gcc/testsuite/gcc.dg/stack-check-6.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fstack-clash-protection -fdump-rtl-pro_and_epilogue -fno-optimize-sibling-calls --param stack-clash-protection-probe-interval=12 --param stack-clash-protection-guard-size=12" } */
   3 /* { dg-require-effective-target supports_stack_clash_protection } */
   4 /* { dg-skip-if "" { *-*-* } { "-fstack-protector" } { "" } } */
   5
   6
   7 extern void foo (char *);
   8 extern void bar (void);
   9
  10
  11 /* This is a leaf with a frame that is large enough to require probing with
  12    a residual allocation, but small enough to probe inline.  */
  13 void
  14 f4 (void)
  15 {
  16   char buf[4096 + 512];
  17   asm volatile ("" : : "g" (&buf) : "memory");
  18 }
  19
  20
  21 /* This is a non-leaf with a frame large enough to require probing and
  22    a residual allocation, but small enough to probe inline.  */
  23 void
  24 f5 (void)
  25 {
  26   char buf[4096 + 512];
  27   foo (buf);
  28 }
  29
  30 /* This is a leaf with a frame that is large enough to require probing with
  31    a loop plus a residual allocation.  */
  32 void
  33 f6 (void)
  34 {
  35   char buf[4096 * 10 + 512];
  36   asm volatile ("" : : "g" (&buf) : "memory");
  37 }
  38
  39
  40 /* This is a non-leaf with a frame large enough to require probing with
  41    a loop plus a residual allocation.  */
  42 void
  43 f7 (void)
  44 {
  45   char buf[4096 * 10 + 512];
  46   foo (buf);
  47 }
  48
  49 /* { dg-final { scan-rtl-dump-times "Stack clash inline probes" 2 "pro_and_epilogue" } } */
  50 /* { dg-final { scan-rtl-dump-times "Stack clash probe loop" 2 "pro_and_epilogue" } } */
  51 /* { dg-final { scan-rtl-dump-times "Stack clash residual allocation in prologue" 4 "pro_and_epilogue" } } */
  52 /* { dg-final { scan-rtl-dump-times "Stack clash not noreturn" 4 "pro_and_epilogue" } } */
  53
  54 /* { dg-final { scan-rtl-dump-times "Stack clash no frame pointer needed" 4 "pro_and_epilogue" { target { ! frame_pointer_for_non_leaf } } } } */
  55 /* { dg-final { scan-rtl-dump-times "Stack clash no frame pointer needed" 2 "pro_and_epilogue" { target { frame_pointer_for_non_leaf } } } } */
  56 /* { dg-final { scan-rtl-dump-times "Stack clash frame pointer needed" 2 "pro_and_epilogue" { target { frame_pointer_for_non_leaf } } } } */