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92 lines
3.6 KiB
C++
92 lines
3.6 KiB
C++
// Copyright (c) 2006, 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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//
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// pecoff_file_id.cc: Return a unique identifier for a file
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//
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#include "common/pecoff/pecoff_file_id.h"
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#include <string.h>
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#include "common/pecoff/pecoffutils.h"
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namespace google_breakpad {
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// Attempt to locate a CodeView build-id section in a PECOFF binary
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// and copy as many bytes of it as will fit into |identifier|.
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static bool FindPeCoffBuildID(const uint8_t* mapped_base,
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uint8_t identifier[kMDGUIDSize],
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uint32_t *age) {
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int peclass = PeCoffClass(mapped_base);
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if (peclass == PE32)
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return PeCoffClass32::GetBuildID(mapped_base, identifier, age);
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if (peclass == PE32PLUS)
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return PeCoffClass64::GetBuildID(mapped_base, identifier, age);
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return false;
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}
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// Attempt to locate the .text section of a binary and generate
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// a simple hash by XORing the first page worth of bytes into |identifier|.
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static bool HashPeCoffTextSection(const uint8_t* mapped_base,
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uint8_t identifier[kMDGUIDSize]) {
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int peclass = PeCoffClass(mapped_base);
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if (peclass == PE32)
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return PeCoffClass32::HashTextSection(mapped_base, identifier);
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if (peclass == PE32PLUS)
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return PeCoffClass64::HashTextSection(mapped_base, identifier);
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return false;
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}
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bool PeCoffFileID::PeCoffFileIdentifierFromMappedFile(const void* base,
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uint8_t identifier[kMDGUIDSize],
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uint32_t *age) {
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*age = 0;
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// Look for a build id first.
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if (FindPeCoffBuildID(reinterpret_cast<const uint8_t *>(base), identifier,
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age))
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return true;
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#if 1
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// XXX: Fallback to a default debug_identifier.
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memset(identifier, 0, kMDGUIDSize);
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*age = 0;
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return true;
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#else
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// Fall back on hashing the first page of the text section.
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// (This is of questionable value as the Windows Minidump writer doesn't have
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// this feature)
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return HashPeCoffTextSection(reinterpret_cast<const uint8_t *>(base),
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identifier);
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#endif
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}
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} // namespace google_breakpad
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