[sanitizer][fuchsia] Avoid deprecated syscall.

The zx_clock_get syscall on Fuchsia is deprecated - ref
https://fuchsia.dev/fuchsia-src/reference/syscalls/clock_get
This changes to the recommended replacement; calling zx_clock_read on
the userspace UTC clock.

Reviewed By: mcgrathr, phosek

Differential Revision: https://reviews.llvm.org/D90169

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cpp
index a6034eb..80c1592 100644 (file)
--- a/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cpp
@@ -14,10 +14,6 @@
 #include "sanitizer_fuchsia.h"
 #if SANITIZER_FUCHSIA
 
-#include "sanitizer_common.h"
-#include "sanitizer_libc.h"
-#include "sanitizer_mutex.h"
-
 #include <limits.h>
 #include <pthread.h>
 #include <stdlib.h>
@@ -25,6 +21,11 @@
 #include <zircon/errors.h>
 #include <zircon/process.h>
 #include <zircon/syscalls.h>
+#include <zircon/utc.h>
+
+#include "sanitizer_common.h"
+#include "sanitizer_libc.h"
+#include "sanitizer_mutex.h"
 
 namespace __sanitizer {
 
@@ -47,8 +48,10 @@ unsigned int internal_sleep(unsigned int seconds) {
 }
 
 u64 NanoTime() {
+  zx_handle_t utc_clock = _zx_utc_reference_get();
+  CHECK_NE(utc_clock, ZX_HANDLE_INVALID);
   zx_time_t time;
-  zx_status_t status = _zx_clock_get(ZX_CLOCK_UTC, &time);
+  zx_status_t status = _zx_clock_read(utc_clock, &time);
   CHECK_EQ(status, ZX_OK);
   return time;
 }