diff options
Diffstat (limited to 'lib/safestack')
| -rw-r--r-- | lib/safestack/safestack.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/safestack/safestack.cc b/lib/safestack/safestack.cc index 5254462d9..92c24b35d 100644 --- a/lib/safestack/safestack.cc +++ b/lib/safestack/safestack.cc @@ -18,6 +18,7 @@ #include <pthread.h> #include <stddef.h> #include <stdint.h> +#include <unistd.h> #include <sys/resource.h> #include <sys/types.h> #include <sys/user.h> @@ -68,6 +69,9 @@ const unsigned kStackAlign = 16; /// size rlimit is set to infinity. const unsigned kDefaultUnsafeStackSize = 0x2800000; +/// Runtime page size obtained through sysconf +static unsigned pageSize; + // TODO: To make accessing the unsafe stack pointer faster, we plan to // eventually store it directly in the thread control block data structure on // platforms where this structure is pointed to by %fs or %gs. This is exactly @@ -185,7 +189,7 @@ INTERCEPTOR(int, pthread_create, pthread_t *thread, CHECK_NE(size, 0); CHECK_EQ((size & (kStackAlign - 1)), 0); - CHECK_EQ((guard & (PAGE_SIZE - 1)), 0); + CHECK_EQ((guard & (pageSize - 1)), 0); void *addr = unsafe_stack_alloc(size, guard); struct tinfo *tinfo = @@ -217,6 +221,7 @@ void __safestack_init() { void *addr = unsafe_stack_alloc(size, guard); unsafe_stack_setup(addr, size, guard); + pageSize = sysconf(_SC_PAGESIZE); // Initialize pthread interceptors for thread allocation INTERCEPT_FUNCTION(pthread_create); |