12-07-2012
Quote:
Originally Posted by
Corona688
Don't install a signal handler then, and have the signal cause the coredump directly.
He'd likely just get a different signal handler - it's the signal handler that causes the core dump. It's also likely that the default signal handling is deemed insufficient for some reason, thus the custom signal handler.
What's the exact external command used to generate the core file? Is it dumping everything?
What's the output from pstack run against the core file? Does that show the full stack trace?
What's the output from dbx when you load the core file? Core file mismatch perhaps? What does it say about what was executing when the core was dumped?
What's the output from "where -h"? How about "where -v"?
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LEARN ABOUT DEBIAN
sysv_signal
SYSV_SIGNAL(3) Linux Programmer's Manual SYSV_SIGNAL(3)
NAME
sysv_signal - signal handling with System V semantics
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <signal.h>
typedef void (*sighandler_t)(int);
sighandler_t sysv_signal(int signum, sighandler_t handler);
DESCRIPTION
The sysv_signal() function takes the same arguments, and performs the same task, as signal(2).
However sysv_signal() provides the System V unreliable signal semantics, that is: a) the disposition of the signal is reset to the default
when the handler is invoked; b) delivery of further instances of the signal is not blocked while the signal handler is executing; and c) if
the handler interrupts (certain) blocking system calls, then the system call is not automatically restarted.
RETURN VALUE
The sysv_signal() function returns the previous value of the signal handler, or SIG_ERR on error.
ERRORS
As for signal(2).
CONFORMING TO
This function is nonstandard.
NOTES
Use of sysv_signal() should be avoided; use sigaction(2) instead.
On older Linux systems, sysv_signal() and signal(2) were equivalent. But on newer systems, signal(2) provides reliable signal semantics;
see signal(2) for details.
The use of sighandler_t is a GNU extension; this type is only defined if the _GNU_SOURCE feature test macro is defined.
SEE ALSO
sigaction(2), signal(2), bsd_signal(3), signal(7)
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2007-05-04 SYSV_SIGNAL(3)