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-rw-r--r--src/tools/linux/md2core/minidump-2-core.cc602
1 files changed, 602 insertions, 0 deletions
diff --git a/src/tools/linux/md2core/minidump-2-core.cc b/src/tools/linux/md2core/minidump-2-core.cc
new file mode 100644
index 00000000..e333d119
--- /dev/null
+++ b/src/tools/linux/md2core/minidump-2-core.cc
@@ -0,0 +1,602 @@
+// 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.
+
+// Converts a minidump file to a core file which gdb can read.
+// Large parts lifted from the userspace core dumper:
+// http://code.google.com/p/google-coredumper/
+//
+// Usage: minidump-2-core 1234.dmp > core
+
+#include <vector>
+
+#include <stdio.h>
+#include <string.h>
+
+#include <elf.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/user.h>
+#include <sys/mman.h>
+
+#include "google_breakpad/common/minidump_format.h"
+#include "google_breakpad/common/minidump_cpu_x86.h"
+#include "breakpad/linux/minidump_format_linux.h"
+
+#if __WORDSIZE == 64
+ #define ELF_CLASS ELFCLASS64
+ #define Ehdr Elf64_Ehdr
+ #define Phdr Elf64_Phdr
+ #define Shdr Elf64_Shdr
+ #define Nhdr Elf64_Nhdr
+ #define auxv_t Elf64_auxv_t
+#else
+ #define ELF_CLASS ELFCLASS32
+ #define Ehdr Elf32_Ehdr
+ #define Phdr Elf32_Phdr
+ #define Shdr Elf32_Shdr
+ #define Nhdr Elf32_Nhdr
+ #define auxv_t Elf32_auxv_t
+#endif
+
+
+#if defined(__x86_64__)
+ #define ELF_ARCH EM_X86_64
+#elif defined(__i386__)
+ #define ELF_ARCH EM_386
+#elif defined(__ARM_ARCH_3__)
+ #define ELF_ARCH EM_ARM
+#elif defined(__mips__)
+ #define ELF_ARCH EM_MIPS
+#endif
+
+static int usage(const char* argv0) {
+ fprintf(stderr, "Usage: %s <minidump file>\n", argv0);
+ return 1;
+}
+
+// Write all of the given buffer, handling short writes and EINTR. Return true
+// iff successful.
+static bool
+writea(int fd, const void* idata, size_t length) {
+ const uint8_t* data = (const uint8_t*) idata;
+
+ size_t done = 0;
+ while (done < length) {
+ ssize_t r;
+ do {
+ r = write(fd, data + done, length - done);
+ } while (r == -1 && errno == EINTR);
+
+ if (r < 1)
+ return false;
+ done += r;
+ }
+
+ return true;
+}
+
+// A range of a mmaped file.
+class MMappedRange {
+ public:
+ MMappedRange(const void* data, size_t length)
+ : data_(reinterpret_cast<const uint8_t*>(data)),
+ length_(length) {
+ }
+
+ // Get an object of |length| bytes at |offset| and return a pointer to it
+ // unless it's out of bounds.
+ const void* GetObject(size_t offset, size_t length) {
+ if (offset + length < offset)
+ return NULL;
+ if (offset + length > length_)
+ return NULL;
+ return data_ + offset;
+ }
+
+ // Get element |index| of an array of objects of length |length| starting at
+ // |offset| bytes. Return NULL if out of bounds.
+ const void* GetArrayElement(size_t offset, size_t length, unsigned index) {
+ const size_t element_offset = offset + index * length;
+ return GetObject(element_offset, length);
+ }
+
+ // Return a new range which is a subset of this range.
+ MMappedRange Subrange(const MDLocationDescriptor& location) const {
+ if (location.rva > length_ ||
+ location.rva + location.data_size < location.rva ||
+ location.rva + location.data_size > length_) {
+ return MMappedRange(NULL, 0);
+ }
+
+ return MMappedRange(data_ + location.rva, location.data_size);
+ }
+
+ const uint8_t* data() const { return data_; }
+ size_t length() const { return length_; }
+
+ private:
+ const uint8_t* const data_;
+ const size_t length_;
+};
+
+/* Dynamically determines the byte sex of the system. Returns non-zero
+ * for big-endian machines.
