859 |
|
| 860 |
static void |
| 861 |
v8_warn(const char *format, ...) |
| 862 |
{
|
| 863 |
char buf[512]; |
| 864 |
va_list alist; |
| 865 |
int len;
|
| 866 |
|
| 867 |
if (v8_silent)
|
| 868 |
return;
|
| 869 |
|
| 870 |
va_start(alist, format); |
| 871 |
(void) vsnprintf(buf, sizeof (buf), format, alist); |
| 872 |
va_end(alist); |
| 873 |
|
| 874 |
/*
|
| 875 |
* This is made slightly annoying because we need to effectively
|
| 876 |
* preserve the original format string to allow for mdb to use the
|
| 877 |
* new-line at the end to indicate that strerror should be elided.
|
| 878 |
*/
|
| 879 |
if ((len = strlen(format)) > 0 && format[len - 1] == '\n') { |
| 880 |
buf[strlen(buf) - 1] = '\0'; |
| 881 |
mdb_warn("%s\n", buf);
|
| 882 |
} else {
|
| 883 |
mdb_warn("%s", buf);
|
| 884 |
} |
| 885 |
} |
| 886 |
|
| 887 |
/*
|
| 888 |
* Returns in "offp" the offset of field "field" in C++ class "klass".
|
| 889 |
*/
|
| 890 |
static int |
| 891 |
heap_offset(const char *klass, const char *field, ssize_t *offp) |
| 892 |
{
|
| 893 |
v8_class_t *clp; |
| 894 |
v8_field_t *flp; |
| 895 |
|
| 896 |
for (clp = v8_classes; clp != NULL; clp = clp->v8c_next) { |
| 897 |
if (strcmp(klass, clp->v8c_name) == 0) |
| 898 |
break;
|
| 899 |
} |
| 900 |
|
| 901 |
if (clp == NULL) |
| 902 |
return (-1); |
| 903 |
|
| 904 |
for (flp = clp->v8c_fields; flp != NULL; flp = flp->v8f_next) { |
| 905 |
if (strcmp(field, flp->v8f_name) == 0) |
| 906 |
break;
|
| 907 |
} |
| 908 |
|
| 909 |
if (flp == NULL) |
| 910 |
return (-1); |
| 911 |
|
| 912 |
*offp = V8_OFF_HEAP(flp->v8f_offset); |
| 913 |
return (0); |
| 914 |
} |
| 915 |
|
| 916 |
/*
|
| 917 |
* Assuming "addr" is an instance of the C++ heap class "klass", read into *valp
|
| 918 |
* the pointer-sized value of field "field".
|
| 919 |
*/
|
| 920 |
static int |
| 921 |
read_heap_ptr(uintptr_t *valp, uintptr_t addr, ssize_t off) |
| 922 |
{
|
| 923 |
if (mdb_vread(valp, sizeof (*valp), addr + off) == -1) { |
| 924 |
v8_warn("failed to read offset %d from %p", off, addr);
|
| 925 |
return (-1); |
| 926 |
} |
| 927 |
|
| 928 |
return (0); |
| 929 |
} |
| 930 |
|
| 931 |
/*
|
| 932 |
* Like read_heap_ptr, but assume the field is an SMI and store the actual value
|
| 933 |
* into *valp rather than the encoded representation.
|
| 934 |
*/
|
| 935 |
static int |
| 936 |
read_heap_smi(uintptr_t *valp, uintptr_t addr, ssize_t off) |
| 937 |
{
|
| 938 |
if (read_heap_ptr(valp, addr, off) != 0) |
| 939 |
return (-1); |
| 940 |
|
| 941 |
if (!V8_IS_SMI(*valp)) {
|
| 942 |
v8_warn("expected SMI, got %p\n", *valp);
|
| 943 |
return (-1); |
| 944 |
} |
| 945 |
|
| 946 |
*valp = V8_SMI_VALUE(*valp); |
| 947 |
|
| 948 |
return (0); |
| 949 |
} |
| 950 |
|
| 951 |
static int |
| 952 |
read_heap_double(double *valp, uintptr_t addr, ssize_t off)
|
| 953 |
{
|
| 954 |
if (mdb_vread(valp, sizeof (*valp), addr + off) == -1) { |
| 955 |
v8_warn("failed to read heap value at %p", addr + off);
|
| 956 |
return (-1); |
| 957 |
} |
| 958 |
|
| 959 |
return (0); |
| 960 |
} |
| 961 |
|
| 962 |
/*
|
| 963 |
* Assuming "addr" refers to a FixedArray, return a newly-allocated array
|
| 964 |
* representing its contents.
|
| 965 |
*/
|
| 966 |
static int |
| 967 |
read_heap_array(uintptr_t addr, uintptr_t **retp, size_t *lenp, int flags)
|
| 968 |
{
|
| 969 |
uint8_t type; |
| 970 |
uintptr_t len; |
| 971 |
|
| 972 |
if (!V8_IS_HEAPOBJECT(addr))
|
| 973 |
return (-1); |
| 974 |
|
| 975 |
if (read_typebyte(&type, addr) != 0) |
| 976 |
return (-1); |
| 977 |
|
| 978 |
if (type != V8_TYPE_FIXEDARRAY)
|
| 979 |
return (-1); |
| 980 |
|
| 981 |
if (read_heap_smi(&len, addr, V8_OFF_FIXEDARRAY_LENGTH) != 0) |
| 982 |
return (-1); |
| 983 |
|
| 984 |
*lenp = len; |
| 985 |
|
| 986 |
if (len == 0) { |
| 987 |
*retp = NULL;
|
| 988 |
return (0); |
| 989 |
} |
| 990 |
|
| 991 |
if ((*retp = mdb_zalloc(len * sizeof (uintptr_t), flags)) == NULL) |
| 992 |
return (-1); |
| 993 |
|
| 994 |
if (mdb_vread(*retp, len * sizeof (uintptr_t), |
| 995 |
addr + V8_OFF_FIXEDARRAY_DATA) == -1) {
|
| 996 |
if (!(flags & UM_GC))
|
| 997 |
mdb_free(*retp, len * sizeof (uintptr_t));
|
| 998 |
|
| 999 |
return (-1); |
| 1000 |
} |
| 1001 |
|
| 1002 |
return (0); |
| 1003 |
} |
| 1004 |
|
| 1005 |
static int |
| 1006 |
read_heap_byte(uint8_t *valp, uintptr_t addr, ssize_t off) |
| 1007 |
{
|
| 1008 |
if (mdb_vread(valp, sizeof (*valp), addr + off) == -1) { |
| 1009 |
v8_warn("failed to read heap value at %p", addr + off);
|
| 1010 |
return (-1); |
| 1011 |
} |
| 1012 |
|
| 1013 |
return (0); |
| 1014 |
} |
| 1015 |
|
| 1016 |
/*
|
| 1017 |
* Given a heap object, returns in *valp the byte describing the type of the
|
| 1018 |
* object. This is shorthand for first retrieving the Map at the start of the
|
| 1019 |
* heap object and then retrieving the type byte from the Map object.
|
| 1020 |
*/
|
| 1021 |
static int |
| 1022 |
read_typebyte(uint8_t *valp, uintptr_t addr) |
| 1023 |
{
|
| 1024 |
uintptr_t mapaddr; |
| 1025 |
ssize_t off = V8_OFF_HEAPOBJECT_MAP; |
| 1026 |
|
| 1027 |
if (mdb_vread(&mapaddr, sizeof (mapaddr), addr + off) == -1) { |
| 1028 |
v8_warn("failed to read type of %p", addr);
|
| 1029 |
return (-1); |
| 1030 |
} |
| 1031 |
|
| 1032 |
if (!V8_IS_HEAPOBJECT(mapaddr)) {
|
| 1033 |
v8_warn("object map is not a heap object\n");
|
| 1034 |
return (-1); |
| 1035 |
} |
| 1036 |
|
| 1037 |
if (read_heap_byte(valp, mapaddr, V8_OFF_MAP_INSTANCE_ATTRIBUTES) == -1) |
| 1038 |
return (-1); |
| 1039 |
|
| 1040 |
return (0); |
| 1041 |
} |
| 1042 |
|
| 1043 |
/*
|
| 1044 |
* Given a heap object, returns in *valp the size of the object. For
|
| 1045 |
* variable-size objects, returns an undefined value.
|
| 1046 |
*/
|
| 1047 |
static int |
| 1048 |
read_size(size_t *valp, uintptr_t addr) |
| 1049 |
{
|
| 1050 |
uintptr_t mapaddr; |
| 1051 |
uint8_t size; |
| 1052 |
|
| 1053 |
if (read_heap_ptr(&mapaddr, addr, V8_OFF_HEAPOBJECT_MAP) != 0) |
| 1054 |
return (-1); |
| 1055 |
|
| 1056 |
if (!V8_IS_HEAPOBJECT(mapaddr)) {
|
| 1057 |
v8_warn("heap object map is not itself a heap object\n");
|
| 1058 |
return (-1); |
| 1059 |
} |
| 1060 |
|
| 1061 |
if (read_heap_byte(&size, mapaddr, V8_OFF_MAP_INSTANCE_SIZE) != 0) |
| 1062 |
return (-1); |
| 1063 |
|
| 1064 |
*valp = size << V8_PointerSizeLog2; |
| 1065 |
return (0); |
| 1066 |
} |
| 1067 |
|
| 1068 |
/*
|
| 1069 |
* Assuming "addr" refers to a FixedArray that is implementing a
|
| 1070 |
* StringDictionary, iterate over its contents calling the specified function
|
| 1071 |
* with key and value.
|
| 1072 |
*/
|
| 1073 |
static int |
| 1074 |
read_heap_dict(uintptr_t addr, |
| 1075 |
int (*func)(const char *, uintptr_t, void *), void *arg) |
| 1076 |
{
|
| 1077 |
uint8_t type; |
| 1078 |
uintptr_t len; |
| 1079 |
char buf[512]; |
| 1080 |
char *bufp;
|
| 1081 |
int rval = -1; |
| 1082 |
uintptr_t *dict, ndict, i; |
| 1083 |
const char *typename; |
| 1084 |
|
| 1085 |
if (read_heap_array(addr, &dict, &ndict, UM_SLEEP) != 0) |
| 1086 |
return (-1); |
| 1087 |
|
| 1088 |
if (V8_DICT_ENTRY_SIZE < 2) { |
| 1089 |
v8_warn("dictionary entry size (%d) is too small for a "
|
| 1090 |
"key and value\n", V8_DICT_ENTRY_SIZE);
|
| 1091 |
goto out;
|
| 1092 |
} |
| 1093 |
|
| 1094 |
for (i = V8_DICT_START_INDEX + V8_DICT_PREFIX_SIZE; i < ndict;
|
| 1095 |
i += V8_DICT_ENTRY_SIZE) {
|
| 1096 |
/*
|
| 1097 |
* The layout here is key, value, details. (This is hardcoded
|
| 1098 |
* in Dictionary<Shape, Key>::SetEntry().)
|
| 1099 |
*/
|
| 1100 |
if (jsobj_is_undefined(dict[i]))
|
| 1101 |
continue;
|
| 1102 |
|
| 1103 |
if (read_typebyte(&type, dict[i]) != 0) |
| 1104 |
goto out;
|
| 1105 |
|
| 1106 |
typename = enum_lookup_str(v8_types, type, NULL);
|
| 1107 |
|
| 1108 |
if (typename != NULL && strcmp(typename, "Oddball") == 0) { |
| 1109 |
/*
|
| 1110 |
* In some cases, the key can (apparently) be a hole;
|
| 1111 |
* assume that any Oddball in the key field falls into
|
| 1112 |
* this case and skip over it.
|
| 1113 |
*/
|
| 1114 |
continue;
|
| 1115 |
} |
| 1116 |
|
| 1117 |
if (!V8_TYPE_STRING(type))
|
| 1118 |
goto out;
|
| 1119 |
|
| 1120 |
bufp = buf; |
| 1121 |
len = sizeof (buf);
|
| 1122 |
|
| 1123 |
if (jsstr_print(dict[i], JSSTR_NUDE, &bufp, &len) != 0) |
| 1124 |
goto out;
|
| 1125 |
|
| 1126 |
if (func(buf, dict[i + 1], arg) == -1) |
| 1127 |
goto out;
|
| 1128 |
} |
| 1129 |
|
| 1130 |
rval = 0;
|
| 1131 |
out:
|
| 1132 |
mdb_free(dict, ndict * sizeof (uintptr_t));
|
| 1133 |
|
| 1134 |
return (rval);
|
| 1135 |
} |
| 1136 |
|
| 1137 |
/*
|
| 1138 |
* Returns in "buf" a description of the type of "addr" suitable for printing.
|
| 1139 |
*/
|
| 1140 |
static int |
| 1141 |
obj_jstype(uintptr_t addr, char **bufp, size_t *lenp, uint8_t *typep)
|
| 1142 |
{
|
| 1143 |
uint8_t typebyte; |
| 1144 |
uintptr_t strptr; |
| 1145 |
const char *typename; |
| 1146 |
|
| 1147 |
if (V8_IS_FAILURE(addr)) {
|
| 1148 |
if (typep)
|
| 1149 |
*typep = 0;
|
| 1150 |
(void) bsnprintf(bufp, lenp, "'Failure' object"); |
| 1151 |
return (0); |
| 1152 |
} |
| 1153 |
|
| 1154 |
if (V8_IS_SMI(addr)) {
|
| 1155 |
if (typep)
|
| 1156 |
*typep = 0;
|
| 1157 |
(void) bsnprintf(bufp, lenp, "SMI: value = %d", |
| 1158 |
V8_SMI_VALUE(addr)); |
| 1159 |
return (0); |
| 1160 |
} |
| 1161 |
|
| 1162 |
if (read_typebyte(&typebyte, addr) != 0) |
| 1163 |
return (-1); |
| 1164 |
|
| 1165 |
if (typep)
|
| 1166 |
*typep = typebyte; |
| 1167 |
|
| 1168 |
typename = enum_lookup_str(v8_types, typebyte, "<unknown>");
|
| 1169 |
(void) bsnprintf(bufp, lenp, typename);
|
| 1170 |
|
| 1171 |
if (strcmp(typename, "Oddball") == 0) { |
| 1172 |
if (read_heap_ptr(&strptr, addr,
|
| 1173 |
V8_OFF_ODDBALL_TO_STRING) != -1) {
|
| 1174 |
(void) bsnprintf(bufp, lenp, ": \""); |
| 1175 |
(void) jsstr_print(strptr, JSSTR_NUDE, bufp, lenp);
|
| 1176 |
(void) bsnprintf(bufp, lenp, "\""); |
| 1177 |
} |
| 1178 |
} |
| 1179 |
|
| 1180 |
return (0); |
| 1181 |
} |
| 1182 |
|
| 1183 |
/*
|
| 1184 |
* Print out the fields of the given object that come from the given class.
|
| 1185 |
*/
|
| 1186 |
static int |
| 1187 |
obj_print_fields(uintptr_t baddr, v8_class_t *clp) |
| 1188 |
{
|
| 1189 |
v8_field_t *flp; |
| 1190 |
uintptr_t addr, value; |
| 1191 |
int rv;
|
| 1192 |
char *bufp;
|
| 1193 |
size_t len; |
| 1194 |
uint8_t type; |
| 1195 |
char buf[256]; |
| 1196 |
|
| 1197 |
for (flp = clp->v8c_fields; flp != NULL; flp = flp->v8f_next) { |
| 1198 |
bufp = buf; |
| 1199 |
len = sizeof (buf);
|
| 1200 |
|
| 1201 |
addr = baddr + V8_OFF_HEAP(flp->v8f_offset); |
| 1202 |
|
| 1203 |
if (flp->v8f_isstr) {
|
| 1204 |
if (mdb_readstr(buf, sizeof (buf), addr) == -1) { |
| 1205 |
mdb_printf("%p %s (unreadable)\n",
|
| 1206 |
addr, flp->v8f_name); |
| 1207 |
continue;
|
| 1208 |
} |
| 1209 |
|
| 1210 |
mdb_printf("%p %s = \"%s\"\n",
|
| 1211 |
addr, flp->v8f_name, buf); |
| 1212 |
continue;
|
| 1213 |
} |
| 1214 |
|
| 1215 |
if (flp->v8f_isbyte) {
|
| 1216 |
uint8_t sv; |
| 1217 |
if (mdb_vread(&sv, sizeof (sv), addr) == -1) { |
| 1218 |
mdb_printf("%p %s (unreadable)\n",
|
| 1219 |
addr, flp->v8f_name); |
| 1220 |
continue;
|
| 1221 |
} |
| 1222 |
|
| 1223 |
mdb_printf("%p %s = 0x%x\n", addr, flp->v8f_name, sv);
|
| 1224 |
continue;
|
| 1225 |
} |
| 1226 |
|
| 1227 |
rv = mdb_vread((void *)&value, sizeof (value), addr); |
| 1228 |
|
| 1229 |
if (rv != sizeof (value) || |
| 1230 |
obj_jstype(value, &bufp, &len, &type) != 0) {
|
| 1231 |
mdb_printf("%p %s (unreadable)\n", addr, flp->v8f_name);
|
| 1232 |
continue;
|
| 1233 |
} |
| 1234 |
|
| 1235 |
if (type != 0 && V8_TYPE_STRING(type)) { |
| 1236 |
(void) bsnprintf(&bufp, &len, ": "); |
| 1237 |
(void) jsstr_print(value, JSSTR_QUOTED, &bufp, &len);
|
| 1238 |
} |
| 1239 |
|
| 1240 |
mdb_printf("%p %s = %p (%s)\n", addr, flp->v8f_name, value,
|
| 1241 |
buf); |
| 1242 |
} |
| 1243 |
|
| 1244 |
return (DCMD_OK);
|
| 1245 |
} |
| 1246 |
|
| 1247 |
/*
|
| 1248 |
* Print out all fields of the given object, starting with the root of the class
|
| 1249 |
* hierarchy and working down the most specific type.
|
| 1250 |
*/
|
| 1251 |
static int |
| 1252 |
obj_print_class(uintptr_t addr, v8_class_t *clp) |
| 1253 |
{
|
| 1254 |
int rv = 0; |
| 1255 |
|
| 1256 |
/*
|
| 1257 |
* If we have no fields, we just print a simple inheritance hierarchy.
|
| 1258 |
* If we have fields but our parent doesn't, our header includes the
|
| 1259 |
* inheritance hierarchy.
|
| 1260 |
*/
|
| 1261 |
if (clp->v8c_end == 0) { |
| 1262 |
mdb_printf("%s ", clp->v8c_name);
|
| 1263 |
|
| 1264 |
if (clp->v8c_parent != NULL) { |
| 1265 |
mdb_printf("< ");
|
| 1266 |
(void) obj_print_class(addr, clp->v8c_parent);
|
| 1267 |
} |
| 1268 |
|
| 1269 |
return (0); |
| 1270 |
} |
| 1271 |
|
| 1272 |
mdb_printf("%p %s", addr, clp->v8c_name);
|
| 1273 |
|
| 1274 |
if (clp->v8c_start == 0 && clp->v8c_parent != NULL) { |
| 1275 |
mdb_printf(" < ");
|
| 1276 |
(void) obj_print_class(addr, clp->v8c_parent);
|
| 1277 |
} |
| 1278 |
|
| 1279 |
mdb_printf(" {\n");
|
| 1280 |
(void) mdb_inc_indent(4); |
| 1281 |
|
| 1282 |
if (clp->v8c_start > 0 && clp->v8c_parent != NULL) |
| 1283 |
rv = obj_print_class(addr, clp->v8c_parent); |
| 1284 |
|
| 1285 |
rv |= obj_print_fields(addr, clp); |
| 1286 |
(void) mdb_dec_indent(4); |
| 1287 |
mdb_printf("}\n");
|
| 1288 |
|
| 1289 |
return (rv);
|
| 1290 |
} |
| 1291 |
|
| 1292 |
/*
|
| 1293 |
* Print the ASCII string for the given ASCII JS string, expanding ConsStrings
|
| 1294 |
* and ExternalStrings as needed.
