CSE2410 Fall 2014 Bounce

// Copyright 2006-2008 the V8 project authors. All rights reserved.

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

//       copyright notice, this list of conditions and the following

//       disclaimer in the documentation and/or other materials provided

//       with the distribution.

//     * Neither the name of Google Inc. nor the names of its

//       contributors may be used to endorse or promote products derived

//       from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "checks.h"

#if V8_LIBC_GLIBC || V8_OS_BSD

# include <cxxabi.h>

# include <execinfo.h>

#endif  // V8_LIBC_GLIBC || V8_OS_BSD

#include <stdio.h>

#include "platform.h"

#include "v8.h"

// Attempts to dump a backtrace (if supported).

static V8_INLINE void DumpBacktrace() {

#if V8_LIBC_GLIBC || V8_OS_BSD

  void* trace[100];

  int size = backtrace(trace, ARRAY_SIZE(trace));

  char** symbols = backtrace_symbols(trace, size);

  i::OS::PrintError("\n==== C stack trace ===============================\n\n");

  if (size == 0) {

    i::OS::PrintError("(empty)\n");

  } else if (symbols == NULL) {

    i::OS::PrintError("(no symbols)\n");

  } else {

    for (int i = 1; i < size; ++i) {

      i::OS::PrintError("%2d: ", i);

      char mangled[201];

      if (sscanf(symbols[i], "%*[^(]%*[(]%200[^)+]", mangled) == 1) {  // NOLINT

        int status;

        size_t length;

        char* demangled = abi::__cxa_demangle(mangled, NULL, &length, &status);

        i::OS::PrintError("%s\n", demangled != NULL ? demangled : mangled);

        free(demangled);

      } else {

        i::OS::PrintError("??\n");

      }

    }

  }

  free(symbols);

#endif  // V8_LIBC_GLIBC || V8_OS_BSD

}

// Contains protection against recursive calls (faults while handling faults).

extern "C" void V8_Fatal(const char* file, int line, const char* format, ...) {

  i::AllowHandleDereference allow_deref;

  i::AllowDeferredHandleDereference allow_deferred_deref;

  fflush(stdout);

  fflush(stderr);

  i::OS::PrintError("\n\n#\n# Fatal error in %s, line %d\n# ", file, line);

  va_list arguments;

  va_start(arguments, format);

  i::OS::VPrintError(format, arguments);

  va_end(arguments);

  i::OS::PrintError("\n#\n");

  DumpBacktrace();

  fflush(stderr);

  i::OS::Abort();

}

void CheckEqualsHelper(const char* file,

                       int line,

                       const char* expected_source,

                       v8::Handle<v8::Value> expected,

                       const char* value_source,

                       v8::Handle<v8::Value> value) {

  if (!expected->Equals(value)) {

    v8::String::Utf8Value value_str(value);

    v8::String::Utf8Value expected_str(expected);

    V8_Fatal(file, line,

             "CHECK_EQ(%s, %s) failed\n#   Expected: %s\n#   Found: %s",

             expected_source, value_source, *expected_str, *value_str);

  }

}

void CheckNonEqualsHelper(const char* file,

                          int line,

                          const char* unexpected_source,

                          v8::Handle<v8::Value> unexpected,

                          const char* value_source,

                          v8::Handle<v8::Value> value) {

  if (unexpected->Equals(value)) {

    v8::String::Utf8Value value_str(value);

    V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n#   Value: %s",

             unexpected_source, value_source, *value_str);

  }

}

void API_Fatal(const char* location, const char* format, ...) {

  i::OS::PrintError("\n#\n# Fatal error in %s\n# ", location);

  va_list arguments;

  va_start(arguments, format);

  i::OS::VPrintError(format, arguments);

  va_end(arguments);

  i::OS::PrintError("\n#\n\n");

  i::OS::Abort();

}

namespace v8 { namespace internal {

  intptr_t HeapObjectTagMask() { return kHeapObjectTagMask; }

} }  // namespace v8::internal