| /* |
| * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| # include "incls/_precompiled.incl" |
| # include "incls/_nmethod.cpp.incl" |
| |
| #ifdef DTRACE_ENABLED |
| |
| // Only bother with this argument setup if dtrace is available |
| |
| HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
| const char*, int, const char*, int, const char*, int, void*, size_t); |
| |
| HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, |
| char*, int, char*, int, char*, int); |
| |
| #define DTRACE_METHOD_UNLOAD_PROBE(method) \ |
| { \ |
| methodOop m = (method); \ |
| if (m != NULL) { \ |
| symbolOop klass_name = m->klass_name(); \ |
| symbolOop name = m->name(); \ |
| symbolOop signature = m->signature(); \ |
| HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
| klass_name->bytes(), klass_name->utf8_length(), \ |
| name->bytes(), name->utf8_length(), \ |
| signature->bytes(), signature->utf8_length()); \ |
| } \ |
| } |
| |
| #else // ndef DTRACE_ENABLED |
| |
| #define DTRACE_METHOD_UNLOAD_PROBE(method) |
| |
| #endif |
| |
| bool nmethod::is_compiled_by_c1() const { |
| if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
| if (is_native_method()) return false; |
| return compiler()->is_c1(); |
| } |
| bool nmethod::is_compiled_by_c2() const { |
| if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
| if (is_native_method()) return false; |
| return compiler()->is_c2(); |
| } |
| bool nmethod::is_compiled_by_shark() const { |
| if (is_native_method()) return false; |
| assert(compiler() != NULL, "must be"); |
| return compiler()->is_shark(); |
| } |
| |
| |
| |
| //--------------------------------------------------------------------------------- |
| // NMethod statistics |
| // They are printed under various flags, including: |
| // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. |
| // (In the latter two cases, they like other stats are printed to the log only.) |
| |
| #ifndef PRODUCT |
| // These variables are put into one block to reduce relocations |
| // and make it simpler to print from the debugger. |
| static |
| struct nmethod_stats_struct { |
| int nmethod_count; |
| int total_size; |
| int relocation_size; |
| int consts_size; |
| int insts_size; |
| int stub_size; |
| int scopes_data_size; |
| int scopes_pcs_size; |
| int dependencies_size; |
| int handler_table_size; |
| int nul_chk_table_size; |
| int oops_size; |
| |
| void note_nmethod(nmethod* nm) { |
| nmethod_count += 1; |
| total_size += nm->size(); |
| relocation_size += nm->relocation_size(); |
| consts_size += nm->consts_size(); |
| insts_size += nm->insts_size(); |
| stub_size += nm->stub_size(); |
| oops_size += nm->oops_size(); |
| scopes_data_size += nm->scopes_data_size(); |
| scopes_pcs_size += nm->scopes_pcs_size(); |
| dependencies_size += nm->dependencies_size(); |
| handler_table_size += nm->handler_table_size(); |
| nul_chk_table_size += nm->nul_chk_table_size(); |
| } |
| void print_nmethod_stats() { |
| if (nmethod_count == 0) return; |
| tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); |
| if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); |
| if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); |
| if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
| if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
| if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
| if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
| if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
| if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); |
| if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); |
| if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); |
| if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); |
| } |
| |
| int native_nmethod_count; |
| int native_total_size; |
| int native_relocation_size; |
| int native_insts_size; |
| int native_oops_size; |
| void note_native_nmethod(nmethod* nm) { |
| native_nmethod_count += 1; |
| native_total_size += nm->size(); |
| native_relocation_size += nm->relocation_size(); |
| native_insts_size += nm->insts_size(); |
| native_oops_size += nm->oops_size(); |
| } |
| void print_native_nmethod_stats() { |
| if (native_nmethod_count == 0) return; |
| tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); |
| if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); |
| if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); |
| if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
| if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
| } |
| |
| int pc_desc_resets; // number of resets (= number of caches) |
| int pc_desc_queries; // queries to nmethod::find_pc_desc |
| int pc_desc_approx; // number of those which have approximate true |
| int pc_desc_repeats; // number of _last_pc_desc hits |
| int pc_desc_hits; // number of LRU cache hits |
| int pc_desc_tests; // total number of PcDesc examinations |
| int pc_desc_searches; // total number of quasi-binary search steps |
| int pc_desc_adds; // number of LUR cache insertions |
| |
| void print_pc_stats() { |
| tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", |
| pc_desc_queries, |
| (double)(pc_desc_tests + pc_desc_searches) |
| / pc_desc_queries); |
| tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", |
| pc_desc_resets, |
| pc_desc_queries, pc_desc_approx, |
| pc_desc_repeats, pc_desc_hits, |
| pc_desc_tests, pc_desc_searches, pc_desc_adds); |
| } |
| } nmethod_stats; |
| #endif //PRODUCT |
| |
| //--------------------------------------------------------------------------------- |
| |
| |
| // The _unwind_handler is a special marker address, which says that |
| // for given exception oop and address, the frame should be removed |
| // as the tuple cannot be caught in the nmethod |
| address ExceptionCache::_unwind_handler = (address) -1; |
| |
| |
| ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { |
| assert(pc != NULL, "Must be non null"); |
| assert(exception.not_null(), "Must be non null"); |
| assert(handler != NULL, "Must be non null"); |
| |
| _count = 0; |
| _exception_type = exception->klass(); |
| _next = NULL; |
| |
| add_address_and_handler(pc,handler); |
| } |
| |
| |
| address ExceptionCache::match(Handle exception, address pc) { |
| assert(pc != NULL,"Must be non null"); |
| assert(exception.not_null(),"Must be non null"); |
| if (exception->klass() == exception_type()) { |
| return (test_address(pc)); |
| } |
| |
| return NULL; |
| } |
| |
| |
| bool ExceptionCache::match_exception_with_space(Handle exception) { |
| assert(exception.not_null(),"Must be non null"); |
| if (exception->klass() == exception_type() && count() < cache_size) { |
| return true; |
| } |
| return false; |
| } |
| |
| |
| address ExceptionCache::test_address(address addr) { |
| for (int i=0; i<count(); i++) { |
| if (pc_at(i) == addr) { |
| return handler_at(i); |
| } |
| } |
| return NULL; |
| } |
| |
| |
| bool ExceptionCache::add_address_and_handler(address addr, address handler) { |
| if (test_address(addr) == handler) return true; |
| if (count() < cache_size) { |
| set_pc_at(count(),addr); |
| set_handler_at(count(), handler); |
| increment_count(); |
| return true; |
| } |
| return false; |
| } |
| |
| |
| // private method for handling exception cache |
| // These methods are private, and used to manipulate the exception cache |
| // directly. |
| ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { |
| ExceptionCache* ec = exception_cache(); |
| while (ec != NULL) { |
| if (ec->match_exception_with_space(exception)) { |
| return ec; |
| } |
| ec = ec->next(); |
| } |
| return NULL; |
| } |
| |
| |
| //----------------------------------------------------------------------------- |
| |
| |
| // Helper used by both find_pc_desc methods. |
| static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { |
| NOT_PRODUCT(++nmethod_stats.pc_desc_tests); |
| if (!approximate) |
| return pc->pc_offset() == pc_offset; |
| else |
| return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); |
| } |
| |
| void PcDescCache::reset_to(PcDesc* initial_pc_desc) { |
| if (initial_pc_desc == NULL) { |
| _last_pc_desc = NULL; // native method |
| return; |
| } |
| NOT_PRODUCT(++nmethod_stats.pc_desc_resets); |
| // reset the cache by filling it with benign (non-null) values |
| assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); |
| _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel |
| for (int i = 0; i < cache_size; i++) |
| _pc_descs[i] = initial_pc_desc; |
| } |
| |
| PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { |
| NOT_PRODUCT(++nmethod_stats.pc_desc_queries); |
| NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
| |
| // In order to prevent race conditions do not load cache elements |
| // repeatedly, but use a local copy: |
| PcDesc* res; |
| |
| // Step one: Check the most recently returned value. |
| res = _last_pc_desc; |
| if (res == NULL) return NULL; // native method; no PcDescs at all |
| if (match_desc(res, pc_offset, approximate)) { |
| NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); |
| return res; |
| } |
| |
| // Step two: Check the LRU cache. |
| for (int i = 0; i < cache_size; i++) { |
| res = _pc_descs[i]; |
| if (res->pc_offset() < 0) break; // optimization: skip empty cache |
| if (match_desc(res, pc_offset, approximate)) { |
| NOT_PRODUCT(++nmethod_stats.pc_desc_hits); |
| _last_pc_desc = res; // record this cache hit in case of repeat |
| return res; |
| } |
| } |
| |
| // Report failure. |
| return NULL; |
| } |
| |
| void PcDescCache::add_pc_desc(PcDesc* pc_desc) { |
| NOT_PRODUCT(++nmethod_stats.pc_desc_adds); |
| // Update the LRU cache by shifting pc_desc forward: |
| for (int i = 0; i < cache_size; i++) { |
| PcDesc* next = _pc_descs[i]; |
| _pc_descs[i] = pc_desc; |
| pc_desc = next; |
| } |
| // Note: Do not update _last_pc_desc. It fronts for the LRU cache. |
| } |
| |
| // adjust pcs_size so that it is a multiple of both oopSize and |
| // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple |
| // of oopSize, then 2*sizeof(PcDesc) is) |
| static int adjust_pcs_size(int pcs_size) { |
| int nsize = round_to(pcs_size, oopSize); |
| if ((nsize % sizeof(PcDesc)) != 0) { |
| nsize = pcs_size + sizeof(PcDesc); |
| } |
| assert((nsize % oopSize) == 0, "correct alignment"); |
| return nsize; |
| } |
| |
| //----------------------------------------------------------------------------- |
| |
| |
| void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { |
| assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); |
| assert(new_entry != NULL,"Must be non null"); |
| assert(new_entry->next() == NULL, "Must be null"); |
| |
| if (exception_cache() != NULL) { |
| new_entry->set_next(exception_cache()); |
| } |
| set_exception_cache(new_entry); |
| } |
| |
| void nmethod::remove_from_exception_cache(ExceptionCache* ec) { |
| ExceptionCache* prev = NULL; |
| ExceptionCache* curr = exception_cache(); |
| assert(curr != NULL, "nothing to remove"); |
| // find the previous and next entry of ec |
| while (curr != ec) { |
| prev = curr; |
| curr = curr->next(); |
| assert(curr != NULL, "ExceptionCache not found"); |
| } |
| // now: curr == ec |
