Patch CEntry stub to swallow exception if liveedit/restart frame needs it.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 202d7abd9f480fa612590ed8dfa6ebd110822885..6c24980a3a3f822acac5cb1dac54912b1f138dd6 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -4595,6 +4595,23 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   __ ThrowUncatchable(eax);
 
   __ bind(&throw_normal_exception);
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  Label proceed_throwing;
+  ExternalReference c_entry_frame_to_ignore_exception =
+      ExternalReference(Debug_Address::CEntryFrameToIgnoreException(),
+          masm->isolate());
+
+  __ cmp(ebp, Operand::StaticVariable(c_entry_frame_to_ignore_exception));
+  __ j(not_equal, &proceed_throwing, Label::kNear);
+  __ mov(Operand::StaticVariable(c_entry_frame_to_ignore_exception),
+         Immediate(0));
+  __ LeaveExitFrame(save_doubles_ == kSaveFPRegs);
+  __ ret(0);
+
+  __ bind(&proceed_throwing);
+#endif  // ENABLE_DEBUGGER_SUPPORT
+
   __ Throw(eax);
 }