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comparison src/share/vm/prims/jvm.cpp @ 1324:e392695de029

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6935224: Adding new DTrace probes to work with Palantir Summary: Adding probes related to thread scheduling and class initialization Reviewed-by: kamg, never
author fparain
date Wed, 17 Mar 2010 11:01:05 +0100
parents 9b9c1ee9b3f6
children c18cbe5936b8
comparison
equal deleted inserted replaced
1323:cd20a6f46fec 1324:e392695de029
23 */ 23 */
24 24
25 #include "incls/_precompiled.incl" 25 #include "incls/_precompiled.incl"
26 #include "incls/_jvm.cpp.incl" 26 #include "incls/_jvm.cpp.incl"
27 #include <errno.h> 27 #include <errno.h>
28
29 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
30 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
31 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
28 32
29 /* 33 /*
30 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 34 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
31 such ctors and calls MUST NOT come between an oop declaration/init and its 35 such ctors and calls MUST NOT come between an oop declaration/init and its
32 usage because if objects are move this may cause various memory stomps, bus 36 usage because if objects are move this may cause various memory stomps, bus
2760 2764
2761 2765
2762 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2766 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2763 JVMWrapper("JVM_Yield"); 2767 JVMWrapper("JVM_Yield");
2764 if (os::dont_yield()) return; 2768 if (os::dont_yield()) return;
2769 HS_DTRACE_PROBE0(hotspot, thread__yield);
2765 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2770 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2766 // Critical for similar threading behaviour 2771 // Critical for similar threading behaviour
2767 if (ConvertYieldToSleep) { 2772 if (ConvertYieldToSleep) {
2768 os::sleep(thread, MinSleepInterval, false); 2773 os::sleep(thread, MinSleepInterval, false);
2769 } else { 2774 } else {
2784 } 2789 }
2785 2790
2786 // Save current thread state and restore it at the end of this block. 2791 // Save current thread state and restore it at the end of this block.
2787 // And set new thread state to SLEEPING. 2792 // And set new thread state to SLEEPING.
2788 JavaThreadSleepState jtss(thread); 2793 JavaThreadSleepState jtss(thread);
2794
2795 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2789 2796
2790 if (millis == 0) { 2797 if (millis == 0) {
2791 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2798 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2792 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2799 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2793 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2800 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2805 thread->osthread()->set_state(SLEEPING); 2812 thread->osthread()->set_state(SLEEPING);
2806 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2813 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2807 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2814 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2808 // us while we were sleeping. We do not overwrite those. 2815 // us while we were sleeping. We do not overwrite those.
2809 if (!HAS_PENDING_EXCEPTION) { 2816 if (!HAS_PENDING_EXCEPTION) {
2817 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2810 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2818 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2811 // to properly restore the thread state. That's likely wrong. 2819 // to properly restore the thread state. That's likely wrong.
2812 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2820 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2813 } 2821 }
2814 } 2822 }
2815 thread->osthread()->set_state(old_state); 2823 thread->osthread()->set_state(old_state);
2816 } 2824 }
2825 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2817 JVM_END 2826 JVM_END
2818 2827
2819 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2828 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2820 JVMWrapper("JVM_CurrentThread"); 2829 JVMWrapper("JVM_CurrentThread");
2821 oop jthread = thread->threadObj(); 2830 oop jthread = thread->threadObj();