|
| 1295 |
*/
|
| 1296 |
static int jsstr_print_seq(uintptr_t, uint_t, char **, size_t *); |
| 1297 |
static int jsstr_print_cons(uintptr_t, uint_t, char **, size_t *); |
| 1298 |
static int jsstr_print_external(uintptr_t, uint_t, char **, size_t *); |
| 1299 |
|
| 1300 |
static int |
| 1301 |
jsstr_print(uintptr_t addr, uint_t flags, char **bufp, size_t *lenp)
|
| 1302 |
{
|
| 1303 |
uint8_t typebyte; |
| 1304 |
int err = 0; |
| 1305 |
char *lbufp;
|
| 1306 |
size_t llen; |
| 1307 |
char buf[64]; |
| 1308 |
boolean_t verbose = flags & JSSTR_VERBOSE ? B_TRUE : B_FALSE; |
| 1309 |
|
| 1310 |
if (read_typebyte(&typebyte, addr) != 0) |
| 1311 |
return (0); |
| 1312 |
|
| 1313 |
if (!V8_TYPE_STRING(typebyte)) {
|
| 1314 |
(void) bsnprintf(bufp, lenp, "<not a string>"); |
| 1315 |
return (0); |
| 1316 |
} |
| 1317 |
|
| 1318 |
if (!V8_STRENC_ASCII(typebyte)) {
|
| 1319 |
(void) bsnprintf(bufp, lenp, "<two-byte string>"); |
| 1320 |
return (0); |
| 1321 |
} |
| 1322 |
|
| 1323 |
if (verbose) {
|
| 1324 |
lbufp = buf; |
| 1325 |
llen = sizeof (buf);
|
| 1326 |
(void) obj_jstype(addr, &lbufp, &llen, NULL); |
| 1327 |
mdb_printf("%s\n", buf);
|
| 1328 |
(void) mdb_inc_indent(4); |
| 1329 |
} |
| 1330 |
|
| 1331 |
if (V8_STRREP_SEQ(typebyte))
|
| 1332 |
err = jsstr_print_seq(addr, flags, bufp, lenp); |
| 1333 |
else if (V8_STRREP_CONS(typebyte)) |
| 1334 |
err = jsstr_print_cons(addr, flags, bufp, lenp); |
| 1335 |
else if (V8_STRREP_EXT(typebyte)) |
| 1336 |
err = jsstr_print_external(addr, flags, bufp, lenp); |
| 1337 |
else {
|
| 1338 |
(void) bsnprintf(bufp, lenp, "<unknown string type>"); |
| 1339 |
err = -1;
|
| 1340 |
} |
| 1341 |
|
| 1342 |
if (verbose)
|
| 1343 |
(void) mdb_dec_indent(4); |
| 1344 |
|
| 1345 |
return (err);
|
| 1346 |
} |
| 1347 |
|
| 1348 |
static int |
| 1349 |
jsstr_print_seq(uintptr_t addr, uint_t flags, char **bufp, size_t *lenp)
|
| 1350 |
{
|
| 1351 |
/*
|
| 1352 |
* To allow the caller to allocate a very large buffer for strings,
|
| 1353 |
* we'll allocate a buffer sized based on our input, making it at
|
| 1354 |
* least enough space for our ellipsis and at most 256K.
|
| 1355 |
*/
|
| 1356 |
uintptr_t len, rlen, blen = *lenp + sizeof ("[...]") + 1; |
| 1357 |
char *buf = alloca(MIN(blen, 256 * 1024)); |
| 1358 |
boolean_t verbose = flags & JSSTR_VERBOSE ? B_TRUE : B_FALSE; |
| 1359 |
boolean_t quoted = flags & JSSTR_QUOTED ? B_TRUE : B_FALSE; |
| 1360 |
|
| 1361 |
if (read_heap_smi(&len, addr, V8_OFF_STRING_LENGTH) != 0) |
| 1362 |
return (-1); |
| 1363 |
|
| 1364 |
rlen = len <= blen - 1 ? len : blen - sizeof ("[...]"); |
| 1365 |
|
| 1366 |
if (verbose)
|
| 1367 |
mdb_printf("length: %d, will read: %d\n", len, rlen);
|
| 1368 |
|
| 1369 |
buf[0] = '\0'; |
| 1370 |
|
| 1371 |
if (rlen > 0 && mdb_readstr(buf, rlen + 1, |
| 1372 |
addr + V8_OFF_SEQASCIISTR_CHARS) == -1) {
|
| 1373 |
v8_warn("failed to read SeqString data");
|
| 1374 |
return (-1); |
| 1375 |
} |
| 1376 |
|
| 1377 |
if (rlen != len)
|
| 1378 |
(void) strlcat(buf, "[...]", blen); |
| 1379 |
|
| 1380 |
if (verbose)
|
| 1381 |
mdb_printf("value: \"%s\"\n", buf);
|
| 1382 |
|
| 1383 |
(void) bsnprintf(bufp, lenp, "%s%s%s", |
| 1384 |
quoted ? "\"" : "", buf, quoted ? "\"" : ""); |
| 1385 |
|
| 1386 |
return (0); |
| 1387 |
} |
| 1388 |
|
| 1389 |
static int |
| 1390 |
jsstr_print_cons(uintptr_t addr, uint_t flags, char **bufp, size_t *lenp)
|
| 1391 |
{
|
| 1392 |
boolean_t verbose = flags & JSSTR_VERBOSE ? B_TRUE : B_FALSE; |
| 1393 |
boolean_t quoted = flags & JSSTR_QUOTED ? B_TRUE : B_FALSE; |
| 1394 |
uintptr_t ptr1, ptr2; |
| 1395 |
|
| 1396 |
if (read_heap_ptr(&ptr1, addr, V8_OFF_CONSSTRING_FIRST) != 0 || |
| 1397 |
read_heap_ptr(&ptr2, addr, V8_OFF_CONSSTRING_SECOND) != 0)
|
| 1398 |
return (-1); |
| 1399 |
|
| 1400 |
if (verbose) {
|
| 1401 |
mdb_printf("ptr1: %p\n", ptr1);
|
| 1402 |
mdb_printf("ptr2: %p\n", ptr2);
|
| 1403 |
} |
| 1404 |
|
| 1405 |
if (quoted)
|
| 1406 |
(void) bsnprintf(bufp, lenp, "\""); |
| 1407 |
|
| 1408 |
if (jsstr_print(ptr1, verbose, bufp, lenp) != 0) |
| 1409 |
return (-1); |
| 1410 |
|
| 1411 |
if (jsstr_print(ptr2, verbose, bufp, lenp) != 0) |
| 1412 |
return (-1); |
| 1413 |
|
| 1414 |
if (quoted)
|
| 1415 |
(void) bsnprintf(bufp, lenp, "\""); |
| 1416 |
|
| 1417 |
return (0); |
| 1418 |
} |
| 1419 |
|
| 1420 |
static int |
| 1421 |
jsstr_print_external(uintptr_t addr, uint_t flags, char **bufp,
|
| 1422 |
size_t *lenp) |
| 1423 |
{
|
| 1424 |
uintptr_t ptr1, ptr2; |
| 1425 |
size_t blen = *lenp + 1;
|
| 1426 |
char *buf = alloca(blen);
|
| 1427 |
boolean_t quoted = flags & JSSTR_QUOTED ? B_TRUE : B_FALSE; |
| 1428 |
|
| 1429 |
if (flags & JSSTR_VERBOSE)
|
| 1430 |
mdb_printf("assuming Node.js string\n");
|
| 1431 |
|
| 1432 |
if (read_heap_ptr(&ptr1, addr, V8_OFF_EXTERNALSTRING_RESOURCE) != 0) |
| 1433 |
return (-1); |
| 1434 |
|
| 1435 |
if (mdb_vread(&ptr2, sizeof (ptr2), |
| 1436 |
ptr1 + NODE_OFF_EXTSTR_DATA) == -1) {
|
| 1437 |
v8_warn("failed to read node external pointer: %p",
|
| 1438 |
ptr1 + NODE_OFF_EXTSTR_DATA); |
| 1439 |
return (-1); |
| 1440 |
} |
| 1441 |
|
| 1442 |
if (mdb_readstr(buf, blen, ptr2) == -1) { |
| 1443 |
v8_warn("failed to read ExternalString data");
|
| 1444 |
return (-1); |
| 1445 |
} |
| 1446 |
|
| 1447 |
if (buf[0] != '\0' && !isascii(buf[0])) { |
| 1448 |
v8_warn("failed to read ExternalString ascii data\n");
|
| 1449 |
return (-1); |
| 1450 |
} |
| 1451 |
|
| 1452 |
(void) bsnprintf(bufp, lenp, "%s%s%s", |
| 1453 |
quoted ? "\"" : "", buf, quoted ? "\"" : ""); |
| 1454 |
|
| 1455 |
return (0); |
| 1456 |
} |
| 1457 |
|
| 1458 |
/*
|
| 1459 |
* Returns true if the given address refers to the "undefined" object. Returns
|
| 1460 |
* false on failure (since we shouldn't fail on the actual "undefined" value).
|
| 1461 |
*/
|
| 1462 |
static boolean_t
|
| 1463 |
jsobj_is_undefined(uintptr_t addr) |
| 1464 |
{
|
| 1465 |
uint8_t type; |
| 1466 |
uintptr_t strptr; |
| 1467 |
const char *typename; |
| 1468 |
char buf[16]; |
| 1469 |
char *bufp = buf;
|
| 1470 |
size_t len = sizeof (buf);
|
| 1471 |
|
| 1472 |
v8_silent++; |
| 1473 |
|
| 1474 |
if (read_typebyte(&type, addr) != 0) { |
| 1475 |
v8_silent--; |
| 1476 |
return (B_FALSE);
|
| 1477 |
} |
| 1478 |
|
| 1479 |
v8_silent--; |
| 1480 |
|
| 1481 |
typename = enum_lookup_str(v8_types, type, "<unknown>");
|
| 1482 |
if (strcmp(typename, "Oddball") != 0) |
| 1483 |
return (B_FALSE);
|
| 1484 |
|
| 1485 |
if (read_heap_ptr(&strptr, addr, V8_OFF_ODDBALL_TO_STRING) == -1) |
| 1486 |
return (B_FALSE);
|
| 1487 |
|
| 1488 |
if (jsstr_print(strptr, JSSTR_NUDE, &bufp, &len) != 0) |
| 1489 |
return (B_FALSE);
|
| 1490 |
|
| 1491 |
return (strcmp(buf, "undefined") == 0); |
| 1492 |
} |
| 1493 |
|
| 1494 |
static int |
| 1495 |
jsobj_properties(uintptr_t addr, |
| 1496 |
int (*func)(const char *, uintptr_t, void *), void *arg) |
| 1497 |
{
|
| 1498 |
uintptr_t ptr, map; |
| 1499 |
uintptr_t *props = NULL, *descs = NULL, *content = NULL, *trans; |
| 1500 |
size_t size, nprops, ndescs, ncontent, ntrans; |
| 1501 |
ssize_t ii, rndescs; |
| 1502 |
uint8_t type, ninprops; |
| 1503 |
int rval = -1; |
| 1504 |
size_t ps = sizeof (uintptr_t);
|
| 1505 |
ssize_t off; |
| 1506 |
|
| 1507 |
/*
|
| 1508 |
* Objects have either "fast" properties represented with a FixedArray
|
| 1509 |
* or slow properties represented with a Dictionary.
|
| 1510 |
*/
|
| 1511 |
if (mdb_vread(&ptr, ps, addr + V8_OFF_JSOBJECT_PROPERTIES) == -1) |
| 1512 |
return (-1); |
| 1513 |
|
| 1514 |
if (read_typebyte(&type, ptr) != 0) |
| 1515 |
return (-1); |
| 1516 |
|
| 1517 |
if (type != V8_TYPE_FIXEDARRAY) {
|
| 1518 |
/*
|
| 1519 |
* If our properties aren't a fixed array, we'll emit a member
|
| 1520 |
* that contains the type name, but with a NULL value.
|
| 1521 |
*/
|
| 1522 |
char buf[256]; |
| 1523 |
|
| 1524 |
(void) mdb_snprintf(buf, sizeof (buf), "<%s>", |
| 1525 |
enum_lookup_str(v8_types, type, "unknown"));
|
| 1526 |
|
| 1527 |
return (func(buf, NULL, arg)); |
| 1528 |
} |
| 1529 |
|
| 1530 |
/*
|
| 1531 |
* To iterate the properties, we need to examine the instance
|
| 1532 |
* descriptors of the associated Map object. Depending on the version
|
| 1533 |
* of V8, this might be found directly from the map -- or indirectly
|
| 1534 |
* via the transitions array.
|
| 1535 |
*/
|
| 1536 |
if (mdb_vread(&map, ps, addr + V8_OFF_HEAPOBJECT_MAP) == -1) |
| 1537 |
goto err;
|
| 1538 |
|
| 1539 |
if (V8_DICT_SHIFT != -1) { |
| 1540 |
uintptr_t bit_field3; |
| 1541 |
|
| 1542 |
if (mdb_vread(&bit_field3, sizeof (bit_field3), |
| 1543 |
map + V8_OFF_MAP_BIT_FIELD3) == -1)
|
| 1544 |
goto err;
|
| 1545 |
|
| 1546 |
if (V8_SMI_VALUE(bit_field3) & (1 << V8_DICT_SHIFT)) |
| 1547 |
return (read_heap_dict(ptr, func, arg));
|
| 1548 |
} else if (V8_OFF_MAP_INSTANCE_DESCRIPTORS != -1) { |
| 1549 |
uintptr_t bit_field3; |
| 1550 |
|
| 1551 |
if (mdb_vread(&bit_field3, sizeof (bit_field3), |
| 1552 |
map + V8_OFF_MAP_INSTANCE_DESCRIPTORS) == -1)
|
| 1553 |
goto err;
|
| 1554 |
|
| 1555 |
if (V8_SMI_VALUE(bit_field3) == (1 << V8_ISSHARED_SHIFT)) { |
| 1556 |
/*
|
| 1557 |
* On versions of V8 prior to that used in 0.10,
|
| 1558 |
* the instance descriptors were overloaded to also
|
| 1559 |
* be bit_field3 -- and there was no way from that
|
| 1560 |
* field to infer a dictionary type. Because we
|
| 1561 |
* can't determine if the map is actually the
|
| 1562 |
* hash_table_map, we assume that if it's an object
|
| 1563 |
* that has kIsShared set, that it is in fact a
|
| 1564 |
* dictionary -- an assumption that is assuredly in
|
| 1565 |
* error in some cases.
|
| 1566 |
*/
|
| 1567 |
return (read_heap_dict(ptr, func, arg));
|
| 1568 |
} |
| 1569 |
} |
| 1570 |
|
| 1571 |
if (read_heap_array(ptr, &props, &nprops, UM_SLEEP) != 0) |
| 1572 |
goto err;
|
| 1573 |
|
| 1574 |
if ((off = V8_OFF_MAP_INSTANCE_DESCRIPTORS) == -1) { |
| 1575 |
if (V8_OFF_MAP_TRANSITIONS == -1 || |
| 1576 |
V8_TRANSITIONS_IDX_DESC == -1 ||
|
| 1577 |
V8_PROP_IDX_CONTENT != -1) {
|
| 1578 |
mdb_warn("missing instance_descriptors, but did "
|
| 1579 |
"not find expected transitions array metadata; "
|
| 1580 |
"cannot read properties\n");
|
| 1581 |
goto err;
|
| 1582 |
} |
| 1583 |
|
| 1584 |
off = V8_OFF_MAP_TRANSITIONS; |
| 1585 |
} |
| 1586 |
|
| 1587 |
if (mdb_vread(&ptr, ps, map + off) == -1) |
| 1588 |
goto err;
|
| 1589 |
|
| 1590 |
if (V8_OFF_MAP_INSTANCE_DESCRIPTORS == -1) { |
| 1591 |
if (read_heap_array(ptr, &trans, &ntrans, UM_SLEEP) != 0) |
| 1592 |
goto err;
|
| 1593 |
|
| 1594 |
ptr = trans[V8_TRANSITIONS_IDX_DESC]; |
| 1595 |
mdb_free(trans, ntrans * sizeof (uintptr_t));
|
| 1596 |
} |
| 1597 |
|
| 1598 |
if (read_heap_array(ptr, &descs, &ndescs, UM_SLEEP) != 0) |
| 1599 |
goto err;
|
| 1600 |
|
| 1601 |
if (read_size(&size, addr) != 0) |
| 1602 |
size = 0;
|
| 1603 |
|
| 1604 |
if (mdb_vread(&ninprops, 1, map + V8_OFF_MAP_INOBJECT_PROPERTIES) == -1) |
| 1605 |
goto err;
|
| 1606 |
|
| 1607 |
if (V8_PROP_IDX_CONTENT != -1 && V8_PROP_IDX_CONTENT < ndescs && |
| 1608 |
read_heap_array(descs[V8_PROP_IDX_CONTENT], &content, |
| 1609 |
&ncontent, UM_SLEEP) != 0)
|
| 1610 |
goto err;
|
| 1611 |
|
| 1612 |
if (V8_PROP_IDX_CONTENT == -1) { |
| 1613 |
/*
|
| 1614 |
* On node v0.8 and later, the content is not stored in an
|
| 1615 |
* orthogonal FixedArray, but rather with the descriptors.
|
| 1616 |
*/
|
| 1617 |
content = descs; |
| 1618 |
ncontent = ndescs; |
| 1619 |
rndescs = ndescs > V8_PROP_IDX_FIRST ? |
| 1620 |
(ndescs - V8_PROP_IDX_FIRST) / V8_PROP_DESC_SIZE : 0;
|
| 1621 |
} else {
|
| 1622 |
rndescs = ndescs - V8_PROP_IDX_FIRST; |
| 1623 |
} |
| 1624 |
|
| 1625 |
for (ii = 0; ii < rndescs; ii++) { |
| 1626 |
uintptr_t keyidx, validx, detidx, baseidx; |
| 1627 |
char buf[1024]; |
| 1628 |
intptr_t val; |
| 1629 |
size_t len = sizeof (buf);
|
| 1630 |
char *c = buf;
|
| 1631 |
|
| 1632 |
if (V8_PROP_IDX_CONTENT != -1) { |
| 1633 |
/*
|
| 1634 |
* In node versions prior to v0.8, this was hardcoded
|
| 1635 |
* in the V8 implementation, so we hardcode it here
|
| 1636 |
* as well.
|
| 1637 |
*/
|
| 1638 |
keyidx = ii + V8_PROP_IDX_FIRST; |
| 1639 |
validx = ii << 1;
|
| 1640 |
detidx = (ii << 1) + 1; |
| 1641 |
} else {
|
| 1642 |
baseidx = V8_PROP_IDX_FIRST + (ii * V8_PROP_DESC_SIZE); |
| 1643 |
keyidx = baseidx + V8_PROP_DESC_KEY; |
| 1644 |
validx = baseidx + V8_PROP_DESC_VALUE; |
| 1645 |
detidx = baseidx + V8_PROP_DESC_DETAILS; |
| 1646 |
} |
| 1647 |
|
| 1648 |
if (detidx >= ncontent) {
|
| 1649 |
v8_warn("property descriptor %d: detidx (%d) "
|
| 1650 |
"out of bounds for content array (length %d)\n",
|
| 1651 |
ii, detidx, ncontent); |
| 1652 |
continue;
|
| 1653 |
} |
| 1654 |
|
| 1655 |
if (!V8_DESC_ISFIELD(content[detidx]))
|
| 1656 |
continue;
|
| 1657 |
|
| 1658 |
if (keyidx >= ndescs) {
|
| 1659 |
v8_warn("property descriptor %d: keyidx (%d) "
|
| 1660 |
"out of bounds for descriptor array (length %d)\n",
|
| 1661 |
ii, keyidx, ndescs); |
| 1662 |
continue;
|
| 1663 |
} |
| 1664 |
|
| 1665 |
if (jsstr_print(descs[keyidx], JSSTR_NUDE, &c, &len) != 0) |
| 1666 |
continue;
|
| 1667 |
|
| 1668 |
val = (intptr_t)content[validx]; |
| 1669 |
|
| 1670 |
if (!V8_IS_SMI(val)) {
|
| 1671 |
v8_warn("object %p: property descriptor %d: value "
|
| 1672 |
"index value is not an SMI: %p\n", addr, ii, val);
|
| 1673 |
continue;
|
| 1674 |
} |
| 1675 |
|
| 1676 |
val = V8_SMI_VALUE(val) - ninprops; |
| 1677 |
|
| 1678 |
if (val < 0) { |
| 1679 |
/* property is stored directly in the object */
|
| 1680 |
if (mdb_vread(&ptr, sizeof (ptr), addr + V8_OFF_HEAP( |
| 1681 |
size + val * sizeof (uintptr_t))) == -1) { |
| 1682 |
v8_warn("failed to read in-object "
|
| 1683 |
"property at %p\n", addr + V8_OFF_HEAP(
|
| 1684 |
size + val * sizeof (uintptr_t)));
|
| 1685 |
continue;
|
| 1686 |
} |
| 1687 |
} else {
|
| 1688 |
/* property should be in "props" array */
|
| 1689 |
if (val >= nprops) {
|
| 1690 |
v8_warn("property descriptor %d: value index "
|
| 1691 |
"value (%d) out of bounds (%d)\n", ii, val,
|
| 1692 |
nprops); |
| 1693 |
continue;
|
| 1694 |
} |
| 1695 |
|
| 1696 |
ptr = props[val]; |
| 1697 |
} |
| 1698 |
|
| 1699 |
if (func(buf, ptr, arg) != 0) |
| 1700 |
goto err;
|
| 1701 |
} |
| 1702 |
|
| 1703 |
rval = 0;
|
| 1704 |
err:
|
| 1705 |
if (props != NULL) |
| 1706 |
mdb_free(props, nprops * sizeof (uintptr_t));
|
| 1707 |
|
| 1708 |
if (descs != NULL) |
| 1709 |
mdb_free(descs, ndescs * sizeof (uintptr_t));
|
| 1710 |
|
| 1711 |
if (content != NULL && V8_PROP_IDX_CONTENT != -1) |
| 1712 |
mdb_free(content, ncontent * sizeof (uintptr_t));
|
| 1713 |
|
| 1714 |
return (rval);
|
| 1715 |
} |
| 1716 |
|
| 1717 |
/*
|
| 1718 |
* Given the line endings table in "lendsp", computes the line number for the
|
| 1719 |
* given token position and print the result into "buf". If "lendsp" is
|
| 1720 |
* undefined, prints the token position instead.
