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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/20126] [3.3/3.4/4.0 Regression] Inlined memcmp makes one argument null on entry Date: Tue, 22 Feb 2005 02:22:00 -0000 [thread overview] Message-ID: <20050221221528.8265.qmail@sourceware.org> (raw) In-Reply-To: <20050221214433.20126.jkohen@users.sourceforge.net> ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-21 22:15 ------- Reduced testcase (and shows that this is also a 3.3/3.4/4.0 Regression too): #include <string.h> #include <stdlib.h> #include <stdio.h> typedef struct { struct _object *_ob_next; struct _object *_ob_prev; int ob_refcnt; struct _typeobject *ob_type; int ob_size; long ob_shash; int ob_sstate; char ob_sval[1]; } strobject; static int string_contains(strobject *a, strobject *el) { const char *lhs, *rhs, *end; int size; size = (((el))->ob_size); rhs = (((el))->ob_sval); lhs = (((a))->ob_sval); if (size == 1) return memchr(lhs, *rhs, (((a))->ob_size)) != ((void *)0); end = lhs + ((((a))->ob_size) - size); while (lhs <= end) { const char *t = lhs+1; if (memcmp(lhs, rhs, size) == 0) return 1; lhs = t; } return 0; } int main(void) { char* s1 = "aa"; char* s2 = "aa"; strobject *obj1; strobject *obj2; obj1 = calloc(1, sizeof (*obj1) + 64); obj2 = calloc(1, sizeof (*obj2) + 64); obj1->ob_size = strlen(s1); obj2->ob_size = strlen(s2); memcpy(&obj1->ob_sval[0], s1, obj1->ob_size); memcpy(&obj2->ob_sval[0], s2, obj2->ob_size); printf("'%*s' in '%*s' = %d\n", obj2->ob_size, obj2->ob_sval, obj1->ob_size, obj1->ob_sval, string_contains(obj1, obj2)); return 0; } -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed| |1 Known to fail| |3.3.3 3.4.0 4.0.0 Known to work| |3.2.3 Last reconfirmed|0000-00-00 00:00:00 |2005-02-21 22:15:27 date| | Summary|Inlined memcmp makes one |[3.3/3.4/4.0 Regression] |argument null on entry |Inlined memcmp makes one | |argument null on entry Target Milestone|--- |3.4.4 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20126
next prev parent reply other threads:[~2005-02-21 22:15 UTC|newest] Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-02-22 1:42 [Bug c/20126] New: " jkohen at users dot sourceforge dot net 2005-02-22 1:44 ` [Bug c/20126] " jkohen at users dot sourceforge dot net 2005-02-22 1:47 ` [Bug target/20126] " pinskia at gcc dot gnu dot org 2005-02-22 1:49 ` jkohen at users dot sourceforge dot net 2005-02-22 1:50 ` pinskia at gcc dot gnu dot org 2005-02-22 1:51 ` pinskia at gcc dot gnu dot org 2005-02-22 2:22 ` pinskia at gcc dot gnu dot org [this message] 2005-02-22 15:55 ` [Bug target/20126] [3.3/3.4/4.0 Regression] " jakub at gcc dot gnu dot org 2005-02-22 17:03 ` jakub at gcc dot gnu dot org 2005-03-03 7:04 ` [Bug target/20126] [3.3/3.4/4.0/4.1 " aoliva at gcc dot gnu dot org 2005-03-03 7:07 ` aoliva at gcc dot gnu dot org 2005-03-07 21:57 ` aoliva at redhat dot com 2005-03-07 22:15 ` aoliva at gcc dot gnu dot org 2005-03-09 1:47 ` jakub at redhat dot com 2005-03-09 4:02 ` aoliva at redhat dot com 2005-03-09 8:51 ` jakub at redhat dot com 2005-03-09 9:24 ` jakub at redhat dot com 2005-03-10 11:45 ` aoliva at redhat dot com 2005-03-11 14:30 ` aoliva at redhat dot com 2005-04-02 17:22 ` aoliva at redhat dot com 2005-04-05 4:22 ` roger at eyesopen dot com 2005-04-08 16:34 ` aoliva at redhat dot com 2005-04-08 17:03 ` roger at eyesopen dot com 2005-04-08 20:51 ` aoliva at redhat dot com 2005-04-10 2:43 ` aoliva at redhat dot com 2005-04-10 3:18 ` roger at eyesopen dot com 2005-04-10 4:01 ` cvs-commit at gcc dot gnu dot org 2005-04-10 18:44 ` mark at codesourcery dot com 2005-04-10 21:00 ` [Bug target/20126] [3.3/3.4/4.0 " pinskia at gcc dot gnu dot org 2005-04-11 3:51 ` aoliva at redhat dot com 2005-04-11 21:11 ` jconner at apple dot com 2005-04-12 3:36 ` aoliva at redhat dot com 2005-04-12 6:59 ` aoliva at redhat dot com 2005-04-12 8:19 ` aoliva at redhat dot com 2005-04-12 14:39 ` roger at eyesopen dot com 2005-04-12 17:55 ` mmitchel at gcc dot gnu dot org 2005-04-13 9:47 ` jakub at redhat dot com 2005-04-13 10:10 ` bernds_cb1 at t-online dot de 2005-04-13 11:39 ` jakub at redhat dot com 2005-04-13 21:01 ` joseph at codesourcery dot com 2005-04-14 6:03 ` mark at codesourcery dot com 2005-04-14 6:14 ` cvs-commit at gcc dot gnu dot org 2005-04-14 17:21 ` aoliva at redhat dot com 2005-04-14 17:38 ` roger at eyesopen dot com 2005-04-15 3:31 ` aoliva at redhat dot com 2005-04-15 14:52 ` roger at eyesopen dot com 2005-04-16 17:50 ` rearnsha at gcc dot gnu dot org 2005-04-16 21:42 ` cvs-commit at gcc dot gnu dot org 2005-04-16 21:49 ` aoliva at redhat dot com 2005-04-16 21:58 ` aoliva at redhat dot com 2005-04-17 0:22 ` roger at eyesopen dot com 2005-04-17 2:38 ` aoliva at redhat dot com 2005-04-17 2:46 ` mmitchel at gcc dot gnu dot org 2005-04-17 3:06 ` roger at eyesopen dot com 2005-05-19 17:28 ` [Bug target/20126] [3.3/3.4 " mmitchel at gcc dot gnu dot org 2005-07-07 19:20 ` [Bug target/20126] [3.4 " uweigand at gcc dot gnu dot org 2005-07-08 12:25 ` aoliva at gcc dot gnu dot org 2005-07-08 15:48 ` uweigand at gcc dot gnu dot org 2005-07-11 3:56 ` cvs-commit at gcc dot gnu dot org 2005-07-12 4:11 ` belyshev at depni dot sinp dot msu dot ru 2005-07-13 22:30 ` uweigand at gcc dot gnu dot org 2005-07-14 18:48 ` aoliva at gcc dot gnu dot org 2005-07-14 21:17 ` cvs-commit at gcc dot gnu dot org 2005-08-04 23:12 ` belyshev at depni dot sinp dot msu dot ru
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