Linux: Use upstream google-breakpad instead of our fork....

breakpad/linux/linux_dumper.h

-// Copyright (c) 2009, 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_HANDLER_LINUX_DUMPER_H_
-#define CLIENT_LINUX_HANDLER_LINUX_DUMPER_H_
-
-#include <sys/types.h>
-#include <elf.h>
-#include <stdint.h>
-#include <sys/user.h>
-#include <linux/limits.h>
-
-#include "breakpad/linux/memory.h"
-
-namespace google_breakpad {
-
-typedef typeof(((struct user*) 0)->u_debugreg[0]) debugreg_t;
-
-// Typedef for our parsing of the auxv variables in /proc/pid/auxv.
-#if defined(__i386)
-typedef Elf32_auxv_t elf_aux_entry;
-#elif defined(__x86_64__)
-typedef Elf64_auxv_t elf_aux_entry;
-#endif
-// When we find the VDSO mapping in the process's address space, this
-// is the name we use for it when writing it to the minidump.
-// This should always be less than NAME_MAX!
-const char kLinuxGateLibraryName[] = "linux-gate.so";
-
-// We produce one of these structures for each thread in the crashed process.
-struct ThreadInfo {
-  pid_t tgid;   // thread group id
-  pid_t ppid;   // parent process
-
-  // Even on platforms where the stack grows down, the following will point to
-  // the smallest address in the stack.
-  const void* stack;  // pointer to the stack area
-  size_t stack_len;  // length of the stack to copy
-
-  user_regs_struct regs;
-  user_fpregs_struct fpregs;
-#if defined(__i386)
-  user_fpxregs_struct fpxregs;
-#endif
-
-#if defined(__i386) || defined(__x86_64)
-  static const unsigned kNumDebugRegisters = 8;
-  debugreg_t dregs[8];
-#endif
-};
-
-// One of these is produced for each mapping in the process (i.e. line in
-// /proc/$x/maps).
-struct MappingInfo {
-  uintptr_t start_addr;
-  size_t size;
-  size_t offset;  // offset into the backed file.
-  char name[NAME_MAX];
-};
-
-class LinuxDumper {
- public:
-  explicit LinuxDumper(pid_t pid);
-
-  // Parse the data for |threads| and |mappings|.
-  bool Init();
-
-  // Suspend/resume all threads in the given process.
-  bool ThreadsSuspend();
-  bool ThreadsResume();
-
-  // Read information about the given thread. Returns true on success. One must
-  // have called |ThreadsSuspend| first.
-  bool ThreadInfoGet(pid_t tid, ThreadInfo* info);
-
-  // These are only valid after a call to |Init|.
-  const wasteful_vector<pid_t> &threads() { return threads_; }
-  const wasteful_vector<MappingInfo*> &mappings() { return mappings_; }
-  const MappingInfo* FindMapping(const void* address) const;
-
-  // Find a block of memory to take as the stack given the top of stack pointer.
-  //   stack: (output) the lowest address in the memory area
-  //   stack_len: (output) the length of the memory area
-  //   stack_top: the current top of the stack
-  bool GetStackInfo(const void** stack, size_t* stack_len, uintptr_t stack_top);
-
-  PageAllocator* allocator() { return &allocator_; }
-
-  // memcpy from a remote process.
-  static void CopyFromProcess(void* dest, pid_t child, const void* src,
-                              size_t length);
-
-  // Builds a proc path for a certain pid for a node.  path is a
-  // character array that is overwritten, and node is the final node
-  // without any slashes.
-  void BuildProcPath(char* path, pid_t pid, const char* node) const;
-
-  // Utility method to find the location of where the kernel has
-  // mapped linux-gate.so in memory(shows up in /proc/pid/maps as
-  // [vdso], but we can't guarantee that it's the only virtual dynamic
-  // shared object.  Parsing the auxilary vector for AT_SYSINFO_EHDR
-  // is the safest way to go.)
-  void* FindBeginningOfLinuxGateSharedLibrary(const pid_t pid) const;
- private:
-  bool EnumerateMappings(wasteful_vector<MappingInfo*>* result) const;
-  bool EnumerateThreads(wasteful_vector<pid_t>* result) const;
-
-  const pid_t pid_;
-
-  mutable PageAllocator allocator_;
-
-  bool threads_suspened_;
-  wasteful_vector<pid_t> threads_;  // the ids of all the threads
-  wasteful_vector<MappingInfo*> mappings_;  // info from /proc/<pid>/maps
-};
-
-}  // namespace google_breakpad
-
-#endif  // CLIENT_LINUX_HANDLER_LINUX_DUMPER_H_