mirror of https://github.com/NekoX-Dev/NekoX.git
131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
// Copyright (c) 2013, 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 CLIENT_LINUX_MINIDUMP_WRITER_PROC_CPUINFO_READER_H_
|
|
#define CLIENT_LINUX_MINIDUMP_WRITER_PROC_CPUINFO_READER_H_
|
|
|
|
#include <stdint.h>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
#include "client/linux/minidump_writer/line_reader.h"
|
|
#include "common/linux/linux_libc_support.h"
|
|
#include "third_party/lss/linux_syscall_support.h"
|
|
|
|
namespace google_breakpad {
|
|
|
|
// A class for reading /proc/cpuinfo without using fopen/fgets or other
|
|
// functions which may allocate memory.
|
|
class ProcCpuInfoReader {
|
|
public:
|
|
ProcCpuInfoReader(int fd)
|
|
: line_reader_(fd), pop_count_(-1) {
|
|
}
|
|
|
|
// Return the next field name, or NULL in case of EOF.
|
|
// field: (output) Pointer to zero-terminated field name.
|
|
// Returns true on success, or false on EOF or error (line too long).
|
|
bool GetNextField(const char** field) {
|
|
for (;;) {
|
|
const char* line;
|
|
unsigned line_len;
|
|
|
|
// Try to read next line.
|
|
if (pop_count_ >= 0) {
|
|
line_reader_.PopLine(pop_count_);
|
|
pop_count_ = -1;
|
|
}
|
|
|
|
if (!line_reader_.GetNextLine(&line, &line_len))
|
|
return false;
|
|
|
|
pop_count_ = static_cast<int>(line_len);
|
|
|
|
const char* line_end = line + line_len;
|
|
|
|
// Expected format: <field-name> <space>+ ':' <space> <value>
|
|
// Note that:
|
|
// - empty lines happen.
|
|
// - <field-name> can contain spaces.
|
|
// - some fields have an empty <value>
|
|
char* sep = static_cast<char*>(my_memchr(line, ':', line_len));
|
|
if (sep == NULL)
|
|
continue;
|
|
|
|
// Record the value. Skip leading space after the column to get
|
|
// its start.
|
|
const char* val = sep+1;
|
|
while (val < line_end && my_isspace(*val))
|
|
val++;
|
|
|
|
value_ = val;
|
|
value_len_ = static_cast<size_t>(line_end - val);
|
|
|
|
// Remove trailing spaces before the column to properly 0-terminate
|
|
// the field name.
|
|
while (sep > line && my_isspace(sep[-1]))
|
|
sep--;
|
|
|
|
if (sep == line)
|
|
continue;
|
|
|
|
// zero-terminate field name.
|
|
*sep = '\0';
|
|
|
|
*field = line;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Return the field value. This must be called after a succesful
|
|
// call to GetNextField().
|
|
const char* GetValue() {
|
|
assert(value_);
|
|
return value_;
|
|
}
|
|
|
|
// Same as GetValue(), but also returns the length in characters of
|
|
// the value.
|
|
const char* GetValueAndLen(size_t* length) {
|
|
assert(value_);
|
|
*length = value_len_;
|
|
return value_;
|
|
}
|
|
|
|
private:
|
|
LineReader line_reader_;
|
|
int pop_count_;
|
|
const char* value_;
|
|
size_t value_len_;
|
|
};
|
|
|
|
} // namespace google_breakpad
|
|
|
|
#endif // CLIENT_LINUX_MINIDUMP_WRITER_PROC_CPUINFO_READER_H_
|