Mercurial > hg > CbC > CbC_gcc
diff gcc/testsuite/gcc.dg/pr85388-1.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/pr85388-1.c Thu Oct 25 07:37:49 2018 +0900 @@ -0,0 +1,50 @@ +/* This test needs to use setrlimit to set the stack size, so it can + only run on Unix. */ +/* { dg-do run { target { i?86-*-linux* i?86-*-gnu* x86_64-*-linux* } } } */ +/* { dg-require-effective-target cet } */ +/* { dg-require-effective-target split_stack } */ +/* { dg-options "-fsplit-stack -fcf-protection" } */ + +#include <stdlib.h> +#include <sys/types.h> +#include <sys/resource.h> + +/* Use a noinline function to ensure that the buffer is not removed + from the stack. */ +static void use_buffer (char *buf) __attribute__ ((noinline)); +static void +use_buffer (char *buf) +{ + buf[0] = '\0'; +} + +/* Each recursive call uses 10,000 bytes. We call it 1000 times, + using a total of 10,000,000 bytes. If -fsplit-stack is not + working, that will overflow our stack limit. */ + +static void +down (int i) +{ + char buf[10000]; + + if (i > 0) + { + use_buffer (buf); + down (i - 1); + } +} + +int +main (void) +{ + struct rlimit r; + + /* We set a stack limit because we are usually invoked via make, and + make sets the stack limit to be as large as possible. */ + r.rlim_cur = 8192 * 1024; + r.rlim_max = 8192 * 1024; + if (setrlimit (RLIMIT_STACK, &r) != 0) + abort (); + down (1000); + return 0; +}