|
| 1721 |
*/
|
| 1722 |
static int |
| 1723 |
jsfunc_lineno(uintptr_t lendsp, uintptr_t tokpos, char *buf, size_t buflen)
|
| 1724 |
{
|
| 1725 |
uintptr_t size, bufsz, lower, upper, ii = 0;
|
| 1726 |
uintptr_t *data; |
| 1727 |
|
| 1728 |
if (jsobj_is_undefined(lendsp)) {
|
| 1729 |
/*
|
| 1730 |
* The token position is an SMI, but it comes in as its raw
|
| 1731 |
* value so we can more easily compare it to values in the line
|
| 1732 |
* endings table. If we're just printing the position directly,
|
| 1733 |
* we must convert it here.
|
| 1734 |
*/
|
| 1735 |
mdb_snprintf(buf, buflen, "position %d", V8_SMI_VALUE(tokpos));
|
| 1736 |
return (0); |
| 1737 |
} |
| 1738 |
|
| 1739 |
if (read_heap_smi(&size, lendsp, V8_OFF_FIXEDARRAY_LENGTH) != 0) |
| 1740 |
return (-1); |
| 1741 |
|
| 1742 |
bufsz = size * sizeof (data[0]); |
| 1743 |
|
| 1744 |
if ((data = mdb_alloc(bufsz, UM_NOSLEEP)) == NULL) { |
| 1745 |
v8_warn("failed to alloc %d bytes for FixedArray data", bufsz);
|
| 1746 |
return (-1); |
| 1747 |
} |
| 1748 |
|
| 1749 |
if (mdb_vread(data, bufsz, lendsp + V8_OFF_FIXEDARRAY_DATA) != bufsz) {
|
| 1750 |
v8_warn("failed to read FixedArray data");
|
| 1751 |
mdb_free(data, bufsz); |
| 1752 |
return (-1); |
| 1753 |
} |
| 1754 |
|
| 1755 |
lower = 0;
|
| 1756 |
upper = size - 1;
|
| 1757 |
|
| 1758 |
if (tokpos > data[upper]) {
|
| 1759 |
(void) strlcpy(buf, "position out of range", buflen); |
| 1760 |
mdb_free(data, bufsz); |
| 1761 |
return (0); |
| 1762 |
} |
| 1763 |
|
| 1764 |
if (tokpos <= data[0]) { |
| 1765 |
(void) strlcpy(buf, "line 1", buflen); |
| 1766 |
mdb_free(data, bufsz); |
| 1767 |
return (0); |
| 1768 |
} |
| 1769 |
|
| 1770 |
while (upper >= 1) { |
| 1771 |
ii = (lower + upper) >> 1;
|
| 1772 |
if (tokpos > data[ii])
|
| 1773 |
lower = ii + 1;
|
| 1774 |
else if (tokpos <= data[ii - 1]) |
| 1775 |
upper = ii - 1;
|
| 1776 |
else
|
| 1777 |
break;
|
| 1778 |
} |
| 1779 |
|
| 1780 |
(void) mdb_snprintf(buf, buflen, "line %d", ii + 1); |
| 1781 |
mdb_free(data, bufsz); |
| 1782 |
return (0); |
| 1783 |
} |
| 1784 |
|
| 1785 |
/*
|
| 1786 |
* Given a SharedFunctionInfo object, prints into bufp a name of the function
|
| 1787 |
* suitable for printing. This function attempts to infer a name for anonymous
|
| 1788 |
* functions.
|
| 1789 |
*/
|
| 1790 |
static int |
| 1791 |
jsfunc_name(uintptr_t funcinfop, char **bufp, size_t *lenp)
|
| 1792 |
{
|
| 1793 |
uintptr_t ptrp; |
| 1794 |
char *bufs = *bufp;
|
| 1795 |
|
| 1796 |
if (read_heap_ptr(&ptrp, funcinfop,
|
| 1797 |
V8_OFF_SHAREDFUNCTIONINFO_NAME) != 0 ||
|
| 1798 |
jsstr_print(ptrp, JSSTR_NUDE, bufp, lenp) != 0)
|
| 1799 |
return (-1); |
| 1800 |
|
| 1801 |
if (*bufp != bufs)
|
| 1802 |
return (0); |
| 1803 |
|
| 1804 |
if (read_heap_ptr(&ptrp, funcinfop,
|
| 1805 |
V8_OFF_SHAREDFUNCTIONINFO_INFERRED_NAME) != 0) {
|
| 1806 |
(void) bsnprintf(bufp, lenp, "<anonymous>"); |
| 1807 |
return (0); |
| 1808 |
} |
| 1809 |
|
| 1810 |
(void) bsnprintf(bufp, lenp, "<anonymous> (as "); |
| 1811 |
bufs = *bufp; |
| 1812 |
|
| 1813 |
if (jsstr_print(ptrp, JSSTR_NUDE, bufp, lenp) != 0) |
| 1814 |
return (-1); |
| 1815 |
|
| 1816 |
if (*bufp == bufs)
|
| 1817 |
(void) bsnprintf(bufp, lenp, "<anon>"); |
| 1818 |
|
| 1819 |
(void) bsnprintf(bufp, lenp, ")"); |
| 1820 |
|
| 1821 |
return (0); |
| 1822 |
} |
| 1823 |
|
| 1824 |
/*
|
| 1825 |
* JavaScript-level object printing
|
| 1826 |
*/
|
| 1827 |
typedef struct jsobj_print { |
| 1828 |
char **jsop_bufp;
|
| 1829 |
size_t *jsop_lenp; |
| 1830 |
int jsop_indent;
|
| 1831 |
uint64_t jsop_depth; |
| 1832 |
boolean_t jsop_printaddr; |
| 1833 |
uintptr_t jsop_baseaddr; |
| 1834 |
int jsop_nprops;
|
| 1835 |
const char *jsop_member; |
| 1836 |
boolean_t jsop_found; |
| 1837 |
} jsobj_print_t; |
| 1838 |
|
| 1839 |
static int jsobj_print_number(uintptr_t, jsobj_print_t *); |
| 1840 |
static int jsobj_print_oddball(uintptr_t, jsobj_print_t *); |
| 1841 |
static int jsobj_print_jsobject(uintptr_t, jsobj_print_t *); |
| 1842 |
static int jsobj_print_jsarray(uintptr_t, jsobj_print_t *); |
| 1843 |
static int jsobj_print_jsfunction(uintptr_t, jsobj_print_t *); |
| 1844 |
static int jsobj_print_jsdate(uintptr_t, jsobj_print_t *); |
| 1845 |
|
| 1846 |
static int |
| 1847 |
jsobj_print(uintptr_t addr, jsobj_print_t *jsop) |
| 1848 |
{
|
| 1849 |
uint8_t type; |
| 1850 |
const char *klass; |
| 1851 |
char **bufp = jsop->jsop_bufp;
|
| 1852 |
size_t *lenp = jsop->jsop_lenp; |
| 1853 |
|
| 1854 |
const struct { |
| 1855 |
char *name;
|
| 1856 |
int (*func)(uintptr_t, jsobj_print_t *);
|
| 1857 |
} table[] = {
|
| 1858 |
{ "HeapNumber", jsobj_print_number },
|
| 1859 |
{ "Oddball", jsobj_print_oddball },
|
| 1860 |
{ "JSObject", jsobj_print_jsobject },
|
| 1861 |
{ "JSArray", jsobj_print_jsarray },
|
| 1862 |
{ "JSFunction", jsobj_print_jsfunction },
|
| 1863 |
{ "JSDate", jsobj_print_jsdate },
|
| 1864 |
{ NULL }
|
| 1865 |
}, *ent; |
| 1866 |
|
| 1867 |
if (jsop->jsop_baseaddr != NULL && jsop->jsop_member == NULL) |
| 1868 |
(void) bsnprintf(bufp, lenp, "%p: ", jsop->jsop_baseaddr); |
| 1869 |
|
| 1870 |
if (jsop->jsop_printaddr && jsop->jsop_member == NULL) |
| 1871 |
(void) bsnprintf(bufp, lenp, "%p: ", addr); |
| 1872 |
|
| 1873 |
if (V8_IS_SMI(addr)) {
|
| 1874 |
(void) bsnprintf(bufp, lenp, "%d", V8_SMI_VALUE(addr)); |
| 1875 |
return (0); |
| 1876 |
} |
| 1877 |
|
| 1878 |
if (!V8_IS_HEAPOBJECT(addr)) {
|
| 1879 |
v8_warn("not a heap object: %p\n", addr);
|
| 1880 |
return (-1); |
| 1881 |
} |
| 1882 |
|
| 1883 |
if (read_typebyte(&type, addr) != 0) |
| 1884 |
return (-1); |
| 1885 |
|
| 1886 |
if (V8_TYPE_STRING(type)) {
|
| 1887 |
if (jsstr_print(addr, JSSTR_QUOTED, bufp, lenp) == -1) |
| 1888 |
return (-1); |
| 1889 |
|
| 1890 |
return (0); |
| 1891 |
} |
| 1892 |
|
| 1893 |
klass = enum_lookup_str(v8_types, type, "<unknown>");
|
| 1894 |
|
| 1895 |
for (ent = &table[0]; ent->name != NULL; ent++) { |
| 1896 |
if (strcmp(klass, ent->name) == 0) |
| 1897 |
return (ent->func(addr, jsop));
|
| 1898 |
} |
| 1899 |
|
| 1900 |
v8_warn("%p: unknown JavaScript object type \"%s\"\n", addr, klass);
|
| 1901 |
return (-1); |
| 1902 |
} |
| 1903 |
|
| 1904 |
static int |
| 1905 |
jsobj_print_number(uintptr_t addr, jsobj_print_t *jsop) |
| 1906 |
{
|
| 1907 |
char **bufp = jsop->jsop_bufp;
|
| 1908 |
size_t *lenp = jsop->jsop_lenp; |
| 1909 |
double numval;
|
| 1910 |
|
| 1911 |
if (read_heap_double(&numval, addr, V8_OFF_HEAPNUMBER_VALUE) == -1) |
| 1912 |
return (-1); |
| 1913 |
|
| 1914 |
if (numval == (long long)numval) |
| 1915 |
(void) bsnprintf(bufp, lenp, "%lld", (long long)numval); |
| 1916 |
else
|
| 1917 |
(void) bsnprintf(bufp, lenp, "%e", numval); |
| 1918 |
|
| 1919 |
return (0); |
| 1920 |
} |
| 1921 |
|
| 1922 |
static int |
| 1923 |
jsobj_print_oddball(uintptr_t addr, jsobj_print_t *jsop) |
| 1924 |
{
|
| 1925 |
char **bufp = jsop->jsop_bufp;
|
| 1926 |
size_t *lenp = jsop->jsop_lenp; |
| 1927 |
uintptr_t strptr; |
| 1928 |
|
| 1929 |
if (read_heap_ptr(&strptr, addr, V8_OFF_ODDBALL_TO_STRING) != 0) |
| 1930 |
return (-1); |
| 1931 |
|
| 1932 |
return (jsstr_print(strptr, JSSTR_NUDE, bufp, lenp));
|
| 1933 |
} |
| 1934 |
|
| 1935 |
static int |
| 1936 |
jsobj_print_prop(const char *desc, uintptr_t val, void *arg) |
| 1937 |
{
|
| 1938 |
jsobj_print_t *jsop = arg, descend; |
| 1939 |
char **bufp = jsop->jsop_bufp;
|
| 1940 |
size_t *lenp = jsop->jsop_lenp; |
| 1941 |
|
| 1942 |
(void) bsnprintf(bufp, lenp, "%s\n%*s%s: ", jsop->jsop_nprops == 0 ? |
| 1943 |
"{" : "", jsop->jsop_indent + 4, "", desc); |
| 1944 |
|
| 1945 |
descend = *jsop; |
| 1946 |
descend.jsop_depth--; |
| 1947 |
descend.jsop_indent += 4;
|
| 1948 |
|
| 1949 |
(void) jsobj_print(val, &descend);
|
| 1950 |
(void) bsnprintf(bufp, lenp, ","); |
| 1951 |
|
| 1952 |
jsop->jsop_nprops++; |
| 1953 |
|
| 1954 |
return (0); |
| 1955 |
} |
| 1956 |
|
| 1957 |
static int |
| 1958 |
jsobj_print_prop_member(const char *desc, uintptr_t val, void *arg) |
| 1959 |
{
|
| 1960 |
jsobj_print_t *jsop = arg, descend; |
| 1961 |
const char *member = jsop->jsop_member, *next = member; |
| 1962 |
int rv;
|
| 1963 |
|
| 1964 |
for (; *next != '\0' && *next != '.' && *next != '['; next++) |
| 1965 |
continue;
|
| 1966 |
|
| 1967 |
if (*member == '[') { |
| 1968 |
mdb_warn("cannot use array indexing on an object\n");
|
| 1969 |
return (-1); |
| 1970 |
} |
| 1971 |
|
| 1972 |
if (strncmp(member, desc, next - member) != 0) |
| 1973 |
return (0); |
| 1974 |
|
| 1975 |
if (desc[next - member] != '\0') |
| 1976 |
return (0); |
| 1977 |
|
| 1978 |
/*
|
| 1979 |
* This property matches the desired member; descend.
|
| 1980 |
*/
|
| 1981 |
descend = *jsop; |
| 1982 |
|
| 1983 |
if (*next == '\0') { |
| 1984 |
descend.jsop_member = NULL;
|
| 1985 |
descend.jsop_found = B_TRUE; |
| 1986 |
} else {
|
| 1987 |
descend.jsop_member = *next == '.' ? next + 1 : next; |
| 1988 |
} |
| 1989 |
|
| 1990 |
rv = jsobj_print(val, &descend); |
| 1991 |
jsop->jsop_found = descend.jsop_found; |
| 1992 |
|
| 1993 |
return (rv);
|
| 1994 |
} |
| 1995 |
|
| 1996 |
static int |
| 1997 |
jsobj_print_jsobject(uintptr_t addr, jsobj_print_t *jsop) |
| 1998 |
{
|
| 1999 |
char **bufp = jsop->jsop_bufp;
|
| 2000 |
size_t *lenp = jsop->jsop_lenp; |
| 2001 |
|
| 2002 |
if (jsop->jsop_member != NULL) |
| 2003 |
return (jsobj_properties(addr, jsobj_print_prop_member, jsop));
|
| 2004 |
|
| 2005 |
if (jsop->jsop_depth == 0) { |
| 2006 |
(void) bsnprintf(bufp, lenp, "[...]"); |
| 2007 |
return (0); |
| 2008 |
} |
| 2009 |
|
| 2010 |
jsop->jsop_nprops = 0;
|
| 2011 |
|
| 2012 |
if (jsobj_properties(addr, jsobj_print_prop, jsop) != 0) |
| 2013 |
return (-1); |
| 2014 |
|
| 2015 |
if (jsop->jsop_nprops > 0) { |
| 2016 |
(void) bsnprintf(bufp, lenp, "\n%*s", jsop->jsop_indent, ""); |
| 2017 |
} else if (jsop->jsop_nprops == 0) { |
| 2018 |
(void) bsnprintf(bufp, lenp, "{"); |
| 2019 |
} else {
|
| 2020 |
(void) bsnprintf(bufp, lenp, "{ /* unknown property */ "); |
| 2021 |
} |
| 2022 |
|
| 2023 |
(void) bsnprintf(bufp, lenp, "}"); |
| 2024 |
|
| 2025 |
return (0); |
| 2026 |
} |
| 2027 |
|
| 2028 |
static int |
| 2029 |
jsobj_print_jsarray_member(uintptr_t addr, jsobj_print_t *jsop) |
| 2030 |
{
|
| 2031 |
uintptr_t *elts; |
| 2032 |
jsobj_print_t descend; |
| 2033 |
uintptr_t ptr; |
| 2034 |
const char *member = jsop->jsop_member, *end, *p; |
| 2035 |
size_t elt = 0, place = 1, len, rv; |
| 2036 |
|
| 2037 |
if (read_heap_ptr(&ptr, addr, V8_OFF_JSOBJECT_ELEMENTS) != 0 || |
| 2038 |
read_heap_array(ptr, &elts, &len, UM_SLEEP | UM_GC) != 0)
|
| 2039 |
return (-1); |
| 2040 |
|
| 2041 |
if (*member != '[') { |
| 2042 |
mdb_warn("expected bracketed array index; "
|
| 2043 |
"found '%s'\n", member);
|
| 2044 |
return (-1); |
| 2045 |
} |
| 2046 |
|
| 2047 |
if ((end = strchr(member, ']')) == NULL) { |
| 2048 |
mdb_warn("missing array index terminator\n");
|
| 2049 |
return (-1); |
| 2050 |
} |
| 2051 |
|
| 2052 |
/*
|
| 2053 |
* We know where our array index ends; convert it to an integer
|
| 2054 |
* by stepping through it from least significant digit to most.