+ */
+static inline int sex() {
+ int probe = 1;
+ return !*(char *)&probe;
+}
+
+typedef struct elf_timeval { /* Time value with microsecond resolution */
+ long tv_sec; /* Seconds */
+ long tv_usec; /* Microseconds */
+} elf_timeval;
+
+typedef struct elf_siginfo { /* Information about signal (unused) */
+ int32_t si_signo; /* Signal number */
+ int32_t si_code; /* Extra code */
+ int32_t si_errno; /* Errno */
+} elf_siginfo;
+
+typedef struct prstatus { /* Information about thread; includes CPU reg*/
+ elf_siginfo pr_info; /* Info associated with signal */
+ uint16_t pr_cursig; /* Current signal */
+ unsigned long pr_sigpend; /* Set of pending signals */
+ unsigned long pr_sighold; /* Set of held signals */
+ pid_t pr_pid; /* Process ID */
+ pid_t pr_ppid; /* Parent's process ID */
+ pid_t pr_pgrp; /* Group ID */
+ pid_t pr_sid; /* Session ID */
+ elf_timeval pr_utime; /* User time */
+ elf_timeval pr_stime; /* System time */
+ elf_timeval pr_cutime; /* Cumulative user time */
+ elf_timeval pr_cstime; /* Cumulative system time */
+ user_regs_struct pr_reg; /* CPU registers */
+ uint32_t pr_fpvalid; /* True if math co-processor being used */
+} prstatus;
+
+typedef struct prpsinfo { /* Information about process */
+ unsigned char pr_state; /* Numeric process state */
+ char pr_sname; /* Char for pr_state */
+ unsigned char pr_zomb; /* Zombie */
+ signed char pr_nice; /* Nice val */
+ unsigned long pr_flag; /* Flags */
+#if defined(__x86_64__) || defined(__mips__)
+ uint32_t pr_uid; /* User ID */
+ uint32_t pr_gid; /* Group ID */
+#else
+ uint16_t pr_uid; /* User ID */
+ uint16_t pr_gid; /* Group ID */
+#endif
+ pid_t pr_pid; /* Process ID */
+ pid_t pr_ppid; /* Parent's process ID */
+ pid_t pr_pgrp; /* Group ID */
+ pid_t pr_sid; /* Session ID */
+ char pr_fname[16]; /* Filename of executable */
+ char pr_psargs[80]; /* Initial part of arg list */
+} prpsinfo;
+
+// We parse the minidump file and keep the parsed information in this structure.
+struct CrashedProcess {
+ CrashedProcess()
+ : crashing_tid(-1),
+ auxv(NULL),
+ auxv_length(0) {
+ memset(&prps, 0, sizeof(prps));
+ prps.pr_sname = 'R';
+ }
+
+ struct Mapping {
+ uint64_t start_address, end_address;
+ };
+ std::vector<Mapping> mappings;
+
+ pid_t crashing_tid;
+ int fatal_signal;
+
+ struct Thread {
+ pid_t tid;
+ user_regs_struct regs;
+ user_fpregs_struct fpregs;
+ user_fpxregs_struct fpxregs;
+ uintptr_t stack_addr;
+ const uint8_t* stack;
+ size_t stack_length;
+ };
+ std::vector<Thread> threads;
+
+ const uint8_t* auxv;
+ size_t auxv_length;
+
+ prpsinfo prps;
+};
+
+static uint32_t
+U32(const uint8_t* data) {
+ uint32_t v;
+ memcpy(&v, data, sizeof(v));
+ return v;
+}
+
+static uint16_t
+U16(const uint8_t* data) {
+ uint16_t v;
+ memcpy(&v, data, sizeof(v));
+ return v;
+}
+
+#if defined(__i386__)
+static void
+ParseThreadRegisters(CrashedProcess::Thread* thread, MMappedRange range) {
+ const MDRawContextX86* rawregs =
+ (const MDRawContextX86*) range.GetObject(0, sizeof(MDRawContextX86));
+
+ thread->regs.ebx = rawregs->ebx;
+ thread->regs.ecx = rawregs->ecx;
+ thread->regs.edx = rawregs->edx;
+ thread->regs.esi = rawregs->esi;
+ thread->regs.edi = rawregs->edi;
+ thread->regs.ebp = rawregs->ebp;
+ thread->regs.eax = rawregs->eax;
+ thread->regs.xds = rawregs->ds;
+ thread->regs.xes = rawregs->es;
+ thread->regs.xfs = rawregs->fs;
