Index: runtime/vm/stub_code_x64.cc |
diff --git a/runtime/vm/stub_code_x64.cc b/runtime/vm/stub_code_x64.cc |
index 7367a5ff836cb3965454f4d225608f311642e8fc..cdd7bcd3b783aabb829306e1bdc396bab376da20 100644 |
--- a/runtime/vm/stub_code_x64.cc |
+++ b/runtime/vm/stub_code_x64.cc |
@@ -83,7 +83,6 @@ void StubCode::GenerateCallToRuntimeStub(Assembler* assembler) { |
__ movq(Address(RSP, isolate_offset), CTX); // Set isolate in NativeArgs. |
// There are no runtime calls to closures, so we do not need to set the tag |
// bits kClosureFunctionBit and kInstanceFunctionBit in argc_tag_. |
- __ SmiUntag(R10); |
__ movq(Address(RSP, argc_tag_offset), R10); // Set argc in NativeArguments. |
__ leaq(RAX, Address(RBP, R10, TIMES_8, 1 * kWordSize)); // Compute argv. |
__ movq(Address(RSP, argv_offset), RAX); // Set argv in NativeArguments. |
@@ -1554,9 +1553,29 @@ void StubCode::GenerateLazyCompileStub(Assembler* assembler) { |
} |
-// RBX, R10: May contain arguments to runtime stub. |
-// TOS(0): return address (Dart code). |
-void StubCode::GenerateBreakpointRuntimeStub(Assembler* assembler) { |
+// RBX: Contains an ICData. |
+// TOS(0): return address (Dart code). |
+void StubCode::GenerateICCallBreakpointStub(Assembler* assembler) { |
+ __ EnterStubFrame(); |
+ // Preserve IC data. |
+ __ pushq(RBX); |
+ // Room for result. Debugger stub returns address of the |
+ // unpatched runtime stub. |
+ __ LoadObject(R12, Object::null_object(), PP); |
+ __ pushq(R12); // Room for result. |
+ __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0); |
+ __ popq(RAX); // Address of original. |
+ __ popq(RBX); // Restore IC data. |
+ __ LeaveStubFrame(); |
+ __ jmp(RAX); // Jump to original stub. |
+} |
+ |
+ |
+// RBX: Contains Smi 0 (need to preserve a GC-safe value for the lazy compile |
+// stub). |
+// R10: Contains an arguments descriptor. |
+// TOS(0): return address (Dart code). |
+void StubCode::GenerateClosureCallBreakpointStub(Assembler* assembler) { |
__ EnterStubFrame(); |
// Preserve runtime args. |
__ pushq(RBX); |
@@ -1574,6 +1593,20 @@ void StubCode::GenerateBreakpointRuntimeStub(Assembler* assembler) { |
} |
+// TOS(0): return address (Dart code). |
+void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) { |
+ __ EnterStubFrame(); |
+ // Room for result. Debugger stub returns address of the |
+ // unpatched runtime stub. |
+ __ LoadObject(R12, Object::null_object(), PP); |
+ __ pushq(R12); // Room for result. |
+ __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0); |
+ __ popq(RAX); // Address of original. |
+ __ LeaveStubFrame(); |
+ __ jmp(RAX); // Jump to original stub. |
+} |
+ |
+ |
// Called only from unoptimized code. |
void StubCode::GenerateDebugStepCheckStub(Assembler* assembler) { |
if (FLAG_enable_debugger) { |