|
| 2055 |
*/
|
| 2056 |
for (p = end - 1; p > member; p--) { |
| 2057 |
if (*p < '0' || *p > '9') { |
| 2058 |
mdb_warn("illegal array index at '%c'\n", *p);
|
| 2059 |
return (-1); |
| 2060 |
} |
| 2061 |
|
| 2062 |
elt += (*p - '0') * place;
|
| 2063 |
place *= 10;
|
| 2064 |
} |
| 2065 |
|
| 2066 |
if (place == 1) { |
| 2067 |
mdb_warn("missing array index\n");
|
| 2068 |
return (-1); |
| 2069 |
} |
| 2070 |
|
| 2071 |
if (elt >= len) {
|
| 2072 |
mdb_warn("array index %d exceeds size of %d\n", elt, len);
|
| 2073 |
return (-1); |
| 2074 |
} |
| 2075 |
|
| 2076 |
descend = *jsop; |
| 2077 |
|
| 2078 |
switch (*(++end)) {
|
| 2079 |
case '\0': |
| 2080 |
descend.jsop_member = NULL;
|
| 2081 |
descend.jsop_found = B_TRUE; |
| 2082 |
break;
|
| 2083 |
|
| 2084 |
case '.': |
| 2085 |
descend.jsop_member = end + 1;
|
| 2086 |
break;
|
| 2087 |
|
| 2088 |
case '[': |
| 2089 |
descend.jsop_member = end; |
| 2090 |
break;
|
| 2091 |
|
| 2092 |
default:
|
| 2093 |
mdb_warn("illegal character '%c' following "
|
| 2094 |
"array index terminator\n", *end);
|
| 2095 |
return (-1); |
| 2096 |
} |
| 2097 |
|
| 2098 |
rv = jsobj_print(elts[elt], &descend); |
| 2099 |
jsop->jsop_found = descend.jsop_found; |
| 2100 |
|
| 2101 |
return (rv);
|
| 2102 |
} |
| 2103 |
|
| 2104 |
static int |
| 2105 |
jsobj_print_jsarray(uintptr_t addr, jsobj_print_t *jsop) |
| 2106 |
{
|
| 2107 |
char **bufp = jsop->jsop_bufp;
|
| 2108 |
size_t *lenp = jsop->jsop_lenp; |
| 2109 |
int indent = jsop->jsop_indent;
|
| 2110 |
jsobj_print_t descend; |
| 2111 |
uintptr_t ptr; |
| 2112 |
uintptr_t *elts; |
| 2113 |
size_t ii, len; |
| 2114 |
|
| 2115 |
if (jsop->jsop_member != NULL) |
| 2116 |
return (jsobj_print_jsarray_member(addr, jsop));
|
| 2117 |
|
| 2118 |
if (jsop->jsop_depth == 0) { |
| 2119 |
(void) bsnprintf(bufp, lenp, "[...]"); |
| 2120 |
return (0); |
| 2121 |
} |
| 2122 |
|
| 2123 |
if (read_heap_ptr(&ptr, addr, V8_OFF_JSOBJECT_ELEMENTS) != 0 || |
| 2124 |
read_heap_array(ptr, &elts, &len, UM_SLEEP | UM_GC) != 0)
|
| 2125 |
return (-1); |
| 2126 |
|
| 2127 |
if (len == 0) { |
| 2128 |
(void) bsnprintf(bufp, lenp, "[]"); |
| 2129 |
return (0); |
| 2130 |
} |
| 2131 |
|
| 2132 |
descend = *jsop; |
| 2133 |
descend.jsop_depth--; |
| 2134 |
descend.jsop_indent += 4;
|
| 2135 |
|
| 2136 |
if (len == 1) { |
| 2137 |
(void) bsnprintf(bufp, lenp, "[ "); |
| 2138 |
(void) jsobj_print(elts[0], &descend); |
| 2139 |
(void) bsnprintf(bufp, lenp, " ]"); |
| 2140 |
return (0); |
| 2141 |
} |
| 2142 |
|
| 2143 |
(void) bsnprintf(bufp, lenp, "[\n"); |
| 2144 |
|
| 2145 |
for (ii = 0; ii < len; ii++) { |
| 2146 |
(void) bsnprintf(bufp, lenp, "%*s", indent + 4, ""); |
| 2147 |
(void) jsobj_print(elts[ii], &descend);
|
| 2148 |
(void) bsnprintf(bufp, lenp, ",\n"); |
| 2149 |
} |
| 2150 |
|
| 2151 |
(void) bsnprintf(bufp, lenp, "%*s", indent, ""); |
| 2152 |
(void) bsnprintf(bufp, lenp, "]"); |
| 2153 |
|
| 2154 |
return (0); |
| 2155 |
} |
| 2156 |
|
| 2157 |
static int |
| 2158 |
jsobj_print_jsfunction(uintptr_t addr, jsobj_print_t *jsop) |
| 2159 |
{
|
| 2160 |
char **bufp = jsop->jsop_bufp;
|
| 2161 |
size_t *lenp = jsop->jsop_lenp; |
| 2162 |
uintptr_t shared; |
| 2163 |
|
| 2164 |
if (read_heap_ptr(&shared, addr, V8_OFF_JSFUNCTION_SHARED) != 0) |
| 2165 |
return (-1); |
| 2166 |
|
| 2167 |
(void) bsnprintf(bufp, lenp, "function "); |
| 2168 |
return (jsfunc_name(shared, bufp, lenp) != 0); |
| 2169 |
} |
| 2170 |
|
| 2171 |
static int |
| 2172 |
jsobj_print_jsdate(uintptr_t addr, jsobj_print_t *jsop) |
| 2173 |
{
|
| 2174 |
char **bufp = jsop->jsop_bufp;
|
| 2175 |
size_t *lenp = jsop->jsop_lenp; |
| 2176 |
char buf[128]; |
| 2177 |
uintptr_t value; |
| 2178 |
uint8_t type; |
| 2179 |
double numval;
|
| 2180 |
|
| 2181 |
if (V8_OFF_JSDATE_VALUE == -1) { |
| 2182 |
(void) bsnprintf(bufp, lenp, "<JSDate>", buf); |
| 2183 |
return (0); |
| 2184 |
} |
| 2185 |
|
| 2186 |
if (read_heap_ptr(&value, addr, V8_OFF_JSDATE_VALUE) != 0) |
| 2187 |
return (-1); |
| 2188 |
|
| 2189 |
if (read_typebyte(&type, value) != 0) |
| 2190 |
return (-1); |
| 2191 |
|
| 2192 |
if (strcmp(enum_lookup_str(v8_types, type, ""), "HeapNumber") != 0) |
| 2193 |
return (-1); |
| 2194 |
|
| 2195 |
if (read_heap_double(&numval, value, V8_OFF_HEAPNUMBER_VALUE) == -1) |
| 2196 |
return (-1); |
| 2197 |
|
| 2198 |
mdb_snprintf(buf, sizeof (buf), "%Y", |
| 2199 |
(time_t)((long long)numval / MILLISEC)); |
| 2200 |
(void) bsnprintf(bufp, lenp, "%lld (%s)", (long long)numval, buf); |
| 2201 |
|
| 2202 |
return (0); |
| 2203 |
} |
| 2204 |
|
| 2205 |
/*
|
| 2206 |
* dcmd implementations
|
| 2207 |
*/
|
| 2208 |
|
| 2209 |
/* ARGSUSED */
|
| 2210 |
static int |
| 2211 |
dcmd_v8classes(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2212 |
{
|
| 2213 |
v8_class_t *clp; |
| 2214 |
|
| 2215 |
for (clp = v8_classes; clp != NULL; clp = clp->v8c_next) |
| 2216 |
mdb_printf("%s\n", clp->v8c_name);
|
| 2217 |
|
| 2218 |
return (DCMD_OK);
|
| 2219 |
} |
| 2220 |
|
| 2221 |
static int |
| 2222 |
do_v8code(uintptr_t addr, boolean_t opt_d) |
| 2223 |
{
|
| 2224 |
uintptr_t instrlen; |
| 2225 |
ssize_t instroff = V8_OFF_CODE_INSTRUCTION_START; |
| 2226 |
|
| 2227 |
if (read_heap_ptr(&instrlen, addr, V8_OFF_CODE_INSTRUCTION_SIZE) != 0) |
| 2228 |
return (DCMD_ERR);
|
| 2229 |
|
| 2230 |
mdb_printf("code: %p\n", addr);
|
| 2231 |
mdb_printf("instructions: [%p, %p)\n", addr + instroff,
|
| 2232 |
addr + instroff + instrlen); |
| 2233 |
|
| 2234 |
if (!opt_d)
|
| 2235 |
return (DCMD_OK);
|
| 2236 |
|
| 2237 |
mdb_set_dot(addr + instroff); |
| 2238 |
|
| 2239 |
do {
|
| 2240 |
(void) mdb_inc_indent(8); /* gets reset by mdb_eval() */ |
| 2241 |
|
| 2242 |
/*
|
| 2243 |
* This is absolutely awful. We want to disassemble the above
|
| 2244 |
* range of instructions. Because we don't know how many there
|
| 2245 |
* are, we can't use "::dis". We resort to evaluating "./i",
|
| 2246 |
* but then we need to advance "." by the size of the
|
| 2247 |
* instruction just printed. The only way to do that is by
|
| 2248 |
* printing out "+", but we don't want that to show up, so we
|
| 2249 |
* redirect it to /dev/null.
|
| 2250 |
*/
|
| 2251 |
if (mdb_eval("/i") != 0 || |
| 2252 |
mdb_eval("+=p ! cat > /dev/null") != 0) { |
| 2253 |
(void) mdb_dec_indent(8); |
| 2254 |
v8_warn("failed to disassemble at %p", mdb_get_dot());
|
| 2255 |
return (DCMD_ERR);
|
| 2256 |
} |
| 2257 |
} while (mdb_get_dot() < addr + instroff + instrlen);
|
| 2258 |
|
| 2259 |
(void) mdb_dec_indent(8); |
| 2260 |
return (DCMD_OK);
|
| 2261 |
} |
| 2262 |
|
| 2263 |
/* ARGSUSED */
|
| 2264 |
static int |
| 2265 |
dcmd_v8code(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2266 |
{
|
| 2267 |
boolean_t opt_d = B_FALSE; |
| 2268 |
|
| 2269 |
if (mdb_getopts(argc, argv, 'd', MDB_OPT_SETBITS, B_TRUE, &opt_d, |
| 2270 |
NULL) != argc)
|
| 2271 |
return (DCMD_USAGE);
|
| 2272 |
|
| 2273 |
return (do_v8code(addr, opt_d));
|
| 2274 |
} |
| 2275 |
|
| 2276 |
/* ARGSUSED */
|
| 2277 |
static int |
| 2278 |
dcmd_v8function(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2279 |
{
|
| 2280 |
uint8_t type; |
| 2281 |
uintptr_t funcinfop, scriptp, lendsp, tokpos, namep, codep; |
| 2282 |
char *bufp;
|
| 2283 |
size_t len; |
| 2284 |
boolean_t opt_d = B_FALSE; |
| 2285 |
char buf[512]; |
| 2286 |
|
| 2287 |
if (mdb_getopts(argc, argv, 'd', MDB_OPT_SETBITS, B_TRUE, &opt_d, |
| 2288 |
NULL) != argc)
|
| 2289 |
return (DCMD_USAGE);
|
| 2290 |
|
| 2291 |
if (read_typebyte(&type, addr) != 0) |
| 2292 |
return (DCMD_ERR);
|
| 2293 |
|
| 2294 |
if (strcmp(enum_lookup_str(v8_types, type, ""), "JSFunction") != 0) { |
| 2295 |
v8_warn("%p is not an instance of JSFunction\n", addr);
|
| 2296 |
return (DCMD_ERR);
|
| 2297 |
} |
| 2298 |
|
| 2299 |
if (read_heap_ptr(&funcinfop, addr, V8_OFF_JSFUNCTION_SHARED) != 0 || |
| 2300 |
read_heap_ptr(&tokpos, funcinfop, |
| 2301 |
V8_OFF_SHAREDFUNCTIONINFO_FUNCTION_TOKEN_POSITION) != 0 ||
|
| 2302 |
read_heap_ptr(&scriptp, funcinfop, |
| 2303 |
V8_OFF_SHAREDFUNCTIONINFO_SCRIPT) != 0 ||
|
| 2304 |
read_heap_ptr(&namep, scriptp, V8_OFF_SCRIPT_NAME) != 0 ||
|
| 2305 |
read_heap_ptr(&lendsp, scriptp, V8_OFF_SCRIPT_LINE_ENDS) != 0)
|
| 2306 |
return (DCMD_ERR);
|
| 2307 |
|
| 2308 |
bufp = buf; |
| 2309 |
len = sizeof (buf);
|
| 2310 |
if (jsfunc_name(funcinfop, &bufp, &len) != 0) |
| 2311 |
return (DCMD_ERR);
|
| 2312 |
|
| 2313 |
mdb_printf("%p: JSFunction: %s\n", addr, buf);
|
| 2314 |
|
| 2315 |
bufp = buf; |
| 2316 |
len = sizeof (buf);
|
| 2317 |
mdb_printf("defined at ");
|
| 2318 |
|
| 2319 |
if (jsstr_print(namep, JSSTR_NUDE, &bufp, &len) == 0) |
| 2320 |
mdb_printf("%s ", buf);
|
| 2321 |
|
| 2322 |
if (jsfunc_lineno(lendsp, tokpos, buf, sizeof (buf)) == 0) |
| 2323 |
mdb_printf("%s", buf);
|
| 2324 |
|
| 2325 |
mdb_printf("\n");
|
| 2326 |
|
| 2327 |
if (read_heap_ptr(&codep,
|
| 2328 |
funcinfop, V8_OFF_SHAREDFUNCTIONINFO_CODE) != 0)
|
| 2329 |
return (DCMD_ERR);
|
| 2330 |
|
| 2331 |
return (do_v8code(codep, opt_d));
|
| 2332 |
} |
| 2333 |
|
| 2334 |
/* ARGSUSED */
|
| 2335 |
static int |
| 2336 |
dcmd_v8frametypes(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2337 |
{
|
| 2338 |
enum_print(v8_frametypes); |
| 2339 |
return (DCMD_OK);
|
| 2340 |
} |
| 2341 |
|
| 2342 |
static void |
| 2343 |
dcmd_v8print_help(void)
|
| 2344 |
{
|
| 2345 |
mdb_printf( |
| 2346 |
"Prints out \".\" (a V8 heap object) as an instance of its C++\n"
|
| 2347 |
"class. With no arguments, the appropriate class is detected\n"
|
| 2348 |
"automatically. The 'class' argument overrides this to print an\n"
|
| 2349 |
"object as an instance of the given class. The list of known\n"
|
| 2350 |
"classes can be viewed with ::jsclasses.");
|
| 2351 |
} |
| 2352 |
|
| 2353 |
/* ARGSUSED */
|
| 2354 |
static int |
| 2355 |
dcmd_v8print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2356 |
{
|
| 2357 |
const char *rqclass; |
| 2358 |
v8_class_t *clp; |
| 2359 |
char *bufp;
|
| 2360 |
size_t len; |
| 2361 |
uint8_t type; |
| 2362 |
char buf[256]; |
| 2363 |
|
| 2364 |
if (argc < 1) { |
| 2365 |
/*
|
| 2366 |
* If no type was specified, determine it automatically.
|
| 2367 |
*/
|
| 2368 |
bufp = buf; |
| 2369 |
len = sizeof (buf);
|
| 2370 |
if (obj_jstype(addr, &bufp, &len, &type) != 0) |
| 2371 |
return (DCMD_ERR);
|
| 2372 |
|
| 2373 |
if (type == 0) { |
| 2374 |
/* For SMI or Failure, just print out the type. */
|
| 2375 |
mdb_printf("%s\n", buf);
|
| 2376 |
return (DCMD_OK);
|
| 2377 |
} |
| 2378 |
|
| 2379 |
if ((rqclass = enum_lookup_str(v8_types, type, NULL)) == NULL) { |
| 2380 |
v8_warn("object has unknown type\n");
|
| 2381 |
return (DCMD_ERR);
|
| 2382 |
} |
| 2383 |
} else {
|
| 2384 |
if (argv[0].a_type != MDB_TYPE_STRING) |
| 2385 |
return (DCMD_USAGE);
|
| 2386 |
|
| 2387 |
rqclass = argv[0].a_un.a_str;
|
| 2388 |
} |
| 2389 |
|
| 2390 |
for (clp = v8_classes; clp != NULL; clp = clp->v8c_next) { |
| 2391 |
if (strcmp(rqclass, clp->v8c_name) == 0) |
| 2392 |
break;
|
| 2393 |
} |
| 2394 |
|
| 2395 |
if (clp == NULL) { |
| 2396 |
v8_warn("unknown class '%s'\n", rqclass);
|
| 2397 |
return (DCMD_USAGE);
|
| 2398 |
} |
| 2399 |
|
| 2400 |
return (obj_print_class(addr, clp));
|
| 2401 |
} |
| 2402 |
|
| 2403 |
/* ARGSUSED */
|
| 2404 |
static int |
| 2405 |
dcmd_v8type(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2406 |
{
|
| 2407 |
char buf[64]; |
| 2408 |
char *bufp = buf;
|
| 2409 |
size_t len = sizeof (buf);
|
| 2410 |
|
| 2411 |
if (obj_jstype(addr, &bufp, &len, NULL) != 0) |
| 2412 |
return (DCMD_ERR);
|
| 2413 |
|
| 2414 |
mdb_printf("0x%p: %s\n", addr, buf);
|
| 2415 |
return (DCMD_OK);
|
| 2416 |
} |
| 2417 |
|
| 2418 |
/* ARGSUSED */
|
| 2419 |
static int |
| 2420 |
dcmd_v8types(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 2421 |
{
|
| 2422 |
enum_print(v8_types); |
| 2423 |
return (DCMD_OK);
|
| 2424 |
} |
| 2425 |
|
| 2426 |
static int |
| 2427 |
load_current_context(uintptr_t *fpp, uintptr_t *raddrp) |
| 2428 |
{
|
| 2429 |
mdb_reg_t regfp, regip; |
| 2430 |
|
| 2431 |
#ifdef __amd64
|
| 2432 |
if (mdb_getareg(1, "rbp", ®fp) != 0 || |
| 2433 |
mdb_getareg(1, "rip", ®ip) != 0) { |
| 2434 |
#else
|
| 2435 |
#ifdef __i386
|
| 2436 |
if (mdb_getareg(1, "ebp", ®fp) != 0 || |
| 2437 |
mdb_getareg(1, "eip", ®ip) != 0) { |
| 2438 |
#else
|
| 2439 |
#error Unrecognized microprocessor
|
| 2440 |
#endif
|
| 2441 |
#endif
|
| 2442 |
v8_warn("failed to load current context");
|
| 2443 |
return (-1); |
| 2444 |
} |
| 2445 |
|
| 2446 |
if (fpp != NULL) |
| 2447 |
*fpp = (uintptr_t)regfp; |
| 2448 |
|
| 2449 |
if (raddrp != NULL) |
| 2450 |
*raddrp = (uintptr_t)regip; |
| 2451 |
|
| 2452 |
return (0); |
| 2453 |
} |
| 2454 |
|
| 2455 |
static int |
| 2456 |
do_jsframe_special(uintptr_t fptr, uintptr_t raddr, char *prop)
|
| 2457 |
{
|
| 2458 |
uintptr_t ftype; |
| 2459 |
const char *ftypename; |
| 2460 |
|
| 2461 |
/*
|
| 2462 |
* First see if this looks like a native frame rather than a JavaScript
|
| 2463 |
* frame. We check this by asking MDB to print the return address
|
| 2464 |
* symbolically. If that works, we assume this was NOT a V8 frame,
|
| 2465 |
* since those are never in the symbol table.
|
| 2466 |
*/
|
| 2467 |
if (mdb_snprintf(NULL, 0, "%A", raddr) > 1) { |
| 2468 |
if (prop != NULL) |
| 2469 |
return (0); |
| 2470 |
|
| 2471 |
mdb_printf("%p %a\n", fptr, raddr);
|
| 2472 |
return (0); |
| 2473 |
} |
| 2474 |
|
| 2475 |
/*
|
| 2476 |
* Figure out what kind of frame this is using the same algorithm as
|
| 2477 |
* V8's ComputeType function. First, look for an ArgumentsAdaptorFrame.
|
| 2478 |
*/
|
| 2479 |
if (mdb_vread(&ftype, sizeof (ftype), fptr + V8_OFF_FP_CONTEXT) != -1 && |
| 2480 |
V8_IS_SMI(ftype) && |
| 2481 |
(ftypename = enum_lookup_str(v8_frametypes, V8_SMI_VALUE(ftype), |
| 2482 |
NULL)) != NULL && strstr(ftypename, "ArgumentsAdaptor") != NULL) { |
| 2483 |
if (prop != NULL) |
| 2484 |
return (0); |
| 2485 |
|
| 2486 |
mdb_printf("%p %a <%s>\n", fptr, raddr, ftypename);
|
| 2487 |
return (0); |
| 2488 |
} |
| 2489 |
|
| 2490 |
/*
|
| 2491 |
* Other special frame types are indicated by a marker.
|
| 2492 |
*/
|
| 2493 |
if (mdb_vread(&ftype, sizeof (ftype), fptr + V8_OFF_FP_MARKER) != -1 && |
| 2494 |
V8_IS_SMI(ftype)) {
|
| 2495 |
if (prop != NULL) |
| 2496 |
return (0); |
| 2497 |
|
| 2498 |
ftypename = enum_lookup_str(v8_frametypes, V8_SMI_VALUE(ftype), |
| 2499 |
NULL);
|
| 2500 |
|
| 2501 |
if (ftypename != NULL) |
| 2502 |
mdb_printf("%p %a <%s>\n", fptr, raddr, ftypename);
|
| 2503 |
else
|
| 2504 |
mdb_printf("%p %a\n", fptr, raddr);
|
| 2505 |
|
| 2506 |
return (0); |
| 2507 |
} |
| 2508 |
|
| 2509 |
return (-1); |
| 2510 |
} |
| 2511 |
|
| 2512 |
static int |
| 2513 |
do_jsframe(uintptr_t fptr, uintptr_t raddr, boolean_t verbose, |
| 2514 |
char *func, char *prop) |
| 2515 |
{
|
| 2516 |
uintptr_t funcp, funcinfop, tokpos, scriptp, lendsp, ptrp; |
| 2517 |
uintptr_t ii, nargs; |
| 2518 |
const char *typename; |
| 2519 |
char *bufp;
|
| 2520 |
size_t len; |
| 2521 |
uint8_t type; |
| 2522 |
char buf[256]; |
| 2523 |
|
| 2524 |
/*
|
| 2525 |
* Check for non-JavaScript frames first.
