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[vm] Provide a couple more gdb helpers to print stack traces.

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Change-Id: Ic2a3055ede694406596596d57ba54909a6985cde
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/116080
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This commit is contained in:
Régis Crelier 2019-09-06 19:25:31 +00:00 committed by commit-bot@chromium.org
parent d7c96f323d
commit 6f4ceb887e
1 changed files with 39 additions and 2 deletions
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41
runtime/vm/gdb_helpers.cc
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@ -3,6 +3,7 @@
// BSD-style license that can be found in the LICENSE file.
#include "lib/stacktrace.h"
#include "vm/heap/safepoint.h"
#include "vm/object.h"
#include "vm/stack_frame.h"
@ -39,12 +40,48 @@ void _printStackTrace() {
Thread::Current(),
StackFrameIterator::kNoCrossThreadIteration);
StackFrame* frame = frames.NextFrame();
while (frame != NULL) {
while (frame != nullptr) {
OS::PrintErr("%s\n", frame->ToCString());
frame = frames.NextFrame();
}
}
#if !defined(TARGET_ARCH_DBC)
// Like _printDartStackTrace, but works when stopped in generated code.
// Must be called with the current fp, sp, and pc.
DART_EXPORT
void _printGeneratedStackTrace(uword fp, uword sp, uword pc) {
StackFrameIterator frames(fp, sp, pc, ValidationPolicy::kDontValidateFrames,
Thread::Current(),
StackFrameIterator::kNoCrossThreadIteration);
StackFrame* frame = frames.NextFrame();
while (frame != nullptr) {
OS::PrintErr("%s\n", frame->ToCString());
frame = frames.NextFrame();
}
}
// Like _printDartStackTrace, but works in the interpreter loop.
// Must be called with the current interpreter fp, sp, and pc.
// Note that sp[0] is not modified, but sp[1] will be trashed.
DART_EXPORT
void _printInterpreterStackTrace(RawObject** fp,
RawObject** sp,
const KBCInstr* pc) {
Thread* thread = Thread::Current();
sp[1] = Function::null();
sp[2] = Bytecode::null();
sp[3] = reinterpret_cast<RawObject*>(reinterpret_cast<uword>(pc));
sp[4] = reinterpret_cast<RawObject*>(fp);
RawObject** exit_fp = sp + 1 + kKBCDartFrameFixedSize;
thread->set_top_exit_frame_info(reinterpret_cast<uword>(exit_fp));
thread->set_execution_state(Thread::kThreadInVM);
_printDartStackTrace();
thread->set_execution_state(Thread::kThreadInGenerated);
thread->set_top_exit_frame_info(0);
}
#endif // !defined(TARGET_ARCH_DBC)
class PrintObjectPointersVisitor : public ObjectPointerVisitor {
public:
PrintObjectPointersVisitor() : ObjectPointerVisitor(Isolate::Current()) {}
@ -64,7 +101,7 @@ void _printStackTraceWithLocals() {
Thread::Current(),
StackFrameIterator::kNoCrossThreadIteration);
StackFrame* frame = frames.NextFrame();
while (frame != NULL) {
while (frame != nullptr) {
OS::PrintErr("%s\n", frame->ToCString());
frame->VisitObjectPointers(&visitor);
frame = frames.NextFrame();