+ thread->regs.xgs = rawregs->gs;
+ thread->regs.orig_eax = rawregs->eax;
+ thread->regs.eip = rawregs->eip;
+ thread->regs.xcs = rawregs->cs;
+ thread->regs.eflags = rawregs->eflags;
+ thread->regs.esp = rawregs->esp;
+ thread->regs.xss = rawregs->ss;
+
+ thread->fpregs.cwd = rawregs->float_save.control_word;
+ thread->fpregs.swd = rawregs->float_save.status_word;
+ thread->fpregs.twd = rawregs->float_save.tag_word;
+ thread->fpregs.fip = rawregs->float_save.error_offset;
+ thread->fpregs.fcs = rawregs->float_save.error_selector;
+ thread->fpregs.foo = rawregs->float_save.data_offset;
+ thread->fpregs.fos = rawregs->float_save.data_selector;
+ memcpy(thread->fpregs.st_space, rawregs->float_save.register_area,
+ 10 * 8);
+
+ thread->fpxregs.cwd = rawregs->float_save.control_word;
+ thread->fpxregs.swd = rawregs->float_save.status_word;
+ thread->fpxregs.twd = rawregs->float_save.tag_word;
+ thread->fpxregs.fop = U16(rawregs->extended_registers + 6);
+ thread->fpxregs.fip = U16(rawregs->extended_registers + 8);
+ thread->fpxregs.fcs = U16(rawregs->extended_registers + 12);
+ thread->fpxregs.foo = U16(rawregs->extended_registers + 16);
+ thread->fpxregs.fos = U16(rawregs->extended_registers + 20);
+ thread->fpxregs.mxcsr = U32(rawregs->extended_registers + 24);
+ memcpy(thread->fpxregs.st_space, rawregs->extended_registers + 32, 128);
+ memcpy(thread->fpxregs.xmm_space, rawregs->extended_registers + 160, 128);
+}
+#else
+#error "This code has not been ported to your platform yet"
+#endif
+
+static void
+ParseThreadList(CrashedProcess* crashinfo, MMappedRange range,
+ const MMappedRange& full_file) {
+ const uint32_t num_threads =
+ *(const uint32_t*) range.GetObject(0, sizeof(uint32_t));
+ for (unsigned i = 0; i < num_threads; ++i) {
+ CrashedProcess::Thread thread;
+ memset(&thread, 0, sizeof(thread));
+ const MDRawThread* rawthread =
+ (MDRawThread*) range.GetArrayElement(sizeof(uint32_t),
+ sizeof(MDRawThread), i);
+ thread.tid = rawthread->thread_id;
+ thread.stack_addr = rawthread->stack.start_of_memory_range;
+ MMappedRange stack_range = full_file.Subrange(rawthread->stack.memory);
+ thread.stack = stack_range.data();
+ thread.stack_length = rawthread->stack.memory.data_size;
+
+ ParseThreadRegisters(&thread,
+ full_file.Subrange(rawthread->thread_context));
+
+ crashinfo->threads.push_back(thread);
+ }
+}
+
+static void
+ParseAuxVector(CrashedProcess* crashinfo, MMappedRange range) {
+ crashinfo->auxv = range.data();
+ crashinfo->auxv_length = range.length();
+}
+
+static void
+ParseCmdLine(CrashedProcess* crashinfo, MMappedRange range) {
+ const char* cmdline = (const char*) range.data();
+ for (size_t i = 0; i < range.length(); ++i) {
+ if (cmdline[i] == 0) {
+ static const size_t fname_len = sizeof(crashinfo->prps.pr_fname) - 1;
+ static const size_t args_len = sizeof(crashinfo->prps.pr_psargs) - 1;
+ memset(crashinfo->prps.pr_fname, 0, fname_len + 1);
+ memset(crashinfo->prps.pr_psargs, 0, args_len + 1);
+ const char* binary_name = strrchr(cmdline, '/');
+ if (binary_name) {
+ binary_name++;
+ const unsigned len = strlen(binary_name);
+ memcpy(crashinfo->prps.pr_fname, binary_name,
+ len > fname_len ? fname_len : len);
+ } else {
+ memcpy(crashinfo->prps.pr_fname, cmdline,
+ i > fname_len ? fname_len : i);
+ }
+
+ const unsigned len = range.length() > args_len ?
