f9a88acbc9
TBR=mvstanton@chromium.org,neis@chromium.org,ahaas@chromium.org Bug: v8:9247 Change-Id: I5433c863a54f3412d73df0d38aba3fdbcfac7ebe Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1627973 Commit-Queue: Yang Guo <yangguo@chromium.org> Auto-Submit: Yang Guo <yangguo@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#61830}
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
// Copyright 2010 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_EXECUTION_VM_STATE_H_
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#define V8_EXECUTION_VM_STATE_H_
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#include "include/v8.h"
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#include "src/common/globals.h"
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namespace v8 {
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namespace internal {
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// Logging and profiling. A StateTag represents a possible state of
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// the VM. The logger maintains a stack of these. Creating a VMState
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// object enters a state by pushing on the stack, and destroying a
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// VMState object leaves a state by popping the current state from the
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// stack.
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template <StateTag Tag>
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class VMState {
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public:
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explicit inline VMState(Isolate* isolate);
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inline ~VMState();
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private:
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Isolate* isolate_;
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StateTag previous_tag_;
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};
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class ExternalCallbackScope {
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public:
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inline ExternalCallbackScope(Isolate* isolate, Address callback);
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inline ~ExternalCallbackScope();
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Address callback() { return callback_; }
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Address* callback_entrypoint_address() {
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if (callback_ == kNullAddress) return nullptr;
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#if USES_FUNCTION_DESCRIPTORS
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return FUNCTION_ENTRYPOINT_ADDRESS(callback_);
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#else
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return &callback_;
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#endif
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}
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ExternalCallbackScope* previous() { return previous_scope_; }
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inline Address scope_address();
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private:
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Isolate* isolate_;
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Address callback_;
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ExternalCallbackScope* previous_scope_;
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#ifdef USE_SIMULATOR
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Address scope_address_;
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#endif
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_EXECUTION_VM_STATE_H_
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