mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
af4da780be
The new implementation is based on suspend/resume stubs and doesn't use desugaring of async functions on kernel AST. Previously, new implementation of async/async* was only supported in AOT mode. This change adds all necessary bits for the JIT mode: * Suspending variable-length frames (for unoptimized code). * Handling of Code and pool pointers in Dart stack frames. * OSR. * Deoptimization. * Hot reload. * Debugger. The new implementation is not enabled in JIT mode yet. Design doc: go/compact-async-await. TEST=ci Issue: https://github.com/dart-lang/sdk/issues/48378 Change-Id: I477d6684bdce7cbc1edb179ae2271ff598b7dcc5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/246081 Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Slava Egorov <vegorov@google.com>
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
// Copyright (c) 2021, 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_VM_PENDING_DEOPTS_H_
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#define RUNTIME_VM_PENDING_DEOPTS_H_
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#if defined(SHOULD_NOT_INCLUDE_RUNTIME)
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#error "Should not include runtime"
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#endif
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#include "vm/growable_array.h"
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namespace dart {
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class PendingLazyDeopt {
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public:
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PendingLazyDeopt(uword fp, uword pc) : fp_(fp), pc_(pc) {}
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uword fp() { return fp_; }
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uword pc() { return pc_; }
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void set_pc(uword pc) { pc_ = pc; }
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private:
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uword fp_;
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uword pc_;
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};
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class PendingDeopts {
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public:
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enum ClearReason {
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kClearDueToThrow,
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kClearDueToDeopt,
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};
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PendingDeopts();
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~PendingDeopts();
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bool HasPendingDeopts() { return pending_deopts_->length() > 0; }
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void AddPendingDeopt(uword fp, uword pc);
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uword FindPendingDeopt(uword fp);
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void ClearPendingDeoptsBelow(uword fp, ClearReason reason);
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void ClearPendingDeoptsAtOrBelow(uword fp, ClearReason reason);
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uword RemapExceptionPCForDeopt(uword program_counter,
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uword frame_pointer,
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bool* clear_deopt);
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private:
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MallocGrowableArray<PendingLazyDeopt>* pending_deopts_;
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};
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} // namespace dart
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#endif // RUNTIME_VM_PENDING_DEOPTS_H_
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