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PR 46686 Implement backtrace with _Unwind_Backtrace from libgcc.

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2011-11-09  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/46686
	* configure.ac: Don't check execinfo.h, backtrace,
	backtrace_symbols_fd. Check execve instead of execvp. Call
	GCC_CHECK_UNWIND_GETIPINFO.
	* runtime/backtrace.c: Don't include unused headers, include
	limits.h and unwind.h.
	(CAN_FORK): Check execve instead of execvp.
	(GLIBC_BACKTRACE): Remove.
	(bt_header): Conform to gdb backtrace format.
	(struct bt_state): New struct.
	(trace_function): New function.
	(show_backtrace): Use _Unwind_Backtrace from libgcc instead of
	glibc backtrace functions.
	* Makefile.in: Regenerated.
	* aclocal.m4: Regenerated.
	* config.h.in: Regenerated.
	* configure: Regenerated.

From-SVN: r181209
This commit is contained in:
Janne Blomqvist 2011-11-09 18:04:42 +02:00
parent 560bb0136f
commit 1ff101ff12
7 changed files with 189 additions and 189 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
libgfortran/ChangeLog
View File

@ -1,3 +1,23 @@
2011-11-09 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/46686
* configure.ac: Don't check execinfo.h, backtrace,
backtrace_symbols_fd. Check execve instead of execvp. Call
GCC_CHECK_UNWIND_GETIPINFO.
* runtime/backtrace.c: Don't include unused headers, include
limits.h and unwind.h.
(CAN_FORK): Check execve instead of execvp.
(GLIBC_BACKTRACE): Remove.
(bt_header): Conform to gdb backtrace format.
(struct bt_state): New struct.
(trace_function): New function.
(show_backtrace): Use _Unwind_Backtrace from libgcc instead of
glibc backtrace functions.
* Makefile.in: Regenerated.
* aclocal.m4: Regenerated.
* config.h.in: Regenerated.
* configure: Regenerated.
2011-11-09 Janne Blomqvist <jb@gcc.gnu.org>
PR libfortran/50016

1
libgfortran/Makefile.in
View File

@ -51,6 +51,7 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/depstand.m4 \
$(top_srcdir)/../config/multi.m4 \
$(top_srcdir)/../config/override.m4 \
$(top_srcdir)/../config/stdint.m4 \
$(top_srcdir)/../config/unwind_ipinfo.m4 \
$(top_srcdir)/../ltoptions.m4 $(top_srcdir)/../ltsugar.m4 \
$(top_srcdir)/../ltversion.m4 $(top_srcdir)/../lt~obsolete.m4 \
$(top_srcdir)/acinclude.m4 $(top_srcdir)/../config/acx.m4 \

1
libgfortran/aclocal.m4 vendored
View File

@ -974,6 +974,7 @@ m4_include([../config/lthostflags.m4])
m4_include([../config/multi.m4])
m4_include([../config/override.m4])
m4_include([../config/stdint.m4])
m4_include([../config/unwind_ipinfo.m4])
m4_include([../ltoptions.m4])
m4_include([../ltsugar.m4])
m4_include([../ltversion.m4])

16
libgfortran/config.h.in
View File

@ -81,12 +81,6 @@
/* Define to 1 if the target supports __attribute__((visibility(...))). */
#undef HAVE_ATTRIBUTE_VISIBILITY
/* Define to 1 if you have the `backtrace' function. */
#undef HAVE_BACKTRACE
/* Define to 1 if you have the `backtrace_symbols_fd' function. */
#undef HAVE_BACKTRACE_SYMBOLS_FD
/* Define if powf is broken. */
#undef HAVE_BROKEN_POWF
@ -348,14 +342,11 @@
/* libm includes erfl */
#undef HAVE_ERFL
/* Define to 1 if you have the <execinfo.h> header file. */
#undef HAVE_EXECINFO_H
/* Define to 1 if you have the `execl' function. */
#undef HAVE_EXECL
/* Define to 1 if you have the `execvp' function. */
#undef HAVE_EXECVP
/* Define to 1 if you have the `execve' function. */
#undef HAVE_EXECVE
/* libm includes exp */
#undef HAVE_EXP
@ -453,6 +444,9 @@
/* Define to 1 if you have the `gethostname' function. */
#undef HAVE_GETHOSTNAME
/* Define if _Unwind_GetIPInfo is available. */
#undef HAVE_GETIPINFO
/* Define to 1 if you have the `getlogin' function. */
#undef HAVE_GETLOGIN

