* squid-2.4.DEVEL3-hno.devel.automatic_stacktraces.patch *

--enable-stacktraces configure option to set PRINT_STACK_TRACE, and
extends support for this to Linux/GNU libc.

Index: squid/acconfig.h
diff -u squid/acconfig.h:1.1.1.3.6.5.2.2 squid/acconfig.h:1.1.1.3.6.5.2.3
--- squid/acconfig.h:1.1.1.3.6.5.2.2	Tue May 16 11:53:51 2000
+++ squid/acconfig.h	Tue May 16 12:38:15 2000
@@ -280,3 +280,6 @@
 
 /* Define if you want to set the COSS membuf size */
 #undef COSS_MEMBUF_SZ
+
+/* Print stacktraces on fatal errors */
+#undef PRINT_STACK_TRACE
Index: squid/configure.in
diff -u squid/configure.in:1.1.1.3.6.7.2.8 squid/configure.in:1.1.1.3.6.7.2.9
--- squid/configure.in:1.1.1.3.6.7.2.8	Tue May 16 11:53:51 2000
+++ squid/configure.in	Tue May 16 12:38:15 2000
@@ -701,6 +701,15 @@
 AC_SUBST(OPT_UNLINKD_EXE)
 AC_SUBST(UNLINKD_OBJS)
 
+dnl Enable backtraces on fatal errors
+AC_ARG_ENABLE(stacktraces,
+[  --enable-stacktraces    Enable automatic call backtrace on fatal errors],
+[ if test "$enableval" = "yes" ; then
+    echo "Enabling automatic stack backtraces on fatal errors"
+    AC_DEFINE(PRINT_STACK_TRACE, 1)
+  fi
+])
+
 # Force some compilers to use ANSI features
 #
 case "$host" in
@@ -765,6 +774,7 @@
 	crypt.h \
 	ctype.h \
 	errno.h \
+	execinfo.h \
 	fcntl.h \
 	getopt.h \
 	gnumalloc.h \
@@ -1124,6 +1134,7 @@
 dnl Check for library functions
 AC_CHECK_FUNCS(\
 	bcopy \
+	backtrace_symbols_fd \
 	crypt \
 	fchmod \
 	getdtablesize \
Index: squid/src/tools.c
diff -u squid/src/tools.c:1.1.1.3.6.1.2.1 squid/src/tools.c:1.1.1.3.6.1.2.2
--- squid/src/tools.c:1.1.1.3.6.1.2.1	Tue May 16 11:53:53 2000
+++ squid/src/tools.c	Tue May 16 12:38:16 2000
@@ -254,6 +254,14 @@
 	fflush(stdout);
     }
 #endif /* _SQUID_SOLARIS_ */
+#if HAVE_BACKTRACE_SYMBOLS_FD
+    {
+	static void *(callarray[8192]);
+	int n;
+	n = backtrace(callarray, 8192);
+	backtrace_symbols_fd(callarray, n, fileno(debug_log));
+    }
+#endif
 #endif /* PRINT_STACK_TRACE */
 
 #if SA_RESETHAND == 0