61 #include "prims/jvmtiThreadState.hpp"
62 #include "prims/methodHandles.hpp"
63 #include "prims/vectorSupport.hpp"
64 #include "runtime/atomicAccess.hpp"
65 #include "runtime/basicLock.inline.hpp"
66 #include "runtime/continuation.hpp"
67 #include "runtime/continuationEntry.inline.hpp"
68 #include "runtime/deoptimization.hpp"
69 #include "runtime/escapeBarrier.hpp"
70 #include "runtime/fieldDescriptor.inline.hpp"
71 #include "runtime/frame.inline.hpp"
72 #include "runtime/handles.inline.hpp"
73 #include "runtime/interfaceSupport.inline.hpp"
74 #include "runtime/javaThread.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/keepStackGCProcessed.hpp"
77 #include "runtime/lightweightSynchronizer.hpp"
78 #include "runtime/lockStack.inline.hpp"
79 #include "runtime/objectMonitor.inline.hpp"
80 #include "runtime/osThread.hpp"
81 #include "runtime/safepointVerifiers.hpp"
82 #include "runtime/sharedRuntime.hpp"
83 #include "runtime/signature.hpp"
84 #include "runtime/stackFrameStream.inline.hpp"
85 #include "runtime/stackValue.hpp"
86 #include "runtime/stackWatermarkSet.hpp"
87 #include "runtime/stubRoutines.hpp"
88 #include "runtime/synchronizer.inline.hpp"
89 #include "runtime/threadSMR.hpp"
90 #include "runtime/threadWXSetters.inline.hpp"
91 #include "runtime/vframe.hpp"
92 #include "runtime/vframe_hp.hpp"
93 #include "runtime/vframeArray.hpp"
94 #include "runtime/vmOperations.hpp"
95 #include "utilities/checkedCast.hpp"
96 #include "utilities/events.hpp"
97 #include "utilities/growableArray.hpp"
98 #include "utilities/macros.hpp"
99 #include "utilities/preserveException.hpp"
100 #include "utilities/xmlstream.hpp"
101 #if INCLUDE_JFR
102 #include "jfr/jfr.inline.hpp"
103 #include "jfr/jfrEvents.hpp"
104 #include "jfr/metadata/jfrSerializer.hpp"
105 #endif
106
107 uint64_t DeoptimizationScope::_committed_deopt_gen = 0;
108 uint64_t DeoptimizationScope::_active_deopt_gen = 1;
109 bool DeoptimizationScope::_committing_in_progress = false;
110
111 DeoptimizationScope::DeoptimizationScope() : _required_gen(0) {
112 DEBUG_ONLY(_deopted = false;)
113
114 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
263 return checked_cast<int>(result);
264 }
265
266 void Deoptimization::UnrollBlock::print() {
267 ResourceMark rm;
268 stringStream st;
269 st.print_cr("UnrollBlock");
270 st.print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame);
271 st.print( " frame_sizes: ");
272 for (int index = 0; index < number_of_frames(); index++) {
273 st.print("%zd ", frame_sizes()[index]);
274 }
275 st.cr();
276 tty->print_raw(st.freeze());
277 }
278
279 // In order to make fetch_unroll_info work properly with escape
280 // analysis, the method was changed from JRT_LEAF to JRT_BLOCK_ENTRY.
281 // The actual reallocation of previously eliminated objects occurs in realloc_objects,
282 // which is called from the method fetch_unroll_info_helper below.
283 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* current, int exec_mode))
284 // fetch_unroll_info() is called at the beginning of the deoptimization
285 // handler. Note this fact before we start generating temporary frames
286 // that can confuse an asynchronous stack walker. This counter is
287 // decremented at the end of unpack_frames().
288 current->inc_in_deopt_handler();
289
290 if (exec_mode == Unpack_exception) {
291 // When we get here, a callee has thrown an exception into a deoptimized
292 // frame. That throw might have deferred stack watermark checking until
293 // after unwinding. So we deal with such deferred requests here.
294 StackWatermarkSet::after_unwind(current);
295 }
296
297 return fetch_unroll_info_helper(current, exec_mode);
298 JRT_END
299
300 #if COMPILER2_OR_JVMCI
301 // print information about reallocated objects
302 static void print_objects(JavaThread* deoptee_thread,
303 GrowableArray<ScopeValue*>* objects, bool realloc_failures) {
855 case Bytecodes::_athrow:
856 case Bytecodes::_areturn:
857 case Bytecodes::_dreturn:
858 case Bytecodes::_freturn:
859 case Bytecodes::_ireturn:
860 case Bytecodes::_lreturn:
861 case Bytecodes::_jsr:
862 case Bytecodes::_ret:
863 case Bytecodes::_return:
864 case Bytecodes::_lookupswitch:
865 case Bytecodes::_tableswitch:
866 return false;
867 default:
868 return true;
869 }
870 }
871 #endif
872 #endif
873
874 // Return BasicType of value being returned
875 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode))
876 assert(thread == JavaThread::current(), "pre-condition");
877
878 // We are already active in the special DeoptResourceMark any ResourceObj's we
879 // allocate will be freed at the end of the routine.
880
881 // JRT_LEAF methods don't normally allocate handles and there is a
882 // NoHandleMark to enforce that. It is actually safe to use Handles
883 // in a JRT_LEAF method, and sometimes desirable, but to do so we
884 // must use ResetNoHandleMark to bypass the NoHandleMark, and
885 // then use a HandleMark to ensure any Handles we do create are
886 // cleaned up in this scope.
887 ResetNoHandleMark rnhm;
888 HandleMark hm(thread);
889
890 frame stub_frame = thread->last_frame();
891
892 Continuation::notify_deopt(thread, stub_frame.sp());
893
894 // Since the frame to unpack is the top frame of this thread, the vframe_array_head
895 // must point to the vframeArray for the unpack frame.
1755 if (monitors != nullptr) {
1756 // Unlock in reverse order starting from most nested monitor.
