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re PR sanitizer/65367 (indefinite loop occurs with sanitize enabled and certain optimization options)

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PR sanitizer/65367
	* ubsan.c (ubsan_expand_objsize_ifn): Update GSI instead of GSI_ORIG
	when only removing the statement.  Handle expanding UBSAN_OBJECT_SIZE
	separately.

	* c-c++-common/ubsan/pr65367.c: New test.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r221325
This commit is contained in:
Marek Polacek 2015-03-10 15:57:45 +00:00 committed by Marek Polacek
parent dac2639d6d
commit 0757674c83
4 changed files with 28 additions and 1 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2015-03-10 Marek Polacek <polacek@redhat.com>
Jakub Jelinek <jakub@redhat.com>
PR sanitizer/65367
* ubsan.c (ubsan_expand_objsize_ifn): Update GSI instead of GSI_ORIG
when only removing the statement. Handle expanding UBSAN_OBJECT_SIZE
separately.
2015-03-10 Jakub Jelinek <jakub@redhat.com>
PR target/65286

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2015-03-10 Marek Polacek <polacek@redhat.com>
PR sanitizer/65367
* c-c++-common/ubsan/pr65367.c: New test.
2015-03-10 Ilya Enkovich <ilya.enkovich@intel.com>
* lib/mpx-dg.exp (mpx_link_flags): Set path to wrappers library.

9
gcc/testsuite/c-c++-common/ubsan/pr65367.c Normal file
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@ -0,0 +1,9 @@
/* PR sanitizer/65367 */
/* { dg-do compile } */
/* { dg-options "-fno-tree-ccp -fno-tree-copy-prop -fno-tree-dominator-opts -fno-tree-fre -fsanitize=object-size" } */
int
foo (char *p)
{
return *((const char *) "") - *p;
}

7
gcc/ubsan.c
View File

@ -1022,11 +1022,16 @@ ubsan_expand_objsize_ifn (gimple_stmt_iterator *gsi)
/* Point GSI to next logical statement. */
*gsi = gsi_start_bb (fallthru_bb);
/* Get rid of the UBSAN_OBJECT_SIZE call from the IR. */
unlink_stmt_vdef (stmt);
gsi_remove (&gsi_orig, true);
return true;
}
/* Get rid of the UBSAN_OBJECT_SIZE call from the IR. */
unlink_stmt_vdef (stmt);
gsi_remove (&gsi_orig, true);
gsi_remove (gsi, true);
return true;
}