| ExceptionCache* next = curr->next(); |
| if (prev == NULL) { |
| set_exception_cache(next); |
| } else { |
| prev->set_next(next); |
| } |
| delete curr; |
| } |
| |
| |
| // public method for accessing the exception cache |
| // These are the public access methods. |
| address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { |
| // We never grab a lock to read the exception cache, so we may |
| // have false negatives. This is okay, as it can only happen during |
| // the first few exception lookups for a given nmethod. |
| ExceptionCache* ec = exception_cache(); |
| while (ec != NULL) { |
| address ret_val; |
| if ((ret_val = ec->match(exception,pc)) != NULL) { |
| return ret_val; |
| } |
| ec = ec->next(); |
| } |
| return NULL; |
| } |
| |
| |
| void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { |
| // There are potential race conditions during exception cache updates, so we |
| // must own the ExceptionCache_lock before doing ANY modifications. Because |
| // we don't lock during reads, it is possible to have several threads attempt |
| // to update the cache with the same data. We need to check for already inserted |
| // copies of the current data before adding it. |
| |
| MutexLocker ml(ExceptionCache_lock); |
| ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); |
| |
| if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { |
| target_entry = new ExceptionCache(exception,pc,handler); |
| add_exception_cache_entry(target_entry); |
| } |
| } |
| |
| |
| //-------------end of code for ExceptionCache-------------- |
| |
| |
| int nmethod::total_size() const { |
| return |
| consts_size() + |
| insts_size() + |
| stub_size() + |
| scopes_data_size() + |
| scopes_pcs_size() + |
| handler_table_size() + |
| nul_chk_table_size(); |
| } |
| |
| const char* nmethod::compile_kind() const { |
| if (is_osr_method()) return "osr"; |
| if (method() != NULL && is_native_method()) return "c2n"; |
| return NULL; |
| } |
| |
| // Fill in default values for various flag fields |
| void nmethod::init_defaults() { |
| _state = alive; |
| _marked_for_reclamation = 0; |
| _has_flushed_dependencies = 0; |
| _speculatively_disconnected = 0; |
| _has_unsafe_access = 0; |
| _has_method_handle_invokes = 0; |
| _marked_for_deoptimization = 0; |
| _lock_count = 0; |
| _stack_traversal_mark = 0; |
| _unload_reported = false; // jvmti state |
| |
| NOT_PRODUCT(_has_debug_info = false); |
| #ifdef ASSERT |
| _oops_are_stale = false; |
| #endif |
| |
| _oops_do_mark_link = NULL; |
| _jmethod_id = NULL; |
| _osr_link = NULL; |
| _scavenge_root_link = NULL; |
| _scavenge_root_state = 0; |
| _saved_nmethod_link = NULL; |
| _compiler = NULL; |
| |
| #ifdef HAVE_DTRACE_H |
| _trap_offset = 0; |
| #endif // def HAVE_DTRACE_H |
| } |
| |
| |
| nmethod* nmethod::new_native_nmethod(methodHandle method, |
| CodeBuffer *code_buffer, |
| int vep_offset, |
| int frame_complete, |
| int frame_size, |
| ByteSize basic_lock_owner_sp_offset, |
| ByteSize basic_lock_sp_offset, |
| OopMapSet* oop_maps) { |
| // create nmethod |
| nmethod* nm = NULL; |
| { |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
| CodeOffsets offsets; |
| offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
| offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
| nm = new (native_nmethod_size) |
| nmethod(method(), native_nmethod_size, &offsets, |
| code_buffer, frame_size, |
| basic_lock_owner_sp_offset, basic_lock_sp_offset, |
| oop_maps); |
| NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
| if (PrintAssembly && nm != NULL) |
| Disassembler::decode(nm); |
| } |
| // verify nmethod |
| debug_only(if (nm) nm->verify();) // might block |
| |
| if (nm != NULL) { |
| nm->log_new_nmethod(); |
| } |
| |
| return nm; |
| } |
| |
| #ifdef HAVE_DTRACE_H |
| nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
| CodeBuffer *code_buffer, |
| int vep_offset, |
| int trap_offset, |
| int frame_complete, |
| int frame_size) { |
| // create nmethod |
| nmethod* nm = NULL; |
| { |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
| CodeOffsets offsets; |
| offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
| offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
| offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
| |
| nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
| |
| NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
| if (PrintAssembly && nm != NULL) |
| Disassembler::decode(nm); |
| } |
| // verify nmethod |
| debug_only(if (nm) nm->verify();) // might block |
| |
| if (nm != NULL) { |
| nm->log_new_nmethod(); |
| } |
| |
| return nm; |
| } |
| |
| #endif // def HAVE_DTRACE_H |
| |
| nmethod* nmethod::new_nmethod(methodHandle method, |
| int compile_id, |
| int entry_bci, |
| CodeOffsets* offsets, |
| int orig_pc_offset, |
| DebugInformationRecorder* debug_info, |
| Dependencies* dependencies, |
| CodeBuffer* code_buffer, int frame_size, |
| OopMapSet* oop_maps, |
| ExceptionHandlerTable* handler_table, |
| ImplicitExceptionTable* nul_chk_table, |
| AbstractCompiler* compiler, |
| int comp_level |
| ) |
| { |
| assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); |
| // create nmethod |
| nmethod* nm = NULL; |
| { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| int nmethod_size = |
| allocation_size(code_buffer, sizeof(nmethod)) |
| + adjust_pcs_size(debug_info->pcs_size()) |
| + round_to(dependencies->size_in_bytes() , oopSize) |
| + round_to(handler_table->size_in_bytes(), oopSize) |
| + round_to(nul_chk_table->size_in_bytes(), oopSize) |
| + round_to(debug_info->data_size() , oopSize); |
| nm = new (nmethod_size) |
| nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
| orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
| oop_maps, |
| handler_table, |
| nul_chk_table, |
| compiler, |
| comp_level); |
| if (nm != NULL) { |
| // To make dependency checking during class loading fast, record |
| // the nmethod dependencies in the classes it is dependent on. |
| // This allows the dependency checking code to simply walk the |
| // class hierarchy above the loaded class, checking only nmethods |
| // which are dependent on those classes. The slow way is to |
| // check every nmethod for dependencies which makes it linear in |
| // the number of methods compiled. For applications with a lot |
| // classes the slow way is too slow. |
| for (Dependencies::DepStream deps(nm); deps.next(); ) { |
| klassOop klass = deps.context_type(); |
| if (klass == NULL) continue; // ignore things like evol_method |
| |
| // record this nmethod as dependent on this klass |
| instanceKlass::cast(klass)->add_dependent_nmethod(nm); |
| } |
| } |
| NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
| if (PrintAssembly && nm != NULL) |
| Disassembler::decode(nm); |
| } |
| |
| // verify nmethod |
| debug_only(if (nm) nm->verify();) // might block |
| |
| if (nm != NULL) { |
| nm->log_new_nmethod(); |
| } |
| |
| // done |
| return nm; |
| } |
| |
| |
| // For native wrappers |
| nmethod::nmethod( |
| methodOop method, |
| int nmethod_size, |
| CodeOffsets* offsets, |
| CodeBuffer* code_buffer, |
| int frame_size, |
| ByteSize basic_lock_owner_sp_offset, |
| ByteSize basic_lock_sp_offset, |
| OopMapSet* oop_maps ) |
| : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), |
| nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), |
| _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), |
| _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) |
| { |
| { |
| debug_only(No_Safepoint_Verifier nsv;) |
| assert_locked_or_safepoint(CodeCache_lock); |
| |
| init_defaults(); |
| _method = method; |
| _entry_bci = InvocationEntryBci; |
| // We have no exception handler or deopt handler make the |
| // values something that will never match a pc like the nmethod vtable entry |
| _exception_offset = 0; |
| _deoptimize_offset = 0; |
| _deoptimize_mh_offset = 0; |
| _orig_pc_offset = 0; |
| |
| _consts_offset = data_offset(); |
| _stub_offset = data_offset(); |
| _oops_offset = data_offset(); |
| _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
| _scopes_pcs_offset = _scopes_data_offset; |
| _dependencies_offset = _scopes_pcs_offset; |
| _handler_table_offset = _dependencies_offset; |
| _nul_chk_table_offset = _handler_table_offset; |
| _nmethod_end_offset = _nul_chk_table_offset; |
| _compile_id = 0; // default |
| _comp_level = CompLevel_none; |
| _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); |
| _osr_entry_point = NULL; |
| _exception_cache = NULL; |
| _pc_desc_cache.reset_to(NULL); |
| |
| code_buffer->copy_oops_to(this); |
| debug_only(verify_scavenge_root_oops()); |
| CodeCache::commit(this); |
| } |
| |
| if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
| ttyLocker ttyl; // keep the following output all in one block |
| // This output goes directly to the tty, not the compiler log. |
| // To enable tools to match it up with the compilation activity, |
| // be sure to tag this tty output with the compile ID. |
| if (xtty != NULL) { |
| xtty->begin_head("print_native_nmethod"); |
| xtty->method(_method); |
| xtty->stamp(); |
| xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
| } |
| // print the header part first |
| print(); |
| // then print the requested information |
| if (PrintNativeNMethods) { |
| print_code(); |
| oop_maps->print(); |
| } |
| if (PrintRelocations) { |
| print_relocations(); |
| } |
| if (xtty != NULL) { |
| xtty->tail("print_native_nmethod"); |
| } |
| } |
| Events::log("Create nmethod " INTPTR_FORMAT, this); |
| } |
| |
| // For dtrace wrappers |
| #ifdef HAVE_DTRACE_H |
| nmethod::nmethod( |
| methodOop method, |
| int nmethod_size, |
| CodeOffsets* offsets, |
| CodeBuffer* code_buffer, |
| int frame_size) |
| : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
| nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
| _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
| _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
| { |
| { |
| debug_only(No_Safepoint_Verifier nsv;) |
| assert_locked_or_safepoint(CodeCache_lock); |
| |
| init_defaults(); |
| _method = method; |
| _entry_bci = InvocationEntryBci; |
| // We have no exception handler or deopt handler make the |
| // values something that will never match a pc like the nmethod vtable entry |
| _exception_offset = 0; |
| _deoptimize_offset = 0; |
| _deoptimize_mh_offset = 0; |
| _unwind_handler_offset = -1; |
| _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
| _orig_pc_offset = 0; |
| _consts_offset = data_offset(); |
| _stub_offset = data_offset(); |
| _oops_offset = data_offset(); |
| _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
| _scopes_pcs_offset = _scopes_data_offset; |
| _dependencies_offset = _scopes_pcs_offset; |
| _handler_table_offset = _dependencies_offset; |
| _nul_chk_table_offset = _handler_table_offset; |
| _nmethod_end_offset = _nul_chk_table_offset; |
| _compile_id = 0; // default |
| _comp_level = CompLevel_none; |
| _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); |
| _osr_entry_point = NULL; |
| _exception_cache = NULL; |
| _pc_desc_cache.reset_to(NULL); |
| |
| code_buffer->copy_oops_to(this); |