1757 for (int j = (monitors->number_of_monitors() - 1); j >= 0; j--) {
1758 BasicObjectLock* src = monitors->at(j);
1759 if (src->obj() != nullptr) {
1760 ObjectSynchronizer::exit(src->obj(), src->lock(), thread);
1761 }
1762 }
1763 array->element(i)->free_monitors();
1764 #ifdef ASSERT
1765 array->element(i)->set_removed_monitors();
1766 #endif
1767 }
1768 }
1769 }
1770 #endif
1771
1772 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) {
1773 assert(fr.can_be_deoptimized(), "checking frame type");
1774
1775 gather_statistics(reason, Action_none, Bytecodes::_illegal);
1776
1777 if (LogCompilation && xtty != nullptr) {
1778 nmethod* nm = fr.cb()->as_nmethod_or_null();
1779 assert(nm != nullptr, "only compiled methods can deopt");
1780
1781 ttyLocker ttyl;
1782 xtty->begin_head("deoptimized thread='%zu' reason='%s' pc='" INTPTR_FORMAT "'",(uintx)thread->osthread()->thread_id(), trap_reason_name(reason), p2i(fr.pc()));
1783 nm->log_identity(xtty);
1784 xtty->end_head();
1785 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) {
1786 xtty->begin_elem("jvms bci='%d'", sd->bci());
1787 xtty->method(sd->method());
1788 xtty->end_elem();
1789 if (sd->is_top()) break;
1790 }
1791 xtty->tail("deoptimized");
1792 }
1793
1794 Continuation::notify_deopt(thread, fr.sp());
1795
1796 // Patch the compiled method so that when execution returns to it we will
1797 // deopt the execution state and return to the interpreter.
1798 fr.deoptimize(thread);
1799 }
1800
1996 event.set_compileId(nm->compile_id());
1997 event.set_compiler(nm->compiler_type());
1998 event.set_method(method);
1999 event.set_lineNumber(method->line_number_from_bci(trap_bci));
2000 event.set_bci(trap_bci);
2001 event.set_instruction(instruction);
2002 event.set_reason(reason);
2003 event.set_action(action);
2004 event.commit();
2005 }
2006 }
2007
2008 #endif // INCLUDE_JFR
2009
2010 static void log_deopt(nmethod* nm, Method* tm, intptr_t pc, frame& fr, int trap_bci,
2011 const char* reason_name, const char* reason_action) {
2012 LogTarget(Debug, deoptimization) lt;
2013 if (lt.is_enabled()) {
2014 LogStream ls(lt);
2015 bool is_osr = nm->is_osr_method();
2016 ls.print("cid=%4d %s level=%d",
2017 nm->compile_id(), (is_osr ? "osr" : " "), nm->comp_level());
2018 ls.print(" %s", tm->name_and_sig_as_C_string());
2019 ls.print(" trap_bci=%d ", trap_bci);
2020 if (is_osr) {
2021 ls.print("osr_bci=%d ", nm->osr_entry_bci());
2022 }
2023 ls.print("%s ", reason_name);
2024 ls.print("%s ", reason_action);
2025 ls.print_cr("pc=" INTPTR_FORMAT " relative_pc=" INTPTR_FORMAT,
2026 pc, fr.pc() - nm->code_begin());
2027 }
2028 }
2029
2030 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* current, jint trap_request)) {
2031 HandleMark hm(current);
2032
2033 // uncommon_trap() is called at the beginning of the uncommon trap
2034 // handler. Note this fact before we start generating temporary frames
2035 // that can confuse an asynchronous stack walker. This counter is
2036 // decremented at the end of unpack_frames().
2037
2038 current->inc_in_deopt_handler();
2039
2040 #if INCLUDE_JVMCI
2041 // JVMCI might need to get an exception from the stack, which in turn requires the register map to be valid
2042 RegisterMap reg_map(current,
2043 RegisterMap::UpdateMap::include,
2044 RegisterMap::ProcessFrames::include,
2045 RegisterMap::WalkContinuation::skip);
2046 #else
2047 RegisterMap reg_map(current,
2048 RegisterMap::UpdateMap::skip,
2049 RegisterMap::ProcessFrames::include,
2050 RegisterMap::WalkContinuation::skip);
2086 #if INCLUDE_JVMCI
2087 jlong speculation = current->pending_failed_speculation();
2088 if (nm->is_compiled_by_jvmci()) {
2089 nm->update_speculation(current);
2090 } else {
2091 assert(speculation == 0, "There should not be a speculation for methods compiled by non-JVMCI compilers");
2092 }
2093
2094 if (trap_bci == SynchronizationEntryBCI) {
2095 trap_bci = 0;
2096 current->set_pending_monitorenter(true);
2097 }
2098
2099 if (reason == Deoptimization::Reason_transfer_to_interpreter) {
2100 current->set_pending_transfer_to_interpreter(true);
2101 }
2102 #endif
2103
2104 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci);
2105 // Record this event in the histogram.
2106 gather_statistics(reason, action, trap_bc);
2107
2108 // Ensure that we can record deopt. history:
2109 bool create_if_missing = ProfileTraps;
2110
2111 methodHandle profiled_method;
2112 #if INCLUDE_JVMCI
2113 if (nm->is_compiled_by_jvmci()) {
2114 profiled_method = methodHandle(current, nm->method());
2115 } else {
2116 profiled_method = trap_method;
2117 }
2118 #else
2119 profiled_method = trap_method;
2120 #endif
2121
2122 MethodData* trap_mdo =
2123 get_method_data(current, profiled_method, create_if_missing);
2124
2125 { // Log Deoptimization event for JFR, UL and event system
2126 Method* tm = trap_method();
2127 const char* reason_name = trap_reason_name(reason);
2128 const char* reason_action = trap_action_name(action);
2129 intptr_t pc = p2i(fr.pc());
2130
2131 JFR_ONLY(post_deoptimization_event(nm, tm, trap_bci, trap_bc, reason, action);)
2132 log_deopt(nm, tm, pc, fr, trap_bci, reason_name, reason_action);
2133 Events::log_deopt_message(current, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d %s",
2134 reason_name, reason_action, pc,
2135 tm->name_and_sig_as_C_string(), trap_bci, nm->compiler_name());
2136 }
2137
2138 // Print a bunch of diagnostics, if requested.
2139 if (TraceDeoptimization || LogCompilation || is_receiver_constraint_failure) {
2140 ResourceMark rm;
2141
2142 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
2143 // We must do this already now, since we cannot acquire this lock while
2144 // holding the tty lock (lock ordering by rank).
