Mercurial > hg > graal-jvmci-8

diff src/os/solaris/vm/os_solaris.cpp @ 894:665be97e8704

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6863420: os::javaTimeNanos() go backward on Solaris x86 Summary: Use new atomic long load method Atomic::load() to load max_hrtime. Reviewed-by: never, ysr, johnc, phh, dcubed, acorn
author kvn
date Sun, 26 Jul 2009 16:40:14 -0700
parents 956304450e80
children 95e9083cf4a7
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line diff
--- a/src/os/solaris/vm/os_solaris.cpp	Sun Jul 26 12:59:41 2009 -0700
+++ b/src/os/solaris/vm/os_solaris.cpp	Sun Jul 26 16:40:14 2009 -0700
@@ -1643,7 +1643,8 @@
 inline hrtime_t getTimeNanos() {
   if (VM_Version::supports_cx8()) {
     const hrtime_t now = gethrtime();
-    const hrtime_t prev = max_hrtime;
+    // Use atomic long load since 32-bit x86 uses 2 registers to keep long.
+    const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime);
     if (now <= prev)  return prev;   // same or retrograde time;
     const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
     assert(obsv >= prev, "invariant");   // Monotonicity