{
/* Allocate some anonymous memory. If possible use the cache. */
size_t guardsize;
+ size_t reported_guardsize;
size_t reqsize;
void *mem;
const int prot = (PROT_READ | PROT_WRITE
assert (size != 0);
/* Make sure the size of the stack is enough for the guard and
- eventually the thread descriptor. */
+ eventually the thread descriptor. On some targets there is
+ a minimum guard size requirement, ARCH_MIN_GUARD_SIZE, so
+ internally enforce it (unless the guard was disabled), but
+ report the original guard size for backward compatibility:
+ before POSIX 2008 the guardsize was specified to be one page
+ by default which is observable via pthread_attr_getguardsize
+ and pthread_getattr_np. */
guardsize = (attr->guardsize + pagesize_m1) & ~pagesize_m1;
+ reported_guardsize = guardsize;
+ if (guardsize > 0 && guardsize < ARCH_MIN_GUARD_SIZE)
+ guardsize = ARCH_MIN_GUARD_SIZE;
if (guardsize < attr->guardsize || size + guardsize < guardsize)
/* Arithmetic overflow. */
return EINVAL;
/* The pthread_getattr_np() calls need to get passed the size
requested in the attribute, regardless of how large the
actually used guardsize is. */
- pd->reported_guardsize = guardsize;
+ pd->reported_guardsize = reported_guardsize;
}
/* Initialize the lock. We have to do this unconditionally since the
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE (64 * 1024)
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (4 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. The ABI requires 16. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 4
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. SSE requires 16
bytes. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 8
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (8 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 64
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. SSE requires 16
bytes. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (32 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* IA-64 uses a normal stack and a register stack. */
#define NEED_SEPARATE_REGISTER_STACK
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 4
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (4 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. The ABI requires 16
bytes (for both 32-bit and 64-bit PowerPC). */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. SSE requires 16
bytes. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 8
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (4 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. */
#define STACK_ALIGN 16
/* Default stack size. */
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+/* Minimum guard size. */
+#define ARCH_MIN_GUARD_SIZE 0
+
/* Required stack pointer alignment at beginning. SSE requires 16
bytes. */
#define STACK_ALIGN 16