2145 MutexLocker ml(trap_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
2146
2147 ttyLocker ttyl;
2148
2149 char buf[100];
2150 if (xtty != nullptr) {
2151 xtty->begin_head("uncommon_trap thread='%zu' %s",
2152 os::current_thread_id(),
2153 format_trap_request(buf, sizeof(buf), trap_request));
2154 #if INCLUDE_JVMCI
2155 if (speculation != 0) {
2186 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci);
2187 int dos = (pdata == nullptr)? 0: pdata->trap_state();
2188 if (dos != 0) {
2189 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos));
2190 if (trap_state_is_recompiled(dos)) {
2191 int recnt2 = trap_mdo->overflow_recompile_count();
2192 if (recnt2 != 0)
2193 xtty->print(" recompiles2='%d'", recnt2);
2194 }
2195 }
2196 }
2197 if (xtty != nullptr) {
2198 xtty->stamp();
2199 xtty->end_head();
2200 }
2201 if (TraceDeoptimization) { // make noise on the tty
2202 stringStream st;
2203 st.print("UNCOMMON TRAP method=%s", trap_scope->method()->name_and_sig_as_C_string());
2204 st.print(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=" INTPTR_FORMAT JVMCI_ONLY(", debug_id=%d"),
2205 trap_scope->bci(), p2i(fr.pc()), fr.pc() - nm->code_begin() JVMCI_ONLY(COMMA debug_id));
2206 st.print(" compiler=%s compile_id=%d", nm->compiler_name(), nm->compile_id());
2207 #if INCLUDE_JVMCI
2208 if (nm->is_compiled_by_jvmci()) {
2209 const char* installed_code_name = nm->jvmci_name();
2210 if (installed_code_name != nullptr) {
2211 st.print(" (JVMCI: installed code name=%s) ", installed_code_name);
2212 }
2213 }
2214 #endif
2215 st.print(" (@" INTPTR_FORMAT ") thread=%zu reason=%s action=%s unloaded_class_index=%d" JVMCI_ONLY(" debug_id=%d"),
2216 p2i(fr.pc()),
2217 os::current_thread_id(),
2218 trap_reason_name(reason),
2219 trap_action_name(action),
2220 unloaded_class_index
2221 #if INCLUDE_JVMCI
2222 , debug_id
2223 #endif
2224 );
2225 if (class_name != nullptr) {
2226 st.print(unresolved ? " unresolved class: " : " symbol: ");
2604 bool ignore_maybe_prior_recompile;
2605 assert(!reason_is_speculate(reason), "reason speculate only used by compiler");
2606 // JVMCI uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts
2607 bool update_total_counts = true JVMCI_ONLY( && !UseJVMCICompiler);
2608
2609 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
2610 MutexLocker ml(trap_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
2611
2612 query_update_method_data(trap_mdo, trap_bci,
2613 (DeoptReason)reason,
2614 update_total_counts,
2615 #if INCLUDE_JVMCI
2616 false,
2617 #endif
2618 nullptr,
2619 ignore_this_trap_count,
2620 ignore_maybe_prior_trap,
2621 ignore_maybe_prior_recompile);
2622 }
2623
2624 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* current, jint trap_request, jint exec_mode) {
2625 // Enable WXWrite: current function is called from methods compiled by C2 directly
2626 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
2627
2628 // Still in Java no safepoints
2629 {
2630 // This enters VM and may safepoint
2631 uncommon_trap_inner(current, trap_request);
2632 }
2633 HandleMark hm(current);
2634 return fetch_unroll_info_helper(current, exec_mode);
2635 }
2636
2637 // Local derived constants.
2638 // Further breakdown of DataLayout::trap_state, as promised by DataLayout.
2639 const int DS_REASON_MASK = ((uint)DataLayout::trap_mask) >> 1;
2640 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK;
2641
2642 //---------------------------trap_state_reason---------------------------------
2643 Deoptimization::DeoptReason
2644 Deoptimization::trap_state_reason(int trap_state) {
2645 // This assert provides the link between the width of DataLayout::trap_bits
2646 // and the encoding of "recorded" reasons. It ensures there are enough
2647 // bits to store all needed reasons in the per-BCI MDO profile.
2648 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits");
2649 int recompile_bit = (trap_state & DS_RECOMPILE_BIT);
2650 trap_state -= recompile_bit;
2651 if (trap_state == DS_REASON_MASK) {
2652 return Reason_many;
2653 } else {
2654 assert((int)Reason_none == 0, "state=0 => Reason_none");
2655 return (DeoptReason)trap_state;
2805 size_t len;
2806 if (unloaded_class_index < 0) {
2807 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" JVMCI_ONLY(" debug_id='%d'"),
2808 reason, action
2809 #if INCLUDE_JVMCI
2810 ,debug_id
2811 #endif
2812 );
2813 } else {
2814 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" JVMCI_ONLY(" debug_id='%d'"),
2815 reason, action, unloaded_class_index
2816 #if INCLUDE_JVMCI
2817 ,debug_id
2818 #endif
2819 );
2820 }
2821 return buf;
2822 }
2823
2824 juint Deoptimization::_deoptimization_hist
2825 [Deoptimization::Reason_LIMIT]
2826 [1 + Deoptimization::Action_LIMIT]
2827 [Deoptimization::BC_CASE_LIMIT]
2828 = {0};
2829
2830 enum {
2831 LSB_BITS = 8,
2832 LSB_MASK = right_n_bits(LSB_BITS)
2833 };
2834
2835 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action,
2836 Bytecodes::Code bc) {
2837 assert(reason >= 0 && reason < Reason_LIMIT, "oob");
2838 assert(action >= 0 && action < Action_LIMIT, "oob");
2839 _deoptimization_hist[Reason_none][0][0] += 1; // total
2840 _deoptimization_hist[reason][0][0] += 1; // per-reason total
2841 juint* cases = _deoptimization_hist[reason][1+action];
2842 juint* bc_counter_addr = nullptr;
2843 juint bc_counter = 0;
2844 // Look for an unused counter, or an exact match to this BC.
2845 if (bc != Bytecodes::_illegal) {
2846 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
2847 juint* counter_addr = &cases[bc_case];
2848 juint counter = *counter_addr;
2849 if ((counter == 0 && bc_counter_addr == nullptr)
2850 || (Bytecodes::Code)(counter & LSB_MASK) == bc) {
2851 // this counter is either free or is already devoted to this BC
2852 bc_counter_addr = counter_addr;
2853 bc_counter = counter | bc;
2854 }
2855 }
2856 }
2857 if (bc_counter_addr == nullptr) {
2858 // Overflow, or no given bytecode.
2859 bc_counter_addr = &cases[BC_CASE_LIMIT-1];
2860 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB
2861 }
2862 *bc_counter_addr = bc_counter + (1 << LSB_BITS);
2863 }
2864
2865 jint Deoptimization::total_deoptimization_count() {
2866 return _deoptimization_hist[Reason_none][0][0];
2867 }
2868
2869 // Get the deopt count for a specific reason and a specific action. If either
2870 // one of 'reason' or 'action' is null, the method returns the sum of all
2871 // deoptimizations with the specific 'action' or 'reason' respectively.
