diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/client/minidump_file_writer-inl.h | 91 | ||||
| -rw-r--r-- | src/client/minidump_file_writer.cc | 233 | ||||
| -rw-r--r-- | src/client/minidump_file_writer.h | 226 |
3 files changed, 550 insertions, 0 deletions
diff --git a/src/client/minidump_file_writer-inl.h b/src/client/minidump_file_writer-inl.h new file mode 100644 index 00000000..232dfe31 --- /dev/null +++ b/src/client/minidump_file_writer-inl.h @@ -0,0 +1,91 @@ +// 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-inl.h: Minidump file writer implementation. +// +// See minidump_file_writer.h for documentation. + +#ifndef CLIENT_MINIDUMP_FILE_WRITER_INL_H__ +#define CLIENT_MINIDUMP_FILE_WRITER_INL_H__ + +#include <assert.h> + +#include "client/minidump_file_writer.h" + +namespace google_airbag { + +template<typename MDType> +inline bool TypedMDRVA<MDType>::Allocate() { + allocation_state_ = SINGLE_OBJECT; + return UntypedMDRVA::Allocate(sizeof(MDType)); +} + +template<typename MDType> +inline bool TypedMDRVA<MDType>::Allocate(size_t additional) { + allocation_state_ = SINGLE_OBJECT; + return UntypedMDRVA::Allocate(sizeof(MDType) + additional); +} + +template<typename MDType> +inline bool TypedMDRVA<MDType>::AllocateArray(size_t count) { + assert(count); + allocation_state_ = ARRAY; + return UntypedMDRVA::Allocate(sizeof(MDType) * count); +} + +template<typename MDType> +inline bool TypedMDRVA<MDType>::AllocateObjectAndArray(unsigned int count, + size_t size) { + assert(count && size); + allocation_state_ = SINGLE_OBJECT_WITH_ARRAY; + return UntypedMDRVA::Allocate(sizeof(MDType) + count * size); +} + +template<typename MDType> +inline bool TypedMDRVA<MDType>::CopyIndex(unsigned int index, MDType *item) { + assert(allocation_state_ == ARRAY); + return writer_->Copy(position_ + index * sizeof(MDType), item, + sizeof(MDType)); +} + +template<typename MDType> +inline bool TypedMDRVA<MDType>::CopyIndexAfterObject(unsigned int index, + void *src, size_t size) { + assert(allocation_state_ == SINGLE_OBJECT_WITH_ARRAY); + return writer_->Copy(position_ + sizeof(MDType) + index * size, src, size); +} + +template<typename MDType> +inline bool TypedMDRVA<MDType>::Flush() { + return writer_->Copy(position_, &data_, sizeof(MDType)); +} + +} // namespace google_airbag + +#endif // CLIENT_MINIDUMP_FILE_WRITER_INL_H__ 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 diff --git a/src/client/minidump_file_writer.h b/src/client/minidump_file_writer.h new file mode 100644 index 00000000..24249a18 --- /dev/null +++ b/src/client/minidump_file_writer.h @@ -0,0 +1,226 @@ +// 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.h: Implements file-based minidump generation + +#ifndef CLIENT_MINIDUMP_FILE_WRITER_H__ +#define CLIENT_MINIDUMP_FILE_WRITER_H__ + +#include <string> + +#include "google_airbag/common/minidump_format.h" + +namespace google_airbag { + +class MinidumpFileWriter { + public: + // Invalid MDRVA (Minidump Relative Virtual Address) + // returned on failed allocation + static const MDRVA kInvalidMDRVA = static_cast<MDRVA>(-1); + + MinidumpFileWriter(); + ~MinidumpFileWriter(); + + // Open |path| as the destination of the minidump data. Any existing file + // will be overwritten. + // Return true on success, or false on failure + bool Open(const std::string &path); + + // Close the current file + // Return true on success, or false on failure + bool Close(); + + // Write |str| to a MDString. + // |str| is expected to be either UTF-16 or UTF-32 depending on the size + // of wchar_t. + // Maximum |length| of characters to copy from |str|, or specify 0 to use the + // entire NULL terminated string. Copying will stop at the first NULL. + // |location| the allocated location + // Return true on success, or false on failure + bool WriteString(const wchar_t *str, unsigned int length, + MDLocationDescriptor *location); + + // Similar to above with |str| as an UTF-8 encoded string + bool WriteString(const char *str, unsigned int length, + MDLocationDescriptor *location); + + // Write |size| bytes starting at |src| into the current position. + // Return true on success and set |output| to position, or false on failure + bool WriteMemory(const void *src, size_t size, MDMemoryDescriptor *output); + + // Copies |size| bytes from |src| to |position| + // Return true on success, or false on failure + bool Copy(MDRVA position, const void *src, ssize_t size); + + // Return the current position for writing to the minidump + MDRVA position() const { return position_; } + + private: + friend class UntypedMDRVA; + + // Allocates an area of |size| bytes. + // Returns the position of the allocation, or kInvalidMDRVA if it was + // unable to allocate the bytes. + MDRVA Allocate(size_t size); + + // The file descriptor for the output file + int file_; + + // Current position in buffer + MDRVA position_; + + // Current allocated size + size_t size_; +}; + +// Represents an untyped allocated chunk +class UntypedMDRVA { + public: + explicit UntypedMDRVA(MinidumpFileWriter *writer) + : writer_(writer), + position_(writer->position()), + size_(0) {} + + // Allocates |size| bytes. Must not call more than once. + // Return true on success, or false on failure + bool Allocate(size_t size) { + assert(size_ == 0); + size_ = size; + position_ = writer_->Allocate(size_); + return position_ != MinidumpFileWriter::kInvalidMDRVA; + } + + // Returns the current position or kInvalidMDRVA if allocation failed + MDRVA position() const { return position_; } + + // Number of bytes allocated + size_t size() const { return size_; } + + // Return size and position + MDLocationDescriptor location() const { + MDLocationDescriptor location = { size_, position_ }; + return location; + } + + // Copy |size| bytes starting at |src| into the minidump at |position| + // Return true on success, or false on failure + bool Copy(MDRVA position, const void *src, size_t size) { + assert(position + size <= position_ + size_); + return writer_->Copy(position, src, size); + } + + // Copy |size| bytes from |src| to the current position + bool Copy(const void *src, size_t size) { + return Copy(position_, src, size); + } + + protected: + // Writer we associate with + MinidumpFileWriter *writer_; + + // Position of the start of the data + MDRVA position_; + + // Allocated size + size_t size_; +}; + +// Represents a Minidump object chunk. Additional memory can be allocated at +// the end of the object as a: +// - single allocation +// - Array of MDType objects +// - A MDType object followed by an array +template<typename MDType> +class TypedMDRVA : public UntypedMDRVA { + public: + // Constructs an unallocated MDRVA + explicit TypedMDRVA(MinidumpFileWriter *writer) + : UntypedMDRVA(writer), + data_(), + allocation_state_(UNALLOCATED) {} + + ~TypedMDRVA() { + // Ensure that the data_ object is written out + if (allocation_state_ != ARRAY) + Flush(); + } + + // Address of object data_ of MDType. This is not declared const as the + // typical usage will be to access the underlying |data_| object as to + // alter its contents. + MDType *get() { return &data_; } + + // Allocates sizeof(MDType) bytes. + // Must not call more than once. + // Return true on success, or false on failure + bool Allocate(); + + // Allocates sizeof(MDType) + |additional| bytes. + // Must not call more than once. + // Return true on success, or false on failure + bool Allocate(size_t additional); + + // Allocate an array of |count| elements of MDType. + // Must not call more than once. + // Return true on success, or false on failure + bool AllocateArray(size_t count); + + // Allocate an array of |count| elements of |size| after object of MDType + // Must not call more than once. + // Return true on success, or false on failure + bool AllocateObjectAndArray(unsigned int count, size_t size); + + // Copy |item| to |index| + // Must have been allocated using AllocateArray(). + // Return true on success, or false on failure + bool CopyIndex(unsigned int index, MDType *item); + + // Copy |size| bytes starting at |str| to |index| + // Must have been allocated using AllocateObjectAndArray(). + // Return true on success, or false on failure + bool CopyIndexAfterObject(unsigned int index, void *src, size_t size); + + // Write data_ + bool Flush(); + + private: + enum AllocationState { + UNALLOCATED = 0, + SINGLE_OBJECT, + ARRAY, + SINGLE_OBJECT_WITH_ARRAY + }; + + MDType data_; + AllocationState allocation_state_; +}; + +} // namespace google_airbag + +#endif // CLIENT_MINIDUMP_FILE_WRITER_H__ |