Hook up custom Win 64 SEH to v8

components/crash/app/breakpad_win.cc

Index: components/crash/app/breakpad_win.cc
diff --git a/components/crash/app/breakpad_win.cc b/components/crash/app/breakpad_win.cc
index b0dba9899e593ca3967444c2b5bf713293dc96d0..1dc5fbcdee3f54b7fd1b269a403c4525c4bce966 100644
--- a/components/crash/app/breakpad_win.cc
+++ b/components/crash/app/breakpad_win.cc
@@ -611,4 +611,35 @@ extern "C" void __declspec(dllexport) __cdecl
   env->UnSetVar(kPipeNameVar);
 }
 
+#ifdef _WIN64
+PRUNTIME_FUNCTION GetRuntimeFunctionCallback(DWORD64 ControlPC, PVOID Context) {
+  if (g_breakpad) {
+    g_breakpad->WriteMinidump();
+    // Patched stub exists based on conditions (See InitCrashReporter).
+    // As a side note this function also gets called from
+    // WindowProcExceptionFilter.
+    if (g_real_terminate_process_stub == NULL) {
+      ::TerminateProcess(::GetCurrentProcess(), content::RESULT_CODE_KILLED);
+    } else {
+      NtTerminateProcessPtr real_terminate_proc =
+          reinterpret_cast<NtTerminateProcessPtr>(
+              static_cast<char*>(g_real_terminate_process_stub));
+      real_terminate_proc(::GetCurrentProcess(), content::RESULT_CODE_KILLED);
+    }
+  }
+  return NULL;
+}
+
+extern "C" void __declspec(dllexport) __cdecl
+RegisterNonABICompliantCodeRange(void* start, size_t size_in_bytes) {
+  RtlInstallFunctionTableCallback(
+      reinterpret_cast<DWORD64>(start) | 0x3,  // Required by API.
+      reinterpret_cast<DWORD64>(start),
+      static_cast<DWORD>(size_in_bytes),

[Will Harris, 2014/09/30 20:39:59]

check limits here during size_t -> DWORD conversion

+      GetRuntimeFunctionCallback,
+      NULL,
+      NULL);
+}
+#endif
+
 }  // namespace breakpad