commit | b6dc4dad4dae73fe5f8500653de61a76fa5d6ce6 | [log] [tgz] |
---|---|---|
author | Alexander Markov <alexmarkov@google.com> | Wed Feb 17 20:12:32 2021 +0000 |
committer | commit-bot@chromium.org <commit-bot@chromium.org> | Wed Feb 17 20:12:32 2021 +0000 |
tree | c724dffa97f8ec260c1b0432d94ca19f3f008ae7 | |
parent | dfd52f60a1a53e2ef7eba4ade9f2ae1d251614cc [diff] |
[vm/aot] Avoid using most Code objects in stack traces with --dwarf-stack-traces The following changes are done in preparation for the removal of Code objects in AOT with --dwarf-stack-traces: * Stack trace objects are extended to hold uword PCs (which may not fit into Smi range). * Scanning stack frames in GC (StackFrame::VisitObjectPointers) now avoids using Code objects. In order to find CompressedStackMaps it now calls ReversePc::FindCompressedStackMaps. * Singleton Code object (StubCode::UnknownDartCode()) is prepared as a replacement for Code objects in stack traces. It has PayloadStart() == 0 and Size() == kUwordMax so it includes arbitrary PCs. * In --dwarf-stack-traces mode, most Code objects obtained from stack frames are replaced with StubCode::UnknownDartCode(). This simulates future behavior of ReversePc::Lookup when Code objects will be removed. Issue: https://github.com/dart-lang/sdk/issues/44852 Change-Id: I7cec7b8b9396c9cfeca3c256a412ba4e82a7e0c4 TEST=ci Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182720 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Tess Strickland <sstrickl@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
Dart is:
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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