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Unified Diff: src/x64/debug-x64.cc

Issue 155286: X64: Let debugger patch JSReturn with a debug break. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 11 years, 5 months ago
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Index: src/x64/debug-x64.cc
===================================================================
--- src/x64/debug-x64.cc (revision 2419)
+++ src/x64/debug-x64.cc (working copy)
@@ -38,8 +38,10 @@
#ifdef ENABLE_DEBUGGER_SUPPORT
bool Debug::IsDebugBreakAtReturn(v8::internal::RelocInfo* rinfo) {
- UNIMPLEMENTED();
- return false;
+ ASSERT(RelocInfo::IsJSReturn(rinfo->rmode()));
+ // 11th byte of patch is 0x49, 11th byte of JS return is 0xCC (int3).
+ ASSERT(*(rinfo->pc() + 10) == 0x49 || *(rinfo->pc() + 10) == 0xCC);
+ return (*(rinfo->pc() + 10) == 0x49);
}
void Debug::GenerateCallICDebugBreak(MacroAssembler* masm) {
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