|
| 2526 |
*/
|
| 2527 |
if (func == NULL && do_jsframe_special(fptr, raddr, prop) == 0) |
| 2528 |
return (DCMD_OK);
|
| 2529 |
|
| 2530 |
/*
|
| 2531 |
* At this point we assume we're looking at a JavaScript frame. As with
|
| 2532 |
* native frames, fish the address out of the parent frame.
|
| 2533 |
*/
|
| 2534 |
if (mdb_vread(&funcp, sizeof (funcp), |
| 2535 |
fptr + V8_OFF_FP_FUNCTION) == -1) {
|
| 2536 |
v8_warn("failed to read stack at %p",
|
| 2537 |
fptr + V8_OFF_FP_FUNCTION); |
| 2538 |
return (DCMD_ERR);
|
| 2539 |
} |
| 2540 |
|
| 2541 |
/*
|
| 2542 |
* Check if this thing is really a JSFunction at all. For some frames,
|
| 2543 |
* it's a Code object, presumably indicating some internal frame.
|
| 2544 |
*/
|
| 2545 |
v8_silent++; |
| 2546 |
|
| 2547 |
if (read_typebyte(&type, funcp) != 0 || |
| 2548 |
(typename = enum_lookup_str(v8_types, type, NULL)) == NULL) { |
| 2549 |
v8_silent--; |
| 2550 |
|
| 2551 |
if (func != NULL || prop != NULL) |
| 2552 |
return (DCMD_OK);
|
| 2553 |
|
| 2554 |
mdb_printf("%p %a\n", fptr, raddr);
|
| 2555 |
return (DCMD_OK);
|
| 2556 |
} |
| 2557 |
|
| 2558 |
v8_silent--; |
| 2559 |
|
| 2560 |
if (strcmp("Code", typename) == 0) { |
| 2561 |
if (func != NULL || prop != NULL) |
| 2562 |
return (DCMD_OK);
|
| 2563 |
|
| 2564 |
mdb_printf("%p %a internal (Code: %p)\n", fptr, raddr, funcp);
|
| 2565 |
return (DCMD_OK);
|
| 2566 |
} |
| 2567 |
|
| 2568 |
if (strcmp("JSFunction", typename) != 0) { |
| 2569 |
if (func != NULL || prop != NULL) |
| 2570 |
return (DCMD_OK);
|
| 2571 |
|
| 2572 |
mdb_printf("%p %a unknown (%s: %p)", fptr, raddr, typename,
|
| 2573 |
funcp); |
| 2574 |
return (DCMD_OK);
|
| 2575 |
} |
| 2576 |
|
| 2577 |
if (read_heap_ptr(&funcinfop, funcp, V8_OFF_JSFUNCTION_SHARED) != 0) |
| 2578 |
return (DCMD_ERR);
|
| 2579 |
|
| 2580 |
bufp = buf; |
| 2581 |
len = sizeof (buf);
|
| 2582 |
if (jsfunc_name(funcinfop, &bufp, &len) != 0) |
| 2583 |
return (DCMD_ERR);
|
| 2584 |
|
| 2585 |
if (func != NULL && strcmp(buf, func) != 0) |
| 2586 |
return (DCMD_OK);
|
| 2587 |
|
| 2588 |
if (prop == NULL) |
| 2589 |
mdb_printf("%p %a %s (%p)\n", fptr, raddr, buf, funcp);
|
| 2590 |
|
| 2591 |
if (!verbose && prop == NULL) |
| 2592 |
return (DCMD_OK);
|
| 2593 |
|
| 2594 |
/*
|
| 2595 |
* Although the token position is technically an SMI, we're going to
|
| 2596 |
* byte-compare it to other SMI values so we don't want decode it here.
|
| 2597 |
*/
|
| 2598 |
if (read_heap_ptr(&tokpos, funcinfop,
|
| 2599 |
V8_OFF_SHAREDFUNCTIONINFO_FUNCTION_TOKEN_POSITION) != 0)
|
| 2600 |
return (DCMD_ERR);
|
| 2601 |
|
| 2602 |
if (read_heap_ptr(&scriptp, funcinfop,
|
| 2603 |
V8_OFF_SHAREDFUNCTIONINFO_SCRIPT) != 0)
|
| 2604 |
return (DCMD_ERR);
|
| 2605 |
|
| 2606 |
if (read_heap_ptr(&ptrp, scriptp, V8_OFF_SCRIPT_NAME) != 0) |
| 2607 |
return (DCMD_ERR);
|
| 2608 |
|
| 2609 |
bufp = buf; |
| 2610 |
len = sizeof (buf);
|
| 2611 |
(void) jsstr_print(ptrp, JSSTR_NUDE, &bufp, &len);
|
| 2612 |
|
| 2613 |
if (prop != NULL && strcmp(prop, "file") == 0) { |
| 2614 |
mdb_printf("%s\n", buf);
|
| 2615 |
return (DCMD_OK);
|
| 2616 |
} |
| 2617 |
|
| 2618 |
if (prop == NULL) { |
| 2619 |
(void) mdb_inc_indent(4); |
| 2620 |
mdb_printf("file: %s\n", buf);
|
| 2621 |
} |
| 2622 |
|
| 2623 |
if (read_heap_ptr(&lendsp, scriptp, V8_OFF_SCRIPT_LINE_ENDS) != 0) |
| 2624 |
return (DCMD_ERR);
|
| 2625 |
|
| 2626 |
(void) jsfunc_lineno(lendsp, tokpos, buf, sizeof (buf)); |
| 2627 |
|
| 2628 |
if (prop != NULL && strcmp(prop, "posn") == 0) { |
| 2629 |
mdb_printf("%s\n", buf);
|
| 2630 |
return (DCMD_OK);
|
| 2631 |
} |
| 2632 |
|
| 2633 |
if (prop == NULL) |
| 2634 |
mdb_printf("posn: %s\n", buf);
|
| 2635 |
|
| 2636 |
if (read_heap_smi(&nargs, funcinfop,
|
| 2637 |
V8_OFF_SHAREDFUNCTIONINFO_LENGTH) == 0) {
|
| 2638 |
for (ii = 0; ii < nargs; ii++) { |
| 2639 |
uintptr_t argptr; |
| 2640 |
char arg[10]; |
| 2641 |
|
| 2642 |
if (mdb_vread(&argptr, sizeof (argptr), |
| 2643 |
fptr + V8_OFF_FP_ARGS + (nargs - ii - 1) *
|
| 2644 |
sizeof (uintptr_t)) == -1) |
| 2645 |
continue;
|
| 2646 |
|
| 2647 |
(void) snprintf(arg, sizeof (arg), "arg%d", ii + 1); |
| 2648 |
|
| 2649 |
if (prop != NULL) { |
| 2650 |
if (strcmp(arg, prop) != 0) |
| 2651 |
continue;
|
| 2652 |
|
| 2653 |
mdb_printf("%p\n", argptr);
|
| 2654 |
return (DCMD_OK);
|
| 2655 |
} |
| 2656 |
|
| 2657 |
bufp = buf; |
| 2658 |
len = sizeof (buf);
|
| 2659 |
(void) obj_jstype(argptr, &bufp, &len, NULL); |
| 2660 |
|
| 2661 |
mdb_printf("arg%d: %p (%s)\n", (ii + 1), argptr, buf); |
| 2662 |
} |
| 2663 |
} |
| 2664 |
|
| 2665 |
if (prop != NULL) { |
| 2666 |
mdb_warn("unknown frame property '%s'\n", prop);
|
| 2667 |
return (DCMD_ERR);
|
| 2668 |
} |
| 2669 |
|
| 2670 |
(void) mdb_dec_indent(4); |
| 2671 |
|
| 2672 |
return (DCMD_OK);
|
| 2673 |
} |
| 2674 |
|
| 2675 |
typedef struct findjsobjects_prop { |
| 2676 |
struct findjsobjects_prop *fjsp_next;
|
| 2677 |
char fjsp_desc[1]; |
| 2678 |
} findjsobjects_prop_t; |
| 2679 |
|
| 2680 |
typedef struct findjsobjects_instance { |
| 2681 |
uintptr_t fjsi_addr; |
| 2682 |
struct findjsobjects_instance *fjsi_next;
|
| 2683 |
} findjsobjects_instance_t; |
| 2684 |
|
| 2685 |
typedef struct findjsobjects_obj { |
| 2686 |
findjsobjects_prop_t *fjso_props; |
| 2687 |
findjsobjects_prop_t *fjso_last; |
| 2688 |
size_t fjso_nprops; |
| 2689 |
findjsobjects_instance_t fjso_instances; |
| 2690 |
int fjso_ninstances;
|
| 2691 |
avl_node_t fjso_node; |
| 2692 |
struct findjsobjects_obj *fjso_next;
|
| 2693 |
boolean_t fjso_malformed; |
| 2694 |
char fjso_constructor[80]; |
| 2695 |
} findjsobjects_obj_t; |
| 2696 |
|
| 2697 |
typedef struct findjsobjects_stats { |
| 2698 |
int fjss_heapobjs;
|
| 2699 |
int fjss_cached;
|
| 2700 |
int fjss_typereads;
|
| 2701 |
int fjss_jsobjs;
|
| 2702 |
int fjss_objects;
|
| 2703 |
int fjss_arrays;
|
| 2704 |
int fjss_uniques;
|
| 2705 |
} findjsobjects_stats_t; |
| 2706 |
|
| 2707 |
typedef struct findjsobjects_reference { |
| 2708 |
uintptr_t fjsrf_addr; |
| 2709 |
char *fjsrf_desc;
|
| 2710 |
size_t fjsrf_index; |
| 2711 |
struct findjsobjects_reference *fjsrf_next;
|
| 2712 |
} findjsobjects_reference_t; |
| 2713 |
|
| 2714 |
typedef struct findjsobjects_referent { |
| 2715 |
avl_node_t fjsr_node; |
| 2716 |
uintptr_t fjsr_addr; |
| 2717 |
findjsobjects_reference_t *fjsr_head; |
| 2718 |
findjsobjects_reference_t *fjsr_tail; |
| 2719 |
struct findjsobjects_referent *fjsr_next;
|
| 2720 |
} findjsobjects_referent_t; |
| 2721 |
|
| 2722 |
typedef struct findjsobjects_state { |
| 2723 |
uintptr_t fjs_addr; |
| 2724 |
uintptr_t fjs_size; |
| 2725 |
boolean_t fjs_verbose; |
| 2726 |
boolean_t fjs_brk; |
| 2727 |
boolean_t fjs_allobjs; |
| 2728 |
boolean_t fjs_initialized; |
| 2729 |
boolean_t fjs_marking; |
| 2730 |
boolean_t fjs_referred; |
| 2731 |
avl_tree_t fjs_tree; |
| 2732 |
avl_tree_t fjs_referents; |
| 2733 |
findjsobjects_referent_t *fjs_head; |
| 2734 |
findjsobjects_referent_t *fjs_tail; |
| 2735 |
findjsobjects_obj_t *fjs_current; |
| 2736 |
findjsobjects_obj_t *fjs_objects; |
| 2737 |
findjsobjects_stats_t fjs_stats; |
| 2738 |
} findjsobjects_state_t; |
| 2739 |
|
| 2740 |
findjsobjects_obj_t * |
| 2741 |
findjsobjects_alloc(uintptr_t addr) |
| 2742 |
{
|
| 2743 |
findjsobjects_obj_t *obj; |
| 2744 |
|
| 2745 |
obj = mdb_zalloc(sizeof (findjsobjects_obj_t), UM_SLEEP);
|
| 2746 |
obj->fjso_instances.fjsi_addr = addr; |
| 2747 |
obj->fjso_ninstances = 1;
|
| 2748 |
|
| 2749 |
return (obj);
|
| 2750 |
} |
| 2751 |
|
| 2752 |
void
|
| 2753 |
findjsobjects_free(findjsobjects_obj_t *obj) |
| 2754 |
{
|
| 2755 |
findjsobjects_prop_t *prop, *next; |
| 2756 |
|
| 2757 |
for (prop = obj->fjso_props; prop != NULL; prop = next) { |
| 2758 |
next = prop->fjsp_next; |
| 2759 |
mdb_free(prop, sizeof (findjsobjects_prop_t) +
|
| 2760 |
strlen(prop->fjsp_desc)); |
| 2761 |
} |
| 2762 |
|
| 2763 |
mdb_free(obj, sizeof (findjsobjects_obj_t));
|
| 2764 |
} |
| 2765 |
|
| 2766 |
int
|
| 2767 |
findjsobjects_cmp(findjsobjects_obj_t *lhs, findjsobjects_obj_t *rhs) |
| 2768 |
{
|
| 2769 |
findjsobjects_prop_t *lprop, *rprop; |
| 2770 |
int rv;
|
| 2771 |
|
| 2772 |
lprop = lhs->fjso_props; |
| 2773 |
rprop = rhs->fjso_props; |
| 2774 |
|
| 2775 |
while (lprop != NULL && rprop != NULL) { |
| 2776 |
if ((rv = strcmp(lprop->fjsp_desc, rprop->fjsp_desc)) != 0) |
| 2777 |
return (rv > 0 ? 1 : -1); |
| 2778 |
|
| 2779 |
lprop = lprop->fjsp_next; |
| 2780 |
rprop = rprop->fjsp_next; |
| 2781 |
} |
| 2782 |
|
| 2783 |
if (lprop != NULL) |
| 2784 |
return (1); |
| 2785 |
|
| 2786 |
if (rprop != NULL) |
| 2787 |
return (-1); |
| 2788 |
|
| 2789 |
if (lhs->fjso_nprops > rhs->fjso_nprops)
|
| 2790 |
return (1); |
| 2791 |
|
| 2792 |
if (lhs->fjso_nprops < rhs->fjso_nprops)
|
| 2793 |
return (-1); |
| 2794 |
|
| 2795 |
rv = strcmp(lhs->fjso_constructor, rhs->fjso_constructor); |
| 2796 |
|
| 2797 |
return (rv < 0 ? -1 : rv > 0 ? 1 : 0); |
| 2798 |
} |
| 2799 |
|
| 2800 |
int
|
| 2801 |
findjsobjects_cmp_referents(findjsobjects_referent_t *lhs, |
| 2802 |
findjsobjects_referent_t *rhs) |
| 2803 |
{
|
| 2804 |
if (lhs->fjsr_addr < rhs->fjsr_addr)
|
| 2805 |
return (-1); |
| 2806 |
|
| 2807 |
if (lhs->fjsr_addr > rhs->fjsr_addr)
|
| 2808 |
return (1); |
| 2809 |
|
| 2810 |
return (0); |
| 2811 |
} |
| 2812 |
|
| 2813 |
int
|
| 2814 |
findjsobjects_cmp_ninstances(const void *l, const void *r) |
| 2815 |
{
|
| 2816 |
findjsobjects_obj_t *lhs = *((findjsobjects_obj_t **)l); |
| 2817 |
findjsobjects_obj_t *rhs = *((findjsobjects_obj_t **)r); |
| 2818 |
size_t lprod = lhs->fjso_ninstances * lhs->fjso_nprops; |
| 2819 |
size_t rprod = rhs->fjso_ninstances * rhs->fjso_nprops; |
| 2820 |
|
| 2821 |
if (lprod < rprod)
|
| 2822 |
return (-1); |
| 2823 |
|
| 2824 |
if (lprod > rprod)
|
| 2825 |
return (1); |
| 2826 |
|
| 2827 |
if (lhs->fjso_ninstances < rhs->fjso_ninstances)
|
| 2828 |
return (-1); |
| 2829 |
|
| 2830 |
if (lhs->fjso_ninstances > rhs->fjso_ninstances)
|
| 2831 |
return (1); |
| 2832 |
|
| 2833 |
if (lhs->fjso_nprops < rhs->fjso_nprops)
|
| 2834 |
return (-1); |
| 2835 |
|
| 2836 |
if (lhs->fjso_nprops > rhs->fjso_nprops)
|
| 2837 |
return (1); |
| 2838 |
|
| 2839 |
return (0); |
| 2840 |
} |
| 2841 |
|
| 2842 |
/*ARGSUSED*/
|
| 2843 |
int
|
| 2844 |
findjsobjects_prop(const char *desc, uintptr_t val, void *arg) |
| 2845 |
{
|
| 2846 |
findjsobjects_state_t *fjs = arg; |
| 2847 |
findjsobjects_obj_t *current = fjs->fjs_current; |
| 2848 |
findjsobjects_prop_t *prop; |
| 2849 |
|
| 2850 |
if (desc == NULL) |
| 2851 |
desc = "<unknown>";
|
| 2852 |
|
| 2853 |
prop = mdb_zalloc(sizeof (findjsobjects_prop_t) +
|
| 2854 |
strlen(desc), UM_SLEEP); |
| 2855 |
|
| 2856 |
strcpy(prop->fjsp_desc, desc); |
| 2857 |
|
| 2858 |
if (current->fjso_last != NULL) { |
| 2859 |
current->fjso_last->fjsp_next = prop; |
| 2860 |
} else {
|
| 2861 |
current->fjso_props = prop; |
| 2862 |
} |
| 2863 |
|
| 2864 |
current->fjso_last = prop; |
| 2865 |
current->fjso_nprops++; |
| 2866 |
current->fjso_malformed = |
| 2867 |
val == NULL && current->fjso_nprops == 1 && desc[0] == '<'; |
| 2868 |
|
| 2869 |
return (0); |
| 2870 |
} |
| 2871 |
|
| 2872 |
static void |
| 2873 |
findjsobjects_constructor(findjsobjects_obj_t *obj) |
| 2874 |
{
|
| 2875 |
char *bufp = obj->fjso_constructor;
|
| 2876 |
size_t len = sizeof (obj->fjso_constructor);
|
| 2877 |
uintptr_t map, funcinfop; |
| 2878 |
uintptr_t addr = obj->fjso_instances.fjsi_addr; |
| 2879 |
uint8_t type; |
| 2880 |
|
| 2881 |
v8_silent++; |
| 2882 |
|
| 2883 |
if (read_heap_ptr(&map, addr, V8_OFF_HEAPOBJECT_MAP) != 0 || |
| 2884 |
read_heap_ptr(&addr, map, V8_OFF_MAP_CONSTRUCTOR) != 0)
|
| 2885 |
goto out;
|
| 2886 |
|
| 2887 |
if (read_typebyte(&type, addr) != 0) |
| 2888 |
goto out;
|
| 2889 |
|
| 2890 |
if (strcmp(enum_lookup_str(v8_types, type, ""), "JSFunction") != 0) |
| 2891 |
goto out;
|
| 2892 |
|
| 2893 |
if (read_heap_ptr(&funcinfop, addr, V8_OFF_JSFUNCTION_SHARED) != 0) |
| 2894 |
goto out;
|
| 2895 |
|
| 2896 |
if (jsfunc_name(funcinfop, &bufp, &len) != 0) |
| 2897 |
goto out;
|
| 2898 |
out:
|
| 2899 |
v8_silent--; |
| 2900 |
} |
| 2901 |
|
| 2902 |
int
|
| 2903 |
findjsobjects_range(findjsobjects_state_t *fjs, uintptr_t addr, uintptr_t size) |
| 2904 |
{
|
| 2905 |
uintptr_t limit; |
| 2906 |
findjsobjects_stats_t *stats = &fjs->fjs_stats; |
| 2907 |
uint8_t type; |
| 2908 |
int jsobject = V8_TYPE_JSOBJECT, jsarray = V8_TYPE_JSARRAY;
|
| 2909 |
caddr_t range = mdb_alloc(size, UM_SLEEP); |
| 2910 |
uintptr_t base = addr, mapaddr; |
| 2911 |
|
| 2912 |
if (mdb_vread(range, size, addr) == -1) |
| 2913 |
return (0); |
| 2914 |
|
| 2915 |
for (limit = addr + size; addr < limit; addr++) {
|
| 2916 |
findjsobjects_instance_t *inst; |
| 2917 |
findjsobjects_obj_t *obj; |
| 2918 |
avl_index_t where; |
| 2919 |
|
| 2920 |
if (V8_IS_SMI(addr))
|
| 2921 |
continue;
|
| 2922 |
|
| 2923 |
if (!V8_IS_HEAPOBJECT(addr))
|
| 2924 |
continue;
|
| 2925 |
|
| 2926 |
stats->fjss_heapobjs++; |
| 2927 |
|
| 2928 |
mapaddr = *((uintptr_t *)((uintptr_t)range + |
| 2929 |
(addr - base) + V8_OFF_HEAPOBJECT_MAP)); |
| 2930 |
|
| 2931 |
if (!V8_IS_HEAPOBJECT(mapaddr))
|
| 2932 |
continue;
|
| 2933 |
|
| 2934 |
mapaddr += V8_OFF_MAP_INSTANCE_ATTRIBUTES; |
| 2935 |
stats->fjss_typereads++; |
| 2936 |
|
| 2937 |
if (mapaddr >= base && mapaddr < base + size) {
|
| 2938 |
stats->fjss_cached++; |
| 2939 |
|
| 2940 |
type = *((uint8_t *)((uintptr_t)range + |
| 2941 |
(mapaddr - base))); |
| 2942 |
} else {
|
| 2943 |
if (mdb_vread(&type, sizeof (uint8_t), mapaddr) == -1) |
| 2944 |
continue;
|
| 2945 |
} |
| 2946 |
|
| 2947 |
if (type != jsobject && type != jsarray)
|
| 2948 |
continue;
|
| 2949 |
|
| 2950 |
stats->fjss_jsobjs++; |
| 2951 |
|
| 2952 |
fjs->fjs_current = findjsobjects_alloc(addr); |
| 2953 |
|
| 2954 |
if (type == jsobject) {
|
| 2955 |
if (jsobj_properties(addr,
|
| 2956 |
findjsobjects_prop, fjs) != 0) {
|
| 2957 |
findjsobjects_free(fjs->fjs_current); |
| 2958 |
fjs->fjs_current = NULL;
|
| 2959 |
continue;
|
| 2960 |
} |
| 2961 |
|
| 2962 |
findjsobjects_constructor(fjs->fjs_current); |
| 2963 |
stats->fjss_objects++; |
| 2964 |
} else {
|
| 2965 |
uintptr_t ptr; |
| 2966 |
size_t *nprops = &fjs->fjs_current->fjso_nprops; |
| 2967 |
ssize_t len = V8_OFF_JSARRAY_LENGTH; |
| 2968 |
ssize_t elems = V8_OFF_JSOBJECT_ELEMENTS; |
| 2969 |
ssize_t flen = V8_OFF_FIXEDARRAY_LENGTH; |
| 2970 |
uintptr_t nelems; |
| 2971 |
uint8_t t; |
| 2972 |
|
| 2973 |
if (read_heap_smi(nprops, addr, len) != 0 || |
| 2974 |
read_heap_ptr(&ptr, addr, elems) != 0 ||
|
| 2975 |
!V8_IS_HEAPOBJECT(ptr) || |
| 2976 |
read_typebyte(&t, ptr) != 0 ||
|
| 2977 |
t != V8_TYPE_FIXEDARRAY || |
| 2978 |
read_heap_smi(&nelems, ptr, flen) != 0 ||
|
| 2979 |
nelems < *nprops) {
|
| 2980 |
findjsobjects_free(fjs->fjs_current); |
| 2981 |
fjs->fjs_current = NULL;
|
| 2982 |
continue;
|
| 2983 |
} |
| 2984 |
|
| 2985 |
strcpy(fjs->fjs_current->fjso_constructor, "Array");
|
| 2986 |
stats->fjss_arrays++; |
| 2987 |
} |
| 2988 |
|
| 2989 |
/*
|
| 2990 |
* Now determine if we already have an object matching our
|
| 2991 |
* properties. If we don't, we'll add our new object; if we
|
| 2992 |
* do we'll merely enqueue our instance.
