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8140348: Convert TraceSafepoint to Unified Logging

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The former -XX:+TraceSafepoint flag is updated to the unified logging framework and is now replaced with -Xlog:safepoint in product mode.

Reviewed-by: coleenp, hseigel
This commit is contained in:
Rachel Protacio 2015-11-04 14:32:51 -05:00
parent 9adaaa0c96
commit e54bd838f9
7 changed files with 142 additions and 29 deletions
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6
hotspot/src/share/vm/runtime/os.cpp
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@ -32,6 +32,7 @@
#include "code/vtableStubs.hpp"
#include "gc/shared/vmGCOperations.hpp"
#include "interpreter/interpreter.hpp"
#include "logging/log.hpp"
#include "memory/allocation.inline.hpp"
#ifdef ASSERT
#include "memory/guardedMemory.hpp"
@ -1363,9 +1364,8 @@ static volatile intptr_t SerializePageLock = 0;
// thread tries to store to the "read-only" memory serialize page during state
// transition.
void os::block_on_serialize_page_trap() {
if (TraceSafepoint) {
tty->print_cr("Block until the serialize page permission restored");
}
log_debug(safepoint)("Block until the serialize page permission restored");
// When VMThread is holding the SerializePageLock during modifying the
// access permission of the memory serialize page, the following call
// will block until the permission of that page is restored to rw.