| debug_only(verify_scavenge_root_oops()); |
| CodeCache::commit(this); |
| } |
| |
| if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
| ttyLocker ttyl; // keep the following output all in one block |
| // This output goes directly to the tty, not the compiler log. |
| // To enable tools to match it up with the compilation activity, |
| // be sure to tag this tty output with the compile ID. |
| if (xtty != NULL) { |
| xtty->begin_head("print_dtrace_nmethod"); |
| xtty->method(_method); |
| xtty->stamp(); |
| xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
| } |
| // print the header part first |
| print(); |
| // then print the requested information |
| if (PrintNMethods) { |
| print_code(); |
| } |
| if (PrintRelocations) { |
| print_relocations(); |
| } |
| if (xtty != NULL) { |
| xtty->tail("print_dtrace_nmethod"); |
| } |
| } |
| Events::log("Create nmethod " INTPTR_FORMAT, this); |
| } |
| #endif // def HAVE_DTRACE_H |
| |
| void* nmethod::operator new(size_t size, int nmethod_size) { |
| // Always leave some room in the CodeCache for I2C/C2I adapters |
| if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; |
| return CodeCache::allocate(nmethod_size); |
| } |
| |
| |
| nmethod::nmethod( |
| methodOop method, |
| int nmethod_size, |
| int compile_id, |
| int entry_bci, |
| CodeOffsets* offsets, |
| int orig_pc_offset, |
| DebugInformationRecorder* debug_info, |
| Dependencies* dependencies, |
| CodeBuffer *code_buffer, |
| int frame_size, |
| OopMapSet* oop_maps, |
| ExceptionHandlerTable* handler_table, |
| ImplicitExceptionTable* nul_chk_table, |
| AbstractCompiler* compiler, |
| int comp_level |
| ) |
| : CodeBlob("nmethod", code_buffer, sizeof(nmethod), |
| nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), |
| _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
| _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
| { |
| assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); |
| { |
| debug_only(No_Safepoint_Verifier nsv;) |
| assert_locked_or_safepoint(CodeCache_lock); |
| |
| init_defaults(); |
| _method = method; |
| _entry_bci = entry_bci; |
| _compile_id = compile_id; |
| _comp_level = comp_level; |
| _compiler = compiler; |
| _orig_pc_offset = orig_pc_offset; |
| |
| // Section offsets |
| _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
| _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
| |
| // Exception handler and deopt handler are in the stub section |
| _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
| _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); |
| if (has_method_handle_invokes()) { |
| _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
| } else { |
| _deoptimize_mh_offset = -1; |
| } |
| if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
| _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
| } else { |
| _unwind_handler_offset = -1; |
| } |
| |
| _oops_offset = data_offset(); |
| _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
| _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
| _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
| _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); |
| _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); |
| _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); |
| |
| _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); |
| _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); |
| _exception_cache = NULL; |
| _pc_desc_cache.reset_to(scopes_pcs_begin()); |
| |
| // Copy contents of ScopeDescRecorder to nmethod |
| code_buffer->copy_oops_to(this); |
| debug_info->copy_to(this); |
| dependencies->copy_to(this); |
| if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
| CodeCache::add_scavenge_root_nmethod(this); |
| } |
| debug_only(verify_scavenge_root_oops()); |
| |
| CodeCache::commit(this); |
| |
| // Copy contents of ExceptionHandlerTable to nmethod |
| handler_table->copy_to(this); |
| nul_chk_table->copy_to(this); |
| |
| // we use the information of entry points to find out if a method is |
| // static or non static |
| assert(compiler->is_c2() || |
| _method->is_static() == (entry_point() == _verified_entry_point), |
| " entry points must be same for static methods and vice versa"); |
| } |
| |
| bool printnmethods = PrintNMethods |
| || CompilerOracle::should_print(_method) |
| || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
| if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
| print_nmethod(printnmethods); |
| } |
| |
| // Note: Do not verify in here as the CodeCache_lock is |
| // taken which would conflict with the CompiledIC_lock |
| // which taken during the verification of call sites. |
| // (was bug - gri 10/25/99) |
| |
| Events::log("Create nmethod " INTPTR_FORMAT, this); |
| } |
| |
| |
| // Print a short set of xml attributes to identify this nmethod. The |
| // output should be embedded in some other element. |
| void nmethod::log_identity(xmlStream* log) const { |
| log->print(" compile_id='%d'", compile_id()); |
| const char* nm_kind = compile_kind(); |
| if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); |
| if (compiler() != NULL) { |
| log->print(" compiler='%s'", compiler()->name()); |
| } |
| if (TieredCompilation) { |
| log->print(" level='%d'", comp_level()); |
| } |
| } |
| |
| |
| #define LOG_OFFSET(log, name) \ |
| if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ |
| log->print(" " XSTR(name) "_offset='%d'" , \ |
| (intptr_t)name##_begin() - (intptr_t)this) |
| |
| |
| void nmethod::log_new_nmethod() const { |
| if (LogCompilation && xtty != NULL) { |
| ttyLocker ttyl; |
| HandleMark hm; |
| xtty->begin_elem("nmethod"); |
| log_identity(xtty); |
| xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
| xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
| |
| LOG_OFFSET(xtty, relocation); |
| LOG_OFFSET(xtty, consts); |
| LOG_OFFSET(xtty, insts); |
| LOG_OFFSET(xtty, stub); |
| LOG_OFFSET(xtty, scopes_data); |
| LOG_OFFSET(xtty, scopes_pcs); |
| LOG_OFFSET(xtty, dependencies); |
| LOG_OFFSET(xtty, handler_table); |
| LOG_OFFSET(xtty, nul_chk_table); |
| LOG_OFFSET(xtty, oops); |
| |
| xtty->method(method()); |
| xtty->stamp(); |
| xtty->end_elem(); |
| } |
| } |
| |
| #undef LOG_OFFSET |
| |
| |
| void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
| methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { |
| bool is_synchronized = false, has_xhandler = false, is_native = false; |
| int code_size = -1; |
| if (method != NULL) { |
| is_synchronized = method->is_synchronized(); |
| has_xhandler = method->has_exception_handler(); |
| is_native = method->is_native(); |
| code_size = method->code_size(); |
| } |
| // print compilation number |
| st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); |
| |
| // print method attributes |
| const bool is_osr = bci != InvocationEntryBci; |
| const char blocking_char = is_blocking ? 'b' : ' '; |
| const char compile_type = is_osr ? '%' : ' '; |
| const char sync_char = is_synchronized ? 's' : ' '; |
| const char exception_char = has_xhandler ? '!' : ' '; |
| const char native_char = is_native ? 'n' : ' '; |
| st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); |
| if (TieredCompilation) { |
| st->print("%d ", comp_level); |
| } |
| |
| // print optional title |
| bool do_nl = false; |
| if (title != NULL) { |
| int tlen = (int) strlen(title); |
| bool do_nl = false; |
| if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
| st->print("%.*s", tlen, title); |
| } else { |
| do_nl = true; |
| } |
| |
| // print method name string if given |
| if (method_name != NULL) { |
| st->print(method_name); |
| } else { |
| // otherwise as the method to print itself |
| if (method != NULL && !Universe::heap()->is_gc_active()) { |
| method->print_short_name(st); |
| } else { |
| st->print("(method)"); |
| } |
| } |
| |
| if (method != NULL) { |
| // print osr_bci if any |
| if (is_osr) st->print(" @ %d", bci); |
| // print method size |
| st->print(" (%d bytes)", code_size); |
| } |
| if (do_nl) st->cr(); |
| } |
| |
| // Print out more verbose output usually for a newly created nmethod. |
| void nmethod::print_on(outputStream* st, const char* title) const { |
| if (st != NULL) { |
| ttyLocker ttyl; |
| print_compilation(st, /*method_name*/NULL, title, |
| method(), /*is_blocking*/false, |
| compile_id(), osr_entry_bci(), comp_level()); |
| if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
| } |
| } |
| |
| |
| void nmethod::print_nmethod(bool printmethod) { |
| ttyLocker ttyl; // keep the following output all in one block |
| if (xtty != NULL) { |
| xtty->begin_head("print_nmethod"); |
| xtty->stamp(); |
| xtty->end_head(); |
| } |
| // print the header part first |
| print(); |
| // then print the requested information |
| if (printmethod) { |
| print_code(); |
| print_pcs(); |
| oop_maps()->print(); |
| } |
| if (PrintDebugInfo) { |
| print_scopes(); |
| } |
| if (PrintRelocations) { |
| print_relocations(); |
| } |
| if (PrintDependencies) { |
| print_dependencies(); |
| } |
| if (PrintExceptionHandlers) { |
| print_handler_table(); |
| print_nul_chk_table(); |
| } |
| if (xtty != NULL) { |
| xtty->tail("print_nmethod"); |
| } |
| } |
| |
| |
| // Promote one word from an assembly-time handle to a live embedded oop. |
| inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
| if (handle == NULL || |
| // As a special case, IC oops are initialized to 1 or -1. |
| handle == (jobject) Universe::non_oop_word()) { |
| (*dest) = (oop) handle; |
| } else { |
| (*dest) = JNIHandles::resolve_non_null(handle); |
| } |
| } |
| |
| |
| void nmethod::copy_oops(GrowableArray<jobject>* array) { |
| //assert(oops_size() == 0, "do this handshake just once, please"); |
| int length = array->length(); |
| assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
| oop* dest = oops_begin(); |
| for (int index = 0 ; index < length; index++) { |
| initialize_immediate_oop(&dest[index], array->at(index)); |
| } |
| |
| // Now we can fix up all the oops in the code. We need to do this |
| // in the code because the assembler uses jobjects as placeholders. |
| // The code and relocations have already been initialized by the |
| // CodeBlob constructor, so it is valid even at this early point to |
| // iterate over relocations and patch the code. |
| fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
| } |
| |
| |
| bool nmethod::is_at_poll_return(address pc) { |
| RelocIterator iter(this, pc, pc+1); |
| while (iter.next()) { |
| if (iter.type() == relocInfo::poll_return_type) |
| return true; |
| } |
| return false; |
| } |
| |
| |
| bool nmethod::is_at_poll_or_poll_return(address pc) { |
| RelocIterator iter(this, pc, pc+1); |
| while (iter.next()) { |
| relocInfo::relocType t = iter.type(); |
| if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
| return true; |
| } |
| return false; |
| } |
| |
| |
| void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
| // re-patch all oop-bearing instructions, just in case some oops moved |
| RelocIterator iter(this, begin, end); |
| while (iter.next()) { |
| if (iter.type() == relocInfo::oop_type) { |
| oop_Relocation* reloc = iter.oop_reloc(); |