63
libgfortran/configure vendored
View File

@ -766,6 +766,7 @@ with_gnu_ld
enable_libtool_lock
enable_largefile
enable_libquadmath_support
with_system_libunwind
'
ac_precious_vars='build_alias
host_alias
@ -1424,6 +1425,7 @@ Optional Packages:
--with-pic try to use only PIC/non-PIC objects [default=use
both]
--with-gnu-ld assume the C compiler uses GNU ld [default=no]
--with-system-libunwind use installed libunwind
Some influential environment variables:
CC C compiler command
@ -12112,7 +12114,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 12115 "configure"
#line 12117 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -12218,7 +12220,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 12221 "configure"
#line 12223 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -15919,7 +15921,7 @@ fi
done
for ac_header in fenv.h fptrap.h float.h execinfo.h pwd.h
for ac_header in fenv.h fptrap.h float.h pwd.h
do :
as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
@ -16419,7 +16421,7 @@ _ACEOF
fi
done
for ac_func in wait setmode execvp pipe dup2 close fdopen strcasestr getrlimit
for ac_func in wait setmode execve pipe dup2 close fdopen strcasestr getrlimit
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@ -16472,21 +16474,6 @@ fi
done
# Check for glibc backtrace functions
for ac_func in backtrace backtrace_symbols_fd
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
eval as_val=\$$as_ac_var
if test "x$as_val" = x""yes; then :
cat >>confdefs.h <<_ACEOF
#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
_ACEOF
fi
done
# Check libc for getgid, getpid, getuid
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for getgid in -lc" >&5
$as_echo_n "checking for getgid in -lc... " >&6; }
@ -25880,6 +25867,44 @@ $as_echo "#define HAVE_CRLF 1" >>confdefs.h
fi
# Check whether we have _Unwind_GetIPInfo for backtrace
# Check whether --with-system-libunwind was given.
if test "${with_system_libunwind+set}" = set; then :
withval=$with_system_libunwind;
fi
# If system-libunwind was not specifically set, pick a default setting.
if test x$with_system_libunwind = x; then
case ${target} in
ia64-*-hpux*) with_system_libunwind=yes ;;
*) with_system_libunwind=no ;;
esac
fi
# Based on system-libunwind and target, do we have ipinfo?
if test x$with_system_libunwind = xyes; then
case ${target} in
ia64-*-*) have_unwind_getipinfo=no ;;
*) have_unwind_getipinfo=yes ;;
esac
else
# Darwin before version 9 does not have _Unwind_GetIPInfo.
case ${target} in
*-*-darwin[3-8]|*-*-darwin[3-8].*) have_unwind_getipinfo=no ;;
*) have_unwind_getipinfo=yes ;;
esac
fi
if test x$have_unwind_getipinfo = xyes; then
$as_echo "#define HAVE_GETIPINFO 1" >>confdefs.h
fi
cat >confcache <<\_ACEOF
# This file is a shell script that caches the results of configure
# tests run on this system so they can be shared between configure

10
libgfortran/configure.ac
View File

@ -249,7 +249,7 @@ AC_HEADER_TIME
AC_HAVE_HEADERS(stdio.h stdlib.h string.h unistd.h signal.h stdarg.h)
AC_CHECK_HEADERS(time.h sys/time.h sys/times.h sys/resource.h)
AC_CHECK_HEADERS(sys/types.h sys/stat.h sys/wait.h floatingpoint.h ieeefp.h)
AC_CHECK_HEADERS(fenv.h fptrap.h float.h execinfo.h pwd.h)
AC_CHECK_HEADERS(fenv.h fptrap.h float.h pwd.h)
AC_CHECK_HEADER([complex.h],[AC_DEFINE([HAVE_COMPLEX_H], [1], [complex.h exists])])
GCC_HEADER_STDINT(gstdint.h)
@ -261,14 +261,11 @@ AC_CHECK_MEMBERS([struct stat.st_rdev])
AC_CHECK_FUNCS(getrusage times mkstemp strtof strtold snprintf ftruncate chsize)
AC_CHECK_FUNCS(chdir strerror getlogin gethostname kill link symlink perror)
AC_CHECK_FUNCS(sleep time ttyname signal alarm clock access fork execl)
AC_CHECK_FUNCS(wait setmode execvp pipe dup2 close fdopen strcasestr getrlimit)
AC_CHECK_FUNCS(wait setmode execve pipe dup2 close fdopen strcasestr getrlimit)
AC_CHECK_FUNCS(gettimeofday stat fstat lstat getpwuid vsnprintf dup getcwd)
AC_CHECK_FUNCS(localtime_r gmtime_r strerror_r getpwuid_r ttyname_r)
AC_CHECK_FUNCS(clock_gettime strftime readlink)
# Check for glibc backtrace functions
AC_CHECK_FUNCS(backtrace backtrace_symbols_fd)
# Check libc for getgid, getpid, getuid
AC_CHECK_LIB([c],[getgid],[AC_DEFINE([HAVE_GETGID],[1],[libc includes getgid])])
AC_CHECK_LIB([c],[getpid],[AC_DEFINE([HAVE_GETPID],[1],[libc includes getpid])])
@ -559,6 +556,9 @@ LIBGFOR_CHECK_UNLINK_OPEN_FILE
# Check whether line terminator is LF or CRLF
LIBGFOR_CHECK_CRLF
# Check whether we have _Unwind_GetIPInfo for backtrace
GCC_CHECK_UNWIND_GETIPINFO
AC_CACHE_SAVE
if test ${multilib} = yes; then

