Use RtlCaptureContext instead of inline assembly to capture execution context...

src/platform-win32.cc

 // 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
@@ skipping 30 matching lines @@
 #endif
 #ifndef NOSERVICE
 #define NOSERVICE
 #endif
 #ifndef NOSOUND
 #define NOSOUND
 #endif
 #ifndef NOMCX
 #define NOMCX
 #endif
-// Require Windows 2000 or higher (this is required for the IsDebuggerPresent
+// Require Windows XP or higher (this is required for the RtlCaptureContext
 // function to be present).
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x500
+#define _WIN32_WINNT 0x501
 #endif
 
 #include <windows.h>
 
 #include <time.h>  // For LocalOffset() implementation.
 #include <mmsystem.h>  // For timeGetTime().
 #ifdef __MINGW32__
 // Require Windows XP or higher when compiling with MinGW. This is for MinGW
 // header files to expose getaddrinfo.
 #undef _WIN32_WINNT
@@ skipping 1111 matching lines @@
 
   // Get the process and thread handles.
   HANDLE process_handle = GetCurrentProcess();
   HANDLE thread_handle = GetCurrentThread();
 
   // Read the symbols.
   if (!LoadSymbols(process_handle)) return kStackWalkError;
 
   // Capture current context.
   CONTEXT context;
-  memset(&context, 0, sizeof(context));
-  context.ContextFlags = CONTEXT_CONTROL;
-  context.ContextFlags = CONTEXT_CONTROL;
-#ifdef  _WIN64
-  // TODO(X64): Implement context capture.
-#else
-  __asm    call x
-  __asm x: pop eax
-  __asm    mov context.Eip, eax
-  __asm    mov context.Ebp, ebp
-  __asm    mov context.Esp, esp
-  // NOTE: At some point, we could use RtlCaptureContext(&context) to
-  // capture the context instead of inline assembler. However it is
-  // only available on XP, Vista, Server 2003 and Server 2008 which
-  // might not be sufficient.
-#endif
+  RtlCaptureContext(&context);
 
   // Initialize the stack walking
   STACKFRAME64 stack_frame;
   memset(&stack_frame, 0, sizeof(stack_frame));
 #ifdef  _WIN64
   stack_frame.AddrPC.Offset = context.Rip;
   stack_frame.AddrFrame.Offset = context.Rbp;
   stack_frame.AddrStack.Offset = context.Rsp;
 #else
   stack_frame.AddrPC.Offset = context.Eip;
@@ skipping 668 matching lines @@
 
   // Release the thread handles
   CloseHandle(data_->sampler_thread_);
   CloseHandle(data_->profiled_thread_);
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal