From ed1ac6a2d6c744bdbd4751efc86326ceafeac26c Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Mon, 24 Aug 1998 16:46:16 +0000 Subject: Update. 1998-08-24 16:34 Ulrich Drepper * debug/catchsegv.sh: Handle text preceding backtrace better. * sysdeps/generic/segfault.c: Allow register dump. Allow handler to be installed for other signals than SIGSEGV. * sysdeps/generic/register-dump.h: New file. * sysdeps/i386/register-dump.h: New file. * sysdeps/powerpc/register-dump.h: New file. * sysdeps/unix/sysv/linux/i386/profil-counter.h: Use macros from sigcontextinfo.h. * sysdeps/unix/sysv/linux/powerpc/profil-counter.h: Use i386 version. 1998-08-24 Geoff Keating * sysdeps/unix/sysv/linux/powerpc/sigcontextinfo.h: New file. 1998-08-09 Geoff Keating * sysdeps/unix/sysv/linux/powerpc/chown.c: New file. * sysdeps/unix/sysv/linux/powerpc/lchown.S: New file. * sysdeps/unix/sysv/linux/powerpc/syscalls.list: Add chown, remove getresuid, getresgid. 1998-08-16 Geoff Keating * sysdeps/unix/sysv/linux/powerpc/clone.S: Fix bugs. Set up stack pointer in userland. 1998-08-21 Andreas Schwab * sysdeps/unix/sysv/linux/sys/mount.h (MNT_FORCE): Define as enum and fix value. 1998-08-22 Andreas Schwab * elf/ldd.bash.in: Add missing quotes around $file. Make loop over arguments Bourne shell compatible. Don't exit unsuccessfully if nonelf returns successfully. Avoid duplicating most of the script. * sysdeps/unix/sysv/linux/ldd-rewrite.sed: Add missing quotes around $file. 1998-08-24 10:37 Andreas Schwab * libio/Versions (_IO_do_write, _IO_file_attach, _IO_file_close_it, _IO_file_finish, _IO_file_fopen, _IO_file_init, _IO_file_overflow, _IO_file_seekoff, _IO_file_setbuf, _IO_file_sync, _IO_file_underflow, _IO_file_write, _IO_file_xsputn): Added to GLIBC_2.1. * libio/fileops.c (_IO_do_write, _IO_file_attach, _IO_file_close_it, _IO_file_finish, _IO_file_fopen, _IO_file_init, _IO_file_overflow, _IO_file_seekoff, _IO_file_setbuf, _IO_file_sync, _IO_file_underflow, _IO_file_write, _IO_file_xsputn): Change the prefix to "_IO_new_". Added to GLIBC_2.1. * libio/libioP.h (_IO_do_write, _IO_file_attach, _IO_file_close_it, _IO_file_finish, _IO_file_fopen, _IO_file_init, _IO_file_overflow, _IO_file_seekoff, _IO_file_setbuf, _IO_file_sync, _IO_file_underflow, _IO_file_write, _IO_file_xsputn): Add prototypes for the prefix "_IO_new_". * libio/oldfileops.c (_IO_do_write, _IO_file_attach, _IO_file_close_it, _IO_file_finish, _IO_file_fopen, _IO_file_init, _IO_file_overflow, _IO_file_seekoff, _IO_file_setbuf, _IO_file_sync, _IO_file_underflow, _IO_file_write, _IO_file_xsputn): Added to GLIBC_2.0. * csu/initfini.c: Return to .text before __gmon_start__. * elf/elf.h (EM_FAKE_ALPHA): Rename from EM_OLD_ALPHA. (STO_MIPS_*): Rename from STO_*. (STB_MIPS_SPLIT_COMMON): Rename from STB_SPLIT_COMMON. (STO_ALPHA_NOPV, STO_ALPHA_STD_GPLOAD): New. * math/atest-exp.c (mpn_bitsize): Fix bit location calculation. (main): e3s is negative on zero. * math/atest-exp2.c: Likewise. 