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Unified Diff: src/ic/arm/ic-arm.cc

Issue 1168093002: [strong] Implement strong mode restrictions on property access (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: rebase Created 5 years, 6 months ago
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Index: src/ic/arm/ic-arm.cc
diff --git a/src/ic/arm/ic-arm.cc b/src/ic/arm/ic-arm.cc
index 3ecdc31a62afcf819eba27ae786ce199abcc505d..e61555abd88a34293dca56c7a563a2d381e72a13 100644
--- a/src/ic/arm/ic-arm.cc
+++ b/src/ic/arm/ic-arm.cc
@@ -161,7 +161,8 @@ static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm,
static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver,
Register key, Register elements,
Register scratch1, Register scratch2,
- Register result, Label* slow) {
+ Register result, Label* slow,
+ LanguageMode language_mode) {
// Register use:
//
// receiver - holds the receiver on entry.
@@ -183,7 +184,7 @@ static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver,
//
// scratch2 - used to hold maps, prototypes, and the loaded value.
Label check_prototypes, check_next_prototype;
- Label done, in_bounds, return_undefined;
+ Label done, in_bounds, absent;
__ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
__ AssertFastElements(elements);
@@ -202,7 +203,7 @@ static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver,
__ ldr(scratch2, FieldMemOperand(scratch2, Map::kPrototypeOffset));
// scratch2: current prototype
__ CompareRoot(scratch2, Heap::kNullValueRootIndex);
- __ b(eq, &return_undefined);
+ __ b(eq, &absent);
__ ldr(elements, FieldMemOperand(scratch2, JSObject::kElementsOffset));
__ ldr(scratch2, FieldMemOperand(scratch2, HeapObject::kMapOffset));
// elements: elements of current prototype
@@ -217,9 +218,14 @@ static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver,
__ b(ne, slow);
__ jmp(&check_next_prototype);
- __ bind(&return_undefined);
- __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
- __ jmp(&done);
+ __ bind(&absent);
+ if (is_strong(language_mode)) {
+ // Strong mode accesses must throw in this case, so call the runtime.
+ __ jmp(slow);
+ } else {
+ __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
+ __ jmp(&done);
+ }
__ bind(&in_bounds);
// Fast case: Do the load.
@@ -278,7 +284,7 @@ void LoadIC::GenerateNormal(MacroAssembler* masm) {
// Dictionary load failed, go slow (but don't miss).
__ bind(&slow);
- GenerateRuntimeGetProperty(masm);
+ GenerateSlow(masm);
}
@@ -313,13 +319,17 @@ void LoadIC::GenerateMiss(MacroAssembler* masm) {
}
-void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
+void LoadIC::GenerateSlow(MacroAssembler* masm) {
// The return address is in lr.
__ mov(LoadIC_TempRegister(), LoadDescriptor::ReceiverRegister());
__ Push(LoadIC_TempRegister(), LoadDescriptor::NameRegister());
- __ TailCallRuntime(Runtime::kGetProperty, 2, 1);
+ // Perform tail call to the entry.
+ ExternalReference ref =
+ ExternalReference(IC_Utility(kLoadIC_Slow), masm->isolate());
+ int arg_count = 2;
+ __ TailCallExternalReference(ref, arg_count, 1);
}
@@ -341,16 +351,21 @@ void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
}
-void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
+void KeyedLoadIC::GenerateSlow(MacroAssembler* masm) {
// The return address is in lr.
__ Push(LoadDescriptor::ReceiverRegister(), LoadDescriptor::NameRegister());
- __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
+ // Perform tail call to the entry.
+ ExternalReference ref =
+ ExternalReference(IC_Utility(kKeyedLoadIC_Slow), masm->isolate());
+ int arg_count = 2;
+ __ TailCallExternalReference(ref, arg_count, 1);
}
-void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm) {
+void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm,
+ LanguageMode language_mode) {
// The return address is in lr.
Label slow, check_name, index_smi, index_name, property_array_property;
Label probe_dictionary, check_number_dictionary;
@@ -374,7 +389,8 @@ void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm) {
// Check the receiver's map to see if it has fast elements.
__ CheckFastElements(r0, r3, &check_number_dictionary);
- GenerateFastArrayLoad(masm, receiver, key, r0, r3, r4, r0, &slow);
+ GenerateFastArrayLoad(masm, receiver, key, r0, r3, r4, r0, &slow,
+ language_mode);
__ IncrementCounter(isolate->counters()->keyed_load_generic_smi(), 1, r4, r3);
__ Ret();
@@ -396,7 +412,7 @@ void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm) {
__ bind(&slow);
__ IncrementCounter(isolate->counters()->keyed_load_generic_slow(), 1, r4,
r3);
- GenerateRuntimeGetProperty(masm);
+ GenerateSlow(masm);
__ bind(&check_name);
GenerateKeyNameCheck(masm, key, r0, r3, &index_name, &slow);
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