Index: gcc/testsuite/lib/target-supports.exp =================================================================== --- gcc/testsuite/lib/target-supports.exp (revision 164490) +++ gcc/testsuite/lib/target-supports.exp (working copy) @@ -3664,6 +3664,15 @@ proc check_effective_target_lto { } { return [info exists ENABLE_LTO] } +# Return 1 if this target supports the -fsplit-stack option, 0 +# otherwise. + +proc check_effective_target_split_stack {} { + return [check_no_compiler_messages split_stack object { + void foo (void) { } + } "-fsplit-stack"] +} + # Return 1 if the language for the compiler under test is C. proc check_effective_target_c { } { Index: gcc/testsuite/gcc.dg/split-1.c =================================================================== --- gcc/testsuite/gcc.dg/split-1.c (revision 0) +++ gcc/testsuite/gcc.dg/split-1.c (revision 0) @@ -0,0 +1,49 @@ +/* This test needs to use setrlimit to set the stack size, so it can + only run on Unix. */ +/* { dg-do run { target *-*-linux* *-*-solaris* *-*-darwin* } } */ +/* { dg-require-effective-target split_stack } */ +/* { dg-options "-fsplit-stack" } */ + +#include +#include +#include + +/* 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; +} Index: gcc/testsuite/gcc.dg/split-2.c =================================================================== --- gcc/testsuite/gcc.dg/split-2.c (revision 0) +++ gcc/testsuite/gcc.dg/split-2.c (revision 0) @@ -0,0 +1,55 @@ +/* { dg-do run } */ +/* { dg-require-effective-target split_stack } */ +/* { dg-require-effective-target pthread_h } */ +/* { dg-options "-pthread -fsplit-stack" } */ + +#include +#include + +/* 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); + } +} + +static void * +thread_routine (void *arg __attribute__ ((unused))) +{ + down (1000); + return NULL; +} + +int +main (void) +{ + int i; + pthread_t tid; + void *dummy; + + i = pthread_create (&tid, NULL, thread_routine, NULL); + if (i != 0) + abort (); + i = pthread_join (tid, &dummy); + if (i != 0) + abort (); + return 0; +} Index: gcc/testsuite/gcc.dg/split-3.c =================================================================== --- gcc/testsuite/gcc.dg/split-3.c (revision 0) +++ gcc/testsuite/gcc.dg/split-3.c (revision 0) @@ -0,0 +1,64 @@ +/* This test needs to use setrlimit to set the stack size, so it can + only run on Unix. */ +/* { dg-do run { target *-*-linux* *-*-solaris* *-*-darwin* } } */ +/* { dg-require-effective-target split_stack } */ +/* { dg-options "-fsplit-stack" } */ + +#include +#include +#include +#include + +/* 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]; + va_list ap; + + va_start (ap, i); + if (va_arg (ap, int) != 1 + || va_arg (ap, int) != 2 + || va_arg (ap, int) != 3 + || va_arg (ap, int) != 4 + || va_arg (ap, int) != 5 + || va_arg (ap, int) != 6 + || va_arg (ap, int) != 7 + || va_arg (ap, int) != 8 + || va_arg (ap, int) != 9 + || va_arg (ap, int) != 10) + abort (); + + if (i > 0) + { + use_buffer (buf); + down (i - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10); + } +} + +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, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10); + return 0; +} Index: gcc/testsuite/gcc.dg/split-4.c =================================================================== --- gcc/testsuite/gcc.dg/split-4.c (revision 0) +++ gcc/testsuite/gcc.dg/split-4.c (revision 0) @@ -0,0 +1,68 @@ +/* This test needs to use setrlimit to set the stack size, so it can + only run on Unix. */ +/* { dg-do run { target *-*-linux* *-*-solaris* *-*-darwin* } } */ +/* { dg-require-effective-target split_stack } */ +/* { dg-options "-fsplit-stack" } */ + +#include +#include +#include +#include + +/* Use a noinline function to ensure that the buffer is not removed + from the stack. */ +static void use_buffer (char *buf, size_t) __attribute__ ((noinline)); +static void +use_buffer (char *buf, size_t c) +{ + size_t i; + + for (i = 0; i < c; ++i) + buf[i] = (char) i; +} + +/* Each recursive call uses 10 * i bytes. We call it 1000 times, + using a total of 5,000,000 bytes. If -fsplit-stack is not working, + that will overflow our stack limit. */ + +static void +down1 (int i) +{ + char buf[10 * i]; + + if (i > 0) + { + use_buffer (buf, 10 * i); + down1 (i - 1); + } +} + +/* Same thing, using alloca. */ + +static void +down2 (int i) +{ + char *buf = alloca (10 * i); + + if (i > 0) + { + use_buffer (buf, 10 * i); + down2 (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 (); + down1 (1000); + down2 (1000); + return 0; +}