Bug#31891 Meaningful stack trace

On crashes generate a user-friendly resolved and demangled stack
trace when libc provides the necessary functions (newer libc on i386,
x86_64, powerpc, ia64, alpha and s390). Otherwise print a numeric
stack trace as before, relying on resolve_stack_dump utility.


configure.in:
  Add check for backtrace headers, backtrace functions and if
  __cxa_demangle (libstdc++) is available at link time.
sql/mysqld.cc:
  Print the value of the THD::killed variable when dumping. In
  some circumstances knowing if the thread was killed makes
  debugging easier.
sql/stacktrace.c:
  Use the glibc backtrace function when available and demangle
  C++ function names if the __cxa_demangle function is available.
sql/stacktrace.h:
  Locally export and wrap in C linkage the C++ function __cxa_demangle
  if available.

configure.in

@@ -813,8 +813,8 @@ AC_CHECK_HEADERS(fcntl.h float.h floatingpoint.h ieeefp.h limits.h \
  sys/timeb.h sys/types.h sys/un.h sys/vadvise.h sys/wait.h term.h \
  unistd.h utime.h sys/utime.h termio.h termios.h sched.h crypt.h alloca.h \
  sys/ioctl.h malloc.h sys/malloc.h sys/ipc.h sys/shm.h linux/config.h \
- sys/prctl.h \
- sys/resource.h sys/param.h port.h ieeefp.h)
+ sys/prctl.h sys/resource.h sys/param.h port.h ieeefp.h \
+ execinfo.h)
 
 AC_CHECK_HEADERS([xfs/xfs.h])
 
@@ -2041,7 +2041,7 @@ AC_CHECK_FUNCS(alarm bcmp bfill bmove bsearch bzero \
   sighold sigset sigthreadmask port_create sleep \
   snprintf socket stpcpy strcasecmp strerror strsignal strnlen strpbrk strstr \
   strtol strtoll strtoul strtoull tell tempnam thr_setconcurrency vidattr \
-  posix_fallocate)
+  posix_fallocate backtrace backtrace_symbols backtrace_symbols_fd)
 
 #
 #
@@ -2331,6 +2331,21 @@ then
 fi
 AC_MSG_RESULT("$netinet_inc")
 
+AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+AC_CHECK_HEADERS(cxxabi.h)
+AC_CACHE_CHECK([checking for abi::__cxa_demangle], mysql_cv_cxa_demangle,
+[AC_TRY_LINK([#include <cxxabi.h>], [
+  char *foo= 0; int bar= 0;
+  foo= abi::__cxa_demangle(foo, foo, 0, &bar);
+], [mysql_cv_cxa_demangle=yes], [mysql_cv_cxa_demangle=no])])
+AC_LANG_RESTORE
+
+if test "x$mysql_cv_cxa_demangle" = xyes; then
+  AC_DEFINE(HAVE_ABI_CXA_DEMANGLE, 1,
+            [Define to 1 if you have the `abi::__cxa_demangle' function.])
+fi
+
 #--------------------------------------------------------------------
 # Check for requested features
 #--------------------------------------------------------------------