asiva@google.com
80e281a078
- Read the saved context from the entry frame when straddling across C++ frames while iterating over a stack trace in the debugger. This ensures that the correct context is setup in the ActivationFrame structure in these scenarios (instead of the empty context). - Read the saved context from the caller's frame when iterating over a stack trace in the debugger. The compiler saves the context in the caller frame before invoking closures, we read this saved context when iterating the stack trace. Review URL: https://codereview.chromium.org//12179020 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18235 260f80e4-7a28-3924-810f-c04153c831b5
64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
// Copyright (c) 2012, 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_IA32)
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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 kSavedContextOffsetInEntryFrame = -5 * kWordSize;
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static const int kExitLinkOffsetInEntryFrame = -4 * 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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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() const {
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return kExitLinkOffsetInEntryFrame;
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}
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intptr_t EntryFrame::SavedContextOffset() const {
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return kSavedContextOffsetInEntryFrame;
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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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}
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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_.sp_ = 0;
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}
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} // namespace dart
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#endif // defined TARGET_ARCH_IA32
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