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2997f45907
when checking exploitability rating. Linux minidumps do not support MD_MEMORY_INFO_LIST_STREAM, meaning the processor cannot retrieve its memory mappings. However, it has its own stream, MD_LINUX_MAPS, which contains memory mappings specific to Linux (it contains the contents of /proc/self/maps). This CL allows the minidump to gather information from the memory mappings for Linux minidumps. In addition, exploitability rating for Linux dumps now use memory mappings instead of checking the ELF headers of binaries. The basis for the change is that checking the ELF headers requires the minidumps to store the memory from the ELF headers, while the memory mapping data is already present, meaning the size of a minidump will be unchanged. As a result, of removing ELF header analysis, two unit tests have been removed. Arguably, the cases that those unit tests check do not merit a high exploitability rating and do not warrant a solid conclusion that was given earlier. R=ivanpe@chromium.org Review URL: https://codereview.chromium.org/1251593007 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1476 4c0a9323-5329-0410-9bdc-e9ce6186880e
66 lines
2.7 KiB
C++
66 lines
2.7 KiB
C++
// Copyright (c) 2013 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// exploitability_linux.h: Linux specific exploitability engine.
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//
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// Provides a guess at the exploitability of the crash for the Linux
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// platform given a minidump and process_state.
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//
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// Author: Matthew Riley
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#ifndef GOOGLE_BREAKPAD_PROCESSOR_EXPLOITABILITY_LINUX_H_
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#define GOOGLE_BREAKPAD_PROCESSOR_EXPLOITABILITY_LINUX_H_
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#include "common/scoped_ptr.h"
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#include "google_breakpad/common/breakpad_types.h"
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#include "google_breakpad/processor/exploitability.h"
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namespace google_breakpad {
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class ExploitabilityLinux : public Exploitability {
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public:
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ExploitabilityLinux(Minidump *dump,
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ProcessState *process_state);
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virtual ExploitabilityRating CheckPlatformExploitability();
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private:
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// This method takes the address of the instruction pointer and returns
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// whether the instruction pointer lies in a valid instruction region.
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bool InstructionPointerInCode(uint64_t instruction_ptr);
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// This method checks the exception that triggered the creation of the
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// minidump and reports whether the exception suggests no exploitability.
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bool BenignCrashTrigger(const MDRawExceptionStream *raw_exception_stream);
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};
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} // namespace google_breakpad
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#endif // GOOGLE_BREAKPAD_PROCESSOR_EXPLOITABILITY_LINUX_H_
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