2872 // If both arguments are null, the method returns the total deopt count.
2873 jint Deoptimization::deoptimization_count(const char *reason_str, const char *action_str) {
2874 if (reason_str == nullptr && action_str == nullptr) {
2875 return total_deoptimization_count();
2876 }
2877 juint counter = 0;
2878 for (int reason = 0; reason < Reason_LIMIT; reason++) {
2879 if (reason_str == nullptr || !strcmp(reason_str, trap_reason_name(reason))) {
2880 for (int action = 0; action < Action_LIMIT; action++) {
2881 if (action_str == nullptr || !strcmp(action_str, trap_action_name(action))) {
2882 juint* cases = _deoptimization_hist[reason][1+action];
2883 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
2884 counter += cases[bc_case] >> LSB_BITS;
2885 }
2886 }
2887 }
2888 }
2889 }
2890 return counter;
2891 }
2892
2893 void Deoptimization::print_statistics() {
2894 juint total = total_deoptimization_count();
2895 juint account = total;
2896 if (total != 0) {
2897 ttyLocker ttyl;
2898 if (xtty != nullptr) xtty->head("statistics type='deoptimization'");
2899 tty->print_cr("Deoptimization traps recorded:");
2900 #define PRINT_STAT_LINE(name, r) \
2901 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name);
2902 PRINT_STAT_LINE("total", total);
2903 // For each non-zero entry in the histogram, print the reason,
2904 // the action, and (if specifically known) the type of bytecode.
2905 for (int reason = 0; reason < Reason_LIMIT; reason++) {
2906 for (int action = 0; action < Action_LIMIT; action++) {
2907 juint* cases = _deoptimization_hist[reason][1+action];
2908 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
2909 juint counter = cases[bc_case];
2910 if (counter != 0) {
2911 char name[1*K];
2912 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK);
2913 os::snprintf_checked(name, sizeof(name), "%s/%s/%s",
2914 trap_reason_name(reason),
2915 trap_action_name(action),
2916 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other");
2917 juint r = counter >> LSB_BITS;
2918 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total);
2919 account -= r;
2920 }
2921 }
2922 }
2923 }
2924 if (account != 0) {
2925 PRINT_STAT_LINE("unaccounted", account);
2926 }
2927 #undef PRINT_STAT_LINE
2928 if (xtty != nullptr) xtty->tail("statistics");
2929 }
2930 }
2931
2932 #else // COMPILER2_OR_JVMCI
2933
2934
2935 // Stubs for C1 only system.
2936 bool Deoptimization::trap_state_is_recompiled(int trap_state) {
2937 return false;
2938 }
2939
2940 const char* Deoptimization::trap_reason_name(int reason) {
2941 return "unknown";
2942 }
2943
2944 jint Deoptimization::total_deoptimization_count() {
2945 return 0;
2946 }
2947
2948 jint Deoptimization::deoptimization_count(const char *reason_str, const char *action_str) {
2949 return 0;
2950 }
2951
2952 void Deoptimization::print_statistics() {
2953 // no output
2954 }
2955
2956 void
2957 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) {
2958 // no update
2959 }
2960
2961 int Deoptimization::trap_state_has_reason(int trap_state, int reason) {
2962 return 0;
2963 }
2964
2965 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action,
2966 Bytecodes::Code bc) {
2967 // no update
2968 }
2969
2970 const char* Deoptimization::format_trap_state(char* buf, size_t buflen,
2971 int trap_state) {
2972 jio_snprintf(buf, buflen, "#%d", trap_state);
2973 return buf;
2974 }
2975
2976 #endif // COMPILER2_OR_JVMCI
|
61 #include "prims/jvmtiThreadState.hpp"
62 #include "prims/methodHandles.hpp"
63 #include "prims/vectorSupport.hpp"
64 #include "runtime/atomicAccess.hpp"
65 #include "runtime/basicLock.inline.hpp"
66 #include "runtime/continuation.hpp"
67 #include "runtime/continuationEntry.inline.hpp"
68 #include "runtime/deoptimization.hpp"
69 #include "runtime/escapeBarrier.hpp"
70 #include "runtime/fieldDescriptor.inline.hpp"
71 #include "runtime/frame.inline.hpp"
72 #include "runtime/handles.inline.hpp"
73 #include "runtime/interfaceSupport.inline.hpp"
74 #include "runtime/javaThread.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/keepStackGCProcessed.hpp"
77 #include "runtime/lightweightSynchronizer.hpp"
78 #include "runtime/lockStack.inline.hpp"
79 #include "runtime/objectMonitor.inline.hpp"
80 #include "runtime/osThread.hpp"
81 #include "runtime/perfData.inline.hpp"
82 #include "runtime/safepointVerifiers.hpp"
83 #include "runtime/sharedRuntime.hpp"
84 #include "runtime/signature.hpp"
85 #include "runtime/stackFrameStream.inline.hpp"
86 #include "runtime/stackValue.hpp"
87 #include "runtime/stackWatermarkSet.hpp"
88 #include "runtime/stubRoutines.hpp"
89 #include "runtime/synchronizer.inline.hpp"
90 #include "runtime/threadSMR.hpp"
91 #include "runtime/threadWXSetters.inline.hpp"
92 #include "runtime/vframe.hpp"
93 #include "runtime/vframe_hp.hpp"
94 #include "runtime/vframeArray.hpp"
95 #include "runtime/vmOperations.hpp"
96 #include "services/management.hpp"
97 #include "utilities/checkedCast.hpp"
98 #include "utilities/events.hpp"
99 #include "utilities/growableArray.hpp"
100 #include "utilities/macros.hpp"
101 #include "utilities/preserveException.hpp"
102 #include "utilities/xmlstream.hpp"
103 #if INCLUDE_JFR
104 #include "jfr/jfr.inline.hpp"
105 #include "jfr/jfrEvents.hpp"
106 #include "jfr/metadata/jfrSerializer.hpp"
107 #endif
108
109 uint64_t DeoptimizationScope::_committed_deopt_gen = 0;
110 uint64_t DeoptimizationScope::_active_deopt_gen = 1;
111 bool DeoptimizationScope::_committing_in_progress = false;
112
113 DeoptimizationScope::DeoptimizationScope() : _required_gen(0) {
114 DEBUG_ONLY(_deopted = false;)
115
116 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
265 return checked_cast<int>(result);
266 }
267
268 void Deoptimization::UnrollBlock::print() {
269 ResourceMark rm;
270 stringStream st;
271 st.print_cr("UnrollBlock");
272 st.print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame);
273 st.print( " frame_sizes: ");
274 for (int index = 0; index < number_of_frames(); index++) {
275 st.print("%zd ", frame_sizes()[index]);
276 }
277 st.cr();
278 tty->print_raw(st.freeze());
279 }
280
281 // In order to make fetch_unroll_info work properly with escape
282 // analysis, the method was changed from JRT_LEAF to JRT_BLOCK_ENTRY.