|
| 2993 |
*/
|
| 2994 |
obj = avl_find(&fjs->fjs_tree, fjs->fjs_current, &where); |
| 2995 |
|
| 2996 |
if (obj == NULL) { |
| 2997 |
avl_add(&fjs->fjs_tree, fjs->fjs_current); |
| 2998 |
fjs->fjs_current->fjso_next = fjs->fjs_objects; |
| 2999 |
fjs->fjs_objects = fjs->fjs_current; |
| 3000 |
fjs->fjs_current = NULL;
|
| 3001 |
stats->fjss_uniques++; |
| 3002 |
continue;
|
| 3003 |
} |
| 3004 |
|
| 3005 |
findjsobjects_free(fjs->fjs_current); |
| 3006 |
fjs->fjs_current = NULL;
|
| 3007 |
|
| 3008 |
inst = mdb_alloc(sizeof (findjsobjects_instance_t), UM_SLEEP);
|
| 3009 |
inst->fjsi_addr = addr; |
| 3010 |
inst->fjsi_next = obj->fjso_instances.fjsi_next; |
| 3011 |
obj->fjso_instances.fjsi_next = inst; |
| 3012 |
obj->fjso_ninstances++; |
| 3013 |
} |
| 3014 |
|
| 3015 |
mdb_free(range, size); |
| 3016 |
|
| 3017 |
return (0); |
| 3018 |
} |
| 3019 |
|
| 3020 |
static int |
| 3021 |
findjsobjects_mapping(findjsobjects_state_t *fjs, const prmap_t *pmp,
|
| 3022 |
const char *name) |
| 3023 |
{
|
| 3024 |
if (name != NULL && !(fjs->fjs_brk && (pmp->pr_mflags & MA_BREAK))) |
| 3025 |
return (0); |
| 3026 |
|
| 3027 |
if (fjs->fjs_addr != NULL && (fjs->fjs_addr < pmp->pr_vaddr || |
| 3028 |
fjs->fjs_addr >= pmp->pr_vaddr + pmp->pr_size)) |
| 3029 |
return (0); |
| 3030 |
|
| 3031 |
return (findjsobjects_range(fjs, pmp->pr_vaddr, pmp->pr_size));
|
| 3032 |
} |
| 3033 |
|
| 3034 |
static void |
| 3035 |
findjsobjects_references_add(findjsobjects_state_t *fjs, uintptr_t val, |
| 3036 |
const char *desc, size_t index) |
| 3037 |
{
|
| 3038 |
findjsobjects_referent_t search, *referent; |
| 3039 |
findjsobjects_reference_t *reference; |
| 3040 |
|
| 3041 |
search.fjsr_addr = val; |
| 3042 |
|
| 3043 |
if ((referent = avl_find(&fjs->fjs_referents, &search, NULL)) == NULL) |
| 3044 |
return;
|
| 3045 |
|
| 3046 |
reference = mdb_zalloc(sizeof (*reference), UM_SLEEP | UM_GC);
|
| 3047 |
reference->fjsrf_addr = fjs->fjs_addr; |
| 3048 |
|
| 3049 |
if (desc != NULL) { |
| 3050 |
reference->fjsrf_desc = |
| 3051 |
mdb_alloc(strlen(desc) + 1, UM_SLEEP | UM_GC);
|
| 3052 |
(void) strcpy(reference->fjsrf_desc, desc);
|
| 3053 |
} else {
|
| 3054 |
reference->fjsrf_index = index; |
| 3055 |
} |
| 3056 |
|
| 3057 |
if (referent->fjsr_head == NULL) { |
| 3058 |
referent->fjsr_head = reference; |
| 3059 |
} else {
|
| 3060 |
referent->fjsr_tail->fjsrf_next = reference; |
| 3061 |
} |
| 3062 |
|
| 3063 |
referent->fjsr_tail = reference; |
| 3064 |
} |
| 3065 |
|
| 3066 |
static int |
| 3067 |
findjsobjects_references_prop(const char *desc, uintptr_t val, void *arg) |
| 3068 |
{
|
| 3069 |
findjsobjects_references_add(arg, val, desc, -1);
|
| 3070 |
|
| 3071 |
return (0); |
| 3072 |
} |
| 3073 |
|
| 3074 |
static void |
| 3075 |
findjsobjects_references_array(findjsobjects_state_t *fjs, |
| 3076 |
findjsobjects_obj_t *obj) |
| 3077 |
{
|
| 3078 |
findjsobjects_instance_t *inst = &obj->fjso_instances; |
| 3079 |
uintptr_t *elts; |
| 3080 |
size_t i, len; |
| 3081 |
|
| 3082 |
for (; inst != NULL; inst = inst->fjsi_next) { |
| 3083 |
uintptr_t addr = inst->fjsi_addr, ptr; |
| 3084 |
|
| 3085 |
if (read_heap_ptr(&ptr, addr, V8_OFF_JSOBJECT_ELEMENTS) != 0 || |
| 3086 |
read_heap_array(ptr, &elts, &len, UM_SLEEP) != 0)
|
| 3087 |
continue;
|
| 3088 |
|
| 3089 |
fjs->fjs_addr = addr; |
| 3090 |
|
| 3091 |
for (i = 0; i < len; i++) |
| 3092 |
findjsobjects_references_add(fjs, elts[i], NULL, i);
|
| 3093 |
|
| 3094 |
mdb_free(elts, len * sizeof (uintptr_t));
|
| 3095 |
} |
| 3096 |
} |
| 3097 |
|
| 3098 |
static void |
| 3099 |
findjsobjects_referent(findjsobjects_state_t *fjs, uintptr_t addr) |
| 3100 |
{
|
| 3101 |
findjsobjects_referent_t search, *referent; |
| 3102 |
|
| 3103 |
search.fjsr_addr = addr; |
| 3104 |
|
| 3105 |
if (avl_find(&fjs->fjs_referents, &search, NULL) != NULL) { |
| 3106 |
assert(fjs->fjs_marking); |
| 3107 |
mdb_warn("%p is already marked; ignoring\n", addr);
|
| 3108 |
return;
|
| 3109 |
} |
| 3110 |
|
| 3111 |
referent = mdb_zalloc(sizeof (findjsobjects_referent_t), UM_SLEEP);
|
| 3112 |
referent->fjsr_addr = addr; |
| 3113 |
|
| 3114 |
avl_add(&fjs->fjs_referents, referent); |
| 3115 |
|
| 3116 |
if (fjs->fjs_tail != NULL) { |
| 3117 |
fjs->fjs_tail->fjsr_next = referent; |
| 3118 |
} else {
|
| 3119 |
fjs->fjs_head = referent; |
| 3120 |
} |
| 3121 |
|
| 3122 |
fjs->fjs_tail = referent; |
| 3123 |
|
| 3124 |
if (fjs->fjs_marking)
|
| 3125 |
mdb_printf("findjsobjects: marked %p\n", addr);
|
| 3126 |
} |
| 3127 |
|
| 3128 |
static void |
| 3129 |
findjsobjects_references(findjsobjects_state_t *fjs) |
| 3130 |
{
|
| 3131 |
findjsobjects_reference_t *reference; |
| 3132 |
findjsobjects_referent_t *referent; |
| 3133 |
avl_tree_t *referents = &fjs->fjs_referents; |
| 3134 |
findjsobjects_obj_t *obj; |
| 3135 |
void *cookie = NULL; |
| 3136 |
uintptr_t addr; |
| 3137 |
|
| 3138 |
fjs->fjs_referred = B_FALSE; |
| 3139 |
|
| 3140 |
v8_silent++; |
| 3141 |
|
| 3142 |
/*
|
| 3143 |
* First traverse over all objects and arrays, looking for references
|
| 3144 |
* to our designated referent(s).
|
| 3145 |
*/
|
| 3146 |
for (obj = fjs->fjs_objects; obj != NULL; obj = obj->fjso_next) { |
| 3147 |
findjsobjects_instance_t *head = &obj->fjso_instances, *inst; |
| 3148 |
|
| 3149 |
if (obj->fjso_nprops != 0 && obj->fjso_props == NULL) { |
| 3150 |
findjsobjects_references_array(fjs, obj); |
| 3151 |
continue;
|
| 3152 |
} |
| 3153 |
|
| 3154 |
for (inst = head; inst != NULL; inst = inst->fjsi_next) { |
| 3155 |
fjs->fjs_addr = inst->fjsi_addr; |
| 3156 |
|
| 3157 |
(void) jsobj_properties(inst->fjsi_addr,
|
| 3158 |
findjsobjects_references_prop, fjs); |
| 3159 |
} |
| 3160 |
} |
| 3161 |
|
| 3162 |
v8_silent--; |
| 3163 |
fjs->fjs_addr = NULL;
|
| 3164 |
|
| 3165 |
/*
|
| 3166 |
* Now go over our referent(s), reporting any references that we have
|
| 3167 |
* accumulated.
|
| 3168 |
*/
|
| 3169 |
for (referent = fjs->fjs_head; referent != NULL; |
| 3170 |
referent = referent->fjsr_next) {
|
| 3171 |
addr = referent->fjsr_addr; |
| 3172 |
|
| 3173 |
if ((reference = referent->fjsr_head) == NULL) { |
| 3174 |
mdb_printf("%p is not referred to by a "
|
| 3175 |
"known object.\n", addr);
|
| 3176 |
continue;
|
| 3177 |
} |
| 3178 |
|
| 3179 |
for (; reference != NULL; reference = reference->fjsrf_next) { |
| 3180 |
mdb_printf("%p referred to by %p",
|
| 3181 |
addr, reference->fjsrf_addr); |
| 3182 |
|
| 3183 |
if (reference->fjsrf_desc == NULL) { |
| 3184 |
mdb_printf("[%d]\n", reference->fjsrf_index);
|
| 3185 |
} else {
|
| 3186 |
mdb_printf(".%s\n", reference->fjsrf_desc);
|
| 3187 |
} |
| 3188 |
} |
| 3189 |
} |
| 3190 |
|
| 3191 |
/*
|
| 3192 |
* Finally, destroy our referent nodes.
|
| 3193 |
*/
|
| 3194 |
while ((referent = avl_destroy_nodes(referents, &cookie)) != NULL) |
| 3195 |
mdb_free(referent, sizeof (findjsobjects_referent_t));
|
| 3196 |
|
| 3197 |
fjs->fjs_head = NULL;
|
| 3198 |
fjs->fjs_tail = NULL;
|
| 3199 |
} |
| 3200 |
|
| 3201 |
static findjsobjects_instance_t *
|
| 3202 |
findjsobjects_instance(findjsobjects_state_t *fjs, uintptr_t addr, |
| 3203 |
findjsobjects_instance_t **headp) |
| 3204 |
{
|
| 3205 |
findjsobjects_obj_t *obj; |
| 3206 |
|
| 3207 |
for (obj = fjs->fjs_objects; obj != NULL; obj = obj->fjso_next) { |
| 3208 |
findjsobjects_instance_t *head = &obj->fjso_instances, *inst; |
| 3209 |
|
| 3210 |
for (inst = head; inst != NULL; inst = inst->fjsi_next) { |
| 3211 |
if (inst->fjsi_addr == addr) {
|
| 3212 |
*headp = head; |
| 3213 |
return (inst);
|
| 3214 |
} |
| 3215 |
} |
| 3216 |
} |
| 3217 |
|
| 3218 |
return (NULL); |
| 3219 |
} |
| 3220 |
|
| 3221 |
/*ARGSUSED*/
|
| 3222 |
static void |
| 3223 |
findjsobjects_match_all(findjsobjects_obj_t *obj, const char *ignored) |
| 3224 |
{
|
| 3225 |
mdb_printf("%p\n", obj->fjso_instances.fjsi_addr);
|
| 3226 |
} |
| 3227 |
|
| 3228 |
static void |
| 3229 |
findjsobjects_match_propname(findjsobjects_obj_t *obj, const char *propname) |
| 3230 |
{
|
| 3231 |
findjsobjects_prop_t *prop; |
| 3232 |
|
| 3233 |
for (prop = obj->fjso_props; prop != NULL; prop = prop->fjsp_next) { |
| 3234 |
if (strcmp(prop->fjsp_desc, propname) == 0) { |
| 3235 |
mdb_printf("%p\n", obj->fjso_instances.fjsi_addr);
|
| 3236 |
return;
|
| 3237 |
} |
| 3238 |
} |
| 3239 |
} |
| 3240 |
|
| 3241 |
static void |
| 3242 |
findjsobjects_match_constructor(findjsobjects_obj_t *obj, |
| 3243 |
const char *constructor) |
| 3244 |
{
|
| 3245 |
if (strcmp(constructor, obj->fjso_constructor) == 0) |
| 3246 |
mdb_printf("%p\n", obj->fjso_instances.fjsi_addr);
|
| 3247 |
} |
| 3248 |
|
| 3249 |
static int |
| 3250 |
findjsobjects_match(findjsobjects_state_t *fjs, uintptr_t addr, |
| 3251 |
uint_t flags, void (*func)(findjsobjects_obj_t *, const char *), |
| 3252 |
const char *match) |
| 3253 |
{
|
| 3254 |
findjsobjects_obj_t *obj; |
| 3255 |
|
| 3256 |
if (!(flags & DCMD_ADDRSPEC)) {
|
| 3257 |
for (obj = fjs->fjs_objects; obj != NULL; |
| 3258 |
obj = obj->fjso_next) {
|
| 3259 |
if (obj->fjso_malformed && !fjs->fjs_allobjs)
|
| 3260 |
continue;
|
| 3261 |
|
| 3262 |
func(obj, match); |
| 3263 |
} |
| 3264 |
|
| 3265 |
return (DCMD_OK);
|
| 3266 |
} |
| 3267 |
|
| 3268 |
/*
|
| 3269 |
* First, look for the specified address among the representative
|
| 3270 |
* objects.
|
| 3271 |
*/
|
| 3272 |
for (obj = fjs->fjs_objects; obj != NULL; obj = obj->fjso_next) { |
| 3273 |
if (obj->fjso_instances.fjsi_addr == addr) {
|
| 3274 |
func(obj, match); |
| 3275 |
return (DCMD_OK);
|
| 3276 |
} |
| 3277 |
} |
| 3278 |
|
| 3279 |
/*
|
| 3280 |
* We didn't find it among the representative objects; iterate over
|
| 3281 |
* all objects.
