Ryan Macnak
524fbc1e0f
Retain the recursive-descent format for script and message snapshots. Flutter gallery app on a Nexus 4 - Snapshot, excluding instruction/rodata sections 3429177 -> 2874997B (-16%) - InitOnce 54.1 -> 8.4ms (-84%) - InitializeIsolate 374.3 -> 170.8ms (-54%) R=asiva@google.com Review URL: https://codereview.chromium.org/2032153003 .
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
// Copyright (c) 2013, 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 "lib/stacktrace.h"
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#include "vm/bootstrap_natives.h"
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#include "vm/exceptions.h"
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#include "vm/object_store.h"
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#include "vm/runtime_entry.h"
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#include "vm/stack_frame.h"
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namespace dart {
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static void IterateFrames(const GrowableObjectArray& code_list,
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const GrowableObjectArray& pc_offset_list,
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int skip_frames) {
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StackFrameIterator frames(StackFrameIterator::kDontValidateFrames);
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StackFrame* frame = frames.NextFrame();
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ASSERT(frame != NULL); // We expect to find a dart invocation frame.
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Code& code = Code::Handle();
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Smi& offset = Smi::Handle();
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while (frame != NULL) {
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if (frame->IsDartFrame()) {
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if (skip_frames > 0) {
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skip_frames--;
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} else {
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code = frame->LookupDartCode();
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offset = Smi::New(frame->pc() - code.EntryPoint());
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code_list.Add(code);
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pc_offset_list.Add(offset);
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}
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}
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frame = frames.NextFrame();
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}
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}
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// Creates a Stacktrace object from the current stack.
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//
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// Skips the first skip_frames Dart frames.
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const Stacktrace& GetCurrentStacktrace(int skip_frames) {
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const GrowableObjectArray& code_list =
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GrowableObjectArray::Handle(GrowableObjectArray::New());
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const GrowableObjectArray& pc_offset_list =
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GrowableObjectArray::Handle(GrowableObjectArray::New());
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IterateFrames(code_list, pc_offset_list, skip_frames);
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const Array& code_array = Array::Handle(Array::MakeArray(code_list));
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const Array& pc_offset_array =
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Array::Handle(Array::MakeArray(pc_offset_list));
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const Stacktrace& stacktrace = Stacktrace::Handle(
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Stacktrace::New(code_array, pc_offset_array));
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return stacktrace;
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}
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// An utility method for convenient printing of dart stack traces when
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// inside 'gdb'. Note: This function will only work when there is a
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// valid exit frame information. It will not work when a breakpoint is
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// set in dart code and control is got inside 'gdb' without going through
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// the runtime or native transition stub.
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void _printCurrentStacktrace() {
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const Stacktrace& stacktrace = GetCurrentStacktrace(0);
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OS::PrintErr("=== Current Trace:\n%s===\n", stacktrace.ToCString());
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}
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// Like _printCurrentStacktrace, but works in a NoSafepointScope.
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void _printCurrentStacktraceNoSafepoint() {
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StackFrameIterator frames(StackFrameIterator::kDontValidateFrames);
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StackFrame* frame = frames.NextFrame();
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while (frame != NULL) {
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OS::Print("%s\n", frame->ToCString());
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frame = frames.NextFrame();
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}
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}
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DEFINE_NATIVE_ENTRY(StackTrace_current, 0) {
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const Stacktrace& stacktrace = GetCurrentStacktrace(1);
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return stacktrace.raw();
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}
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} // namespace dart
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