On 05/23/14 08:50, Yury Gribov wrote:
> On ARM the asan tests have always been a random generator of PASS /
> FAIL on qemu despite efforts to "nobble" qemu for /proc/self/maps
> outputs.
This should improve once upstream Asan sets up an ARM build bot. This
has been discussed recently but noone has yet volunteered to do the
server installation and setup.
> After the merge I see these new failures instead
A pity that gcc-testresults does not report mismatched lines.
My guess is this is caused by some unwinding failures when reporting
heap allocations:
Ok, so we need to fix that if there is a bug.
$ grep -R 'allocated by thread' ./gcc/testsuite/c-c++-common/asan -l
./gcc/testsuite/c-c++-common/asan/strncpy-overflow-1.c
./gcc/testsuite/c-c++-common/asan/heap-overflow-1.c
./gcc/testsuite/c-c++-common/asan/use-after-free-1.c
This is what I see from the log and all failures look identical.
==14627==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x41a007fa at pc 0x88c4 bp 0xbebd0084 sp 0xbebd007c
READ of size 1 at 0x41a007fa thread T0
#0 0x88c3 in main
/work/gcc/gcc/testsuite/c-c++-common/asan/heap-overflow-1.c:21
#1 0x40626631 in __libc_start_main
(/lib/arm-linux-gnueabihf/libc.so.6+0x17631)
0x41a007fa is located 0 bytes to the right of 10-byte region
[0x41a007f0,0x41a007fa)
allocated by thread T0 here:
#0 0x400cd587 in __interceptor_malloc
/work/gcc/libsanitizer/asan/asan_malloc_linux.cc:73
SUMMARY: AddressSanitizer: heap-buffer-overflow
/work/gcc/gcc/testsuite/c-c++-common/asan/heap-overflow-1.c:21 main
Shadow bytes around the buggy address:
0x283400a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x283400b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x283400c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x283400d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x283400e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x283400f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa 00[02]
0x28340100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x28340110: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x28340120: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x28340130: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x28340140: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
ASan internal: fe
==14627==ABORTING
-Y
