[Bug sanitizer/65479] New: sanitizer stack trace missing frames past #0 on powerpc64

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65479

            Bug ID: 65479
           Summary: sanitizer stack trace missing frames past #0 on
                    powerpc64
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: msebor 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

On both powerpc64 and powerpc64le, the c-c++-common/asan/misalign-1.c shows 6
failures, all in the output pattern test.  The failures are due to to the stack
trace missing stack frame #1 (it only includes frame #0).  It looks like the
backtrace on powerpc doesn't work correctly.

=================================================================
==87868==ERROR: AddressSanitizer: unknown-crash on address 0x3fffc231eb2f at pc
0x000010000ce8 bp 0x3fffc231e9f0 sp 0x3fffc231ea10
READ of size 4 at 0x3fffc231eb2f thread T0
    #0 0x10000ce4 in foo
/src/gcc-5.0-git/gcc/testsuite/c-c++-common/asan/misalign-1.c:11

Address 0x3fffc231eb2f is located in stack of thread T0 at offset 175 in frame
    #0 0x1000086c in main
/src/gcc-5.0-git/gcc/testsuite/c-c++-common/asan/misalign-1.c:28

  This frame has 3 object(s):
    [32, 36) 'v'
    [96, 100) 'w'
    [160, 176) 't' <== Memory access at offset 175 partially overflows this
variable
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: unknown-crash
/src/gcc-5.0-git/gcc/testsuite/c-c++-common/asan/misalign-1.c:11 foo
Shadow bytes around the buggy address:
  0x09fff8463d10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463d20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463d30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463d40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463d50: f1 f1 f1 f1 04 f4 f4 f4 f2 f2 f2 f2 04 f4 f4 f4
=>0x09fff8463d60: f2 f2 f2 f2 00[00]f4 f4 f3 f3 f3 f3 00 00 00 00
  0x09fff8463d70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463d90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463da0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x09fff8463db0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
==87868==ABORTING