| if (initialize_immediates && reloc->oop_is_immediate()) { |
| oop* dest = reloc->oop_addr(); |
| initialize_immediate_oop(dest, (jobject) *dest); |
| } |
| // Refresh the oop-related bits of this instruction. |
| reloc->fix_oop_relocation(); |
| } |
| |
| // There must not be any interfering patches or breakpoints. |
| assert(!(iter.type() == relocInfo::breakpoint_type |
| && iter.breakpoint_reloc()->active()), |
| "no active breakpoint"); |
| } |
| } |
| |
| |
| ScopeDesc* nmethod::scope_desc_at(address pc) { |
| PcDesc* pd = pc_desc_at(pc); |
| guarantee(pd != NULL, "scope must be present"); |
| return new ScopeDesc(this, pd->scope_decode_offset(), |
| pd->obj_decode_offset(), pd->should_reexecute(), |
| pd->return_oop()); |
| } |
| |
| |
| void nmethod::clear_inline_caches() { |
| assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); |
| if (is_zombie()) { |
| return; |
| } |
| |
| RelocIterator iter(this); |
| while (iter.next()) { |
| iter.reloc()->clear_inline_cache(); |
| } |
| } |
| |
| |
| void nmethod::cleanup_inline_caches() { |
| |
| assert_locked_or_safepoint(CompiledIC_lock); |
| |
| // If the method is not entrant or zombie then a JMP is plastered over the |
| // first few bytes. If an oop in the old code was there, that oop |
| // should not get GC'd. Skip the first few bytes of oops on |
| // not-entrant methods. |
| address low_boundary = verified_entry_point(); |
| if (!is_in_use()) { |
| low_boundary += NativeJump::instruction_size; |
| // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
| // This means that the low_boundary is going to be a little too high. |
| // This shouldn't matter, since oops of non-entrant methods are never used. |
| // In fact, why are we bothering to look at oops in a non-entrant method?? |
| } |
| |
| // Find all calls in an nmethod, and clear the ones that points to zombie methods |
| ResourceMark rm; |
| RelocIterator iter(this, low_boundary); |
| while(iter.next()) { |
| switch(iter.type()) { |
| case relocInfo::virtual_call_type: |
| case relocInfo::opt_virtual_call_type: { |
| CompiledIC *ic = CompiledIC_at(iter.reloc()); |
| // Ok, to lookup references to zombies here |
| CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); |
| if( cb != NULL && cb->is_nmethod() ) { |
| nmethod* nm = (nmethod*)cb; |
| // Clean inline caches pointing to both zombie and not_entrant methods |
| if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
| } |
| break; |
| } |
| case relocInfo::static_call_type: { |
| CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); |
| CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); |
| if( cb != NULL && cb->is_nmethod() ) { |
| nmethod* nm = (nmethod*)cb; |
| // Clean inline caches pointing to both zombie and not_entrant methods |
| if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| // This is a private interface with the sweeper. |
| void nmethod::mark_as_seen_on_stack() { |
| assert(is_not_entrant(), "must be a non-entrant method"); |
| // Set the traversal mark to ensure that the sweeper does 2 |
| // cleaning passes before moving to zombie. |
| set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
| } |
| |
| // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) |
| bool nmethod::can_not_entrant_be_converted() { |
| assert(is_not_entrant(), "must be a non-entrant method"); |
| |
| // Since the nmethod sweeper only does partial sweep the sweeper's traversal |
| // count can be greater than the stack traversal count before it hits the |
| // nmethod for the second time. |
| return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); |
| } |
| |
| void nmethod::inc_decompile_count() { |
| if (!is_compiled_by_c2()) return; |
| // Could be gated by ProfileTraps, but do not bother... |
| methodOop m = method(); |
| if (m == NULL) return; |
| methodDataOop mdo = m->method_data(); |
| if (mdo == NULL) return; |
| // There is a benign race here. See comments in methodDataOop.hpp. |
| mdo->inc_decompile_count(); |
| } |
| |
| void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { |
| |
| post_compiled_method_unload(); |
| |
| // Since this nmethod is being unloaded, make sure that dependencies |
| // recorded in instanceKlasses get flushed and pass non-NULL closure to |
| // indicate that this work is being done during a GC. |
| assert(Universe::heap()->is_gc_active(), "should only be called during gc"); |
| assert(is_alive != NULL, "Should be non-NULL"); |
| // A non-NULL is_alive closure indicates that this is being called during GC. |
| flush_dependencies(is_alive); |
| |
| // Break cycle between nmethod & method |
| if (TraceClassUnloading && WizardMode) { |
| tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT |
| " unloadable], methodOop(" INTPTR_FORMAT |
| "), cause(" INTPTR_FORMAT ")", |
| this, (address)_method, (address)cause); |
| if (!Universe::heap()->is_gc_active()) |
| cause->klass()->print(); |
| } |
| // Unlink the osr method, so we do not look this up again |
| if (is_osr_method()) { |
| invalidate_osr_method(); |
| } |
| // If _method is already NULL the methodOop is about to be unloaded, |
| // so we don't have to break the cycle. Note that it is possible to |
| // have the methodOop live here, in case we unload the nmethod because |
| // it is pointing to some oop (other than the methodOop) being unloaded. |
| if (_method != NULL) { |
| // OSR methods point to the methodOop, but the methodOop does not |
| // point back! |
| if (_method->code() == this) { |
| _method->clear_code(); // Break a cycle |
| } |
| _method = NULL; // Clear the method of this dead nmethod |
| } |
| // Make the class unloaded - i.e., change state and notify sweeper |
| assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| if (is_in_use()) { |
| // Transitioning directly from live to unloaded -- so |
| // we need to force a cache clean-up; remember this |
| // for later on. |
| CodeCache::set_needs_cache_clean(true); |
| } |
| _state = unloaded; |
| |
| // Log the unloading. |
| log_state_change(); |
| |
| // The methodOop is gone at this point |
| assert(_method == NULL, "Tautology"); |
| |
| set_osr_link(NULL); |
| //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
| NMethodSweeper::notify(this); |
| } |
| |
| void nmethod::invalidate_osr_method() { |
| assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); |
| // Remove from list of active nmethods |
| if (method() != NULL) |
| instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); |
| // Set entry as invalid |
| _entry_bci = InvalidOSREntryBci; |
| } |
| |
| void nmethod::log_state_change() const { |
| if (LogCompilation) { |
| if (xtty != NULL) { |
| ttyLocker ttyl; // keep the following output all in one block |
| if (_state == unloaded) { |
| xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
| os::current_thread_id()); |
| } else { |
| xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
| os::current_thread_id(), |
| (_state == zombie ? " zombie='1'" : "")); |
| } |
| log_identity(xtty); |
| xtty->stamp(); |
| xtty->end_elem(); |
| } |
| } |
| if (PrintCompilation && _state != unloaded) { |
| print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
| tty->cr(); |
| } |
| } |
| |
| // Common functionality for both make_not_entrant and make_zombie |
| bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
| assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
| |
| // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
| nmethodLocker nml(this); |
| methodHandle the_method(method()); |
| No_Safepoint_Verifier nsv; |
| |
| { |
| // If the method is already zombie there is nothing to do |
| if (is_zombie()) { |
| return false; |
| } |
| |
| // invalidate osr nmethod before acquiring the patching lock since |
| // they both acquire leaf locks and we don't want a deadlock. |
| // This logic is equivalent to the logic below for patching the |
| // verified entry point of regular methods. |
| if (is_osr_method()) { |
| // this effectively makes the osr nmethod not entrant |
| invalidate_osr_method(); |
| } |
| |
| // Enter critical section. Does not block for safepoint. |
| MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
| |
| if (_state == state) { |
| // another thread already performed this transition so nothing |
| // to do, but return false to indicate this. |
| return false; |
| } |
| |
| // The caller can be calling the method statically or through an inline |
| // cache call. |
| if (!is_osr_method() && !is_not_entrant()) { |
| NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
| SharedRuntime::get_handle_wrong_method_stub()); |
| } |
| |
| if (is_in_use()) { |
| // It's a true state change, so mark the method as decompiled. |
| // Do it only for transition from alive. |
| inc_decompile_count(); |
| } |
| |
| // Change state |
| _state = state; |
| |
| // Log the transition once |
| log_state_change(); |
| |
| // Remove nmethod from method. |
| // We need to check if both the _code and _from_compiled_code_entry_point |
| // refer to this nmethod because there is a race in setting these two fields |
| // in methodOop as seen in bugid 4947125. |
| // If the vep() points to the zombie nmethod, the memory for the nmethod |
| // could be flushed and the compiler and vtable stubs could still call |
| // through it. |
| if (method() != NULL && (method()->code() == this || |
| method()->from_compiled_entry() == verified_entry_point())) { |
| HandleMark hm; |
| method()->clear_code(); |
| } |
| |
| if (state == not_entrant) { |
| mark_as_seen_on_stack(); |
| } |
| |
| } // leave critical region under Patching_lock |
| |
| // When the nmethod becomes zombie it is no longer alive so the |
| // dependencies must be flushed. nmethods in the not_entrant |
| // state will be flushed later when the transition to zombie |
| // happens or they get unloaded. |
| if (state == zombie) { |
| { |
| // Flushing dependecies must be done before any possible |
| // safepoint can sneak in, otherwise the oops used by the |
| // dependency logic could have become stale. |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| flush_dependencies(NULL); |
| } |
| |
| { |
| // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event |
| // and it hasn't already been reported for this nmethod then report it now. |
| // (the event may have been reported earilier if the GC marked it for unloading). |
| Pause_No_Safepoint_Verifier pnsv(&nsv); |
| post_compiled_method_unload(); |
| } |
| |
| #ifdef ASSERT |
| // It's no longer safe to access the oops section since zombie |
| // nmethods aren't scanned for GC. |
| _oops_are_stale = true; |
| #endif |
| } else { |
| assert(state == not_entrant, "other cases may need to be handled differently"); |
| } |
| |
| if (TraceCreateZombies) { |
| tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); |
| } |
| |
| // Make sweeper aware that there is a zombie method that needs to be removed |
| NMethodSweeper::notify(this); |
| |
| return true; |
| } |
| |
| void nmethod::flush() { |
| // Note that there are no valid oops in the nmethod anymore. |
| assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); |
| assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); |
| |
| assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); |
| assert_locked_or_safepoint(CodeCache_lock); |
| |
| // completely deallocate this method |
| EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); |
| if (PrintMethodFlushing) { |
| tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
| _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); |
| } |
| |
| // We need to deallocate any ExceptionCache data. |
| // Note that we do not need to grab the nmethod lock for this, it |
| // better be thread safe if we're disposing of it! |
| ExceptionCache* ec = exception_cache(); |
| set_exception_cache(NULL); |
| while(ec != NULL) { |
| ExceptionCache* next = ec->next(); |
| delete ec; |
| ec = next; |
| } |
| |
| if (on_scavenge_root_list()) { |
| CodeCache::drop_scavenge_root_nmethod(this); |
| } |
| |
| if (is_speculatively_disconnected()) { |
| CodeCache::remove_saved_code(this); |
| } |
| |
| #ifdef SHARK |
| ((SharkCompiler *) compiler())->free_compiled_method(instructions_begin()); |
| #endif // SHARK |
| |
| ((CodeBlob*)(this))->flush(); |
| |
| CodeCache::free(this); |
| } |
| |
| |
| // |
| // Notify all classes this nmethod is dependent on that it is no |
| // longer dependent. This should only be called in two situations. |
| // First, when a nmethod transitions to a zombie all dependents need |
| // to be clear. Since zombification happens at a safepoint there's no |
| // synchronization issues. The second place is a little more tricky. |
| // During phase 1 of mark sweep class unloading may happen and as a |
| // result some nmethods may get unloaded. In this case the flushing |
| // of dependencies must happen during phase 1 since after GC any |
| // dependencies in the unloaded nmethod won't be updated, so |
| // traversing the dependency information in unsafe. In that case this |
| // function is called with a non-NULL argument and this function only |
| // notifies instanceKlasses that are reachable |
| |
| void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { |
| assert_locked_or_safepoint(CodeCache_lock); |
| assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
| "is_alive is non-NULL if and only if we are called during GC"); |
| if (!has_flushed_dependencies()) { |
| set_has_flushed_dependencies(); |
| for (Dependencies::DepStream deps(this); deps.next(); ) { |
| klassOop klass = deps.context_type(); |
| if (klass == NULL) continue; // ignore things like evol_method |
| |
| // During GC the is_alive closure is non-NULL, and is used to |
| // determine liveness of dependees that need to be updated. |
| if (is_alive == NULL || is_alive->do_object_b(klass)) { |
| instanceKlass::cast(klass)->remove_dependent_nmethod(this); |
| } |
| } |
| } |
| } |
| |
| |
| // If this oop is not live, the nmethod can be unloaded. |
| bool nmethod::can_unload(BoolObjectClosure* is_alive, |
| OopClosure* keep_alive, |
| oop* root, bool unloading_occurred) { |
| assert(root != NULL, "just checking"); |
| oop obj = *root; |
| if (obj == NULL || is_alive->do_object_b(obj)) { |
| return false; |
| } |
| if (obj->is_compiledICHolder()) { |
| compiledICHolderOop cichk_oop = compiledICHolderOop(obj); |
| if (is_alive->do_object_b( |
| cichk_oop->holder_method()->method_holder()) && |
| is_alive->do_object_b(cichk_oop->holder_klass())) { |
| // The oop should be kept alive |
| keep_alive->do_oop(root); |
| return false; |
| } |
| } |
| // If ScavengeRootsInCode is true, an nmethod might be unloaded |
| // simply because one of its constant oops has gone dead. |
| // No actual classes need to be unloaded in order for this to occur. |
| assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
| make_unloaded(is_alive, obj); |
| return true; |
| } |
| |
| // ------------------------------------------------------------------ |
| // post_compiled_method_load_event |
| // new method for install_code() path |
| // Transfer information from compilation to jvmti |
| void nmethod::post_compiled_method_load_event() { |
| |
| methodOop moop = method(); |
| HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
| moop->klass_name()->bytes(), |
| moop->klass_name()->utf8_length(), |
| moop->name()->bytes(), |
| moop->name()->utf8_length(), |
| moop->signature()->bytes(), |
| moop->signature()->utf8_length(), |
| insts_begin(), insts_size()); |
| |
| if (JvmtiExport::should_post_compiled_method_load() || |
| JvmtiExport::should_post_compiled_method_unload()) { |
| get_and_cache_jmethod_id(); |
| } |
| |
| if (JvmtiExport::should_post_compiled_method_load()) { |
| JvmtiExport::post_compiled_method_load(this); |
| } |
| } |
| |
| jmethodID nmethod::get_and_cache_jmethod_id() { |
| if (_jmethod_id == NULL) { |
| // Cache the jmethod_id since it can no longer be looked up once the |
| // method itself has been marked for unloading. |
| _jmethod_id = method()->jmethod_id(); |
| } |
| return _jmethod_id; |
| } |
| |
| void nmethod::post_compiled_method_unload() { |
| if (unload_reported()) { |
| // During unloading we transition to unloaded and then to zombie |
| // and the unloading is reported during the first transition. |
| return; |
| } |
| |
| assert(_method != NULL && !is_unloaded(), "just checking"); |
| DTRACE_METHOD_UNLOAD_PROBE(method()); |
| |
| // If a JVMTI agent has enabled the CompiledMethodUnload event then |
| // post the event. Sometime later this nmethod will be made a zombie |
| // by the sweeper but the methodOop will not be valid at that point. |
| // If the _jmethod_id is null then no load event was ever requested |
| // so don't bother posting the unload. The main reason for this is |
| // that the jmethodID is a weak reference to the methodOop so if |
| // it's being unloaded there's no way to look it up since the weak |
| // ref will have been cleared. |
| if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
| assert(!unload_reported(), "already unloaded"); |
| HandleMark hm; |
| JvmtiExport::post_compiled_method_unload(_jmethod_id, insts_begin()); |
| } |
| |
| // The JVMTI CompiledMethodUnload event can be enabled or disabled at |
| // any time. As the nmethod is being unloaded now we mark it has |
| // having the unload event reported - this will ensure that we don't |
| // attempt to report the event in the unlikely scenario where the |
| // event is enabled at the time the nmethod is made a zombie. |
| set_unload_reported(); |
| } |
| |
| // This is called at the end of the strong tracing/marking phase of a |
| // GC to unload an nmethod if it contains otherwise unreachable |
| // oops. |
| |
| void nmethod::do_unloading(BoolObjectClosure* is_alive, |
| OopClosure* keep_alive, bool unloading_occurred) { |
| // Make sure the oop's ready to receive visitors |
| assert(!is_zombie() && !is_unloaded(), |
| "should not call follow on zombie or unloaded nmethod"); |
| |
| // If the method is not entrant then a JMP is plastered over the |
| // first few bytes. If an oop in the old code was there, that oop |
| // should not get GC'd. Skip the first few bytes of oops on |
| // not-entrant methods. |
| address low_boundary = verified_entry_point(); |
| if (is_not_entrant()) { |
| low_boundary += NativeJump::instruction_size; |
| // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
| // (See comment above.) |
| } |
| |
| // The RedefineClasses() API can cause the class unloading invariant |
| // to no longer be true. See jvmtiExport.hpp for details. |
| // Also, leave a debugging breadcrumb in local flag. |
| bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); |
| if (a_class_was_redefined) { |
| // This set of the unloading_occurred flag is done before the |
| // call to post_compiled_method_unload() so that the unloading |
| // of this nmethod is reported. |
| unloading_occurred = true; |
| } |
| |
| // Follow methodOop |
| if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { |
| return; |
| } |
| |
| // Exception cache |
| ExceptionCache* ec = exception_cache(); |
| while (ec != NULL) { |
| oop* ex_addr = (oop*)ec->exception_type_addr(); |
| oop ex = *ex_addr; |
| ExceptionCache* next_ec = ec->next(); |
| if (ex != NULL && !is_alive->do_object_b(ex)) { |
| assert(!ex->is_compiledICHolder(), "Possible error here"); |
| remove_from_exception_cache(ec); |
| } |
| ec = next_ec; |
| } |
| |
| // If class unloading occurred we first iterate over all inline caches and |
| // clear ICs where the cached oop is referring to an unloaded klass or method. |
| // The remaining live cached oops will be traversed in the relocInfo::oop_type |
| // iteration below. |
| if (unloading_occurred) { |
| RelocIterator iter(this, low_boundary); |
| while(iter.next()) { |
| if (iter.type() == relocInfo::virtual_call_type) { |
| CompiledIC *ic = CompiledIC_at(iter.reloc()); |
| oop ic_oop = ic->cached_oop(); |
| if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { |
| // The only exception is compiledICHolder oops which may |
| // yet be marked below. (We check this further below). |
| if (ic_oop->is_compiledICHolder()) { |
| compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); |
| if (is_alive->do_object_b( |
| cichk_oop->holder_method()->method_holder()) && |
| is_alive->do_object_b(cichk_oop->holder_klass())) { |
| continue; |
| } |
| } |
| ic->set_to_clean(); |
| assert(ic->cached_oop() == NULL, |
| "cached oop in IC should be cleared"); |
| } |
| } |
| } |
| } |
| |
| // Compiled code |
| RelocIterator iter(this, low_boundary); |
| while (iter.next()) { |
| if (iter.type() == relocInfo::oop_type) { |
| oop_Relocation* r = iter.oop_reloc(); |
| // In this loop, we must only traverse those oops directly embedded in |
| // the code. Other oops (oop_index>0) are seen as part of scopes_oops. |
| assert(1 == (r->oop_is_immediate()) + |
| (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), |
| "oop must be found in exactly one place"); |
| if (r->oop_is_immediate() && r->oop_value() != NULL) { |
| if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { |
| return; |
| } |
| } |
| } |
| } |
| |
| |
| // Scopes |
| for (oop* p = oops_begin(); p < oops_end(); p++) { |
| if (*p == Universe::non_oop_word()) continue; // skip non-oops |
| if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { |
| return; |
| } |
| } |
| |
| #ifndef PRODUCT |
| // This nmethod was not unloaded; check below that all CompiledICs |
| // refer to marked oops. |
| { |
| RelocIterator iter(this, low_boundary); |
| while (iter.next()) { |
| if (iter.type() == relocInfo::virtual_call_type) { |
| CompiledIC *ic = CompiledIC_at(iter.reloc()); |
| oop ic_oop = ic->cached_oop(); |
| assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), |
| "Found unmarked ic_oop in reachable nmethod"); |
| } |
| } |
| } |
| #endif // !PRODUCT |
| } |
| |
| // This method is called twice during GC -- once while |
| // tracing the "active" nmethods on thread stacks during |
| // the (strong) marking phase, and then again when walking |
| // the code cache contents during the weak roots processing |
| // phase. The two uses are distinguished by means of the |
| // 'do_strong_roots_only' flag, which is true in the first |
| // case. We want to walk the weak roots in the nmethod |
