Hi! Copying glibc for your information/in case anyone has any further comments, and the man-pages maintainer, Michael Kerrisk. The issue is that abort might not flush all open streams before process termination; original thread starting at <http://news.gmane.org/find-root.php?message_id=%3C87twq4p9f4.fsf%40kepler.schwinge.homeip.net%3E>. On Tue, 06 Oct 2015 13:55:00 +0200, Andreas Schwab <schwab@xxxxxxxxxxxxxx> wrote: > Thomas Schwinge <thomas@xxxxxxxxxxxxxxxx> writes: > > > | The two regressed test cases use __builtin_printf instead of fprintf to > > | stderr, but as far as I know, abort is to flush all open streams before > > | process termination? > > It can't, since abort must be async-signal-safe. It's still surprising to me that the message written to stderr is lost in your aarch64-suse-linux-gnu configuration (only): from a quick look, (current) glibc's stdlib/abort.c tries to actually close/flush all open streams before process termination. This is also what's documented on <http://man7.org/linux/man-pages/man3/abort.3.html>: "all open streams are closed and flushed". <http://pubs.opengroup.org/onlinepubs/9699919799/functions/abort.html> does sound more "conservative": "[abort] may include an attempt to effect fclose() on all open streams". Should the man-page be edited to that effect? And, the following patch be applied to GCC? commit e270bce5dadf61b838706c4cfb824fa9dd22fb93 Author: Thomas Schwinge <thomas@xxxxxxxxxxxxxxxx> Date: Wed Oct 7 11:52:15 2015 +0200 abort might not flush all open streams before process termination libgomp/ * testsuite/libgomp.oacc-c-c++-common/abort-1.c: Print to stderr. * testsuite/libgomp.oacc-c-c++-common/abort-3.c: Likewise. --- libgomp/testsuite/libgomp.oacc-c-c++-common/abort-1.c | 3 ++- libgomp/testsuite/libgomp.oacc-c-c++-common/abort-3.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git libgomp/testsuite/libgomp.oacc-c-c++-common/abort-1.c libgomp/testsuite/libgomp.oacc-c-c++-common/abort-1.c index 6a9b1df..296708f 100644 --- libgomp/testsuite/libgomp.oacc-c-c++-common/abort-1.c +++ libgomp/testsuite/libgomp.oacc-c-c++-common/abort-1.c @@ -1,11 +1,12 @@ /* { dg-do run } */ +#include <stdio.h> #include <stdlib.h> int main (void) { - __builtin_printf ("CheCKpOInT\n"); + fprintf (stderr, "CheCKpOInT\n"); #pragma acc parallel { abort (); diff --git libgomp/testsuite/libgomp.oacc-c-c++-common/abort-3.c libgomp/testsuite/libgomp.oacc-c-c++-common/abort-3.c index 2c8f347..bca425e 100644 --- libgomp/testsuite/libgomp.oacc-c-c++-common/abort-3.c +++ libgomp/testsuite/libgomp.oacc-c-c++-common/abort-3.c @@ -1,11 +1,12 @@ /* { dg-do run } */ +#include <stdio.h> #include <stdlib.h> int main (void) { - __builtin_printf ("CheCKpOInT\n"); + fprintf (stderr, "CheCKpOInT\n"); #pragma acc kernels { abort (); Grüße, Thomas
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