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authorUlrich Drepper <drepper@redhat.com>1999-03-17 18:37:48 +0000
committerUlrich Drepper <drepper@redhat.com>1999-03-17 18:37:48 +0000
commitf2a378588802e646367201f7a961757e22702357 (patch)
tree55d9d5597c1719c9437546d5b0aae5d1a98b88e8 /sysdeps/generic/segfault.c
parente573146ab22ba7e286746965a0fea8be00f43fbd (diff)
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Update.
1999-03-17 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/segfault.c (write_strsignal): New function. (catch_segfault): Use it instead of calling strsignal.
Diffstat (limited to 'sysdeps/generic/segfault.c')
-rw-r--r--sysdeps/generic/segfault.c41
1 files changed, 34 insertions, 7 deletions
diff --git a/sysdeps/generic/segfault.c b/sysdeps/generic/segfault.c
index 848dae43dc..37c43c9208 100644
--- a/sysdeps/generic/segfault.c
+++ b/sysdeps/generic/segfault.c
@@ -22,6 +22,7 @@
#include <execinfo.h>
#include <fcntl.h>
#include <signal.h>
+#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
@@ -67,6 +68,10 @@ extern void *__libc_stack_end;
# define ADVANCE_STACK_FRAME(next) ((struct layout *) (next))
#endif
+/* We'll use tis a lot. */
+#define WRITE_STRING(s) write (fd, s, strlen (s))
+
+
struct layout
{
void *next;
@@ -74,6 +79,27 @@ struct layout
};
+/* Name of the output file. */
+static const char *fname;
+
+
+/* We better should not use `strerror' since it can call far too many
+ other functions which might fail. Do it here ourselves. */
+static void
+write_strsignal (int fd, int signal)
+{
+ if (signal < 0 || signal >= _NSIG || _sys_siglist[signal] == NULL)
+ {
+ char buf[30];
+ char *ptr = _itoa_word (signal, &buf[sizeof (buf)], 10, 0);
+ WRITE_STRING ("signal ");
+ write (fd, buf, &buf[sizeof (buf)] - ptr);
+ }
+ else
+ WRITE_STRING (_sys_siglist[signal]);
+}
+
+
/* This function is called when a segmentation fault is caught. The system
is in an instable state now. This means especially that malloc() might
not work anymore. */
@@ -83,28 +109,23 @@ catch_segfault (int signal, SIGCONTEXT ctx)
struct layout *current;
void *top_frame;
void *top_stack;
- const char *fname;
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. */
fd = 2;
- fname = getenv ("SEGFAULT_OUTPUT_NAME");
- if (fname != NULL && fname[0] != '\0')
+ if (fname != NULL)
{
fd = open (fname, O_TRUNC | O_WRONLY | O_CREAT, 0666);
if (fd == -1)
fd = 2;
}
-#define WRITE_STRING(s) write (fd, s, strlen (s))
WRITE_STRING ("*** ");
- sigstring = strsignal (signal);
- WRITE_STRING (sigstring);
+ write_strsignal (fd, signal);
WRITE_STRING ("\n");
#ifdef REGISTER_DUMP
@@ -164,6 +185,7 @@ install_handler (void)
{
struct sigaction sa;
const char *sigs = getenv ("SEGFAULT_SIGNALS");
+ const char *name;
sa.sa_handler = (void *) catch_segfault;
sigemptyset (&sa.sa_mask);
@@ -214,4 +236,9 @@ install_handler (void)
INSTALL_FOR_SIG (SIGABRT, "abrt");
INSTALL_FOR_SIG (SIGFPE, "fpe");
}
+
+ /* Preserve the output file name if there is any given. */
+ name = getenv ("SEGFAULT_OUTPUT_NAME");
+ if (name != NULL && name[0] != '\0')
+ fname = __strdup (name);
}