| // only in the second case. The weak roots in the nmethod |
| // are the oops in the ExceptionCache and the InlineCache |
| // oops. |
| void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
| // make sure the oops ready to receive visitors |
| assert(!is_zombie() && !is_unloaded(), |
| "should not call follow on zombie or unloaded nmethod"); |
| |
| // If the method is not entrant or zombie then a JMP is plastered over the |
| // first few bytes. If an oop in the old code was there, that oop |
| // should not get GC'd. Skip the first few bytes of oops on |
| // not-entrant methods. |
| address low_boundary = verified_entry_point(); |
| if (is_not_entrant()) { |
| low_boundary += NativeJump::instruction_size; |
| // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
| // (See comment above.) |
| } |
| |
| // Compiled code |
| f->do_oop((oop*) &_method); |
| if (!do_strong_roots_only) { |
| // weak roots processing phase -- update ExceptionCache oops |
| ExceptionCache* ec = exception_cache(); |
| while(ec != NULL) { |
| f->do_oop((oop*)ec->exception_type_addr()); |
| ec = ec->next(); |
| } |
| } // Else strong roots phase -- skip oops in ExceptionCache |
| |
| RelocIterator iter(this, low_boundary); |
| |
| while (iter.next()) { |
| if (iter.type() == relocInfo::oop_type ) { |
| oop_Relocation* r = iter.oop_reloc(); |
| // In this loop, we must only follow those oops directly embedded in |
| // the code. Other oops (oop_index>0) are seen as part of scopes_oops. |
| assert(1 == (r->oop_is_immediate()) + |
| (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), |
| "oop must be found in exactly one place"); |
| if (r->oop_is_immediate() && r->oop_value() != NULL) { |
| f->do_oop(r->oop_addr()); |
| } |
| } |
| } |
| |
| // Scopes |
| // This includes oop constants not inlined in the code stream. |
| for (oop* p = oops_begin(); p < oops_end(); p++) { |
| if (*p == Universe::non_oop_word()) continue; // skip non-oops |
| f->do_oop(p); |
| } |
| } |
| |
| #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
| |
| nmethod* volatile nmethod::_oops_do_mark_nmethods; |
| |
| // An nmethod is "marked" if its _mark_link is set non-null. |
| // Even if it is the end of the linked list, it will have a non-null link value, |
| // as long as it is on the list. |
| // This code must be MP safe, because it is used from parallel GC passes. |
| bool nmethod::test_set_oops_do_mark() { |
| assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
| nmethod* observed_mark_link = _oops_do_mark_link; |
| if (observed_mark_link == NULL) { |
| // Claim this nmethod for this thread to mark. |
| observed_mark_link = (nmethod*) |
| Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
| if (observed_mark_link == NULL) { |
| |
| // Atomically append this nmethod (now claimed) to the head of the list: |
| nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
| for (;;) { |
| nmethod* required_mark_nmethods = observed_mark_nmethods; |
| _oops_do_mark_link = required_mark_nmethods; |
| observed_mark_nmethods = (nmethod*) |
| Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
| if (observed_mark_nmethods == required_mark_nmethods) |
| break; |
| } |
| // Mark was clear when we first saw this guy. |
| NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
| return false; |
| } |
| } |
| // On fall through, another racing thread marked this nmethod before we did. |
| return true; |
| } |
| |
| void nmethod::oops_do_marking_prologue() { |
| NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
| assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
| // We use cmpxchg_ptr instead of regular assignment here because the user |
| // may fork a bunch of threads, and we need them all to see the same state. |
| void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
| guarantee(observed == NULL, "no races in this sequential code"); |
| } |
| |
| void nmethod::oops_do_marking_epilogue() { |
| assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
| nmethod* cur = _oops_do_mark_nmethods; |
| while (cur != NMETHOD_SENTINEL) { |
| assert(cur != NULL, "not NULL-terminated"); |
| nmethod* next = cur->_oops_do_mark_link; |
| cur->_oops_do_mark_link = NULL; |
| NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
| cur = next; |
| } |
| void* required = _oops_do_mark_nmethods; |
| void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
| guarantee(observed == required, "no races in this sequential code"); |
| NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
| } |
| |
| class DetectScavengeRoot: public OopClosure { |
| bool _detected_scavenge_root; |
| public: |
| DetectScavengeRoot() : _detected_scavenge_root(false) |
| { NOT_PRODUCT(_print_nm = NULL); } |
| bool detected_scavenge_root() { return _detected_scavenge_root; } |
| virtual void do_oop(oop* p) { |
| if ((*p) != NULL && (*p)->is_scavengable()) { |
| NOT_PRODUCT(maybe_print(p)); |
| _detected_scavenge_root = true; |
| } |
| } |
| virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
| |
| #ifndef PRODUCT |
| nmethod* _print_nm; |
| void maybe_print(oop* p) { |
| if (_print_nm == NULL) return; |
| if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
| tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
| _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
| (intptr_t)(*p), (intptr_t)p); |
| (*p)->print(); |
| } |
| #endif //PRODUCT |
| }; |
| |
| bool nmethod::detect_scavenge_root_oops() { |
| DetectScavengeRoot detect_scavenge_root; |
| NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
| oops_do(&detect_scavenge_root); |
| return detect_scavenge_root.detected_scavenge_root(); |
| } |
| |
| // Method that knows how to preserve outgoing arguments at call. This method must be |
| // called with a frame corresponding to a Java invoke |
| void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { |
| #ifndef SHARK |
| if (!method()->is_native()) { |
| SimpleScopeDesc ssd(this, fr.pc()); |
| Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); |
| bool has_receiver = call->has_receiver(); |
| symbolOop signature = call->signature(); |
| fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
| } |
| #endif // !SHARK |
| } |
| |
| |
| oop nmethod::embeddedOop_at(u_char* p) { |
| RelocIterator iter(this, p, p + oopSize); |
| while (iter.next()) |
| if (iter.type() == relocInfo::oop_type) { |
| return iter.oop_reloc()->oop_value(); |
| } |
| return NULL; |
| } |
| |
| |
| inline bool includes(void* p, void* from, void* to) { |
| return from <= p && p < to; |
| } |
| |
| |
| void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { |
| assert(count >= 2, "must be sentinel values, at least"); |
| |
| #ifdef ASSERT |
| // must be sorted and unique; we do a binary search in find_pc_desc() |
| int prev_offset = pcs[0].pc_offset(); |
| assert(prev_offset == PcDesc::lower_offset_limit, |
| "must start with a sentinel"); |
| for (int i = 1; i < count; i++) { |
| int this_offset = pcs[i].pc_offset(); |
| assert(this_offset > prev_offset, "offsets must be sorted"); |
| prev_offset = this_offset; |
| } |
| assert(prev_offset == PcDesc::upper_offset_limit, |
| "must end with a sentinel"); |
| #endif //ASSERT |
| |
| // Search for MethodHandle invokes and tag the nmethod. |
| for (int i = 0; i < count; i++) { |
| if (pcs[i].is_method_handle_invoke()) { |
| set_has_method_handle_invokes(true); |
| break; |
| } |
| } |
| |
| int size = count * sizeof(PcDesc); |
| assert(scopes_pcs_size() >= size, "oob"); |
| memcpy(scopes_pcs_begin(), pcs, size); |
| |
| // Adjust the final sentinel downward. |
| PcDesc* last_pc = &scopes_pcs_begin()[count-1]; |
| assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); |
| last_pc->set_pc_offset(content_size() + 1); |
| for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
| // Fill any rounding gaps with copies of the last record. |
| last_pc[1] = last_pc[0]; |
| } |
| // The following assert could fail if sizeof(PcDesc) is not |
| // an integral multiple of oopSize (the rounding term). |
| // If it fails, change the logic to always allocate a multiple |
| // of sizeof(PcDesc), and fill unused words with copies of *last_pc. |
| assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); |
| } |
| |
| void nmethod::copy_scopes_data(u_char* buffer, int size) { |
| assert(scopes_data_size() >= size, "oob"); |
| memcpy(scopes_data_begin(), buffer, size); |
| } |
| |
| |
| #ifdef ASSERT |
| static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { |
| PcDesc* lower = nm->scopes_pcs_begin(); |
| PcDesc* upper = nm->scopes_pcs_end(); |
| lower += 1; // exclude initial sentinel |
| PcDesc* res = NULL; |
| for (PcDesc* p = lower; p < upper; p++) { |
| NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc |
| if (match_desc(p, pc_offset, approximate)) { |
| if (res == NULL) |
| res = p; |
| else |
| res = (PcDesc*) badAddress; |
| } |
| } |
| return res; |
| } |
| #endif |
| |
| |
| // Finds a PcDesc with real-pc equal to "pc" |
| PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { |
| address base_address = code_begin(); |
| if ((pc < base_address) || |
| (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { |
| return NULL; // PC is wildly out of range |
| } |
| int pc_offset = (int) (pc - base_address); |
| |
| // Check the PcDesc cache if it contains the desired PcDesc |
| // (This as an almost 100% hit rate.) |
| PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); |
| if (res != NULL) { |
| assert(res == linear_search(this, pc_offset, approximate), "cache ok"); |
| return res; |
| } |
| |
| // Fallback algorithm: quasi-linear search for the PcDesc |
| // Find the last pc_offset less than the given offset. |
| // The successor must be the required match, if there is a match at all. |
| // (Use a fixed radix to avoid expensive affine pointer arithmetic.) |
| PcDesc* lower = scopes_pcs_begin(); |
| PcDesc* upper = scopes_pcs_end(); |
| upper -= 1; // exclude final sentinel |
| if (lower >= upper) return NULL; // native method; no PcDescs at all |
| |
| #define assert_LU_OK \ |
| /* invariant on lower..upper during the following search: */ \ |
| assert(lower->pc_offset() < pc_offset, "sanity"); \ |
| assert(upper->pc_offset() >= pc_offset, "sanity") |
| assert_LU_OK; |
| |
| // Use the last successful return as a split point. |
| PcDesc* mid = _pc_desc_cache.last_pc_desc(); |
| NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
| if (mid->pc_offset() < pc_offset) { |
| lower = mid; |
| } else { |
| upper = mid; |
| } |
| |
| // Take giant steps at first (4096, then 256, then 16, then 1) |
| const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); |
| const int RADIX = (1 << LOG2_RADIX); |
| for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { |
| while ((mid = lower + step) < upper) { |
| assert_LU_OK; |
| NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
| if (mid->pc_offset() < pc_offset) { |
| lower = mid; |
| } else { |
| upper = mid; |
| break; |
| } |
| } |
| assert_LU_OK; |
| } |
| |
| // Sneak up on the value with a linear search of length ~16. |
| while (true) { |
| assert_LU_OK; |
| mid = lower + 1; |
| NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