|
| 3282 |
*/
|
| 3283 |
for (obj = fjs->fjs_objects; obj != NULL; obj = obj->fjso_next) { |
| 3284 |
findjsobjects_instance_t *head = &obj->fjso_instances, *inst; |
| 3285 |
|
| 3286 |
for (inst = head; inst != NULL; inst = inst->fjsi_next) { |
| 3287 |
if (inst->fjsi_addr == addr) {
|
| 3288 |
func(obj, match); |
| 3289 |
return (DCMD_OK);
|
| 3290 |
} |
| 3291 |
} |
| 3292 |
} |
| 3293 |
|
| 3294 |
mdb_warn("%p does not correspond to a known object\n", addr);
|
| 3295 |
return (DCMD_ERR);
|
| 3296 |
} |
| 3297 |
|
| 3298 |
static void |
| 3299 |
findjsobjects_print(findjsobjects_obj_t *obj) |
| 3300 |
{
|
| 3301 |
int col = 19 + (sizeof (uintptr_t) * 2) + strlen("..."), len; |
| 3302 |
uintptr_t addr = obj->fjso_instances.fjsi_addr; |
| 3303 |
findjsobjects_prop_t *prop; |
| 3304 |
|
| 3305 |
mdb_printf("%?p %8d %8d ",
|
| 3306 |
addr, obj->fjso_ninstances, obj->fjso_nprops); |
| 3307 |
|
| 3308 |
if (obj->fjso_constructor[0] != '\0') { |
| 3309 |
mdb_printf("%s%s", obj->fjso_constructor,
|
| 3310 |
obj->fjso_props != NULL ? ": " : ""); |
| 3311 |
col += strlen(obj->fjso_constructor) + 2;
|
| 3312 |
} |
| 3313 |
|
| 3314 |
for (prop = obj->fjso_props; prop != NULL; prop = prop->fjsp_next) { |
| 3315 |
if (col + (len = strlen(prop->fjsp_desc) + 2) < 80) { |
| 3316 |
mdb_printf("%s%s", prop->fjsp_desc,
|
| 3317 |
prop->fjsp_next != NULL ? ", " : ""); |
| 3318 |
col += len; |
| 3319 |
} else {
|
| 3320 |
mdb_printf("...");
|
| 3321 |
break;
|
| 3322 |
} |
| 3323 |
} |
| 3324 |
|
| 3325 |
mdb_printf("\n", col);
|
| 3326 |
} |
| 3327 |
|
| 3328 |
static void |
| 3329 |
dcmd_findjsobjects_help(void)
|
| 3330 |
{
|
| 3331 |
mdb_printf("%s\n\n",
|
| 3332 |
"Finds all JavaScript objects in the V8 heap via brute force iteration over\n"
|
| 3333 |
"all mapped anonymous memory. (This can take up to several minutes on large\n"
|
| 3334 |
"dumps.) The output consists of representative objects, the number of\n"
|
| 3335 |
"instances of that object and the number of properties on the object --\n"
|
| 3336 |
"followed by the constructor and first few properties of the objects. Once\n"
|
| 3337 |
"run, subsequent calls to ::findjsobjects use cached data. If provided an\n"
|
| 3338 |
"address (and in the absence of -r, described below), ::findjsobjects treats\n"
|
| 3339 |
"the address as that of a representative object, and lists all instances of\n"
|
| 3340 |
"that object (that is, all objects that have a matching property signature).");
|
| 3341 |
|
| 3342 |
mdb_dec_indent(2);
|
| 3343 |
mdb_printf("%<b>OPTIONS%</b>\n");
|
| 3344 |
mdb_inc_indent(2);
|
| 3345 |
|
| 3346 |
mdb_printf("%s\n",
|
| 3347 |
" -b Include the heap denoted by the brk(2) (normally excluded)\n"
|
| 3348 |
" -c cons Display representative objects with the specified constructor\n"
|
| 3349 |
" -p prop Display representative objects that have the specified property\n"
|
| 3350 |
" -l List all objects that match the representative object\n"
|
| 3351 |
" -m Mark specified object for later reference determination via -r\n"
|
| 3352 |
" -r Find references to the specified and/or marked object(s)\n"
|
| 3353 |
" -v Provide verbose statistics\n");
|
| 3354 |
} |
| 3355 |
|
| 3356 |
static int |
| 3357 |
dcmd_findjsobjects(uintptr_t addr, |
| 3358 |
uint_t flags, int argc, const mdb_arg_t *argv) |
| 3359 |
{
|
| 3360 |
static findjsobjects_state_t fjs;
|
| 3361 |
static findjsobjects_stats_t *stats = &fjs.fjs_stats;
|
| 3362 |
findjsobjects_obj_t *obj; |
| 3363 |
struct ps_prochandle *Pr;
|
| 3364 |
boolean_t references = B_FALSE, listlike = B_FALSE; |
| 3365 |
const char *propname = NULL; |
| 3366 |
const char *constructor = NULL; |
| 3367 |
|
| 3368 |
fjs.fjs_verbose = B_FALSE; |
| 3369 |
fjs.fjs_brk = B_FALSE; |
| 3370 |
fjs.fjs_marking = B_FALSE; |
| 3371 |
fjs.fjs_allobjs = B_FALSE; |
| 3372 |
|
| 3373 |
if (mdb_getopts(argc, argv,
|
| 3374 |
'a', MDB_OPT_SETBITS, B_TRUE, &fjs.fjs_allobjs,
|
| 3375 |
'b', MDB_OPT_SETBITS, B_TRUE, &fjs.fjs_brk,
|
| 3376 |
'c', MDB_OPT_STR, &constructor,
|
| 3377 |
'l', MDB_OPT_SETBITS, B_TRUE, &listlike,
|
| 3378 |
'm', MDB_OPT_SETBITS, B_TRUE, &fjs.fjs_marking,
|
| 3379 |
'p', MDB_OPT_STR, &propname,
|
| 3380 |
'r', MDB_OPT_SETBITS, B_TRUE, &references,
|
| 3381 |
'v', MDB_OPT_SETBITS, B_TRUE, &fjs.fjs_verbose,
|
| 3382 |
NULL) != argc)
|
| 3383 |
return (DCMD_USAGE);
|
| 3384 |
|
| 3385 |
if (!fjs.fjs_initialized) {
|
| 3386 |
avl_create(&fjs.fjs_tree, |
| 3387 |
(int(*)(const void *, const void *))findjsobjects_cmp, |
| 3388 |
sizeof (findjsobjects_obj_t),
|
| 3389 |
offsetof(findjsobjects_obj_t, fjso_node)); |
| 3390 |
|
| 3391 |
avl_create(&fjs.fjs_referents, |
| 3392 |
(int(*)(const void *, const void *)) |
| 3393 |
findjsobjects_cmp_referents, |
| 3394 |
sizeof (findjsobjects_referent_t),
|
| 3395 |
offsetof(findjsobjects_referent_t, fjsr_node)); |
| 3396 |
|
| 3397 |
fjs.fjs_initialized = B_TRUE; |
| 3398 |
} |
| 3399 |
|
| 3400 |
if (avl_is_empty(&fjs.fjs_tree)) {
|
| 3401 |
findjsobjects_obj_t **sorted; |
| 3402 |
int nobjs, i;
|
| 3403 |
hrtime_t start = gethrtime(); |
| 3404 |
|
| 3405 |
if (mdb_get_xdata("pshandle", &Pr, sizeof (Pr)) == -1) { |
| 3406 |
mdb_warn("couldn't read pshandle xdata");
|
| 3407 |
return (DCMD_ERR);
|
| 3408 |
} |
| 3409 |
|
| 3410 |
v8_silent++; |
| 3411 |
|
| 3412 |
if (Pmapping_iter(Pr,
|
| 3413 |
(proc_map_f *)findjsobjects_mapping, &fjs) != 0) {
|
| 3414 |
v8_silent--; |
| 3415 |
return (DCMD_ERR);
|
| 3416 |
} |
| 3417 |
|
| 3418 |
if ((nobjs = avl_numnodes(&fjs.fjs_tree)) != 0) { |
| 3419 |
/*
|
| 3420 |
* We have the objects -- now sort them.
|
| 3421 |
*/
|
| 3422 |
sorted = mdb_alloc(nobjs * sizeof (void *), |
| 3423 |
UM_SLEEP | UM_GC); |
| 3424 |
|
| 3425 |
for (obj = fjs.fjs_objects, i = 0; obj != NULL; |
| 3426 |
obj = obj->fjso_next, i++) {
|
| 3427 |
sorted[i] = obj; |
| 3428 |
} |
| 3429 |
|
| 3430 |
qsort(sorted, avl_numnodes(&fjs.fjs_tree), |
| 3431 |
sizeof (void *), findjsobjects_cmp_ninstances); |
| 3432 |
|
| 3433 |
for (i = 1, fjs.fjs_objects = sorted[0]; i < nobjs; i++) |
| 3434 |
sorted[i - 1]->fjso_next = sorted[i];
|
| 3435 |
|
| 3436 |
sorted[nobjs - 1]->fjso_next = NULL; |
| 3437 |
} |
| 3438 |
|
| 3439 |
v8_silent--; |
| 3440 |
|
| 3441 |
if (fjs.fjs_verbose) {
|
| 3442 |
const char *f = "findjsobjects: %30s => %d\n"; |
| 3443 |
int elapsed = (int)((gethrtime() - start) / NANOSEC); |
| 3444 |
|
| 3445 |
mdb_printf(f, "elapsed time (seconds)", elapsed);
|
| 3446 |
mdb_printf(f, "heap objects", stats->fjss_heapobjs);
|
| 3447 |
mdb_printf(f, "type reads", stats->fjss_typereads);
|
| 3448 |
mdb_printf(f, "cached reads", stats->fjss_cached);
|
| 3449 |
mdb_printf(f, "JavaScript objects", stats->fjss_jsobjs);
|
| 3450 |
mdb_printf(f, "processed objects", stats->fjss_objects);
|
| 3451 |
mdb_printf(f, "processed arrays", stats->fjss_arrays);
|
| 3452 |
mdb_printf(f, "unique objects", stats->fjss_uniques);
|
| 3453 |
} |
| 3454 |
} |
| 3455 |
|
| 3456 |
if (listlike && !(flags & DCMD_ADDRSPEC)) {
|
| 3457 |
if (propname != NULL || constructor != NULL) { |
| 3458 |
char opt = propname != NULL ? 'p' : 'c'; |
| 3459 |
|
| 3460 |
mdb_warn("cannot specify -l with -%c; instead, pipe "
|
| 3461 |
"output of ::findjsobjects -%c to "
|
| 3462 |
"::findjsobjects -l\n", opt, opt);
|
| 3463 |
return (DCMD_ERR);
|
| 3464 |
} |
| 3465 |
|
| 3466 |
return (findjsobjects_match(&fjs, addr, flags,
|
| 3467 |
findjsobjects_match_all, NULL));
|
| 3468 |
} |
| 3469 |
|
| 3470 |
if (propname != NULL) { |
| 3471 |
if (constructor != NULL) { |
| 3472 |
mdb_warn("cannot specify both a property name "
|
| 3473 |
"and a constructor\n");
|
| 3474 |
return (DCMD_ERR);
|
| 3475 |
} |
| 3476 |
|
| 3477 |
return (findjsobjects_match(&fjs, addr, flags,
|
| 3478 |
findjsobjects_match_propname, propname)); |
| 3479 |
} |
| 3480 |
|
| 3481 |
if (constructor != NULL) { |
| 3482 |
return (findjsobjects_match(&fjs, addr, flags,
|
| 3483 |
findjsobjects_match_constructor, constructor)); |
| 3484 |
} |
| 3485 |
|
| 3486 |
if (references && !(flags & DCMD_ADDRSPEC) &&
|
| 3487 |
avl_is_empty(&fjs.fjs_referents)) {
|
| 3488 |
mdb_warn("must specify or mark an object to find references\n");
|
| 3489 |
return (DCMD_ERR);
|
| 3490 |
} |
| 3491 |
|
| 3492 |
if (fjs.fjs_marking && !(flags & DCMD_ADDRSPEC)) {
|
| 3493 |
mdb_warn("must specify an object to mark\n");
|
| 3494 |
return (DCMD_ERR);
|
| 3495 |
} |
| 3496 |
|
| 3497 |
if (references && fjs.fjs_marking) {
|
| 3498 |
mdb_warn("can't both mark an object and find its references\n");
|
| 3499 |
return (DCMD_ERR);
|
| 3500 |
} |
| 3501 |
|
| 3502 |
if (flags & DCMD_ADDRSPEC) {
|
| 3503 |
findjsobjects_instance_t *inst, *head; |
| 3504 |
|
| 3505 |
/*
|
| 3506 |
* If we've been passed an address, it's to either list like
|
| 3507 |
* objects (-l), mark an object (-m) or find references to the
|
| 3508 |
* specified/marked objects (-r). (Note that the absence of
|
| 3509 |
* any of these options implies -l.)
|
| 3510 |
*/
|
| 3511 |
inst = findjsobjects_instance(&fjs, addr, &head); |
| 3512 |
|
| 3513 |
if (inst == NULL) { |
| 3514 |
mdb_warn("%p is not a valid object\n", addr);
|
| 3515 |
return (DCMD_ERR);
|
| 3516 |
} |
| 3517 |
|
| 3518 |
if (!references && !fjs.fjs_marking) {
|
| 3519 |
for (inst = head; inst != NULL; inst = inst->fjsi_next) |
| 3520 |
mdb_printf("%p\n", inst->fjsi_addr);
|
| 3521 |
|
| 3522 |
return (DCMD_OK);
|
| 3523 |
} |
| 3524 |
|
| 3525 |
if (!listlike) {
|
| 3526 |
findjsobjects_referent(&fjs, inst->fjsi_addr); |
| 3527 |
} else {
|
| 3528 |
for (inst = head; inst != NULL; inst = inst->fjsi_next) |
| 3529 |
findjsobjects_referent(&fjs, inst->fjsi_addr); |
| 3530 |
} |
| 3531 |
} |
| 3532 |
|
| 3533 |
if (references)
|
| 3534 |
findjsobjects_references(&fjs); |
| 3535 |
|
| 3536 |
if (references || fjs.fjs_marking)
|
| 3537 |
return (DCMD_OK);
|
| 3538 |
|
| 3539 |
mdb_printf("%?s %8s %8s %s\n", "OBJECT", |
| 3540 |
"#OBJECTS", "#PROPS", "CONSTRUCTOR: PROPS"); |
| 3541 |
|
| 3542 |
for (obj = fjs.fjs_objects; obj != NULL; obj = obj->fjso_next) { |
| 3543 |
if (obj->fjso_malformed && !fjs.fjs_allobjs)
|
| 3544 |
continue;
|
| 3545 |
|
| 3546 |
findjsobjects_print(obj); |
| 3547 |
} |
| 3548 |
|
| 3549 |
return (DCMD_OK);
|
| 3550 |
} |
| 3551 |
|
| 3552 |
/* ARGSUSED */
|
| 3553 |
static int |
| 3554 |
dcmd_jsframe(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3555 |
{
|
| 3556 |
uintptr_t fptr, raddr; |
| 3557 |
boolean_t opt_v = B_FALSE, opt_i = B_FALSE; |
| 3558 |
char *opt_f = NULL, *opt_p = NULL; |
| 3559 |
|
| 3560 |
if (mdb_getopts(argc, argv,
|
| 3561 |
'v', MDB_OPT_SETBITS, B_TRUE, &opt_v,
|
| 3562 |
'i', MDB_OPT_SETBITS, B_TRUE, &opt_i,
|
| 3563 |
'f', MDB_OPT_STR, &opt_f,
|
| 3564 |
'p', MDB_OPT_STR, &opt_p, NULL) != argc) |
| 3565 |
return (DCMD_USAGE);
|
| 3566 |
|
| 3567 |
/*
|
| 3568 |
* As with $C, we assume we are given a *pointer* to the frame pointer
|
| 3569 |
* for a frame, rather than the actual frame pointer for the frame of
|
| 3570 |
* interest. This is needed to show the instruction pointer, which is
|
| 3571 |
* actually stored with the next frame. For debugging, this can be
|
| 3572 |
* overridden with the "-i" option (for "immediate").
|
| 3573 |
*/
|
| 3574 |
if (opt_i)
|
| 3575 |
return (do_jsframe(addr, 0, opt_v, opt_f, opt_p)); |
| 3576 |
|
| 3577 |
if (mdb_vread(&raddr, sizeof (raddr), |
| 3578 |
addr + sizeof (uintptr_t)) == -1) { |
| 3579 |
mdb_warn("failed to read return address from %p",
|
| 3580 |
addr + sizeof (uintptr_t));
|
| 3581 |
return (DCMD_ERR);
|
| 3582 |
} |
| 3583 |
|
| 3584 |
if (mdb_vread(&fptr, sizeof (fptr), addr) == -1) { |
| 3585 |
mdb_warn("failed to read frame pointer from %p", addr);
|
| 3586 |
return (DCMD_ERR);
|
| 3587 |
} |
| 3588 |
|
| 3589 |
if (fptr == NULL) |
| 3590 |
return (DCMD_OK);
|
| 3591 |
|
| 3592 |
return (do_jsframe(fptr, raddr, opt_v, opt_f, opt_p));
|
| 3593 |
} |
| 3594 |
|
| 3595 |
/* ARGSUSED */
|
| 3596 |
static int |
| 3597 |
dcmd_jsprint(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3598 |
{
|
| 3599 |
char *buf, *bufp;
|
| 3600 |
size_t bufsz = 262144, len = bufsz;
|
| 3601 |
jsobj_print_t jsop; |
| 3602 |
boolean_t opt_b = B_FALSE; |
| 3603 |
int rv, i;
|
| 3604 |
|
| 3605 |
bzero(&jsop, sizeof (jsop));
|
| 3606 |
jsop.jsop_depth = 2;
|
| 3607 |
jsop.jsop_printaddr = B_FALSE; |
| 3608 |
|
| 3609 |
i = mdb_getopts(argc, argv, |
| 3610 |
'a', MDB_OPT_SETBITS, B_TRUE, &jsop.jsop_printaddr,
|
| 3611 |
'b', MDB_OPT_SETBITS, B_TRUE, &opt_b,
|
| 3612 |
'd', MDB_OPT_UINT64, &jsop.jsop_depth, NULL); |
| 3613 |
|
| 3614 |
if (opt_b)
|
| 3615 |
jsop.jsop_baseaddr = addr; |
| 3616 |
|
| 3617 |
do {
|
| 3618 |
if (i != argc) {
|
| 3619 |
const mdb_arg_t *member = &argv[i++];
|
| 3620 |
|
| 3621 |
if (member->a_type != MDB_TYPE_STRING)
|
| 3622 |
return (DCMD_USAGE);
|
| 3623 |
|
| 3624 |
jsop.jsop_member = member->a_un.a_str; |
| 3625 |
} |
| 3626 |
|
| 3627 |
for (;;) {
|
| 3628 |
if ((buf = bufp =
|
| 3629 |
mdb_zalloc(bufsz, UM_NOSLEEP)) == NULL)
|
| 3630 |
return (DCMD_ERR);
|
| 3631 |
|
| 3632 |
jsop.jsop_bufp = &bufp; |
| 3633 |
jsop.jsop_lenp = &len; |
| 3634 |
|
| 3635 |
rv = jsobj_print(addr, &jsop); |
| 3636 |
|
| 3637 |
if (len > 0) |
| 3638 |
break;
|
| 3639 |
|
| 3640 |
mdb_free(buf, bufsz); |
| 3641 |
bufsz <<= 1;
|
| 3642 |
len = bufsz; |
| 3643 |
} |
| 3644 |
|
| 3645 |
if (jsop.jsop_member == NULL && rv != 0) |
| 3646 |
return (DCMD_ERR);
|
| 3647 |
|
| 3648 |
if (jsop.jsop_member && !jsop.jsop_found) {
|
| 3649 |
if (jsop.jsop_baseaddr)
|
| 3650 |
(void) mdb_printf("%p: ", jsop.jsop_baseaddr); |
| 3651 |
|
| 3652 |
(void) mdb_printf("undefined%s", |
| 3653 |
i < argc ? " " : ""); |
| 3654 |
} else {
|
| 3655 |
(void) mdb_printf("%s%s", buf, i < argc && |
| 3656 |
!isspace(buf[strlen(buf) - 1]) ? " " : ""); |
| 3657 |
} |
| 3658 |
|
| 3659 |
mdb_free(buf, bufsz); |
| 3660 |
jsop.jsop_found = B_FALSE; |
| 3661 |
jsop.jsop_baseaddr = NULL;
|
| 3662 |
} while (i < argc);
|
| 3663 |
|
| 3664 |
mdb_printf("\n");
|
| 3665 |
|
| 3666 |
return (DCMD_OK);
|
| 3667 |
} |
| 3668 |
|
| 3669 |
/* ARGSUSED */
|
| 3670 |
static int |
| 3671 |
dcmd_v8field(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3672 |
{
|
| 3673 |
v8_class_t *clp; |
| 3674 |
v8_field_t *flp; |
| 3675 |
const char *klass, *field; |
| 3676 |
uintptr_t offset = 0;
|
| 3677 |
|
| 3678 |
/*
|
| 3679 |
* We may be invoked with either two arguments (class and field name) or
|
| 3680 |
* three (an offset to save).
