search for: backtrace_symbols

So I got tired of LLVM's PrintStackTrace() function only being able to print mangled C++ names. I went ahead and wrote a demangler (shown below), however there's one slight problem, which is that the output of backtrace_symbols appears to be different on different platforms. In order to use the cxxabi demangler, you need to provide it with the portion of each line that contains the mangled name, and strip all of the other items on that line. In the case of OS X, the mangled symbol is delimited by whitespace, however o...

....h> void myfunc3(void) { int j, nptrs; #define SIZE 100 void *buffer[100]; char **strings; nptrs = backtrace(buffer, SIZE); printf("backtrace() returned %d addresses\n", nptrs); /* The call backtrace_symbols_fd(buffer, nptrs, STDOUT_FILENO) would produce similar output to the following: */ strings = backtrace_symbols(buffer, nptrs); if (strings == NULL) { perror("backtrace_symbols"); exit(EXIT_FAILURE); }...

...n I check my backtraces in lldb (stock lldb from Xcode 5.0) I don't see my DWARF debugging info as I expected - should I be? What is the status of DWARF debugging with MCJIT? Here's an example where I define three functions A, B, and C where A generates a backtrace (using backtrace(3) and backtrace_symbols(3)) and B calls A and C calls B. The backtrace entries at 6, 10, 14 are my functions a, b, and c. All there is is entries like: "??? <white-space> 0x00000001097ee44b 0x0 + 4454278219" > (defun a () (core::backtrace)) A > (defun b () (a)) B > (defun c () (b)) C > (c)...

Hi James, We've indeed passed the appropriate (and even excessive) flags to the appropriate pipeline parts, that is: llvm-gcc -O1 -fno-omit-frame-pointers -g $in -emit-llvm -S -o $name.ll llc --disable-fp-elim $name.ll -o $name.S g++ -fno-omit-frame-pointers -c $name.S , but that didn't work Alex On Tue, Apr 5, 2011 at 4:40 PM, James Molloy <James.Molloy at arm.com> wrote:

...n I check my backtraces in lldb (stock lldb from Xcode 5.0) I don't see my DWARF debugging info as I expected - should I be? What is the status of DWARF debugging with MCJIT? Here's an example where I define three functions A, B, and C where A generates a backtrace (using backtrace(3) and backtrace_symbols(3)) and B calls A and C calls B. The backtrace entries at 6, 10, 14 are my functions a, b, and c. All there is is entries like: "??? <white-space> 0x00000001097ee44b 0x0 + 4454278219" > (defun a () (core::backtrace)) A > (defun b () (a)) B > (defun c () (b)) C > (c) (...

...s LLVM IR on the fly, JITs, and executes. It also has a backtrace printer installed as a signal handler, that prints a human-readable backtrace if the app crashes. Is there a succinct guide to exactly what I need to do to the LLVM IR I generate (or the calls I make to JIT) so that backtrace() and backtrace_symbols() (on Linux or OS X) can correctly print the call stack when a crash occurs while executing the JITed code? -- Larry Gritz lg at larrygritz.com

...19 16:11:01 2008 +0200 +++ b/configure.in Wed Nov 19 14:31:56 2008 +0000 @@ -461,7 +461,8 @@ AC_CHECK_FUNCS(fcntl flock lockf inet_at setrlimit setproctitle seteuid setreuid setegid setresgid \ strtoull strtoll strtouq strtoq \ setpriority quotactl getmntent kqueue kevent backtrace_symbols \ - walkcontext dirfd clearenv malloc_usable_size clock_gettime) + walkcontext dirfd clearenv malloc_usable_size clock_gettime \ + setppriv) dnl strtoimax and strtoumax are macros in HP-UX, so inttypes.h must be included AC_MSG_CHECKING([for strtoimax]) diff -r 8f41c9f3f392...

...;all" target so cifs.upcall gets built at compile time rather than install time. o Davide Sfriso <sfriso@virgilio.it> * BUG 5906: Fix Winbind crash when calling ''getent group''. o Dan Sledz <dsledz@isilon.com> * Add FreeBSD configure check for backtrace_symbols. * Fix logging to syslog. * Allow SYSLOG_FACILITY to be modified with a new configure option called --with-syslog-facility. o Yasuma Takeda <yasuma@osstech.co.jp> * BUG 5909: Fix MS-DFS on Vista clients. * BUG 5944: Fix starting of nmbd with "socket address&quot...

...;all" target so cifs.upcall gets built at compile time rather than install time. o Davide Sfriso <sfriso@virgilio.it> * BUG 5906: Fix Winbind crash when calling ''getent group''. o Dan Sledz <dsledz@isilon.com> * Add FreeBSD configure check for backtrace_symbols. * Fix logging to syslog. * Allow SYSLOG_FACILITY to be modified with a new configure option called --with-syslog-facility. o Yasuma Takeda <yasuma@osstech.co.jp> * BUG 5909: Fix MS-DFS on Vista clients. * BUG 5944: Fix starting of nmbd with "socket address&quot...

...on to delete the credentials. * Fix circular dependency error with autoconf 2.6.3. o Davide Sfriso <sfriso@virgilio.it> * BUG 5906: Fix Winbind crash bug during ''getent group'' on PDC. o Dan Sledz <dsledz@isilon.com> * Add FreeBSD configure check for backtrace_symbols. * Allow SYSLOG_FACILITY to be modified with a new configure option called --with-syslog-facility. o Joe Smith <yasumoto7@gmail.com> * Fix typo in source/utils/net_rap.c. o Martin Schwenke <martin@meltin.net> * Prevent make errors for picky makes when $(EXTRA_A...

...on to delete the credentials. * Fix circular dependency error with autoconf 2.6.3. o Davide Sfriso <sfriso@virgilio.it> * BUG 5906: Fix Winbind crash bug during ''getent group'' on PDC. o Dan Sledz <dsledz@isilon.com> * Add FreeBSD configure check for backtrace_symbols. * Allow SYSLOG_FACILITY to be modified with a new configure option called --with-syslog-facility. o Joe Smith <yasumoto7@gmail.com> * Fix typo in source/utils/net_rap.c. o Martin Schwenke <martin@meltin.net> * Prevent make errors for picky makes when $(EXTRA_A...

...no checking execinfo.h presence... no checking for execinfo.h... no checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking libunwind.h usability... no checking libunwind.h presence... no checking for libunwind.h... no checking for library containing backtrace_symbols... no checking for backtrace_symbols... no checking for trace_back_stack in -lexc... no checking for sysctlbyname... no checking gpfs_gpl.h usability... no checking gpfs_gpl.h presence... no checking for gpfs_gpl.h... no checking for Isilon OneFS... no checking for libunwind... no checking for _dup...

...checking for symlink... yes checking for readlink... yes checking for syslog... yes checking for vsyslog... yes checking for timegm... yes checking for setlocale... yes checking for nl_langinfo... yes checking for setbuffer... yes checking for shmget... yes checking for shm_open... no checking for backtrace_symbols... yes checking for syscall... yes checking for _dup... no checking for _dup2... no checking for _opendir... no checking for _readdir... no checking for _seekdir... no checking for _telldir... no checking for _closedir... no checking for __dup... no checking for __dup2... yes checking for __opendir...

...no checking execinfo.h presence... no checking for execinfo.h... no checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking libunwind.h usability... no checking libunwind.h presence... no checking for libunwind.h... no checking for library containing backtrace_symbols... no checking for backtrace_symbols... no checking for trace_back_stack in -lexc... no checking for sysctlbyname... no checking gpfs_gpl.h usability... no checking gpfs_gpl.h presence... no checking for gpfs_gpl.h... no checking for Isilon OneFS... no checking for libunwind... no checking for _dup...

...hecking for readlink... yes checking for syslog... yes checking for vsyslog... yes checking for timegm... yes checking for setlocale... yes checking for nl_langinfo... yes checking for nanosleep... yes checking for setbuffer... yes checking for shmget... yes checking for shm_open... no checking for backtrace_symbols... yes checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking for trace_back_stack in -lexc... no checking for syscall... yes checking for _dup... no checking for _dup2... no checking for _opendir... no checking for _readdir... no checking for _seekd...

...info.h usability... no checking execinfo.h presence... no checking for execinfo.h... no checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking libunwind.h usability... no checking libunwind.h presence... no checking for libunwind.h... no checking for backtrace_symbols... no checking for trace_back_stack in -lexc... no checking for GPFS GPL libs... no checking for libunwind... no checking for _dup... yes checking for _dup2... yes checking for _opendir... yes checking for _readdir... yes checking for _seekdir... yes checking for _telldir... yes checking for _close...

...o checking for symlink... yes checking for readlink... yes checking for syslog... yes checking for vsyslog... no checking for timegm... no checking for setlocale... yes checking for nl_langinfo... yes checking for setbuffer... yes checking for shmget... yes checking for shm_open... yes checking for backtrace_symbols... no checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking for trace_back_stack in -lexc... no checking for syscall... no checking for _dup... no checking for _dup2... no checking for _opendir... no checking for _readdir... yes checking for _seekdi...

...o checking for symlink... yes checking for readlink... yes checking for syslog... yes checking for vsyslog... no checking for timegm... no checking for setlocale... yes checking for nl_langinfo... yes checking for setbuffer... yes checking for shmget... yes checking for shm_open... yes checking for backtrace_symbols... no checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking for trace_back_stack in -lexc... no checking for syscall... no checking for _dup... no checking for _dup2... no checking for _opendir... no checking for _readdir... yes checking for _seekdi...

...s checking execinfo.h presence... yes checking for execinfo.h... yes checking libexc.h usability... no checking libexc.h presence... no checking for libexc.h... no checking libunwind.h usability... no checking libunwind.h presence... no checking for libunwind.h... no checking for library containing backtrace_symbols... none required checking for backtrace_symbols... yes checking for trace_back_stack in -lexc... no checking for sysctlbyname... no checking for /proc/sys/kernel/core_pattern... yes checking gpfs_gpl.h usability... no checking gpfs_gpl.h presence... no checking for gpfs_gpl.h... no checking for Isi...

...: yes Checking for declaration of SA_SIGINFO : yes Checking for header execinfo.h : yes Checking for backtrace : ok Checking for backtrace_symbols : ok Checking for header libunwind.h : no Checking for member f_frsize in struct statvfs : yes Checking for statvfs (SVR4)...