283 // The actual reallocation of previously eliminated objects occurs in realloc_objects,
284 // which is called from the method fetch_unroll_info_helper below.
285 JRT_BLOCK_ENTRY_PROF(Deoptimization::UnrollBlock*, Deoptimization, fetch_unroll_info, Deoptimization::fetch_unroll_info(JavaThread* current, int exec_mode))
286 // fetch_unroll_info() is called at the beginning of the deoptimization
287 // handler. Note this fact before we start generating temporary frames
288 // that can confuse an asynchronous stack walker. This counter is
289 // decremented at the end of unpack_frames().
290 current->inc_in_deopt_handler();
291
292 if (exec_mode == Unpack_exception) {
293 // When we get here, a callee has thrown an exception into a deoptimized
294 // frame. That throw might have deferred stack watermark checking until
295 // after unwinding. So we deal with such deferred requests here.
296 StackWatermarkSet::after_unwind(current);
297 }
298
299 return fetch_unroll_info_helper(current, exec_mode);
300 JRT_END
301
302 #if COMPILER2_OR_JVMCI
303 // print information about reallocated objects
304 static void print_objects(JavaThread* deoptee_thread,
305 GrowableArray<ScopeValue*>* objects, bool realloc_failures) {
857 case Bytecodes::_athrow:
858 case Bytecodes::_areturn:
859 case Bytecodes::_dreturn:
860 case Bytecodes::_freturn:
861 case Bytecodes::_ireturn:
862 case Bytecodes::_lreturn:
863 case Bytecodes::_jsr:
864 case Bytecodes::_ret:
865 case Bytecodes::_return:
866 case Bytecodes::_lookupswitch:
867 case Bytecodes::_tableswitch:
868 return false;
869 default:
870 return true;
871 }
872 }
873 #endif
874 #endif
875
876 // Return BasicType of value being returned
877 JRT_LEAF_PROF_NO_THREAD(BasicType, Deoptimization, unpack_frames, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode))
878 assert(thread == JavaThread::current(), "pre-condition");
879
880 // We are already active in the special DeoptResourceMark any ResourceObj's we
881 // allocate will be freed at the end of the routine.
882
883 // JRT_LEAF methods don't normally allocate handles and there is a
884 // NoHandleMark to enforce that. It is actually safe to use Handles
885 // in a JRT_LEAF method, and sometimes desirable, but to do so we
886 // must use ResetNoHandleMark to bypass the NoHandleMark, and
887 // then use a HandleMark to ensure any Handles we do create are
888 // cleaned up in this scope.
889 ResetNoHandleMark rnhm;
890 HandleMark hm(thread);
891
892 frame stub_frame = thread->last_frame();
893
894 Continuation::notify_deopt(thread, stub_frame.sp());
895
896 // Since the frame to unpack is the top frame of this thread, the vframe_array_head
897 // must point to the vframeArray for the unpack frame.
1757 if (monitors != nullptr) {
1758 // Unlock in reverse order starting from most nested monitor.
1759 for (int j = (monitors->number_of_monitors() - 1); j >= 0; j--) {
1760 BasicObjectLock* src = monitors->at(j);
1761 if (src->obj() != nullptr) {
1762 ObjectSynchronizer::exit(src->obj(), src->lock(), thread);
1763 }
1764 }
1765 array->element(i)->free_monitors();
1766 #ifdef ASSERT
1767 array->element(i)->set_removed_monitors();
1768 #endif
1769 }
1770 }
1771 }
1772 #endif
1773
1774 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) {
1775 assert(fr.can_be_deoptimized(), "checking frame type");
1776
1777 nmethod* nm = fr.cb()->as_nmethod_or_null();
1778 assert(nm != nullptr, "only compiled methods can deopt");
1779 DeoptAction action = (nm->is_not_entrant() ? Action_make_not_entrant : Action_none);
1780 ScopeDesc* cur_sd = nm->scope_desc_at(fr.pc());
1781 Bytecodes::Code bc = (cur_sd->bci() == -1 ? Bytecodes::_nop // deopt on method entry
1782 : cur_sd->method()->java_code_at(cur_sd->bci()));
1783 gather_statistics(nm, reason, action, bc);
1784
1785 if (LogCompilation && xtty != nullptr) {
1786 ttyLocker ttyl;
1787 xtty->begin_head("deoptimized thread='%zu' reason='%s' pc='" INTPTR_FORMAT "'",(uintx)thread->osthread()->thread_id(), trap_reason_name(reason), p2i(fr.pc()));
1788 nm->log_identity(xtty);
1789 xtty->end_head();
1790 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) {
1791 xtty->begin_elem("jvms bci='%d'", sd->bci());
1792 xtty->method(sd->method());
1793 xtty->end_elem();
1794 if (sd->is_top()) break;
1795 }
1796 xtty->tail("deoptimized");
1797 }
1798
1799 Continuation::notify_deopt(thread, fr.sp());
1800
1801 // Patch the compiled method so that when execution returns to it we will
1802 // deopt the execution state and return to the interpreter.
