Revision f230a1cf deps/v8/src/platform-cygwin.cc

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deps/v8/src/platform-cygwin.cc
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#include "v8.h"
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#include "platform-posix.h"
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#include "platform.h"
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#include "simulator.h"
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#include "v8threads.h"
......
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}
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void OS::DumpBacktrace() {
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  // Currently unsupported.
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}
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class PosixMemoryMappedFile : public OS::MemoryMappedFile {
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 public:
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  PosixMemoryMappedFile(FILE* file, void* memory, int size)
......
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}
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int OS::StackWalk(Vector<OS::StackFrame> frames) {
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  // Not supported on Cygwin.
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  return 0;
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}
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// The VirtualMemory implementation is taken from platform-win32.cc.
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// The mmap-based virtual memory implementation as it is used on most posix
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// platforms does not work well because Cygwin does not support MAP_FIXED.

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