From c30a6232df03e1efbd9f3b226777b07e087a1122 Mon Sep 17 00:00:00 2001 From: Allan Sandfeld Jensen Date: Mon, 12 Oct 2020 14:27:29 +0200 Subject: BASELINE: Update Chromium to 85.0.4183.140 Change-Id: Iaa42f4680837c57725b1344f108c0196741f6057 Reviewed-by: Allan Sandfeld Jensen --- chromium/v8/src/heap/base/stack.h | 43 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 chromium/v8/src/heap/base/stack.h (limited to 'chromium/v8/src/heap/base/stack.h') diff --git a/chromium/v8/src/heap/base/stack.h b/chromium/v8/src/heap/base/stack.h new file mode 100644 index 00000000000..a46e6e660ed --- /dev/null +++ b/chromium/v8/src/heap/base/stack.h @@ -0,0 +1,43 @@ +// Copyright 2020 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef V8_HEAP_BASE_STACK_H_ +#define V8_HEAP_BASE_STACK_H_ + +#include "src/base/macros.h" + +namespace heap { +namespace base { + +class StackVisitor { + public: + virtual void VisitPointer(const void* address) = 0; +}; + +// Abstraction over the stack. Supports handling of: +// - native stack; +// - ASAN/MSAN; +// - SafeStack: https://releases.llvm.org/10.0.0/tools/clang/docs/SafeStack.html +class V8_EXPORT_PRIVATE Stack final { + public: + explicit Stack(const void* stack_start); + + // Returns true if |slot| is part of the stack and false otherwise. + bool IsOnStack(void* slot) const; + + // Word-aligned iteration of the stack. Slot values are passed on to + // |visitor|. + void IteratePointers(StackVisitor* visitor) const; + + // Returns the start of the stack. + const void* stack_start() const { return stack_start_; } + + private: + const void* stack_start_; +}; + +} // namespace base +} // namespace heap + +#endif // V8_HEAP_BASE_STACK_H_ -- cgit v1.2.1