Libc-1158.30.7.tar.gz

[apple/libc.git] / os / assumes.h

diff --git a/os/assumes.h b/os/assumes.h
index 028b8287c8a81fa54d8754f13ca9e5d277dcf9b9..c120f4ec08f896bc8e17a4d703b71283ca0223c7 100644 (file)
--- a/os/assumes.h
+++ b/os/assumes.h
@@ -34,8 +34,31 @@ __BEGIN_DECLS
 #include <stdarg.h>
 #include <stdbool.h>
 #include <_simple.h>
-#include <os/base.h>
 #include <errno.h>
+#include <os/base_private.h>
+
+#if __GNUC__
+#define os_constant(x) __builtin_constant_p((x))
+#define os_hardware_trap() __asm__ __volatile__ (""); __builtin_trap()
+#define __OS_COMPILETIME_ASSERT__(e) __extension__({ \
+       char __compile_time_assert__[(e) ? 1 : -1];     \
+       (void)__compile_time_assert__; \
+})
+#else /* __GNUC__ */
+#define os_constant(x) ((long)0)
+#define os_hardware_trap() abort()
+#define __OS_COMPILETIME_ASSERT__(e) (e)
+#endif /* __GNUC__ */
+
+
+/* os_crash() is like os_hardware_trap(), except you get to pass in a crash
+ * message, and it can be redirected to a callback function using
+ * os_set_crash_callback() */
+#define os_crash(msg) \
+       ({               \
+               _os_crash(msg);                 \
+               os_hardware_trap();             \
+       })
 
 /* This is useful for clients who wish for the messages generated by assumes()
  * failures to go somewhere other than (or in addition to) the system log. If
@@ -58,18 +81,30 @@ struct _os_redirect_assumes_s {
                .redirect = &func, \
        };
 
+
+typedef void (*os_crash_callback_t) (const char *);
+
+/* private.  use os_get_crash_callback and os_set_crash_callback */
+extern os_crash_callback_t _os_crash_callback;
+
+static inline os_crash_callback_t
+os_get_crash_callback() {
+       return _os_crash_callback;
+}
+
+static inline void
+os_set_crash_callback(os_crash_callback_t callback) {
+       _os_crash_callback = callback;
+}
+
 /* The asl_message argument is a _SIMPLE_STRING that, when given to _simple_asl_send(), will
  * direct the message to the MessageTracer diagnostic messages store rather than
  * the default system log store.
  */
 typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const char *);
 
-#if TARGET_OS_IPHONE
-#define os_set_crash_message(arg) /* no-op */
-#else
 #include <CrashReporterClient.h>
-#define os_set_crash_message(arg) _crc_make_setter(message, (arg))
-#endif
+#define os_set_crash_message(arg) CRSetCrashLogMessage(arg)
 
 #define os_assumes(e) __extension__({ \
        __typeof__(e) _e = os_fastpath(e); \
@@ -87,7 +122,7 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
        __typeof__(e) _e = os_slowpath(e); \
        if (_e) { \
                if (os_constant(e)) { \
-                       __OS_COMPILETIME_ASSERT__(!e); \
+                       __OS_COMPILETIME_ASSERT__(!(e)); \
                } \
                _os_assumes_log((uint64_t)(uintptr_t)_e); \
                _os_avoid_tail_call(); \
@@ -121,8 +156,7 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
                } \
 \
                char *_fail_message = _os_assert_log((uint64_t)(uintptr_t)_e); \
-               os_set_crash_message(_fail_message); \
-               os_hardware_trap(); \
+               os_crash(_fail_message);             \
                free(_fail_message); \
        } \
 })
@@ -131,12 +165,11 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
        __typeof__(e) _e = os_slowpath(e); \
        if (_e) { \
                if (os_constant(e)) { \
-                       __OS_COMPILETIME_ASSERT__(!e); \
+                       __OS_COMPILETIME_ASSERT__(!(e)); \
                } \
 \
                char *_fail_message = _os_assert_log((uint64_t)(uintptr_t)_e); \
-               os_set_crash_message(_fail_message); \
-               os_hardware_trap(); \
+               os_crash(_fail_message);             \
                free(_fail_message); \
        } \
 })
@@ -145,8 +178,7 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
        __typeof__(e) _e = os_slowpath(e); \
        if (_e == (__typeof__(e))-1) { \
                char *_fail_message = _os_assert_log((uint64_t)(uintptr_t)errno); \
-               os_set_crash_message(_fail_message); \
-               os_hardware_trap(); \
+               os_crash(_fail_message);             \
                free(_fail_message); \
        } \
 })
@@ -171,7 +203,7 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
        __typeof__(e) _e = os_slowpath(e); \
        if (_e) { \
                if (os_constant(e)) { \
-                       __OS_COMPILETIME_ASSERT__(!e); \
+                       __OS_COMPILETIME_ASSERT__(!(e)); \
                } \
                _os_assumes_log_ctx((f), (ctx), (uintptr_t)_e); \
                _os_avoid_tail_call(); \
@@ -194,10 +226,9 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
                if (os_constant(e)) { \
                        __OS_COMPILETIME_ASSERT__(e); \
                } \
-\
+                                                                       \
                char *_fail_message = _os_assert_log_ctx((f), (ctx), (uint64_t)(uintptr_t)_e); \
-               os_set_crash_message(_fail_message); \
-               os_hardware_trap(); \
+               os_crash(_fail_message);             \
                free(_fail_message); \
        } \
 })
@@ -206,12 +237,11 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
        __typeof__(e) _e = os_slowpath(e); \
        if (_e) { \
                if (os_constant(e)) { \
-                       __OS_COMPILETIME_ASSERT__(!e); \
+                       __OS_COMPILETIME_ASSERT__(!(e)); \
                } \
 \
                char *_fail_message = _os_assert_log_ctx((f), (ctx), (uint64_t)(uintptr_t)_e); \
-               os_set_crash_message(_fail_message); \
-               os_hardware_trap(); \
+               os_crash(_fail_message);             \
                free(_fail_message); \
        } \
 })
@@ -220,12 +250,15 @@ typedef bool (*os_log_callout_t)(_SIMPLE_STRING asl_message, void *ctx, const ch
        __typeof__(e) _e = os_slowpath(e); \
        if (_e == (__typeof__(e))-1) { \
                char *_fail_message = _os_assert_log_ctx((f), (ctx), (uint64_t)(uintptr_t)errno); \
-               os_set_crash_message(_fail_message); \
-               os_hardware_trap(); \
+               os_crash(_fail_message);             \
                free(_fail_message); \
        } \
 })
 
+__OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_9_0)
+extern void
+_os_crash(const char *);
+
 __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_6_0)
 extern void
 _os_assumes_log(uint64_t code);