regis@google.com
a577991ad5
Review URL: http://codereview.chromium.org//8984003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@2557 260f80e4-7a28-3924-810f-c04153c831b5
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_X64)
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#include "vm/instructions.h"
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#include "vm/isolate.h"
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#include "vm/stack_frame.h"
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namespace dart {
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// The constant kExitLinkOffsetInEntryFrame must be kept in sync with the
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// code in the InvokeDartCode stub.
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static const int kExitLinkOffsetInEntryFrame = -8 * kWordSize;
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static const int kPcAddressOffsetFromSp = -1 * kWordSize;
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static const int kSpOffsetFromPreviousFp = 2 * kWordSize;
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static bool ExitedFromStub(uword exit_marker) {
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if (exit_marker != 0) {
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uword caller_pc = *reinterpret_cast<uword*>(exit_marker + kWordSize);
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uword call_instr_pc = caller_pc - Call::InstructionLength();
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uword call_target = Call(call_instr_pc).TargetAddress();
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return StubCode::InStubCallToRuntimeStubCode(call_target);
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}
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return false;
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}
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intptr_t StackFrame::PcAddressOffsetFromSp() {
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return kPcAddressOffsetFromSp;
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}
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uword StackFrame::GetCallerSp() const {
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return fp() + kSpOffsetFromPreviousFp;
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}
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uword StackFrame::GetCallerFp() const {
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return *(reinterpret_cast<uword*>(fp()));
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}
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intptr_t EntryFrame::ExitLinkOffset() {
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return kExitLinkOffsetInEntryFrame;
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}
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void StackFrameIterator::SetupLastExitFrameData() {
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Isolate* current = Isolate::Current();
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uword exit_marker = current->top_exit_frame_info();
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frames_.fp_ = exit_marker;
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frames_.from_stub_exitframe_ = ExitedFromStub(exit_marker);
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}
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void StackFrameIterator::SetupNextExitFrameData() {
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uword exit_address = entry_.fp() + kExitLinkOffsetInEntryFrame;
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uword exit_marker = *reinterpret_cast<uword*>(exit_address);
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frames_.fp_ = exit_marker;
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frames_.from_stub_exitframe_ = ExitedFromStub(exit_marker);
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frames_.sp_ = 0;
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}
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} // namespace dart
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#endif // defined TARGET_ARCH_X64
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