+ args_len : range.length();
+ memcpy(crashinfo->prps.pr_psargs, cmdline, len);
+ for (unsigned i = 0; i < len; ++i) {
+ if (crashinfo->prps.pr_psargs[i] == 0)
+ crashinfo->prps.pr_psargs[i] = ' ';
+ }
+ }
+ }
+}
+
+static void
+ParseExceptionStream(CrashedProcess* crashinfo, MMappedRange range) {
+ const MDRawExceptionStream* exp =
+ (MDRawExceptionStream*) range.GetObject(0, sizeof(MDRawExceptionStream));
+ crashinfo->crashing_tid = exp->thread_id;
+ crashinfo->fatal_signal = (int) exp->exception_record.exception_code;
+}
+
+static bool
+WriteThread(const CrashedProcess::Thread& thread, int fatal_signal) {
+ struct prstatus pr;
+ memset(&pr, 0, sizeof(pr));
+
+ pr.pr_info.si_signo = fatal_signal;
+ pr.pr_cursig = fatal_signal;
+ pr.pr_pid = thread.tid;
+ memcpy(&pr.pr_reg, &thread.regs, sizeof(user_regs_struct));
+
+ Nhdr nhdr;
+ memset(&nhdr, 0, sizeof(nhdr));
+ nhdr.n_namesz = 5;
+ nhdr.n_descsz = sizeof(struct prstatus);
+ nhdr.n_type = NT_PRSTATUS;
+ if (!writea(1, &nhdr, sizeof(nhdr)) ||
+ !writea(1, "CORE\0\0\0\0", 8) ||
+ !writea(1, &pr, sizeof(struct prstatus))) {
+ return false;
+ }
+
+ nhdr.n_descsz = sizeof(user_fpregs_struct);
+ nhdr.n_type = NT_FPREGSET;
+ if (!writea(1, &nhdr, sizeof(nhdr)) ||
+ !writea(1, "CORE\0\0\0\0", 8) ||
+ !writea(1, &thread.fpregs, sizeof(user_fpregs_struct))) {
+ return false;
+ }
+
+ nhdr.n_descsz = sizeof(user_fpxregs_struct);
+ nhdr.n_type = NT_PRXFPREG;
+ if (!writea(1, &nhdr, sizeof(nhdr)) ||
+ !writea(1, "LINUX\0\0\0", 8) ||
+ !writea(1, &thread.fpxregs, sizeof(user_fpxregs_struct))) {
+ return false;
+ }
+
+ return true;
+}
+
+static void
+ParseModuleStream(CrashedProcess* crashinfo, MMappedRange range) {
+ const uint32_t num_mappings =
+ *(const uint32_t*) range.GetObject(0, sizeof(uint32_t));
+ for (unsigned i = 0; i < num_mappings; ++i) {
+ CrashedProcess::Mapping mapping;
+ const MDRawModule* rawmodule =
+ (MDRawModule*) range.GetArrayElement(sizeof(uint32_t),
+ sizeof(MDRawModule), i);
+ mapping.start_address = rawmodule->base_of_image;
+ mapping.end_address = rawmodule->size_of_image + rawmodule->base_of_image;
+
+ crashinfo->mappings.push_back(mapping);
+ }
+}
+
+int
+main(int argc, char** argv) {
+ if (argc != 2)
+ return usage(argv[0]);
+
+ const int fd = open(argv[1], O_RDONLY);
+ if (fd < 0)
+ return usage(argv[0]);
+
+ struct stat st;
+ fstat(fd, &st);
+
