Add top-level exception handler on Windows to dump stack traces

runtime/vm/profiler.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/address_sanitizer.h"
 #include "platform/memory_sanitizer.h"
 #include "platform/utils.h"
 
 #include "vm/allocation.h"
 #include "vm/atomic.h"
@@ skipping 1058 matching lines @@
 
 
 void Profiler::DumpStackTrace(void* context) {
 #if defined(HOST_OS_LINUX) || defined(HOST_OS_MACOS)
   ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
   mcontext_t mcontext = ucontext->uc_mcontext;
   uword pc = SignalHandler::GetProgramCounter(mcontext);
   uword fp = SignalHandler::GetFramePointer(mcontext);
   uword sp = SignalHandler::GetCStackPointer(mcontext);
   DumpStackTrace(sp, fp, pc, true /* for_crash */);
+#elif defined(HOST_OS_WINDOWS)
+  CONTEXT* ctx = reinterpret_cast<CONTEXT*>(context);
+#if defined(HOST_ARCH_IA32)
+  uword pc = static_cast<uword>(ctx->Eip);
+  uword fp = static_cast<uword>(ctx->Ebp);
+  uword sp = static_cast<uword>(ctx->Esp);
+#elif defined(HOST_ARCH_X64)
+  uword pc = static_cast<uword>(ctx->Rip);
+  uword fp = static_cast<uword>(ctx->Rbp);
+  uword sp = static_cast<uword>(ctx->Rsp);
+#else
+#error Unsupported architecture.
+#endif
+  DumpStackTrace(sp, fp, pc, true /* for_crash */);
 #else
 // TODO(fschneider): Add support for more platforms.
 // Do nothing on unsupported platforms.
 #endif
 }
 
 
 void Profiler::DumpStackTrace(bool for_crash) {
   uintptr_t sp = Thread::GetCurrentStackPointer();
   uintptr_t fp = 0;
@@ skipping 632 matching lines @@
 
 
 ProcessedSampleBuffer::ProcessedSampleBuffer()
     : code_lookup_table_(new CodeLookupTable(Thread::Current())) {
   ASSERT(code_lookup_table_ != NULL);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart