Alexander Markov
ebb7e1061c
setjmp is extremely expensive on MacOS/iOS as it always saves signal mask. Introduce DART_SETJMP / DART_LONGJMP macros to use _setjmp instead of setjmp on MacOS/iOS. DeltaBlue on Mac/arm64 on the interpreter: 179585.3 us -> 58347.9 us. (3x faster) TEST=ci Issue: https://github.com/dart-lang/sdk/issues/60205 Change-Id: I2122f2eb4d5de66ae2ef904a7034af1ed09f1d07 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412320 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
// Copyright (c) 2011, 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/longjump.h"
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#include "include/dart_api.h"
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#include "vm/dart_api_impl.h"
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#include "vm/isolate.h"
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#include "vm/object.h"
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#include "vm/os.h"
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namespace dart {
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jmp_buf* LongJumpScope::Set() {
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ASSERT(top_ == nullptr);
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top_ = Thread::Current()->top_resource();
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return &environment_;
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}
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void LongJumpScope::Jump(int value, const Error& error) {
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ASSERT(!error.IsNull());
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// Remember the error in the sticky error of this isolate.
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Thread::Current()->set_sticky_error(error);
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Jump(value);
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}
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void LongJumpScope::Jump(int value) {
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// A zero is the default return value from setting up a LongJumpScope
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// using Set.
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ASSERT(value != 0);
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Thread* thread = Thread::Current();
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DEBUG_ASSERT(thread->TopErrorHandlerIsSetJump());
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// Destruct all the active StackResource objects.
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StackResource::UnwindAbove(thread, top_);
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DART_LONGJMP(environment_, value);
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UNREACHABLE();
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}
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} // namespace dart
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