1803 fr.deoptimize(thread);
1804 }
1805
2001 event.set_compileId(nm->compile_id());
2002 event.set_compiler(nm->compiler_type());
2003 event.set_method(method);
2004 event.set_lineNumber(method->line_number_from_bci(trap_bci));
2005 event.set_bci(trap_bci);
2006 event.set_instruction(instruction);
2007 event.set_reason(reason);
2008 event.set_action(action);
2009 event.commit();
2010 }
2011 }
2012
2013 #endif // INCLUDE_JFR
2014
2015 static void log_deopt(nmethod* nm, Method* tm, intptr_t pc, frame& fr, int trap_bci,
2016 const char* reason_name, const char* reason_action) {
2017 LogTarget(Debug, deoptimization) lt;
2018 if (lt.is_enabled()) {
2019 LogStream ls(lt);
2020 bool is_osr = nm->is_osr_method();
2021 ls.print("cid=%4d %s%s%s level=%d",
2022 nm->compile_id(), (is_osr ? "osr" : " "),
2023 (nm->is_aot() ? "aot " : ""),
2024 (nm->preloaded() ? "preload " : ""),
2025 nm->comp_level());
2026 ls.print(" %s", tm->name_and_sig_as_C_string());
2027 ls.print(" trap_bci=%d ", trap_bci);
2028 if (is_osr) {
2029 ls.print("osr_bci=%d ", nm->osr_entry_bci());
2030 }
2031 ls.print("%s ", reason_name);
2032 ls.print("%s ", reason_action);
2033 ls.print_cr("pc=" INTPTR_FORMAT " relative_pc=" INTPTR_FORMAT,
2034 pc, fr.pc() - nm->code_begin());
2035 }
2036 }
2037
2038 JRT_ENTRY_PROF(void, Deoptimization, uncommon_trap_inner, Deoptimization::uncommon_trap_inner(JavaThread* current, jint trap_request)) {
2039 HandleMark hm(current);
2040
2041 // uncommon_trap() is called at the beginning of the uncommon trap
2042 // handler. Note this fact before we start generating temporary frames
2043 // that can confuse an asynchronous stack walker. This counter is
2044 // decremented at the end of unpack_frames().
2045
2046 current->inc_in_deopt_handler();
2047
2048 #if INCLUDE_JVMCI
2049 // JVMCI might need to get an exception from the stack, which in turn requires the register map to be valid
2050 RegisterMap reg_map(current,
2051 RegisterMap::UpdateMap::include,
2052 RegisterMap::ProcessFrames::include,
2053 RegisterMap::WalkContinuation::skip);
2054 #else
2055 RegisterMap reg_map(current,
2056 RegisterMap::UpdateMap::skip,
2057 RegisterMap::ProcessFrames::include,
2058 RegisterMap::WalkContinuation::skip);
2094 #if INCLUDE_JVMCI
2095 jlong speculation = current->pending_failed_speculation();
2096 if (nm->is_compiled_by_jvmci()) {
2097 nm->update_speculation(current);
2098 } else {
2099 assert(speculation == 0, "There should not be a speculation for methods compiled by non-JVMCI compilers");
2100 }
2101
2102 if (trap_bci == SynchronizationEntryBCI) {
2103 trap_bci = 0;
2104 current->set_pending_monitorenter(true);
2105 }
2106
2107 if (reason == Deoptimization::Reason_transfer_to_interpreter) {
2108 current->set_pending_transfer_to_interpreter(true);
2109 }
2110 #endif
2111
2112 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci);
2113 // Record this event in the histogram.
2114 gather_statistics(nm, reason, action, trap_bc);
2115
2116 // Ensure that we can record deopt. history:
2117 bool create_if_missing = ProfileTraps;
2118
2119 methodHandle profiled_method;
2120 #if INCLUDE_JVMCI
2121 if (nm->is_compiled_by_jvmci()) {
2122 profiled_method = methodHandle(current, nm->method());
2123 } else {
2124 profiled_method = trap_method;
2125 }
2126 #else
2127 profiled_method = trap_method;
2128 #endif
2129
2130 const char* nm_kind = nm->compile_kind();
2131 MethodData* trap_mdo =
2132 get_method_data(current, profiled_method, create_if_missing);
2133
2134 { // Log Deoptimization event for JFR, UL and event system
2135 Method* tm = trap_method();
2136 const char* reason_name = trap_reason_name(reason);
2137 const char* reason_action = trap_action_name(action);
2138 intptr_t pc = p2i(fr.pc());
2139
2140 JFR_ONLY(post_deoptimization_event(nm, tm, trap_bci, trap_bc, reason, action);)
2141 log_deopt(nm, tm, pc, fr, trap_bci, reason_name, reason_action);
2142 Events::log_deopt_message(current, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d %s %s",
2143 reason_name, reason_action, pc,
2144 tm->name_and_sig_as_C_string(), trap_bci, nm->compiler_name(), nm_kind);
2145 }
2146
2147 // Print a bunch of diagnostics, if requested.
2148 if (TraceDeoptimization || LogCompilation || is_receiver_constraint_failure) {
2149 ResourceMark rm;
2150
2151 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
2152 // We must do this already now, since we cannot acquire this lock while
2153 // holding the tty lock (lock ordering by rank).
2154 MutexLocker ml(trap_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
2155
2156 ttyLocker ttyl;
2157
2158 char buf[100];
2159 if (xtty != nullptr) {
2160 xtty->begin_head("uncommon_trap thread='%zu' %s",
2161 os::current_thread_id(),
2162 format_trap_request(buf, sizeof(buf), trap_request));
2163 #if INCLUDE_JVMCI
2164 if (speculation != 0) {
2195 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci);
2196 int dos = (pdata == nullptr)? 0: pdata->trap_state();
2197 if (dos != 0) {
2198 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos));
2199 if (trap_state_is_recompiled(dos)) {
2200 int recnt2 = trap_mdo->overflow_recompile_count();
2201 if (recnt2 != 0)
2202 xtty->print(" recompiles2='%d'", recnt2);
2203 }
2204 }
2205 }
2206 if (xtty != nullptr) {
2207 xtty->stamp();
2208 xtty->end_head();
2209 }
2210 if (TraceDeoptimization) { // make noise on the tty
2211 stringStream st;
2212 st.print("UNCOMMON TRAP method=%s", trap_scope->method()->name_and_sig_as_C_string());
2213 st.print(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=" INTPTR_FORMAT JVMCI_ONLY(", debug_id=%d"),
2214 trap_scope->bci(), p2i(fr.pc()), fr.pc() - nm->code_begin() JVMCI_ONLY(COMMA debug_id));
2215 st.print(" compiler=%s compile_id=%d kind=%s", nm->compiler_name(), nm->compile_id(), nm_kind);
2216 #if INCLUDE_JVMCI
2217 if (nm->is_compiled_by_jvmci()) {
2218 const char* installed_code_name = nm->jvmci_name();
2219 if (installed_code_name != nullptr) {
2220 st.print(" (JVMCI: installed code name=%s) ", installed_code_name);
2221 }
2222 }
2223 #endif
2224 st.print(" (@" INTPTR_FORMAT ") thread=%zu reason=%s action=%s unloaded_class_index=%d" JVMCI_ONLY(" debug_id=%d"),
2225 p2i(fr.pc()),
2226 os::current_thread_id(),
2227 trap_reason_name(reason),
2228 trap_action_name(action),
2229 unloaded_class_index
2230 #if INCLUDE_JVMCI
2231 , debug_id
2232 #endif
2233 );
2234 if (class_name != nullptr) {
2235 st.print(unresolved ? " unresolved class: " : " symbol: ");
2613 bool ignore_maybe_prior_recompile;
2614 assert(!reason_is_speculate(reason), "reason speculate only used by compiler");
2615 // JVMCI uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts
2616 bool update_total_counts = true JVMCI_ONLY( && !UseJVMCICompiler);
2617
2618 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
2619 MutexLocker ml(trap_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
2620
2621 query_update_method_data(trap_mdo, trap_bci,
2622 (DeoptReason)reason,
2623 update_total_counts,
2624 #if INCLUDE_JVMCI
2625 false,
2626 #endif
2627 nullptr,
2628 ignore_this_trap_count,
2629 ignore_maybe_prior_trap,
2630 ignore_maybe_prior_recompile);
2631 }
2632
2633 PROF_ENTRY(Deoptimization::UnrollBlock*, Deoptimization, uncommon_trap, Deoptimization::uncommon_trap(JavaThread* current, jint trap_request, jint exec_mode))
2634 // Enable WXWrite: current function is called from methods compiled by C2 directly
2635 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
2636
2637 // Still in Java no safepoints
2638 {
2639 // This enters VM and may safepoint
2640 uncommon_trap_inner(current, trap_request);
2641 }
2642 HandleMark hm(current);
2643 return fetch_unroll_info_helper(current, exec_mode);
2644 PROF_END
2645
2646 // Local derived constants.
