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.
30 lines
1.2 KiB
C++
30 lines
1.2 KiB
C++
//===-- Utility.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_INSTRUMENTATIONRUNTIME_UTILITY_UTILITY_H
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#define LLDB_SOURCE_PLUGINS_INSTRUMENTATIONRUNTIME_UTILITY_UTILITY_H
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#include <tuple>
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#include "lldb/lldb-forward.h"
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#include "lldb/lldb-private-enumerations.h"
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namespace lldb_private {
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/// On Darwin, if LLDB loaded libclang_rt, it's coming from a locally built
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/// compiler-rt, and we should prefer it in favour of the system sanitizers
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/// when running InstrumentationRuntime utility expressions that use symbols
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/// from the sanitizer libraries. This helper searches the target for such a
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/// dylib. Returns nullptr if no such dylib was found.
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std::tuple<lldb::ModuleSP, HistoryPCType>
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GetPreferredAsanModule(const Target &target);
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} // namespace lldb_private
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#endif // LLDB_SOURCE_PLUGINS_INSTRUMENTATIONRUNTIME_UTILITY_UTILITY_H
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