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This CL improves the stack traces that accompany exceptions. Whenever an async function is entered, we remember how we got there. This is similar in spirit to package:stack_trace but the implementation is more efficient and memory usage can be more easily reasoned about. Tracking causal stack traces: - [x] Upon entry to an async function, capture the synchronous stack trace prefix and store it into the closure. - [x] Upon entry to an async* function, capture the synchronous stack trace prefix and store it into the closure. - [x] Before returning from an async function, clear the Thread's asynchronous stack trace. - [x] After resuming an async function, load the sychronous stack trace prefix into the Thread. - [x] Filter stack traces to remove async machinery. Service protocol changes: - [x] Send causal async stack trace. Observatory changes: - [x] Display causal async stack trace below async functions. Fixes https://github.com/dart-lang/sdk/issues/27661 R=asiva@google.com, rmacnak@google.com Comparisons: https://docs.google.com/a/google.com/document/d/10r6jEqr8OCiDZ4y9SYU_uOimcHiOGAZMly2ghTErALI/edit?usp=sharing Review-Url: https://codereview.chromium.org/2646443005 .
26 lines
763 B
C++
26 lines
763 B
C++
// Copyright (c) 2016, 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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#ifndef RUNTIME_LIB_STACKTRACE_H_
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#define RUNTIME_LIB_STACKTRACE_H_
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namespace dart {
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class StackTrace;
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class RawStackTrace;
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// Creates a StackTrace object from the current stack. Skips the
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// first skip_frames Dart frames.
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//
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// This function is exposed to provide stack trace printing in
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// assertion failures, etc.
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const StackTrace& GetCurrentStackTrace(int skip_frames);
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// Creates a StackTrace object to be attached to an exception.
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RawStackTrace* GetStackTraceForException();
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} // namespace dart
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#endif // RUNTIME_LIB_STACKTRACE_H_
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