Linux: Check the CRC32 of the debug link file in the symbol dumper.

R=mark@chromium.org

Review URL: https://breakpad.appspot.com/1644002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1320 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 53 insertions, 0 deletions

diff --git a/src/common/linux/crc32.h b/src/common/linux/crc32.h
new file mode 100644
index 00000000..e3d9db92
--- /dev/null
+++ b/src/common/linux/crc32.h
@@ -0,0 +1,53 @@
+// Copyright 2014 Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef COMMON_LINUX_CRC32_H_
+#define COMMON_LINUX_CRC32_H_
+
+#include <stdint.h>
+
+#include <string>
+
+namespace google_breakpad {
+
+// Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the
+// checksum result from the previous update; for the first call, it should be 0.
+uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len);
+
+// Computes a CRC32 checksum using |len| bytes from |buf|.
+inline uint32_t ComputeCrc32(const void* buf, size_t len) {
+  return UpdateCrc32(0, buf, len);
+}
+inline uint32_t ComputeCrc32(const std::string& str) {
+  return ComputeCrc32(str.c_str(), str.size());
+}
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_LINUX_CRC32_H_