| if (mid->pc_offset() < pc_offset) { |
| lower = mid; |
| } else { |
| upper = mid; |
| break; |
| } |
| } |
| #undef assert_LU_OK |
| |
| if (match_desc(upper, pc_offset, approximate)) { |
| assert(upper == linear_search(this, pc_offset, approximate), "search ok"); |
| _pc_desc_cache.add_pc_desc(upper); |
| return upper; |
| } else { |
| assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); |
| return NULL; |
| } |
| } |
| |
| |
| bool nmethod::check_all_dependencies() { |
| bool found_check = false; |
| // wholesale check of all dependencies |
| for (Dependencies::DepStream deps(this); deps.next(); ) { |
| if (deps.check_dependency() != NULL) { |
| found_check = true; |
| NOT_DEBUG(break); |
| } |
| } |
| return found_check; // tell caller if we found anything |
| } |
| |
| bool nmethod::check_dependency_on(DepChange& changes) { |
| // What has happened: |
| // 1) a new class dependee has been added |
| // 2) dependee and all its super classes have been marked |
| bool found_check = false; // set true if we are upset |
| for (Dependencies::DepStream deps(this); deps.next(); ) { |
| // Evaluate only relevant dependencies. |
| if (deps.spot_check_dependency_at(changes) != NULL) { |
| found_check = true; |
| NOT_DEBUG(break); |
| } |
| } |
| return found_check; |
| } |
| |
| bool nmethod::is_evol_dependent_on(klassOop dependee) { |
| instanceKlass *dependee_ik = instanceKlass::cast(dependee); |
| objArrayOop dependee_methods = dependee_ik->methods(); |
| for (Dependencies::DepStream deps(this); deps.next(); ) { |
| if (deps.type() == Dependencies::evol_method) { |
| methodOop method = deps.method_argument(0); |
| for (int j = 0; j < dependee_methods->length(); j++) { |
| if ((methodOop) dependee_methods->obj_at(j) == method) { |
| // RC_TRACE macro has an embedded ResourceMark |
| RC_TRACE(0x01000000, |
| ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", |
| _method->method_holder()->klass_part()->external_name(), |
| _method->name()->as_C_string(), |
| _method->signature()->as_C_string(), compile_id(), |
| method->method_holder()->klass_part()->external_name(), |
| method->name()->as_C_string(), |
| method->signature()->as_C_string())); |
| if (TraceDependencies || LogCompilation) |
| deps.log_dependency(dependee); |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| // Called from mark_for_deoptimization, when dependee is invalidated. |
| bool nmethod::is_dependent_on_method(methodOop dependee) { |
| for (Dependencies::DepStream deps(this); deps.next(); ) { |
| if (deps.type() != Dependencies::evol_method) |
| continue; |
| methodOop method = deps.method_argument(0); |
| if (method == dependee) return true; |
| } |
| return false; |
| } |
| |
| |
| bool nmethod::is_patchable_at(address instr_addr) { |
| assert(insts_contains(instr_addr), "wrong nmethod used"); |
| if (is_zombie()) { |
| // a zombie may never be patched |
| return false; |
| } |
| return true; |
| } |
| |
| |
| address nmethod::continuation_for_implicit_exception(address pc) { |
| // Exception happened outside inline-cache check code => we are inside |
| // an active nmethod => use cpc to determine a return address |
| int exception_offset = pc - code_begin(); |
| int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
| #ifdef ASSERT |
| if (cont_offset == 0) { |
| Thread* thread = ThreadLocalStorage::get_thread_slow(); |
| ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY |
| HandleMark hm(thread); |
| ResourceMark rm(thread); |
| CodeBlob* cb = CodeCache::find_blob(pc); |
| assert(cb != NULL && cb == this, ""); |
| tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); |
| print(); |
| method()->print_codes(); |
| print_code(); |
| print_pcs(); |
| } |
| #endif |
| if (cont_offset == 0) { |
| // Let the normal error handling report the exception |
| return NULL; |
| } |
| return code_begin() + cont_offset; |
| } |
| |
| |
| |
| void nmethod_init() { |
| // make sure you didn't forget to adjust the filler fields |
| assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); |
| } |
| |
| |
| //------------------------------------------------------------------------------------------- |
| |
| |
| // QQQ might we make this work from a frame?? |
| nmethodLocker::nmethodLocker(address pc) { |
| CodeBlob* cb = CodeCache::find_blob(pc); |
| guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); |
| _nm = (nmethod*)cb; |
| lock_nmethod(_nm); |
| } |
| |
| void nmethodLocker::lock_nmethod(nmethod* nm) { |
| if (nm == NULL) return; |
| Atomic::inc(&nm->_lock_count); |
| guarantee(!nm->is_zombie(), "cannot lock a zombie method"); |
| } |
| |
| void nmethodLocker::unlock_nmethod(nmethod* nm) { |
| if (nm == NULL) return; |
| Atomic::dec(&nm->_lock_count); |
| guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // nmethod::get_deopt_original_pc |
| // |
| // Return the original PC for the given PC if: |
| // (a) the given PC belongs to a nmethod and |
| // (b) it is a deopt PC |
| address nmethod::get_deopt_original_pc(const frame* fr) { |
| if (fr->cb() == NULL) return NULL; |
| |
| nmethod* nm = fr->cb()->as_nmethod_or_null(); |
| if (nm != NULL && nm->is_deopt_pc(fr->pc())) |
| return nm->get_original_pc(fr); |
| |
| return NULL; |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // MethodHandle |
| |
| bool nmethod::is_method_handle_return(address return_pc) { |
| if (!has_method_handle_invokes()) return false; |
| PcDesc* pd = pc_desc_at(return_pc); |
| if (pd == NULL) |
| return false; |
| return pd->is_method_handle_invoke(); |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Verification |
| |
| class VerifyOopsClosure: public OopClosure { |
| nmethod* _nm; |
| bool _ok; |
| public: |
| VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
| bool ok() { return _ok; } |
| virtual void do_oop(oop* p) { |
| if ((*p) == NULL || (*p)->is_oop()) return; |
| if (_ok) { |
| _nm->print_nmethod(true); |
| _ok = false; |
| } |
| tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
| (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
| } |
| virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
| }; |
| |
| void nmethod::verify() { |
| |
| // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant |
| // seems odd. |
| |
| if( is_zombie() || is_not_entrant() ) |
| return; |
| |
| // Make sure all the entry points are correctly aligned for patching. |
| NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); |
| |
| assert(method()->is_oop(), "must be valid"); |
| |
| ResourceMark rm; |
| |
| if (!CodeCache::contains(this)) { |
| fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
| } |
| |
| if(is_native_method() ) |
| return; |
| |
| nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); |
| if (nm != this) { |
| fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
| this)); |
| } |
| |
| for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
| if (! p->verify(this)) { |
| tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); |
| } |
| } |
| |
| VerifyOopsClosure voc(this); |
| oops_do(&voc); |
| assert(voc.ok(), "embedded oops must be OK"); |
| verify_scavenge_root_oops(); |
| |
| verify_scopes(); |
| } |
| |
| |
| void nmethod::verify_interrupt_point(address call_site) { |
| // This code does not work in release mode since |
| // owns_lock only is available in debug mode. |
| CompiledIC* ic = NULL; |
| Thread *cur = Thread::current(); |
| if (CompiledIC_lock->owner() == cur || |
| ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
| SafepointSynchronize::is_at_safepoint())) { |
| ic = CompiledIC_at(call_site); |
| CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
| } else { |
| MutexLocker ml_verify (CompiledIC_lock); |
| ic = CompiledIC_at(call_site); |
| } |
| PcDesc* pd = pc_desc_at(ic->end_of_call()); |
| assert(pd != NULL, "PcDesc must exist"); |
| for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), |
| pd->obj_decode_offset(), pd->should_reexecute(), |
| pd->return_oop()); |
| !sd->is_top(); sd = sd->sender()) { |
| sd->verify(); |
| } |
| } |
| |
| void nmethod::verify_scopes() { |
| if( !method() ) return; // Runtime stubs have no scope |
| if (method()->is_native()) return; // Ignore stub methods. |
| // iterate through all interrupt point |
| // and verify the debug information is valid. |
| RelocIterator iter((nmethod*)this); |
| while (iter.next()) { |
| address stub = NULL; |
| switch (iter.type()) { |
| case relocInfo::virtual_call_type: |
| verify_interrupt_point(iter.addr()); |
| break; |
| case relocInfo::opt_virtual_call_type: |
| stub = iter.opt_virtual_call_reloc()->static_stub(); |
| verify_interrupt_point(iter.addr()); |
| break; |
| case relocInfo::static_call_type: |
| stub = iter.static_call_reloc()->static_stub(); |
| //verify_interrupt_point(iter.addr()); |
| break; |
| case relocInfo::runtime_call_type: |
| address destination = iter.reloc()->value(); |
| // Right now there is no way to find out which entries support |
| // an interrupt point. It would be nice if we had this |
| // information in a table. |
| break; |
| } |
| assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); |
| } |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Non-product code |
| #ifndef PRODUCT |
| |
| class DebugScavengeRoot: public OopClosure { |
| nmethod* _nm; |
| bool _ok; |
| public: |
| DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
| bool ok() { return _ok; } |
| virtual void do_oop(oop* p) { |
| if ((*p) == NULL || !(*p)->is_scavengable()) return; |
| if (_ok) { |
| _nm->print_nmethod(true); |
| _ok = false; |
| } |
| tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
| (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
| (*p)->print(); |
| } |
| virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
| }; |
| |
| void nmethod::verify_scavenge_root_oops() { |
| if (!on_scavenge_root_list()) { |
| // Actually look inside, to verify the claim that it's clean. |
| DebugScavengeRoot debug_scavenge_root(this); |
| oops_do(&debug_scavenge_root); |
| if (!debug_scavenge_root.ok()) |
| fatal("found an unadvertised bad non-perm oop in the code cache"); |
| } |
| assert(scavenge_root_not_marked(), ""); |
| } |
| |
| #endif // PRODUCT |
| |
| // Printing operations |
| |
| void nmethod::print() const { |
| ResourceMark rm; |
| ttyLocker ttyl; // keep the following output all in one block |
| |
| tty->print("Compiled "); |
| |
| if (is_compiled_by_c1()) { |
| tty->print("(c1) "); |
| } else if (is_compiled_by_c2()) { |
| tty->print("(c2) "); |
| } else if (is_compiled_by_shark()) { |
| tty->print("(shark) "); |
| } else { |
| tty->print("(nm) "); |
| } |
| |
| print_on(tty, "nmethod"); |
| tty->cr(); |
| if (WizardMode) { |
| tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); |
| tty->print(" for method " INTPTR_FORMAT , (address)method()); |
| tty->print(" { "); |
| if (is_in_use()) tty->print("in_use "); |
| if (is_not_entrant()) tty->print("not_entrant "); |
| if (is_zombie()) tty->print("zombie "); |
| if (is_unloaded()) tty->print("unloaded "); |
| if (on_scavenge_root_list()) tty->print("scavenge_root "); |
| tty->print_cr("}:"); |
| } |
| if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| (address)this, |
