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comparison src/share/vm/ci/ciEnv.cpp @ 780:c96bf21b756f

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6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits Summary: Cache Jvmti and DTrace flags used by Compiler. Reviewed-by: never
author kvn
date Fri, 08 May 2009 10:44:20 -0700
parents ad8c8ca4ab0f
children bd02caa94611
comparison
equal deleted inserted replaced
779:d0e0d6d824d8 780:c96bf21b756f
166 } 166 }
167 167
168 ciEnv::~ciEnv() { 168 ciEnv::~ciEnv() {
169 CompilerThread* current_thread = CompilerThread::current(); 169 CompilerThread* current_thread = CompilerThread::current();
170 current_thread->set_env(NULL); 170 current_thread->set_env(NULL);
171 }
172
173 // ------------------------------------------------------------------
174 // Cache Jvmti state
175 void ciEnv::cache_jvmti_state() {
176 VM_ENTRY_MARK;
177 // Get Jvmti capabilities under lock to get consistant values.
178 MutexLocker mu(JvmtiThreadState_lock);
179 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
180 _jvmti_can_examine_or_deopt_anywhere = JvmtiExport::can_examine_or_deopt_anywhere();
181 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
182 _jvmti_can_post_exceptions = JvmtiExport::can_post_exceptions();
183 }
184
185 // ------------------------------------------------------------------
186 // Cache DTrace flags
187 void ciEnv::cache_dtrace_flags() {
188 // Need lock?
189 _dtrace_extended_probes = ExtendedDTraceProbes;
190 if (_dtrace_extended_probes) {
191 _dtrace_monitor_probes = true;
192 _dtrace_method_probes = true;
193 _dtrace_alloc_probes = true;
194 } else {
195 _dtrace_monitor_probes = DTraceMonitorProbes;
196 _dtrace_method_probes = DTraceMethodProbes;
197 _dtrace_alloc_probes = DTraceAllocProbes;
198 }
171 } 199 }
172 200
173 // ------------------------------------------------------------------ 201 // ------------------------------------------------------------------
174 // helper for lazy exception creation 202 // helper for lazy exception creation
175 ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) { 203 ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) {
808 836
809 // Prevent SystemDictionary::add_to_hierarchy from running 837 // Prevent SystemDictionary::add_to_hierarchy from running
810 // and invalidating our dependencies until we install this method. 838 // and invalidating our dependencies until we install this method.
811 MutexLocker ml(Compile_lock); 839 MutexLocker ml(Compile_lock);
812 840
813 if (log() != NULL) { 841 // Change in Jvmti state may invalidate compilation.
814 // Log the dependencies which this compilation declares. 842 if (!failing() &&
815 dependencies()->log_all_dependencies(); 843 ( (!jvmti_can_hotswap_or_post_breakpoint() &&
816 } 844 JvmtiExport::can_hotswap_or_post_breakpoint()) ||
817 845 (!jvmti_can_examine_or_deopt_anywhere() &&
818 // Encode the dependencies now, so we can check them right away. 846 JvmtiExport::can_examine_or_deopt_anywhere()) ||
819 dependencies()->encode_content_bytes(); 847 (!jvmti_can_access_local_variables() &&
820 848 JvmtiExport::can_access_local_variables()) ||
821 // Check for {class loads, evolution, breakpoints} during compilation 849 (!jvmti_can_post_exceptions() &&
822 check_for_system_dictionary_modification(target); 850 JvmtiExport::can_post_exceptions()) )) {
851 record_failure("Jvmti state change invalidated dependencies");
852 }
853
854 // Change in DTrace flags may invalidate compilation.
855 if (!failing() &&
856 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
857 (!dtrace_method_probes() && DTraceMethodProbes) ||
858 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
859 record_failure("DTrace flags change invalidated dependencies");
860 }
861
862 if (!failing()) {
863 if (log() != NULL) {
864 // Log the dependencies which this compilation declares.
865 dependencies()->log_all_dependencies();
866 }
867
868 // Encode the dependencies now, so we can check them right away.
869 dependencies()->encode_content_bytes();
870
871 // Check for {class loads, evolution, breakpoints} during compilation
872 check_for_system_dictionary_modification(target);
873 }
823 874
824 methodHandle method(THREAD, target->get_methodOop()); 875 methodHandle method(THREAD, target->get_methodOop());
825 876
826 if (failing()) { 877 if (failing()) {
827 // While not a true deoptimization, it is a preemptive decompile. 878 // While not a true deoptimization, it is a preemptive decompile.