+ const void* bytes = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ close(fd);
+ if (bytes == MAP_FAILED) {
+ perror("Failed to mmap dump file");
+ return 1;
+ }
+
+ MMappedRange dump(bytes, st.st_size);
+
+ const MDRawHeader* header =
+ (const MDRawHeader*) dump.GetObject(0, sizeof(MDRawHeader));
+
+ CrashedProcess crashinfo;
+
+ for (unsigned i = 0; i < header->stream_count; ++i) {
+ const MDRawDirectory* dirent =
+ (const MDRawDirectory*) dump.GetArrayElement(
+ header->stream_directory_rva, sizeof(MDRawDirectory), i);
+ switch (dirent->stream_type) {
+ case MD_THREAD_LIST_STREAM:
+ ParseThreadList(&crashinfo, dump.Subrange(dirent->location), dump);
+ break;
+ case MD_LINUX_AUXV:
+ ParseAuxVector(&crashinfo, dump.Subrange(dirent->location));
+ break;
+ case MD_LINUX_CMD_LINE:
+ ParseCmdLine(&crashinfo, dump.Subrange(dirent->location));
+ break;
+ case MD_EXCEPTION_STREAM:
+ ParseExceptionStream(&crashinfo, dump.Subrange(dirent->location));
+ break;
+ case MD_MODULE_LIST_STREAM:
+ ParseModuleStream(&crashinfo, dump.Subrange(dirent->location));
+ default:
+ fprintf(stderr, "Skipping %x\n", dirent->stream_type);
+ }
+ }
+
+ // Write the ELF header. The file will look like:
+ // ELF header
+ // Phdr for the PT_NOTE
+ // Phdr for each of the thread stacks
+ // PT_NOTE
+ // each of the thread stacks
+ Ehdr ehdr;
+ memset(&ehdr, 0, sizeof(Ehdr));
+ ehdr.e_ident[0] = ELFMAG0;
+ ehdr.e_ident[1] = ELFMAG1;
+ ehdr.e_ident[2] = ELFMAG2;
+ ehdr.e_ident[3] = ELFMAG3;
+ ehdr.e_ident[4] = ELF_CLASS;
+ ehdr.e_ident[5] = sex() ? ELFDATA2MSB : ELFDATA2LSB;
+ ehdr.e_ident[6] = EV_CURRENT;
+ ehdr.e_type = ET_CORE;
+ ehdr.e_machine = ELF_ARCH;
+ ehdr.e_version = EV_CURRENT;
+ ehdr.e_phoff = sizeof(Ehdr);
+ ehdr.e_ehsize = sizeof(Ehdr);
+ ehdr.e_phentsize= sizeof(Phdr);
+ ehdr.e_phnum = 1 + crashinfo.threads.size() + crashinfo.mappings.size();
+ ehdr.e_shentsize= sizeof(Shdr);
+ if (!writea(1, &ehdr, sizeof(Ehdr)))
+ return 1;
+
+ size_t offset = sizeof(Ehdr) +
+ (1 + crashinfo.threads.size() +
+ crashinfo.mappings.size()) * sizeof(Phdr);
+ size_t filesz = sizeof(Nhdr) + 8 + sizeof(prpsinfo) +
+ // sizeof(Nhdr) + 8 + sizeof(user) +
+ sizeof(Nhdr) + 8 + crashinfo.auxv_length +
+ crashinfo.threads.size() * (
+ (sizeof(Nhdr) + 8 + sizeof(prstatus)) +
+ sizeof(Nhdr) + 8 + sizeof(user_fpregs_struct) +
+ sizeof(Nhdr) + 8 + sizeof(user_fpxregs_struct));
+
+ Phdr phdr;
+ memset(&phdr, 0, sizeof(Phdr));
