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author | waylonis <waylonis@4c0a9323-5329-0410-9bdc-e9ce6186880e> | 2006-11-16 21:52:18 +0000 |
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committer | waylonis <waylonis@4c0a9323-5329-0410-9bdc-e9ce6186880e> | 2006-11-16 21:52:18 +0000 |
commit | ff480d4b4b59ef2182e4fd9a6874da078e8466b5 (patch) | |
tree | 59ff27c72d07409c0a6445e31fe75832da4b1485 /src/client/minidump_file_writer.cc | |
parent | Airbag client libraries should compile under MSVC .NET 2003/7.1 (#64). (diff) | |
download | breakpad-ff480d4b4b59ef2182e4fd9a6874da078e8466b5.tar.xz |
Add minidump file writer. Tested on Mac, but should compile on POSIX systems.
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@65 4c0a9323-5329-0410-9bdc-e9ce6186880e
Diffstat (limited to 'src/client/minidump_file_writer.cc')
-rw-r--r-- | src/client/minidump_file_writer.cc | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/client/minidump_file_writer.cc b/src/client/minidump_file_writer.cc new file mode 100644 index 00000000..d5e381b9 --- /dev/null +++ b/src/client/minidump_file_writer.cc @@ -0,0 +1,233 @@ +// Copyright (c) 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. + +// minidump_file_writer.cc: Minidump file writer implementation. +// +// See minidump_file_writer.h for documentation. + +#include <fcntl.h> +#include <limits.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include "client/minidump_file_writer-inl.h" + +namespace google_airbag { + +MinidumpFileWriter::MinidumpFileWriter() : file_(-1), position_(0), size_(0) { +} + +MinidumpFileWriter::~MinidumpFileWriter() { + Close(); +} + +bool MinidumpFileWriter::Open(const std::string &path) { + assert(file_ == -1); + file_ = open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0666); + + return file_ != -1; +} + +bool MinidumpFileWriter::Close() { + bool result = true; + + if (file_ != -1) { + ftruncate(file_, position_); + result = close(file_) == 0; + file_ = -1; + } + + return result; +} + +bool MinidumpFileWriter::WriteString(const wchar_t *str, + unsigned int length, + MDLocationDescriptor *location) { + assert(str); + assert(location); + // Calculate the mdstring length by either limiting to |length| as passed in + // or by finding the location of the NULL character. + if (!length) + length = INT_MAX; + + unsigned int mdstring_length = 0; + for (; mdstring_length < length && str[mdstring_length]; ++mdstring_length) { + } + + // Allocate the string buffer + TypedMDRVA<MDString> mdstring(this); + + if (!mdstring.AllocateObjectAndArray(mdstring_length + 1, sizeof(u_int16_t))) + return false; + + // Set length excluding the NULL + mdstring.get()->length = mdstring_length * sizeof(u_int16_t); + + u_int16_t ch; + bool result = true; + + if (sizeof(wchar_t) == sizeof(u_int16_t)) { + // Shortcut if wchar_t is the same size as MDString's buffer + result = mdstring.Copy(str, mdstring.get()->length); + } else { + // Copy the string character by character + for (unsigned int c = 0; c < mdstring_length && result == true; c++) { + ch = str[c]; + // TODO: For the UTF-32->UTF-16 conversion, it's possible that there + // are characters that will require more than one UTF-16 character to + // represent it. Fully supporting this will require a more sophisticated + // calculation of the size of the resulting string and for converting the + // UTF-32 character into the two UTF-16 characters. + result = mdstring.CopyIndexAfterObject(c, &ch, sizeof(ch)); + } + } + + // NULL terminate + if (result) { + ch = 0; + result = mdstring.CopyIndexAfterObject(mdstring_length, &ch, sizeof(ch)); + + if (result) + *location = mdstring.location(); + } + + return result; +} + +bool MinidumpFileWriter::WriteString(const char *str, unsigned int length, + MDLocationDescriptor *location) { + assert(str); + assert(location); + // Calculate the mdstring length by either limiting to |length| as passed in + // or by finding the location of the NULL character. + if (!length) + length = INT_MAX; + + unsigned int mdstring_length = 0; + for (; mdstring_length < length && str[mdstring_length]; ++mdstring_length) { + } + + // Allocate the string buffer + TypedMDRVA<MDString> mdstring(this); + + if (!mdstring.AllocateObjectAndArray(mdstring_length + 1, sizeof(u_int16_t))) + return false; + + // Set length excluding the NULL + mdstring.get()->length = mdstring_length * sizeof(u_int16_t); + + u_int16_t ch; + bool result = true; + + // Copy the string character by character + for (unsigned int c = 0; c < mdstring_length && result == true; c++) { + ch = str[c]; + // TODO: For the UTF-8->UTF-16 conversion, it's possible that there are + // characters that will convert one or more UTF-8 character into a single + // UTF-16 character. Fully supporting this will require a more + // sophisticated calculation of the size of the resulting string and for + // converting the UTF-8 characters into a UTF-16 character. + result = mdstring.CopyIndexAfterObject(c, &ch, sizeof(ch)); + } + + // NULL terminate + if (result) { + ch = 0; + result = mdstring.CopyIndexAfterObject(mdstring_length, &ch, sizeof(ch)); + + if (result) + *location = mdstring.location(); + } + + return result; +} + +bool MinidumpFileWriter::WriteMemory(const void *src, size_t size, + MDMemoryDescriptor *output) { + assert(src); + assert(output); + UntypedMDRVA mem(this); + + if (!mem.Allocate(size)) + return false; + + if (!mem.Copy(src, mem.size())) + return false; + + output->start_of_memory_range = reinterpret_cast<u_int64_t>(src); + output->memory = mem.location(); + + return true; +} + +MDRVA MinidumpFileWriter::Allocate(size_t size) { + assert(size); + assert(file_ != -1); + + size_t aligned_size = (size + 7) & ~7; // 64-bit alignment + + if (position_ + aligned_size > size_) { + size_t growth = aligned_size; + size_t minimal_growth = getpagesize(); + + // Ensure that the file grows by at least the size of a memory page + if (growth < minimal_growth) + growth = minimal_growth; + + size_t new_size = size_ + growth; + + if (ftruncate(file_, new_size) != 0) + return kInvalidMDRVA; + + size_ = new_size; + } + + MDRVA current_position = position_; + position_ += static_cast<MDRVA>(aligned_size); + + return current_position; +} + +bool MinidumpFileWriter::Copy(MDRVA position, const void* src, ssize_t size) { + assert(file_ != -1); + + // Ensure that the data will fit in the allocated space + if (size + position > size_) + return false; + + // Seek and write the data + if (lseek(file_, position, SEEK_SET) == static_cast<off_t>(position)) + if (write(file_, src, size) == size) + return true; + + return false; +} + +} // namespace google_airbag |