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8184271: Time related C1 intrinsics produce inconsistent results when floating around

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C1 intrinsics for System.nanoTime(), System.currentTimeMillis() and JVM.counterTime() should be pinned.

Reviewed-by: kvn, vlivanov
This commit is contained in:
Tobias Hartmann 2017-07-14 11:55:58 +02:00
parent 0a8e98f6c4
commit 9098aa9a2e
4 changed files with 85 additions and 1 deletions
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15
hotspot/src/share/vm/classfile/vmSymbols.cpp
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@ -399,6 +399,21 @@ bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
}
}
// Some intrinsics produce different results if they are not pinned
bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) {
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
switch(id) {
#ifdef TRACE_HAVE_INTRINSICS
case vmIntrinsics::_counterTime:
#endif
case vmIntrinsics::_currentTimeMillis:
case vmIntrinsics::_nanoTime:
return true;
default:
return false;
}
}
bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) {
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
switch(id) {