Added DWARF support to Breakpad client. Thanks to Google for open sourcing their DWARF code!

Modified dump_syms to detect dSYM bundles or a binary with DWARF data appropriately, and convert data from DWARF reader to dump_syms native structures

R=danny.berlin (original writer of DWARF code)



git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@286 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 141 insertions, 0 deletions

diff --git a/src/common/mac/dwarf/bytereader-inl.h b/src/common/mac/dwarf/bytereader-inl.h
new file mode 100644
index 00000000..7ccd0fe6
--- /dev/null
+++ b/src/common/mac/dwarf/bytereader-inl.h
@@ -0,0 +1,141 @@
+// Copyright 2006 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 UTIL_DEBUGINFO_BYTEREADER_INL_H__
+#define UTIL_DEBUGINFO_BYTEREADER_INL_H__
+
+#include "common/mac/dwarf/bytereader.h"
+
+namespace dwarf2reader {
+
+inline uint8 ByteReader::ReadOneByte(const char* buffer) const {
+  return buffer[0];
+}
+
+inline uint16 ByteReader::ReadTwoBytes(const char* buffer) const {
+  const uint16 buffer0 = static_cast<uint16>(buffer[0]);
+  const uint16 buffer1 = static_cast<uint16>(buffer[1]);
+  if (endian_ == ENDIANNESS_LITTLE) {
+    return buffer0 | buffer1 << 8;
+  } else {
+    return buffer1 | buffer0 << 8;
+  }
+}
+
+inline uint64 ByteReader::ReadFourBytes(const char* buffer) const {
+  const uint32 buffer0 = static_cast<uint32>(buffer[0]);
+  const uint32 buffer1 = static_cast<uint32>(buffer[1]);
+  const uint32 buffer2 = static_cast<uint32>(buffer[2]);
+  const uint32 buffer3 = static_cast<uint32>(buffer[3]);
+  if (endian_ == ENDIANNESS_LITTLE) {
+    return buffer0 | buffer1 << 8 | buffer2 << 16 | buffer3 << 24;
+  } else {
+    return buffer3 | buffer2 << 8 | buffer1 << 16 | buffer0 << 24;
+  }
+}
+
+inline uint64 ByteReader::ReadEightBytes(const char* buffer) const {
+  const uint64 buffer0 = static_cast<uint64>(buffer[0]);
+  const uint64 buffer1 = static_cast<uint64>(buffer[1]);
+  const uint64 buffer2 = static_cast<uint64>(buffer[2]);
+  const uint64 buffer3 = static_cast<uint64>(buffer[3]);
+  const uint64 buffer4 = static_cast<uint64>(buffer[4]);
+  const uint64 buffer5 = static_cast<uint64>(buffer[5]);
+  const uint64 buffer6 = static_cast<uint64>(buffer[6]);
+  const uint64 buffer7 = static_cast<uint64>(buffer[7]);
+  if (endian_ == ENDIANNESS_LITTLE) {
+    return buffer0 | buffer1 << 8 | buffer2 << 16 | buffer3 << 24 |
+      buffer4 << 32 | buffer5 << 40 | buffer6 << 48 | buffer7 << 56;
+  } else {
+    return buffer7 | buffer6 << 8 | buffer5 << 16 | buffer4 << 24 |
+      buffer3 << 32 | buffer2 << 40 | buffer1 << 48 | buffer0 << 56;
+  }
+}
+
+// Read an unsigned LEB128 number.  Each byte contains 7 bits of
+// information, plus one bit saying whether the number continues or
+// not.
+
+inline uint64 ByteReader::ReadUnsignedLEB128(const char* buffer,
+                                             size_t* len) const {
+  uint64 result = 0;
+  size_t num_read = 0;
+  unsigned int shift = 0;
+  unsigned char byte;
+
+  do {
+    byte = *buffer++;
+    num_read++;
+
+    result |= (static_cast<uint64>(byte & 0x7f)) << shift;
+
+    shift += 7;
+
+  } while (byte & 0x80);
+
+  *len = num_read;
+
+  return result;
+}
+
+// Read a signed LEB128 number.  These are like regular LEB128
+// numbers, except the last byte may have a sign bit set.
+
+inline int64 ByteReader::ReadSignedLEB128(const char* buffer,
+                                          size_t* len) const {
+  int64 result = 0;
+  unsigned int shift = 0;
+  size_t num_read = 0;
+  unsigned char byte;
+
+  do {
+      byte = *buffer++;
+      num_read++;
+      result |= (static_cast<uint64>(byte & 0x7f) << shift);
+      shift += 7;
+  } while (byte & 0x80);
+
+  if ((shift < 8 * sizeof (result)) && (byte & 0x40))
+    result |= -((static_cast<int64>(1)) << shift);
+  *len = num_read;
+  return result;
+}
+
+inline uint64 ByteReader::ReadOffset(const char* buffer) const {
+  assert(this->offset_reader_);
+  return (this->*offset_reader_)(buffer);
+}
+
+inline uint64 ByteReader::ReadAddress(const char* buffer) const {
+  assert(this->address_reader_);
+  return (this->*address_reader_)(buffer);
+}
+
+}  // namespace dwarf2reader
+
+#endif  // UTIL_DEBUGINFO_BYTEREADER_INL_H__