|
| 3681 |
*/
|
| 3682 |
if (argc != 2 && argc != 3) |
| 3683 |
return (DCMD_USAGE);
|
| 3684 |
|
| 3685 |
if (argv[0].a_type != MDB_TYPE_STRING || |
| 3686 |
argv[1].a_type != MDB_TYPE_STRING)
|
| 3687 |
return (DCMD_USAGE);
|
| 3688 |
|
| 3689 |
klass = argv[0].a_un.a_str;
|
| 3690 |
field = argv[1].a_un.a_str;
|
| 3691 |
|
| 3692 |
if (argc == 3) { |
| 3693 |
if (argv[2].a_type != MDB_TYPE_STRING) |
| 3694 |
return (DCMD_USAGE);
|
| 3695 |
|
| 3696 |
offset = mdb_strtoull(argv[2].a_un.a_str);
|
| 3697 |
} |
| 3698 |
|
| 3699 |
for (clp = v8_classes; clp != NULL; clp = clp->v8c_next) |
| 3700 |
if (strcmp(clp->v8c_name, klass) == 0) |
| 3701 |
break;
|
| 3702 |
|
| 3703 |
if (clp == NULL) { |
| 3704 |
(void) mdb_printf("error: no such class: \"%s\"", klass); |
| 3705 |
return (DCMD_ERR);
|
| 3706 |
} |
| 3707 |
|
| 3708 |
for (flp = clp->v8c_fields; flp != NULL; flp = flp->v8f_next) |
| 3709 |
if (strcmp(field, flp->v8f_name) == 0) |
| 3710 |
break;
|
| 3711 |
|
| 3712 |
if (flp == NULL) { |
| 3713 |
if (argc == 2) { |
| 3714 |
mdb_printf("error: no such field in class \"%s\": "
|
| 3715 |
"\"%s\"", klass, field);
|
| 3716 |
return (DCMD_ERR);
|
| 3717 |
} |
| 3718 |
|
| 3719 |
flp = conf_field_create(clp, field, offset); |
| 3720 |
if (flp == NULL) { |
| 3721 |
mdb_warn("failed to create field");
|
| 3722 |
return (DCMD_ERR);
|
| 3723 |
} |
| 3724 |
} else if (argc == 3) { |
| 3725 |
flp->v8f_offset = offset; |
| 3726 |
} |
| 3727 |
|
| 3728 |
mdb_printf("%s::%s at offset 0x%x\n", klass, field, flp->v8f_offset);
|
| 3729 |
return (DCMD_OK);
|
| 3730 |
} |
| 3731 |
|
| 3732 |
/* ARGSUSED */
|
| 3733 |
static int |
| 3734 |
dcmd_v8array(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3735 |
{
|
| 3736 |
uint8_t type; |
| 3737 |
uintptr_t *array; |
| 3738 |
size_t ii, len; |
| 3739 |
|
| 3740 |
if (read_typebyte(&type, addr) != 0) |
| 3741 |
return (DCMD_ERR);
|
| 3742 |
|
| 3743 |
if (type != V8_TYPE_FIXEDARRAY) {
|
| 3744 |
mdb_warn("%p is not an instance of FixedArray\n", addr);
|
| 3745 |
return (DCMD_ERR);
|
| 3746 |
} |
| 3747 |
|
| 3748 |
if (read_heap_array(addr, &array, &len, UM_SLEEP | UM_GC) != 0) |
| 3749 |
return (DCMD_ERR);
|
| 3750 |
|
| 3751 |
for (ii = 0; ii < len; ii++) |
| 3752 |
mdb_printf("%p\n", array[ii]);
|
| 3753 |
|
| 3754 |
return (DCMD_OK);
|
| 3755 |
} |
| 3756 |
|
| 3757 |
/* ARGSUSED */
|
| 3758 |
static int |
| 3759 |
dcmd_jsstack(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3760 |
{
|
| 3761 |
uintptr_t raddr; |
| 3762 |
boolean_t opt_v; |
| 3763 |
char *opt_f = NULL, *opt_p = NULL; |
| 3764 |
|
| 3765 |
if (mdb_getopts(argc, argv,
|
| 3766 |
'v', MDB_OPT_SETBITS, B_TRUE, &opt_v,
|
| 3767 |
'f', MDB_OPT_STR, &opt_f,
|
| 3768 |
'p', MDB_OPT_STR, &opt_p,
|
| 3769 |
NULL) != argc)
|
| 3770 |
return (DCMD_USAGE);
|
| 3771 |
|
| 3772 |
/*
|
| 3773 |
* The "::jsframe" walker iterates the valid frame pointers, but the
|
| 3774 |
* "::jsframe" dcmd looks at the frame after the one it was given, so we
|
| 3775 |
* have to explicitly examine the top frame here.
|
| 3776 |
*/
|
| 3777 |
if (!(flags & DCMD_ADDRSPEC)) {
|
| 3778 |
if (load_current_context(&addr, &raddr) != 0 || |
| 3779 |
do_jsframe(addr, raddr, opt_v, opt_f, opt_p) != 0)
|
| 3780 |
return (DCMD_ERR);
|
| 3781 |
} |
| 3782 |
|
| 3783 |
if (mdb_pwalk_dcmd("jsframe", "jsframe", argc, argv, addr) == -1) |
| 3784 |
return (DCMD_ERR);
|
| 3785 |
|
| 3786 |
return (DCMD_OK);
|
| 3787 |
} |
| 3788 |
|
| 3789 |
/* ARGSUSED */
|
| 3790 |
static int |
| 3791 |
dcmd_v8str(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3792 |
{
|
| 3793 |
boolean_t opt_v = B_FALSE; |
| 3794 |
char buf[512 * 1024]; |
| 3795 |
char *bufp;
|
| 3796 |
size_t len; |
| 3797 |
|
| 3798 |
if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, B_TRUE, &opt_v, |
| 3799 |
NULL) != argc)
|
| 3800 |
return (DCMD_USAGE);
|
| 3801 |
|
| 3802 |
bufp = buf; |
| 3803 |
len = sizeof (buf);
|
| 3804 |
if (jsstr_print(addr, (opt_v ? JSSTR_VERBOSE : JSSTR_NONE) |
|
| 3805 |
JSSTR_QUOTED, &bufp, &len) != 0)
|
| 3806 |
return (DCMD_ERR);
|
| 3807 |
|
| 3808 |
mdb_printf("%s\n", buf);
|
| 3809 |
return (DCMD_OK);
|
| 3810 |
} |
| 3811 |
|
| 3812 |
static void |
| 3813 |
dcmd_v8load_help(void)
|
| 3814 |
{
|
| 3815 |
v8_cfg_t *cfp, **cfgpp; |
| 3816 |
|
| 3817 |
mdb_printf( |
| 3818 |
"To traverse in-memory V8 structures, the V8 dmod requires\n"
|
| 3819 |
"configuration that describes the layout of various V8 structures\n"
|
| 3820 |
"in memory. Normally, this information is pulled from metadata\n"
|
| 3821 |
"in the target binary. However, it's possible to use the module\n"
|
| 3822 |
"with a binary not built with metadata by loading one of the\n"
|
| 3823 |
"canned configurations.\n\n");
|
| 3824 |
|
| 3825 |
mdb_printf("Available configurations:\n");
|
| 3826 |
|
| 3827 |
(void) mdb_inc_indent(4); |
| 3828 |
|
| 3829 |
for (cfgpp = v8_cfgs; *cfgpp != NULL; cfgpp++) { |
| 3830 |
cfp = *cfgpp; |
| 3831 |
mdb_printf("%-10s %s\n", cfp->v8cfg_name, cfp->v8cfg_label);
|
| 3832 |
} |
| 3833 |
|
| 3834 |
(void) mdb_dec_indent(4); |
| 3835 |
} |
| 3836 |
|
| 3837 |
/* ARGSUSED */
|
| 3838 |
static int |
| 3839 |
dcmd_v8load(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) |
| 3840 |
{
|
| 3841 |
v8_cfg_t *cfgp = NULL, **cfgpp;
|
| 3842 |
|
| 3843 |
if (v8_classes != NULL) { |
| 3844 |
mdb_warn("v8 module already configured\n");
|
| 3845 |
return (DCMD_ERR);
|
| 3846 |
} |
| 3847 |
|
| 3848 |
if (argc < 1 || argv->a_type != MDB_TYPE_STRING) |
| 3849 |
return (DCMD_USAGE);
|
| 3850 |
|
| 3851 |
for (cfgpp = v8_cfgs; *cfgpp != NULL; cfgpp++) { |
| 3852 |
cfgp = *cfgpp; |
| 3853 |
if (strcmp(argv->a_un.a_str, cfgp->v8cfg_name) == 0) |
| 3854 |
break;
|
| 3855 |
} |
| 3856 |
|
| 3857 |
if (cfgp == NULL || cfgp->v8cfg_name == NULL) { |
| 3858 |
mdb_warn("unknown configuration: \"%s\"\n", argv->a_un.a_str);
|
| 3859 |
return (DCMD_ERR);
|
| 3860 |
} |
| 3861 |
|
| 3862 |
if (autoconfigure(cfgp) == -1) { |
| 3863 |
mdb_warn("autoconfigure failed\n");
|
| 3864 |
return (DCMD_ERR);
|
| 3865 |
} |
| 3866 |
|
| 3867 |
mdb_printf("V8 dmod configured based on %s\n", cfgp->v8cfg_name);
|
| 3868 |
return (DCMD_OK);
|
| 3869 |
} |
| 3870 |
|
| 3871 |
static int |
| 3872 |
walk_jsframes_init(mdb_walk_state_t *wsp) |
| 3873 |
{
|
| 3874 |
if (wsp->walk_addr != NULL) |
| 3875 |
return (WALK_NEXT);
|
| 3876 |
|
| 3877 |
if (load_current_context(&wsp->walk_addr, NULL) != 0) |
| 3878 |
return (WALK_ERR);
|
| 3879 |
|
| 3880 |
return (WALK_NEXT);
|
| 3881 |
} |
| 3882 |
|
| 3883 |
static int |
| 3884 |
walk_jsframes_step(mdb_walk_state_t *wsp) |
| 3885 |
{
|
| 3886 |
uintptr_t addr, next; |
| 3887 |
int rv;
|
| 3888 |
|
| 3889 |
addr = wsp->walk_addr; |
| 3890 |
rv = wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata);
|
| 3891 |
|
| 3892 |
if (rv != WALK_NEXT)
|
| 3893 |
return (rv);
|
| 3894 |
|
| 3895 |
if (mdb_vread(&next, sizeof (next), addr) == -1) |
| 3896 |
return (WALK_ERR);
|
| 3897 |
|
| 3898 |
if (next == NULL) |
| 3899 |
return (WALK_DONE);
|
| 3900 |
|
| 3901 |
wsp->walk_addr = next; |
| 3902 |
return (WALK_NEXT);
|
| 3903 |
} |
| 3904 |
|
| 3905 |
typedef struct jsprop_walk_data { |
| 3906 |
int jspw_nprops;
|
| 3907 |
int jspw_current;
|
| 3908 |
uintptr_t *jspw_props; |
| 3909 |
} jsprop_walk_data_t; |
| 3910 |
|
| 3911 |
/*ARGSUSED*/
|
| 3912 |
static int |
| 3913 |
walk_jsprop_nprops(const char *desc, uintptr_t val, void *arg) |
| 3914 |
{
|
| 3915 |
jsprop_walk_data_t *jspw = arg; |
| 3916 |
jspw->jspw_nprops++; |
| 3917 |
|
| 3918 |
return (0); |
| 3919 |
} |
| 3920 |
|
| 3921 |
/*ARGSUSED*/
|
| 3922 |
static int |
| 3923 |
walk_jsprop_props(const char *desc, uintptr_t val, void *arg) |
| 3924 |
{
|
| 3925 |
jsprop_walk_data_t *jspw = arg; |
| 3926 |
jspw->jspw_props[jspw->jspw_current++] = val; |
| 3927 |
|
| 3928 |
return (0); |
| 3929 |
} |
| 3930 |
|
| 3931 |
static int |
| 3932 |
walk_jsprop_init(mdb_walk_state_t *wsp) |
| 3933 |
{
|
| 3934 |
jsprop_walk_data_t *jspw; |
| 3935 |
uintptr_t addr; |
| 3936 |
uint8_t type; |
| 3937 |
|
| 3938 |
if ((addr = wsp->walk_addr) == NULL) { |
| 3939 |
mdb_warn("'jsprop' does not support global walks\n");
|
| 3940 |
return (WALK_ERR);
|
| 3941 |
} |
| 3942 |
|
| 3943 |
if (!V8_IS_HEAPOBJECT(addr) || read_typebyte(&type, addr) != 0 || |
| 3944 |
type != V8_TYPE_JSOBJECT) {
|
| 3945 |
mdb_warn("%p is not a JSObject\n", addr);
|
| 3946 |
return (WALK_ERR);
|
| 3947 |
} |
| 3948 |
|
| 3949 |
jspw = mdb_zalloc(sizeof (jsprop_walk_data_t), UM_SLEEP | UM_GC);
|
| 3950 |
|
| 3951 |
if (jsobj_properties(addr, walk_jsprop_nprops, jspw) == -1) { |
| 3952 |
mdb_warn("couldn't iterate over properties for %p\n", addr);
|
| 3953 |
return (WALK_ERR);
|
| 3954 |
} |
| 3955 |
|
| 3956 |
jspw->jspw_props = mdb_zalloc(jspw->jspw_nprops * |
| 3957 |
sizeof (uintptr_t), UM_SLEEP | UM_GC);
|
| 3958 |
|
| 3959 |
if (jsobj_properties(addr, walk_jsprop_props, jspw) == -1) { |
| 3960 |
mdb_warn("couldn't iterate over properties for %p\n", addr);
|
| 3961 |
return (WALK_ERR);
|
| 3962 |
} |
| 3963 |
|
| 3964 |
jspw->jspw_current = 0;
|
| 3965 |
wsp->walk_data = jspw; |
| 3966 |
|
| 3967 |
return (WALK_NEXT);
|
| 3968 |
} |
| 3969 |
|
| 3970 |
static int |
| 3971 |
walk_jsprop_step(mdb_walk_state_t *wsp) |
| 3972 |
{
|
| 3973 |
jsprop_walk_data_t *jspw = wsp->walk_data; |
| 3974 |
int rv;
|
| 3975 |
|
| 3976 |
if (jspw->jspw_current >= jspw->jspw_nprops)
|
| 3977 |
return (WALK_DONE);
|
| 3978 |
|
| 3979 |
if ((rv = wsp->walk_callback(jspw->jspw_props[jspw->jspw_current++],
|
| 3980 |
NULL, wsp->walk_cbdata)) != WALK_NEXT)
|
| 3981 |
return (rv);
|
| 3982 |
|
| 3983 |
return (WALK_NEXT);
|
| 3984 |
} |
| 3985 |
|
| 3986 |
/*
|
| 3987 |
* MDB linkage
|
| 3988 |
*/
|
| 3989 |
|
| 3990 |
static const mdb_dcmd_t v8_mdb_dcmds[] = { |
| 3991 |
/*
|
| 3992 |
* Commands to inspect JavaScript-level state
|
| 3993 |
*/
|
| 3994 |
{ "jsframe", ":[-iv] [-f function] [-p property]",
|
| 3995 |
"summarize a JavaScript stack frame", dcmd_jsframe },
|
| 3996 |
{ "jsprint", ":[-ab] [-d depth] [member]", "print a JavaScript object",
|
| 3997 |
dcmd_jsprint }, |
| 3998 |
{ "jsstack", "[-v] [-f function] [-p property]",
|
| 3999 |
"print a JavaScript stacktrace", dcmd_jsstack },
|
| 4000 |
{ "findjsobjects", "?[-vb] [-r | -c cons | -p prop]", "find JavaScript "
|
| 4001 |
"objects", dcmd_findjsobjects, dcmd_findjsobjects_help },
|
| 4002 |
|
| 4003 |
/*
|
| 4004 |
* Commands to inspect V8-level state
|
| 4005 |
*/
|
| 4006 |
{ "v8array", ":", "print elements of a V8 FixedArray",
|
| 4007 |
dcmd_v8array }, |
| 4008 |
{ "v8classes", NULL, "list known V8 heap object C++ classes",
|
| 4009 |
dcmd_v8classes }, |
| 4010 |
{ "v8code", ":[-d]", "print information about a V8 Code object",
|
| 4011 |
dcmd_v8code }, |
| 4012 |
{ "v8field", "classname fieldname offset",
|
| 4013 |
"manually add a field to a given class", dcmd_v8field },
|
| 4014 |
{ "v8function", ":[-d]", "print JSFunction object details",
|
| 4015 |
dcmd_v8function }, |
| 4016 |
{ "v8load", "version", "load canned config for a specific V8 version",
|
| 4017 |
dcmd_v8load, dcmd_v8load_help }, |
| 4018 |
{ "v8frametypes", NULL, "list known V8 frame types",
|
| 4019 |
dcmd_v8frametypes }, |
| 4020 |
{ "v8print", ":[class]", "print a V8 heap object",
|
| 4021 |
dcmd_v8print, dcmd_v8print_help }, |
| 4022 |
{ "v8str", ":[-v]", "print the contents of a V8 string",
|
| 4023 |
dcmd_v8str }, |
| 4024 |
{ "v8type", ":", "print the type of a V8 heap object",
|
| 4025 |
dcmd_v8type }, |
| 4026 |
{ "v8types", NULL, "list known V8 heap object types",
|
| 4027 |
dcmd_v8types }, |
| 4028 |
|
| 4029 |
{ NULL }
|
| 4030 |
}; |
| 4031 |
|
| 4032 |
static const mdb_walker_t v8_mdb_walkers[] = { |
| 4033 |
{ "jsframe", "walk V8 JavaScript stack frames",
|
| 4034 |
walk_jsframes_init, walk_jsframes_step }, |
| 4035 |
{ "jsprop", "walk property values for an object",
|
| 4036 |
walk_jsprop_init, walk_jsprop_step }, |
| 4037 |
{ NULL }
|
| 4038 |
}; |
| 4039 |
|
| 4040 |
static mdb_modinfo_t v8_mdb = { MDB_API_VERSION, v8_mdb_dcmds, v8_mdb_walkers };
|
| 4041 |
|
| 4042 |
static void |
| 4043 |
configure(void)
|
| 4044 |
{
|
| 4045 |
char *success;
|
| 4046 |
v8_cfg_t *cfgp = NULL;
|
| 4047 |
GElf_Sym sym; |
| 4048 |
|
| 4049 |
if (mdb_readsym(&v8_major, sizeof (v8_major), |
| 4050 |
"_ZN2v88internal7Version6major_E") == -1 || |
| 4051 |
mdb_readsym(&v8_minor, sizeof (v8_minor),
|
| 4052 |
"_ZN2v88internal7Version6minor_E") == -1 || |
| 4053 |
mdb_readsym(&v8_build, sizeof (v8_build),
|
| 4054 |
"_ZN2v88internal7Version6build_E") == -1 || |
| 4055 |
mdb_readsym(&v8_patch, sizeof (v8_patch),
|
| 4056 |
"_ZN2v88internal7Version6patch_E") == -1) { |
| 4057 |
mdb_warn("failed to determine V8 version");
|
| 4058 |
return;
|
| 4059 |
} |
| 4060 |
|
| 4061 |
mdb_printf("V8 version: %d.%d.%d.%d\n",
|
| 4062 |
v8_major, v8_minor, v8_build, v8_patch); |
| 4063 |
|
| 4064 |
/*
|
| 4065 |
* First look for debug metadata embedded within the binary, which may
|
| 4066 |
* be present in recent V8 versions built with postmortem metadata.
|
| 4067 |
*/
|
| 4068 |
if (mdb_lookup_by_name("v8dbg_SmiTag", &sym) == 0) { |
| 4069 |
cfgp = &v8_cfg_target; |
| 4070 |
success = "Autoconfigured V8 support from target";
|
| 4071 |
} else if (v8_major == 3 && v8_minor == 1 && v8_build == 8) { |
| 4072 |
cfgp = &v8_cfg_04; |
| 4073 |
success = "Configured V8 support based on node v0.4";
|
| 4074 |
} else if (v8_major == 3 && v8_minor == 6 && v8_build == 6) { |
| 4075 |
cfgp = &v8_cfg_06; |
| 4076 |
success = "Configured V8 support based on node v0.6";
|
| 4077 |
} else {
|
| 4078 |
mdb_printf("mdb_v8: target has no debug metadata and "
|
| 4079 |
"no existing config found\n");
|
| 4080 |
return;
|
| 4081 |
} |
| 4082 |
|
| 4083 |
if (autoconfigure(cfgp) != 0) { |
| 4084 |
mdb_warn("failed to autoconfigure from target; "
|
| 4085 |
"commands may have incorrect results!\n");
|
| 4086 |
return;
|
| 4087 |
} |
| 4088 |
|
| 4089 |
mdb_printf("%s\n", success);
|
| 4090 |
} |
| 4091 |
|
| 4092 |
static void |
| 4093 |
enable_demangling(void)
|
| 4094 |
{
|
| 4095 |
const char *symname = "_ZN2v88internal7Version6major_E"; |
| 4096 |
GElf_Sym sym; |
| 4097 |
char buf[64]; |
| 4098 |
|
| 4099 |
/*
|
| 4100 |
* Try to determine whether C++ symbol demangling has been enabled. If
|
| 4101 |
* not, enable it.
|
| 4102 |
*/
|
| 4103 |
if (mdb_lookup_by_name("_ZN2v88internal7Version6major_E", &sym) != 0) |
| 4104 |
return;
|
| 4105 |
|
| 4106 |
(void) mdb_snprintf(buf, sizeof (buf), "%a", sym.st_value); |
| 4107 |
if (strstr(buf, symname) != NULL) |
| 4108 |
(void) mdb_eval("$G"); |
| 4109 |
} |
| 4110 |
|
| 4111 |
const mdb_modinfo_t *
|
| 4112 |
_mdb_init(void)
|
| 4113 |
{
|
| 4114 |
configure(); |
| 4115 |
enable_demangling(); |
| 4116 |
return (&v8_mdb);
|
| 4117 |
} |