267
libgfortran/runtime/backtrace.c
View File

@ -26,46 +26,38 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#include <string.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_EXECINFO_H
#include <execinfo.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <ctype.h>
#include <limits.h>
#include "unwind.h"
/* Macros for common sets of capabilities: can we fork and exec, can
we use glibc-style backtrace functions, and can we use pipes. */
#define CAN_FORK (defined(HAVE_FORK) && defined(HAVE_EXECVP) \
#define CAN_FORK (defined(HAVE_FORK) && defined(HAVE_EXECVE) \
&& defined(HAVE_WAIT))
#define GLIBC_BACKTRACE (defined(HAVE_BACKTRACE) \
&& defined(HAVE_BACKTRACE_SYMBOLS_FD))
#define CAN_PIPE (CAN_FORK && defined(HAVE_PIPE) \
&& defined(HAVE_DUP2) && defined(HAVE_FDOPEN) \
&& defined(HAVE_CLOSE))
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
/* GDB style #NUM index for each stack frame. */
static void
bt_header (int num)
{
st_printf (" #%d ", num);
st_printf ("#%d ", num);
}
@ -106,24 +98,105 @@ fd_gets (char *s, int size, int fd)
extern char *addr2line_path;
/* Struct containing backtrace state. */
typedef struct
{
int frame_number;
int direct_output;
int outfd;
int infd;
int error;
}
bt_state;
/* show_backtrace displays the backtrace, currently obtained by means of
the glibc backtrace* functions. */
static _Unwind_Reason_Code
trace_function (struct _Unwind_Context *context, void *state_ptr)
{
bt_state* state = (bt_state*) state_ptr;
_Unwind_Ptr ip;
#ifdef HAVE_GETIPINFO
int ip_before_insn = 0;
ip = _Unwind_GetIPInfo (context, &ip_before_insn);
/* If the unwinder gave us a 'return' address, roll it back a little
to ensure we get the correct line number for the call itself. */
if (! ip_before_insn)
--ip;
#else
ip = _Unwind_GetIP (context);
#endif
if (state->direct_output)
{
bt_header(state->frame_number);
st_printf ("%p\n", (void*) ip);
}
else
{
char addr_buf[GFC_XTOA_BUF_SIZE], func[1024], file[PATH_MAX];
char *p;
const char* addr = gfc_xtoa (ip, addr_buf, sizeof (addr_buf));
write (state->outfd, addr, strlen (addr));
write (state->outfd, "\n", 1);
if (! fd_gets (func, sizeof(func), state->infd))
{
state->error = 1;
goto done;
}
if (! fd_gets (file, sizeof(file), state->infd))
{
state->error = 1;
goto done;
}
for (p = func; *p != '\n' && *p != '\r'; p++)
;
*p = '\0';
/* _start is a setup routine that calls main(), and main() is
the frontend routine that calls some setup stuff and then
calls MAIN__, so at this point we should stop. */
if (strcmp (func, "_start") == 0 || strcmp (func, "main") == 0)
return _URC_END_OF_STACK;
bt_header (state->frame_number);
estr_write ("0x");
estr_write (addr);
if (func[0] != '?' && func[1] != '?')
{
estr_write (" in ");
estr_write (func);
}
if (strncmp (file, "??", 2) == 0)
estr_write ("\n");
else
{
estr_write (" at ");
estr_write (file);
}
}
done:
state->frame_number++;
return _URC_NO_REASON;
}
/* Display the backtrace. */
void
show_backtrace (void)
{
#if GLIBC_BACKTRACE
bt_state state;
state.frame_number = 0;
state.error = 0;
#define DEPTH 50
#define BUFSIZE 1024
void *trace[DEPTH];
int depth;
depth = backtrace (trace, DEPTH);
if (depth <= 0)
return;
estr_write ("\nA fatal error occurred! Backtrace for this error:\n");
#if CAN_PIPE
@ -134,9 +207,7 @@ show_backtrace (void)
do
{
/* Local variables. */
int f[2], pid, bt[2], inp[2];
