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Unified Diff: runtime/vm/stub_code_ia32.cc

Issue 106053011: Make return statements single steppable (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 6 years, 12 months ago
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Index: runtime/vm/stub_code_ia32.cc
===================================================================
--- runtime/vm/stub_code_ia32.cc (revision 31428)
+++ runtime/vm/stub_code_ia32.cc (working copy)
@@ -1938,6 +1938,23 @@
}
+// Called only from unoptimized code.
+void StubCode::GenerateDebugStepCheckStub(Assembler* assembler) {
+ // Check single stepping.
+ Label not_stepping;
+ __ movl(EAX, FieldAddress(CTX, Context::isolate_offset()));
+ __ movzxb(EAX, Address(EAX, Isolate::single_step_offset()));
+ __ cmpl(EAX, Immediate(0));
+ __ j(EQUAL, &not_stepping, Assembler::kNearJump);
+
+ __ EnterStubFrame();
+ __ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
+ __ LeaveFrame();
+ __ Bind(&not_stepping);
+ __ ret();
+}
+
+
// Used to check class and type arguments. Arguments passed on stack:
// TOS + 0: return address.
// TOS + 1: instantiator type arguments (can be NULL).
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