484d0408f9
When providing allocation and deallocation traces, the ASan compiler-rt runtime already provides call addresses (`TracePCType::Calls`). On Darwin, system sanitizers (libsanitizers) provides return address. It also discards a few non-user frames at the top of the stack, because these internal libmalloc/libsanitizers stack frames do not provide any value when diagnosing memory errors. Introduce and add handling for `TracePCType::ReturnsNoZerothFrame` to cover this case and enable libsanitizers traces line-level testing. rdar://157596927 --- Commit 1 is a mechanical refactoring to introduce and adopt `TracePCType` enum to replace `pcs_are_call_addresses` bool. It preserve the current behavior: ``` pcs_are_call_addresses: false -> TracePCType::Returns (default) true -> TracePCType::Calls ``` Best reviewed commit by commit.
45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
//===-- HistoryUnwind.h -----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_HISTORYUNWIND_H
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#define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_HISTORYUNWIND_H
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#include <vector>
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#include "lldb/Target/Unwind.h"
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#include "lldb/lldb-private.h"
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namespace lldb_private {
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class HistoryUnwind : public lldb_private::Unwind {
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public:
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HistoryUnwind(Thread &thread, std::vector<lldb::addr_t> pcs,
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HistoryPCType pc_type = HistoryPCType::Returns);
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~HistoryUnwind() override;
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protected:
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void DoClear() override;
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lldb::RegisterContextSP
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DoCreateRegisterContextForFrame(StackFrame *frame) override;
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bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
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lldb::addr_t &pc,
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bool &behaves_like_zeroth_frame) override;
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uint32_t DoGetFrameCount() override;
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private:
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std::vector<lldb::addr_t> m_pcs;
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HistoryPCType m_pc_type;
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};
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} // namespace lldb_private
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#endif // LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_HISTORYUNWIND_H
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