+ phdr.p_type = PT_NOTE;
+ phdr.p_offset = offset;
+ phdr.p_filesz = filesz;
+ if (!writea(1, &phdr, sizeof(phdr)))
+ return 1;
+
+ phdr.p_type = PT_LOAD;
+ phdr.p_align = getpagesize();
+ size_t note_align = phdr.p_align - ((offset+filesz) % phdr.p_align);
+ if (note_align == phdr.p_align)
+ note_align = 0;
+ offset += note_align;
+
+ for (unsigned i = 0; i < crashinfo.threads.size(); ++i) {
+ const CrashedProcess::Thread& thread = crashinfo.threads[i];
+ offset += filesz;
+ filesz = thread.stack_length;
+ phdr.p_offset = offset;
+ phdr.p_vaddr = thread.stack_addr;
+ phdr.p_filesz = phdr.p_memsz = filesz;
+ phdr.p_flags = PF_R | PF_W;
+ if (!writea(1, &phdr, sizeof(phdr)))
+ return 1;
+ }
+
+ for (unsigned i = 0; i < crashinfo.mappings.size(); ++i) {
+ const CrashedProcess::Mapping& mapping = crashinfo.mappings[i];
+ phdr.p_offset = 0;
+ phdr.p_vaddr = mapping.start_address;
+ phdr.p_filesz = 0;
+ phdr.p_flags = PF_R;
+ phdr.p_memsz = mapping.end_address - mapping.start_address;
+ if (!writea(1, &phdr, sizeof(phdr)))
+ return 1;
+ }
+
+ Nhdr nhdr;
+ memset(&nhdr, 0, sizeof(nhdr));
+ nhdr.n_namesz = 5;
+ nhdr.n_descsz = sizeof(prpsinfo);
+ nhdr.n_type = NT_PRPSINFO;
+ if (!writea(1, &nhdr, sizeof(nhdr)) ||
+ !writea(1, "CORE\0\0\0\0", 8) ||
+ !writea(1, &crashinfo.prps, sizeof(prpsinfo))) {
+ return 1;
+ }
+
+ nhdr.n_descsz = crashinfo.auxv_length;
+ nhdr.n_type = NT_AUXV;
+ if (!writea(1, &nhdr, sizeof(nhdr)) ||
+ !writea(1, "CORE\0\0\0\0", 8) ||
+ !writea(1, &crashinfo.auxv, crashinfo.auxv_length)) {
+ return 1;
+ }
+
+ for (unsigned i = 0; i < crashinfo.threads.size(); ++i) {
+ if (crashinfo.threads[i].tid == crashinfo.crashing_tid) {
+ WriteThread(crashinfo.threads[i], crashinfo.fatal_signal);
+ break;
+ }
+ }
+
+ for (unsigned i = 0; i < crashinfo.threads.size(); ++i) {
+ if (crashinfo.threads[i].tid != crashinfo.crashing_tid)
+ WriteThread(crashinfo.threads[i], 0);
+ }
+
+ if (note_align) {
+ char scratch[note_align];
+ memset(scratch, 0, sizeof(scratch));
+ if (!writea(1, scratch, sizeof(scratch)))
+ return 1;
+ }
+
+ for (unsigned i = 0; i < crashinfo.threads.size(); ++i) {
+ const CrashedProcess::Thread& thread = crashinfo.threads[i];
+ if (!writea(1, thread.stack, thread.stack_length))
+ return 1;
+ }
+
+ munmap(const_cast<void*>(bytes), st.st_size);
+
+ return 0;
+}
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