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X87: Remove code object from StackHandler.

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port e0aa8ebf93 (r27103).

original commit message:

  This reduces the size of the StackHandler by one word. We no longer
  need to keep track of the code object, as the stack walk finds it.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/1022403002

Cr-Commit-Position: refs/heads/master@{#27353}
This commit is contained in:
cdai2 2015-03-23 16:27:36 +08:00
parent fd51f615eb
commit 289ee15307
1 changed files with 5 additions and 7 deletions
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12
src/x87/macro-assembler-x87.cc
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@ -990,12 +990,11 @@ void MacroAssembler::LeaveApiExitFrame(bool restore_context) {
void MacroAssembler::PushTryHandler(StackHandler::Kind kind,
int handler_index) {
// Adjust this code if not the case.
STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0);
STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kContextOffset == 2 * kPointerSize);
STATIC_ASSERT(StackHandlerConstants::kFPOffset == 3 * kPointerSize);
// We will build up the handler from the bottom by pushing on the stack.
// First push the frame pointer and context.
@ -1009,12 +1008,11 @@ void MacroAssembler::PushTryHandler(StackHandler::Kind kind,
push(ebp);
push(esi);
}
// Push the state and the code object.
// Push the state.
unsigned state =
StackHandler::IndexField::encode(handler_index) |
StackHandler::KindField::encode(kind);
push(Immediate(state));
Push(CodeObject());
// Link the current handler as the next handler.
ExternalReference handler_address(Isolate::kHandlerAddress, isolate());