d4c884330c
When creating an UnwindMapLocal fails in the Build() function call, the destructor for UnwindMap is called. Unfortunately, the map_cursor_ member variable has not been initialized, so the call to destroy it winds up operating on garbage data. Part of this is a result of a bad class hierarchy, so this refactors the classes slightly, and properly initializes the map_cursor_ member variable in the base class. Bug: 26931578 Change-Id: I885596bf65e4ef63559cee2c56cd41576d5ecc1b
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LIBBACKTRACE_UNWIND_MAP_H
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#define _LIBBACKTRACE_UNWIND_MAP_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <backtrace/BacktraceMap.h>
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// The unw_map_cursor_t structure is different depending on whether it is
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// the local or remote version. In order to get the correct version, include
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// libunwind.h first then this header.
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class UnwindMap : public BacktraceMap {
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public:
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UnwindMap(pid_t pid);
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unw_map_cursor_t* GetMapCursor() { return &map_cursor_; }
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protected:
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unw_map_cursor_t map_cursor_;
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};
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class UnwindMapRemote : public UnwindMap {
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public:
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UnwindMapRemote(pid_t pid);
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virtual ~UnwindMapRemote();
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bool Build() override;
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private:
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bool GenerateMap();
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};
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class UnwindMapLocal : public UnwindMap {
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public:
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UnwindMapLocal();
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virtual ~UnwindMapLocal();
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bool Build() override;
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void FillIn(uintptr_t addr, backtrace_map_t* map) override;
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private:
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bool GenerateMap();
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bool map_created_;
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};
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#endif // _LIBBACKTRACE_UNWIND_MAP_H
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