char addr_buf[GFC_XTOA_BUF_SIZE], func[BUFSIZE], file[BUFSIZE];
char *p;
int f[2], pid, inp[2];
/* Don't output an error message if something goes wrong, we'll simply
fall back to the pstack and glibc backtraces. */
@ -182,139 +253,27 @@ show_backtrace (void)
/* Father process. */
close (f[1]);
close (inp[0]);
if (pipe (bt) != 0)
break;
backtrace_symbols_fd (trace, depth, bt[1]);
close (bt[1]);
estr_write ("\nBacktrace for this error:\n");
for (int j = 0; j < depth; j++)
{
const char *addr = gfc_xtoa
((GFC_UINTEGER_LARGEST) (intptr_t) trace[j],
addr_buf, sizeof (addr_buf));
write (inp[1], addr, strlen (addr));
write (inp[1], "\n", 1);
if (! fd_gets (func, sizeof(func), f[0]))
goto fallback;
if (! fd_gets (file, sizeof(file), f[0]))
goto fallback;
for (p = func; *p != '\n' && *p != '\r'; p++)
;
*p = '\0';
/* If we only have the address, use the glibc backtrace. */
if (func[0] == '?' && func[1] == '?' && file[0] == '?'
&& file[1] == '?')
{
bt_header (j);
while (1)
{
char bc;
ssize_t nread = read (bt[0], &bc, 1);
if (nread != 1 || bc == '\n')
break;
write (STDERR_FILENO, &bc, 1);
}
estr_write ("\n");
continue;
}
else
{
/* Forward to the next entry in the backtrace. */
while (1)
{
char bc;
ssize_t nread = read (bt[0], &bc, 1);
if (nread != 1 || bc == '\n')
break;
}
}
/* _start is a setup routine that calls main(), and main() is
the frontend routine that calls some setup stuff and then
calls MAIN__, so at this point we should stop. */
if (strcmp (func, "_start") == 0 || strcmp (func, "main") == 0)
break;
bt_header (j);
estr_write (full_exe_path ());
estr_write ("[0x");
estr_write (addr);
estr_write ("] in ");
estr_write (func);
if (strncmp (file, "??", 2) == 0)
estr_write ("\n");
else
{
estr_write (" at ");
estr_write (file);
}
} /* Loop over each hex address. */
state.outfd = inp[1];
state.infd = f[0];
state.direct_output = 0;
_Unwind_Backtrace (trace_function, &state);
if (state.error)
goto fallback;
close (inp[1]);
close (bt[0]);
wait (NULL);
return;
fallback:
estr_write ("** Something went wrong while running addr2line. **\n"
"** Falling back to a simpler backtrace scheme. **\n");
"** Falling back to a simpler backtrace scheme. **\n");
}
while (0);
#undef DEPTH
#undef BUFSIZE
#endif /* CAN_PIPE */
fallback_noerr:
/* Fallback to the glibc backtrace. */
estr_write ("\nBacktrace for this error:\n");
backtrace_symbols_fd (trace, depth, STDERR_FILENO);
return;
#elif defined(CAN_FORK) && defined(HAVE_GETPPID)
/* Try to call pstack. */
do
{
/* Local variables. */
int pid;
/* Don't output an error message if something goes wrong, we'll simply
fall back to the pstack and glibc backtraces. */
if ((pid = fork ()) == -1)
break;
if (pid == 0)
{
/* Child process. */
#define NUM_ARGS 2
char *arg[NUM_ARGS+1];
char buf[20];
estr_write ("\nBacktrace for this error:\n");
arg[0] = (char *) "pstack";
snprintf (buf, sizeof(buf), "%d", (int) getppid ());
arg[1] = buf;
arg[2] = NULL;
execvp (arg[0], arg);
#undef NUM_ARGS
/* pstack didn't work. */
estr_write (" unable to produce a backtrace, sorry!\n");
_exit (1);
}
/* Father process. */
wait (NULL);
return;
}
while(0);
#else
estr_write ("\nBacktrace not yet available on this platform, sorry!\n");
#endif
/* Fallback to the simple backtrace without addr2line. */
state.direct_output = 1;
_Unwind_Backtrace (trace_function, &state);
}