2647 // Further breakdown of DataLayout::trap_state, as promised by DataLayout.
2648 const int DS_REASON_MASK = ((uint)DataLayout::trap_mask) >> 1;
2649 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK;
2650
2651 //---------------------------trap_state_reason---------------------------------
2652 Deoptimization::DeoptReason
2653 Deoptimization::trap_state_reason(int trap_state) {
2654 // This assert provides the link between the width of DataLayout::trap_bits
2655 // and the encoding of "recorded" reasons. It ensures there are enough
2656 // bits to store all needed reasons in the per-BCI MDO profile.
2657 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits");
2658 int recompile_bit = (trap_state & DS_RECOMPILE_BIT);
2659 trap_state -= recompile_bit;
2660 if (trap_state == DS_REASON_MASK) {
2661 return Reason_many;
2662 } else {
2663 assert((int)Reason_none == 0, "state=0 => Reason_none");
2664 return (DeoptReason)trap_state;
2814 size_t len;
2815 if (unloaded_class_index < 0) {
2816 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" JVMCI_ONLY(" debug_id='%d'"),
2817 reason, action
2818 #if INCLUDE_JVMCI
2819 ,debug_id
2820 #endif
2821 );
2822 } else {
2823 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" JVMCI_ONLY(" debug_id='%d'"),
2824 reason, action, unloaded_class_index
2825 #if INCLUDE_JVMCI
2826 ,debug_id
2827 #endif
2828 );
2829 }
2830 return buf;
2831 }
2832
2833 juint Deoptimization::_deoptimization_hist
2834 [1 + 4 + 5] // total + online + archived
2835 [Deoptimization::Reason_LIMIT]
2836 [1 + Deoptimization::Action_LIMIT]
2837 [Deoptimization::BC_CASE_LIMIT]
2838 = {0};
2839
2840 enum {
2841 LSB_BITS = 8,
2842 LSB_MASK = right_n_bits(LSB_BITS)
2843 };
2844
2845 static void update(juint* cases, Bytecodes::Code bc) {
2846 juint* bc_counter_addr = nullptr;
2847 juint bc_counter = 0;
2848 // Look for an unused counter, or an exact match to this BC.
2849 if (bc != Bytecodes::_illegal) {
2850 for (int bc_case = 0; bc_case < Deoptimization::BC_CASE_LIMIT; bc_case++) {
2851 juint* counter_addr = &cases[bc_case];
2852 juint counter = *counter_addr;
2853 if ((counter == 0 && bc_counter_addr == nullptr)
2854 || (Bytecodes::Code)(counter & LSB_MASK) == bc) {
2855 // this counter is either free or is already devoted to this BC
2856 bc_counter_addr = counter_addr;
2857 bc_counter = counter | bc;
2858 }
2859 }
2860 }
2861 if (bc_counter_addr == nullptr) {
2862 // Overflow, or no given bytecode.
2863 bc_counter_addr = &cases[Deoptimization::BC_CASE_LIMIT-1];
2864 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB
2865 }
2866 *bc_counter_addr = bc_counter + (1 << LSB_BITS);
2867 }
2868
2869
2870 void Deoptimization::gather_statistics(nmethod* nm, DeoptReason reason, DeoptAction action,
2871 Bytecodes::Code bc) {
2872 assert(reason >= 0 && reason < Reason_LIMIT, "oob");
2873 assert(action >= 0 && action < Action_LIMIT, "oob");
2874 _deoptimization_hist[0][Reason_none][0][0] += 1; // total
2875 _deoptimization_hist[0][reason][0][0] += 1; // per-reason total
2876
2877 update(_deoptimization_hist[0][reason][1+action], bc);
2878
2879 uint lvl = nm->comp_level() + (nm->is_aot() ? 4 : 0) + (nm->preloaded() ? 1 : 0);
2880 _deoptimization_hist[lvl][Reason_none][0][0] += 1; // total
2881 _deoptimization_hist[lvl][reason][0][0] += 1; // per-reason total
2882 update(_deoptimization_hist[lvl][reason][1+action], bc);
2883 }
2884
2885 jint Deoptimization::total_deoptimization_count() {
2886 return _deoptimization_hist[0][Reason_none][0][0];
2887 }
2888
2889 // Get the deopt count for a specific reason and a specific action. If either
2890 // one of 'reason' or 'action' is null, the method returns the sum of all
2891 // deoptimizations with the specific 'action' or 'reason' respectively.
2892 // If both arguments are null, the method returns the total deopt count.
