[Bug sanitizer/63850] New: Building TSAN for Aarch64 results in assembler

["venkataramanan.kumar at amd dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63850

            Bug ID: 63850
           Summary: Building TSAN for Aarch64 results in assembler
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: venkataramanan.kumar at amd dot com
                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

After enabling TSAN for Aarch64, building it results in Assembler errors.

tmp/cc02YOZf.s:22856: Error: unknown mnemonic `call' -- `call
__tsan_trace_switch_thunk'
/tmp/cc02YOZf.s:22856: Error: operand 1 should be an integer or stack
pointer register -- `add $1024,%rsp'
/tmp/cc02YOZf.s:23297: Error: operand 1 should be an integer or stack
pointer register -- `sub $1024,%rsp'


The function "TraceAddEvent" adds "HACKY_CALL" which is defined for X86_64.

void ALWAYS_INLINE TraceAddEvent(ThreadState *thr, FastState fs,
                                        EventType typ, u64 addr) {
  if (!kCollectHistory)
    return;
  DCHECK_GE((int)typ, 0);
  DCHECK_LE((int)typ, 7);
  DCHECK_EQ(GetLsb(addr, 61), addr);
  StatInc(thr, StatEvents);
  u64 pos = fs.GetTracePos();
  if (UNLIKELY((pos % kTracePartSize) == 0)) {
#ifndef TSAN_GO
    HACKY_CALL(__tsan_trace_switch);
#else
    TraceSwitch(thr);
#endif
  }
  Event *trace = (Event*)GetThreadTrace(fs.tid());
  Event *evp = &trace[pos];
  Event ev = (u64)addr | ((u64)typ << 61);
  *evp = ev;
}

}  // namespace __tsan


#if TSAN_DEBUG == 0
// The caller may not create the stack frame for itself at all,
// so we create a reserve stack frame for it (1024b must be enough).
#define HACKY_CALL(f) \
  __asm__ __volatile__("sub $1024, %%rsp;" \
                       CFI_INL_ADJUST_CFA_OFFSET(1024) \
                       ".hidden " #f "_thunk;" \
                       "call " #f "_thunk;" \
                       "add $1024, %%rsp;" \
                       CFI_INL_ADJUST_CFA_OFFSET(-1024) \
                       ::: "memory", "cc");
#else
#define HACKY_CALL(f) f()
#endif

Making #if 0 & TSAN_DEBUG == 0 also results in Assembler errors. TSAN make
system includes x86_64 assembly file.

I am looking at ways to fix it and functionally build TSAN for Aarch64