1998-08-23 Andreas Jaeger * Makerules (install): Add comment about absolute paths. --- sysdeps/generic/segfault.c | 55 +++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 49 insertions(+), 6 deletions(-) (limited to 'sysdeps/generic/segfault.c') diff --git a/sysdeps/generic/segfault.c b/sysdeps/generic/segfault.c index 6504123e18..090f91a657 100644 --- a/sysdeps/generic/segfault.c +++ b/sysdeps/generic/segfault.c @@ -18,16 +18,21 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include #include #include #include #include +#include #include /* This file defines macros to access the content of the sigcontext element passed up by the signal handler. */ #include +/* Get code to possibly dump the content of all registers. */ +#include + /* This is a global variable set at program start time. It marks the highest used stack address. */ extern void *__libc_stack_end; @@ -76,6 +81,8 @@ catch_segfault (int signal, SIGCONTEXT ctx) int fd; void **arr; size_t cnt; + struct sigaction sa; + const char *sigstring; /* This is the name of the file we are writing to. If none is given or we cannot write to this file write to stderr. */ @@ -88,9 +95,17 @@ catch_segfault (int signal, SIGCONTEXT ctx) fd = 2; } -#define WRITE_STRING(s) write (fd, s, sizeof (s) - 1) - WRITE_STRING ("*** Segmentation Fault\n"); - WRITE_STRING ("Backtrace:\n"); +#define WRITE_STRING(s) write (fd, s, strlen (s)) + WRITE_STRING ("*** "); + sigstring = strsignal (signal); + WRITE_STRING (sigstring); + WRITE_STRING ("\n"); + +#ifdef REGISTER_DUMP + REGISTER_DUMP; +#endif + + WRITE_STRING ("\nBacktrace:\n"); top_frame = GET_FRAME (ctx); top_stack = GET_STACK (ctx); @@ -124,8 +139,12 @@ catch_segfault (int signal, SIGCONTEXT ctx) /* Now generate nicely formatted output. */ __backtrace_symbols_fd (arr, cnt, fd); - /* Nothing else to do. */ - _exit (128 + SIGSEGV); + /* Pass on the signal (so that a core file is produced). */ + sa.sa_handler = SIG_DFL; + sigemptyset (&sa.sa_mask); + sa.sa_flags = 0; + sigaction (signal, &sa, NULL); + raise (signal); } @@ -134,12 +153,36 @@ __attribute__ ((constructor)) install_handler (void) { struct sigaction sa; + const char *sigs = getenv ("SEGFAULT_SIGNALS"); sa.sa_handler = (void *) catch_segfault; sigemptyset (&sa.sa_mask); sa.sa_flags = SA_RESTART; - sigaction (SIGSEGV, &sa, NULL); + if (sigs == NULL) + sigaction (SIGSEGV, &sa, NULL); + else if (sigs[0] == '\0') + /* Do not do anything. */ + return; + else + { + const char *where; + int all = __strcasecmp (sigs, "all"); + +#define INSTALL_FOR_SIG(sig, name) \ + where = __strcasestr (sigs, name); \ + if (all || (where != NULL \ + && (where == sigs || !isalnum (where[-1])) \ + && !isalnum (where[sizeof (name) - 1]))) \ + sigaction (sig, &sa, NULL); + + INSTALL_FOR_SIG (SIGSEGV, "segv"); + INSTALL_FOR_SIG (SIGILL, "ill"); + INSTALL_FOR_SIG (SIGBUS, "bus"); + INSTALL_FOR_SIG (SIGSTKFLT, "stkflt"); + INSTALL_FOR_SIG (SIGABRT, "abrt"); + INSTALL_FOR_SIG (SIGFPE, "fpe"); + } /* Maybe we are expected to use an alternative stack. */ if (getenv ("SEGFAULT_USE_ALTSTACK") != 0) -- cgit v1.2.3