2893 jint Deoptimization::deoptimization_count(const char *reason_str, const char *action_str) {
2894 if (reason_str == nullptr && action_str == nullptr) {
2895 return total_deoptimization_count();
2896 }
2897 juint counter = 0;
2898 for (int reason = 0; reason < Reason_LIMIT; reason++) {
2899 if (reason_str == nullptr || !strcmp(reason_str, trap_reason_name(reason))) {
2900 for (int action = 0; action < Action_LIMIT; action++) {
2901 if (action_str == nullptr || !strcmp(action_str, trap_action_name(action))) {
2902 juint* cases = _deoptimization_hist[0][reason][1+action];
2903 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
2904 counter += cases[bc_case] >> LSB_BITS;
2905 }
2906 }
2907 }
2908 }
2909 }
2910 return counter;
2911 }
2912
2913 void Deoptimization::print_statistics() {
2914 ttyLocker ttyl;
2915 if (xtty != nullptr) xtty->head("statistics type='deoptimization'");
2916 tty->print_cr("Deoptimization traps recorded:");
2917 print_statistics_on(tty);
2918 if (xtty != nullptr) xtty->tail("statistics");
2919 }
2920
2921 void Deoptimization::print_statistics_on(const char* title, int lvl, outputStream* st) {
2922 juint total = _deoptimization_hist[lvl][Reason_none][0][0];
2923 juint account = total;
2924 #define PRINT_STAT_LINE(name, r) \
2925 st->print_cr(" %d (%4.1f%%) %s", (int)(r), ((r) == total ? 100.0 : (((r) * 100.0) / total)), name);
2926 if (total > 0) {
2927 st->print(" %s: ", title);
2928 PRINT_STAT_LINE("total", total);
2929 // For each non-zero entry in the histogram, print the reason,
2930 // the action, and (if specifically known) the type of bytecode.
2931 for (int reason = 0; reason < Reason_LIMIT; reason++) {
2932 for (int action = 0; action < Action_LIMIT; action++) {
2933 juint* cases = Deoptimization::_deoptimization_hist[lvl][reason][1+action];
2934 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) {
2935 juint counter = cases[bc_case];
2936 if (counter != 0) {
2937 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK);
2938 const char* bc_name = "other";
2939 if (bc_case == (BC_CASE_LIMIT-1) && bc == Bytecodes::_nop) {
2940 // overwritten
2941 } else if (Bytecodes::is_defined(bc)) {
2942 bc_name = Bytecodes::name(bc);
2943 }
2944 juint r = counter >> LSB_BITS;
2945 st->print_cr(" %-34s %16s %16s: " UINT32_FORMAT_W(5) " (%4.1f%%)",
2946 trap_reason_name(reason), trap_action_name(action), bc_name,
2947 r, (r * 100.0) / total);
2948 account -= r;
2949 }
2950 }
2951 }
2952 }
2953 if (account != 0) {
2954 PRINT_STAT_LINE("unaccounted", account);
2955 }
2956 #undef PRINT_STAT_LINE
2957 }
2958 }
2959
2960 void Deoptimization::print_statistics_on(outputStream* st) {
2961 // print_statistics_on("Total", 0, st);
2962 print_statistics_on("Tier1", 1, st);
2963 print_statistics_on("Tier2", 2, st);
2964 print_statistics_on("Tier3", 3, st);
2965 print_statistics_on("Tier4", 4, st);
2966
2967 print_statistics_on("AOT Code Tier1", 5, st);
2968 print_statistics_on("AOT Code Tier2", 6, st);
2969 print_statistics_on("AOT Code Tier4", 8, st);
2970 print_statistics_on("AOT Code Tier5 (preloaded)", 9, st);
2971 }
2972
2973 #define DO_COUNTERS(macro) \
2974 macro(Deoptimization, fetch_unroll_info) \
2975 macro(Deoptimization, unpack_frames) \
2976 macro(Deoptimization, uncommon_trap_inner) \
2977 macro(Deoptimization, uncommon_trap)
2978
2979 #define INIT_COUNTER(sub, name) \
2980 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_RT, #sub "::" #name) \
2981 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_RT, #sub "::" #name "_count");
2982
2983 void Deoptimization::init_counters() {
2984 if (ProfileRuntimeCalls && UsePerfData) {
2985 EXCEPTION_MARK;
2986
2987 DO_COUNTERS(INIT_COUNTER)
2988
2989 if (HAS_PENDING_EXCEPTION) {
2990 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
2991 }
2992 }
2993 }
2994 #undef INIT_COUNTER
2995
2996 #define PRINT_COUNTER(sub, name) { \
2997 jlong count = _perf_##sub##_##name##_count->get_value(); \
2998 if (count > 0) { \
2999 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", #sub "::" #name, \
3000 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
3001 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
3002 count); \
3003 }}
3004
3005 void Deoptimization::print_counters_on(outputStream* st) {
3006 if (ProfileRuntimeCalls && UsePerfData) {
3007 DO_COUNTERS(PRINT_COUNTER)
3008 } else {
3009 st->print_cr(" Deoptimization: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
3010 }
3011 }
3012
3013 #undef PRINT_COUNTER
3014 #undef DO_COUNTERS
3015
3016 #else // COMPILER2_OR_JVMCI
3017
3018
3019 // Stubs for C1 only system.
3020 bool Deoptimization::trap_state_is_recompiled(int trap_state) {
3021 return false;
3022 }
3023
3024 const char* Deoptimization::trap_reason_name(int reason) {
3025 return "unknown";
3026 }
3027
3028 jint Deoptimization::total_deoptimization_count() {
3029 return 0;
3030 }
3031
3032 jint Deoptimization::deoptimization_count(const char *reason_str, const char *action_str) {
3033 return 0;
3034 }
3035
3036 void Deoptimization::print_statistics() {
3037 // no output
3038 }
3039
3040 void
3041 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) {
3042 // no update
3043 }
3044
3045 int Deoptimization::trap_state_has_reason(int trap_state, int reason) {
3046 return 0;
3047 }
3048
3049 void Deoptimization::gather_statistics(nmethod* nm, DeoptReason reason, DeoptAction action,
3050 Bytecodes::Code bc) {
3051 // no update
3052 }
3053
3054 const char* Deoptimization::format_trap_state(char* buf, size_t buflen,
3055 int trap_state) {
3056 jio_snprintf(buf, buflen, "#%d", trap_state);
3057 return buf;
3058 }
3059
3060 void Deoptimization::init_counters() {
3061 // nothing to do
3062 }
3063
3064 void Deoptimization::print_counters_on(outputStream* st) {
3065 // no output
3066 }
3067
3068 void Deoptimization::print_statistics_on(outputStream* st) {
3069 // no output
3070 }
3071
3072 #endif // COMPILER2_OR_JVMCI
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