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fd4f80ce54
PR-URL: https://github.com/nodejs/node/pull/42657 Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com>
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
// Copyright 2019 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_TOOLS_DEBUG_HELPER_HEAP_CONSTANTS_H_
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#define V8_TOOLS_DEBUG_HELPER_HEAP_CONSTANTS_H_
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#include <cstdint>
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#include <string>
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#include <vector>
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#include "debug-helper.h"
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#include "src/objects/instance-type.h"
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namespace d = v8::debug_helper;
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namespace v8 {
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namespace internal {
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namespace debug_helper_internal {
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// ===== Functions generated by gen-heap-constants.py: =========================
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// Returns the name of a known object, given its offset within the first page of
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// the space, or empty string on failure.
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std::string FindKnownObjectInOldSpace(uintptr_t offset);
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std::string FindKnownObjectInReadOnlySpace(uintptr_t offset);
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std::string FindKnownObjectInMapSpace(uintptr_t offset);
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// In builds with pointer compression enabled, sets the *_first_page members in
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// the HeapAddresses object. In other builds, does nothing.
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void FillInUnknownHeapAddresses(d::HeapAddresses* heap_addresses,
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uintptr_t any_uncompressed_ptr);
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// Returns the instance type for the known Map, given its offset within the
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// first page of the space, or empty string on failure.
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int FindKnownMapInstanceTypeInMapSpace(uintptr_t offset);
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int FindKnownMapInstanceTypeInOldSpace(uintptr_t offset);
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int FindKnownMapInstanceTypeInReadOnlySpace(uintptr_t offset);
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// ===== End of generated functions. ===========================================
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// Returns a descriptive string if the given address matches a known object, or
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// an empty string otherwise.
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std::string FindKnownObject(uintptr_t address,
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const d::HeapAddresses& heap_addresses);
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struct KnownInstanceType {
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enum class Confidence {
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kLow,
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kHigh,
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};
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KnownInstanceType() : confidence(Confidence::kLow) {}
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KnownInstanceType(int type) : KnownInstanceType() {
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if (type >= 0) {
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confidence = Confidence::kHigh;
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types.push_back(static_cast<v8::internal::InstanceType>(type));
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}
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}
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Confidence confidence;
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std::vector<v8::internal::InstanceType> types;
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};
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// Returns information about the instance type of the Map at the given address,
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// based on the list of known Maps.
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KnownInstanceType FindKnownMapInstanceTypes(
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uintptr_t address, const d::HeapAddresses& heap_addresses);
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} // namespace debug_helper_internal
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} // namespace internal
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} // namespace v8
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#endif
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