[Bug sanitizer/63948] New: Sanitizer testsuite full of failures on darwin

["fxcoudert at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63948

            Bug ID: 63948
           Summary: Sanitizer testsuite full of failures on darwin
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fxcoudert at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org

sanitizer's testsuite is full of failures on x86_64-apple-darwin14, to the
point of making test results hardly readable:
https://gcc.gnu.org/ml/gcc-testresults/2014-11/msg01921.html

Maybe there are some real failures in there, but it seems they're mostly
failures to match output, like global-overflow-1.c, where we output this:

==41438==ERROR: AddressSanitizer: global-buffer-overflow on address
0x000101ce122a at pc 0x000101ce0d88 bp 0x7fff5df1fa10 sp 0x7fff5df1fa08
READ of size 1 at 0x000101ce122a thread T0
    #0 0x101ce0d87  (/Users/fx/devel/gcc/irun2/./a.out+0x100000d87)
    #1 0x7fff942575c8  (/usr/lib/system/libdyld.dylib+0x35c8)
    #2 0x0  (<unknown module>)

0x000101ce122a is located 0 bytes to the right of global variable 'YYY' defined
in 'global-overflow-1.c:15:15' (0x101ce1220) of size 10
0x000101ce122a is located 54 bytes to the left of global variable 'ZZZ' defined
in 'global-overflow-1.c:16:15' (0x101ce1260) of size 10

and I believe this does not match the regexp in the testcase:

/* { dg-output "READ of size 1 at 0x\[0-9a-f\]+ thread T0.*(\n|\r\n|\r)" } */
/* { dg-output "    #0 0x\[0-9a-f\]+ (in _*main
(\[^\n\r]*global-overflow-1.c:20|\[^\n\r]*:0)|\[(\])\[^\n\r]*(\n|\r\n|\r).*" }
*/
/* { dg-output "0x\[0-9a-f\]+ is located 0 bytes to the right of global
variable" } */
/* { dg-output ".*YYY\[^\n\r]* of size 10\[^\n\r]*(\n|\r\n|\r)" } */

(though that second line is hard to parse). I suppose the dg-output expects
symbol names, and they are not produced on darwin. In the meantime, the
testcases should be amended.