mirror of
https://github.com/clementine-player/Clementine
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274 lines
8.1 KiB
C++
274 lines
8.1 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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// minidump_file_writer.cc: Minidump file writer implementation.
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//
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// See minidump_file_writer.h for documentation.
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "client/minidump_file_writer-inl.h"
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#include "common/linux/linux_libc_support.h"
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#include "common/string_conversion.h"
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#if __linux__
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#include "third_party/lss/linux_syscall_support.h"
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#endif
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namespace google_breakpad {
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const MDRVA MinidumpFileWriter::kInvalidMDRVA = static_cast<MDRVA>(-1);
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MinidumpFileWriter::MinidumpFileWriter() : file_(-1), position_(0), size_(0) {
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}
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MinidumpFileWriter::~MinidumpFileWriter() {
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Close();
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}
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bool MinidumpFileWriter::Open(const char *path) {
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assert(file_ == -1);
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#if __linux__
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file_ = sys_open(path, O_WRONLY | O_CREAT | O_EXCL, 0600);
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#else
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file_ = open(path, O_WRONLY | O_CREAT | O_EXCL, 0600);
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#endif
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return file_ != -1;
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}
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bool MinidumpFileWriter::Close() {
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bool result = true;
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if (file_ != -1) {
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if (-1 == ftruncate(file_, position_)) {
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return false;
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}
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#if __linux__
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result = (sys_close(file_) == 0);
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#else
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result = (close(file_) == 0);
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#endif
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file_ = -1;
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}
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return result;
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}
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bool MinidumpFileWriter::CopyStringToMDString(const wchar_t *str,
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unsigned int length,
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TypedMDRVA<MDString> *mdstring) {
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bool result = true;
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if (sizeof(wchar_t) == sizeof(u_int16_t)) {
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// Shortcut if wchar_t is the same size as MDString's buffer
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result = mdstring->Copy(str, mdstring->get()->length);
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} else {
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u_int16_t out[2];
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int out_idx = 0;
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// Copy the string character by character
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while (length && result) {
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UTF32ToUTF16Char(*str, out);
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if (!out[0])
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return false;
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// Process one character at a time
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--length;
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++str;
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// Append the one or two UTF-16 characters. The first one will be non-
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// zero, but the second one may be zero, depending on the conversion from
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// UTF-32.
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int out_count = out[1] ? 2 : 1;
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size_t out_size = sizeof(u_int16_t) * out_count;
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result = mdstring->CopyIndexAfterObject(out_idx, out, out_size);
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out_idx += out_count;
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}
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}
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return result;
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}
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bool MinidumpFileWriter::CopyStringToMDString(const char *str,
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unsigned int length,
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TypedMDRVA<MDString> *mdstring) {
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bool result = true;
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u_int16_t out[2];
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int out_idx = 0;
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// Copy the string character by character
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while (length && result) {
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int conversion_count = UTF8ToUTF16Char(str, length, out);
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if (!conversion_count)
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return false;
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// Move the pointer along based on the nubmer of converted characters
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length -= conversion_count;
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str += conversion_count;
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// Append the one or two UTF-16 characters
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int out_count = out[1] ? 2 : 1;
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size_t out_size = sizeof(u_int16_t) * out_count;
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result = mdstring->CopyIndexAfterObject(out_idx, out, out_size);
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out_idx += out_count;
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}
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return result;
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}
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template <typename CharType>
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bool MinidumpFileWriter::WriteStringCore(const CharType *str,
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unsigned int length,
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MDLocationDescriptor *location) {
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assert(str);
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assert(location);
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// Calculate the mdstring length by either limiting to |length| as passed in
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// or by finding the location of the NULL character.
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unsigned int mdstring_length = 0;
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if (!length)
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length = INT_MAX;
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for (; mdstring_length < length && str[mdstring_length]; ++mdstring_length)
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;
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// Allocate the string buffer
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TypedMDRVA<MDString> mdstring(this);
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if (!mdstring.AllocateObjectAndArray(mdstring_length + 1, sizeof(u_int16_t)))
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return false;
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// Set length excluding the NULL and copy the string
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mdstring.get()->length =
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static_cast<u_int32_t>(mdstring_length * sizeof(u_int16_t));
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bool result = CopyStringToMDString(str, mdstring_length, &mdstring);
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// NULL terminate
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if (result) {
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u_int16_t ch = 0;
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result = mdstring.CopyIndexAfterObject(mdstring_length, &ch, sizeof(ch));
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if (result)
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*location = mdstring.location();
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}
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return result;
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}
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bool MinidumpFileWriter::WriteString(const wchar_t *str, unsigned int length,
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MDLocationDescriptor *location) {
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return WriteStringCore(str, length, location);
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}
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bool MinidumpFileWriter::WriteString(const char *str, unsigned int length,
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MDLocationDescriptor *location) {
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return WriteStringCore(str, length, location);
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}
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bool MinidumpFileWriter::WriteMemory(const void *src, size_t size,
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MDMemoryDescriptor *output) {
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assert(src);
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assert(output);
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UntypedMDRVA mem(this);
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if (!mem.Allocate(size))
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return false;
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if (!mem.Copy(src, mem.size()))
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return false;
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output->start_of_memory_range = reinterpret_cast<u_int64_t>(src);
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output->memory = mem.location();
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return true;
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}
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MDRVA MinidumpFileWriter::Allocate(size_t size) {
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assert(size);
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assert(file_ != -1);
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size_t aligned_size = (size + 7) & ~7; // 64-bit alignment
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if (position_ + aligned_size > size_) {
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size_t growth = aligned_size;
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size_t minimal_growth = getpagesize();
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// Ensure that the file grows by at least the size of a memory page
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if (growth < minimal_growth)
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growth = minimal_growth;
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size_t new_size = size_ + growth;
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if (ftruncate(file_, new_size) != 0)
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return kInvalidMDRVA;
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size_ = new_size;
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}
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MDRVA current_position = position_;
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position_ += static_cast<MDRVA>(aligned_size);
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return current_position;
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}
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bool MinidumpFileWriter::Copy(MDRVA position, const void *src, ssize_t size) {
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assert(src);
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assert(size);
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assert(file_ != -1);
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// Ensure that the data will fit in the allocated space
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if (static_cast<size_t>(size + position) > size_)
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return false;
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// Seek and write the data
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#if __linux__
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if (sys_lseek(file_, position, SEEK_SET) == static_cast<off_t>(position)) {
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if (sys_write(file_, src, size) == size) {
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#else
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if (lseek(file_, position, SEEK_SET) == static_cast<off_t>(position)) {
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if (write(file_, src, size) == size) {
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#endif
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return true;
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}
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}
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return false;
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}
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bool UntypedMDRVA::Allocate(size_t size) {
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assert(size_ == 0);
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size_ = size;
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position_ = writer_->Allocate(size_);
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return position_ != MinidumpFileWriter::kInvalidMDRVA;
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}
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bool UntypedMDRVA::Copy(MDRVA pos, const void *src, size_t size) {
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assert(src);
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assert(size);
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assert(pos + size <= position_ + size_);
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return writer_->Copy(pos, src, size);
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}
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} // namespace google_breakpad
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