| (address)this + size(), |
| size()); |
| if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| relocation_begin(), |
| relocation_end(), |
| relocation_size()); |
| if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| consts_begin(), |
| consts_end(), |
| consts_size()); |
| if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| insts_begin(), |
| insts_end(), |
| insts_size()); |
| if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| stub_begin(), |
| stub_end(), |
| stub_size()); |
| if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| oops_begin(), |
| oops_end(), |
| oops_size()); |
| if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| scopes_data_begin(), |
| scopes_data_end(), |
| scopes_data_size()); |
| if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| scopes_pcs_begin(), |
| scopes_pcs_end(), |
| scopes_pcs_size()); |
| if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| dependencies_begin(), |
| dependencies_end(), |
| dependencies_size()); |
| if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| handler_table_begin(), |
| handler_table_end(), |
| handler_table_size()); |
| if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| nul_chk_table_begin(), |
| nul_chk_table_end(), |
| nul_chk_table_size()); |
| } |
| |
| void nmethod::print_code() { |
| HandleMark hm; |
| ResourceMark m; |
| Disassembler::decode(this); |
| } |
| |
| |
| #ifndef PRODUCT |
| |
| void nmethod::print_scopes() { |
| // Find the first pc desc for all scopes in the code and print it. |
| ResourceMark rm; |
| for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
| if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) |
| continue; |
| |
| ScopeDesc* sd = scope_desc_at(p->real_pc(this)); |
| sd->print_on(tty, p); |
| } |
| } |
| |
| void nmethod::print_dependencies() { |
| ResourceMark rm; |
| ttyLocker ttyl; // keep the following output all in one block |
| tty->print_cr("Dependencies:"); |
| for (Dependencies::DepStream deps(this); deps.next(); ) { |
| deps.print_dependency(); |
| klassOop ctxk = deps.context_type(); |
| if (ctxk != NULL) { |
| Klass* k = Klass::cast(ctxk); |
| if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { |
| tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
| } |
| } |
| deps.log_dependency(); // put it into the xml log also |
| } |
| } |
| |
| |
| void nmethod::print_relocations() { |
| ResourceMark m; // in case methods get printed via the debugger |
| tty->print_cr("relocations:"); |
| RelocIterator iter(this); |
| iter.print(); |
| if (UseRelocIndex) { |
| jint* index_end = (jint*)relocation_end() - 1; |
| jint index_size = *index_end; |
| jint* index_start = (jint*)( (address)index_end - index_size ); |
| tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); |
| if (index_size > 0) { |
| jint* ip; |
| for (ip = index_start; ip+2 <= index_end; ip += 2) |
| tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, |
| ip[0], |
| ip[1], |
| header_end()+ip[0], |
| relocation_begin()-1+ip[1]); |
| for (; ip < index_end; ip++) |
| tty->print_cr(" (%d ?)", ip[0]); |
| tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); |
| tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
| } |
| } |
| } |
| |
| |
| void nmethod::print_pcs() { |
| ResourceMark m; // in case methods get printed via debugger |
| tty->print_cr("pc-bytecode offsets:"); |
| for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
| p->print(this); |
| } |
| } |
| |
| #endif // PRODUCT |
| |
| const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { |
| RelocIterator iter(this, begin, end); |
| bool have_one = false; |
| while (iter.next()) { |
| have_one = true; |
| switch (iter.type()) { |
| case relocInfo::none: return "no_reloc"; |
| case relocInfo::oop_type: { |
| stringStream st; |
| oop_Relocation* r = iter.oop_reloc(); |
| oop obj = r->oop_value(); |
| st.print("oop("); |
| if (obj == NULL) st.print("NULL"); |
| else obj->print_value_on(&st); |
| st.print(")"); |
| return st.as_string(); |
| } |
| case relocInfo::virtual_call_type: return "virtual_call"; |
| case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; |
| case relocInfo::static_call_type: return "static_call"; |
| case relocInfo::static_stub_type: return "static_stub"; |
| case relocInfo::runtime_call_type: return "runtime_call"; |
| case relocInfo::external_word_type: return "external_word"; |
| case relocInfo::internal_word_type: return "internal_word"; |
| case relocInfo::section_word_type: return "section_word"; |
| case relocInfo::poll_type: return "poll"; |
| case relocInfo::poll_return_type: return "poll_return"; |
| case relocInfo::type_mask: return "type_bit_mask"; |
| } |
| } |
| return have_one ? "other" : NULL; |
| } |
| |
| // Return a the last scope in (begin..end] |
| ScopeDesc* nmethod::scope_desc_in(address begin, address end) { |
| PcDesc* p = pc_desc_near(begin+1); |
| if (p != NULL && p->real_pc(this) <= end) { |
| return new ScopeDesc(this, p->scope_decode_offset(), |
| p->obj_decode_offset(), p->should_reexecute(), |
| p->return_oop()); |
| } |
| return NULL; |
| } |
| |
| void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
| if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
| if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
| if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
| if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
| if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
| |
| if (has_method_handle_invokes()) |
| if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
| |
| if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
| |
| if (block_begin == entry_point()) { |
| methodHandle m = method(); |
| if (m.not_null()) { |
| stream->print(" # "); |
| m->print_value_on(stream); |
| stream->cr(); |
| } |
| if (m.not_null() && !is_osr_method()) { |
| ResourceMark rm; |
| int sizeargs = m->size_of_parameters(); |
| BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
| VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
| { |
| int sig_index = 0; |
| if (!m->is_static()) |
| sig_bt[sig_index++] = T_OBJECT; // 'this' |
| for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
| BasicType t = ss.type(); |
| sig_bt[sig_index++] = t; |
| if (type2size[t] == 2) { |
| sig_bt[sig_index++] = T_VOID; |
| } else { |
| assert(type2size[t] == 1, "size is 1 or 2"); |
| } |
| } |
| assert(sig_index == sizeargs, ""); |
| } |
| const char* spname = "sp"; // make arch-specific? |
| intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
| int stack_slot_offset = this->frame_size() * wordSize; |
| int tab1 = 14, tab2 = 24; |
| int sig_index = 0; |
| int arg_index = (m->is_static() ? 0 : -1); |
| bool did_old_sp = false; |
| for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
| bool at_this = (arg_index == -1); |
| bool at_old_sp = false; |
| BasicType t = (at_this ? T_OBJECT : ss.type()); |
| assert(t == sig_bt[sig_index], "sigs in sync"); |
| if (at_this) |
| stream->print(" # this: "); |
| else |
| stream->print(" # parm%d: ", arg_index); |
| stream->move_to(tab1); |
| VMReg fst = regs[sig_index].first(); |
| VMReg snd = regs[sig_index].second(); |
| if (fst->is_reg()) { |
| stream->print("%s", fst->name()); |
| if (snd->is_valid()) { |
| stream->print(":%s", snd->name()); |
| } |
| } else if (fst->is_stack()) { |
| int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
| if (offset == stack_slot_offset) at_old_sp = true; |
| stream->print("[%s+0x%x]", spname, offset); |
| } else { |
| stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
| } |
| stream->print(" "); |
| stream->move_to(tab2); |
| stream->print("= "); |
| if (at_this) { |
| m->method_holder()->print_value_on(stream); |
| } else { |
| bool did_name = false; |
| if (!at_this && ss.is_object()) { |
| symbolOop name = ss.as_symbol_or_null(); |
| if (name != NULL) { |
| name->print_value_on(stream); |
| did_name = true; |
| } |
| } |
| if (!did_name) |
| stream->print("%s", type2name(t)); |
| } |
| if (at_old_sp) { |
| stream->print(" (%s of caller)", spname); |
| did_old_sp = true; |
| } |
| stream->cr(); |
| sig_index += type2size[t]; |
| arg_index += 1; |
| if (!at_this) ss.next(); |
| } |
| if (!did_old_sp) { |
| stream->print(" # "); |
| stream->move_to(tab1); |
| stream->print("[%s+0x%x]", spname, stack_slot_offset); |
| stream->print(" (%s of caller)", spname); |
| stream->cr(); |
| } |
| } |
| } |
| } |
| |
| void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
| // First, find an oopmap in (begin, end]. |
| // We use the odd half-closed interval so that oop maps and scope descs |
| // which are tied to the byte after a call are printed with the call itself. |
| address base = code_begin(); |
| OopMapSet* oms = oop_maps(); |
| if (oms != NULL) { |
| for (int i = 0, imax = oms->size(); i < imax; i++) { |
| OopMap* om = oms->at(i); |
| address pc = base + om->offset(); |
| if (pc > begin) { |
| if (pc <= end) { |
| st->move_to(column); |
| st->print("; "); |
| om->print_on(st); |
| } |
| break; |
| } |
| } |
| } |
| |
| // Print any debug info present at this pc. |
| ScopeDesc* sd = scope_desc_in(begin, end); |
| if (sd != NULL) { |
| st->move_to(column); |
| if (sd->bci() == SynchronizationEntryBCI) { |
| st->print(";*synchronization entry"); |
| } else { |
| if (sd->method().is_null()) { |
| st->print("method is NULL"); |
| } else if (sd->method()->is_native()) { |
| st->print("method is native"); |
| } else { |
| address bcp = sd->method()->bcp_from(sd->bci()); |
| Bytecodes::Code bc = Bytecodes::java_code_at(bcp); |
| st->print(";*%s", Bytecodes::name(bc)); |
| switch (bc) { |
| case Bytecodes::_invokevirtual: |
| case Bytecodes::_invokespecial: |
| case Bytecodes::_invokestatic: |
| case Bytecodes::_invokeinterface: |
| { |
| Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); |
| st->print(" "); |
| if (invoke->name() != NULL) |
| invoke->name()->print_symbol_on(st); |
| else |
| st->print("<UNKNOWN>"); |
| break; |
| } |
| case Bytecodes::_getfield: |
| case Bytecodes::_putfield: |
| case Bytecodes::_getstatic: |
| case Bytecodes::_putstatic: |
| { |
| Bytecode_field* field = Bytecode_field_at(sd->method(), sd->bci()); |
| st->print(" "); |
| if (field->name() != NULL) |
| field->name()->print_symbol_on(st); |
| else |
| st->print("<UNKNOWN>"); |
| } |
| } |
| } |
| } |
| |
| // Print all scopes |
| for (;sd != NULL; sd = sd->sender()) { |
| st->move_to(column); |
| st->print("; -"); |
| if (sd->method().is_null()) { |
| st->print("method is NULL"); |
| } else { |
| sd->method()->print_short_name(st); |
| } |
| int lineno = sd->method()->line_number_from_bci(sd->bci()); |
| if (lineno != -1) { |
| st->print("@%d (line %d)", sd->bci(), lineno); |
| } else { |
| st->print("@%d", sd->bci()); |
| } |
| st->cr(); |
| } |
| } |
| |
| // Print relocation information |
| const char* str = reloc_string_for(begin, end); |
| if (str != NULL) { |
| if (sd != NULL) st->cr(); |
| st->move_to(column); |
| st->print("; {%s}", str); |
| } |
| int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
| if (cont_offset != 0) { |
| st->move_to(column); |
| st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
| } |
| |
| } |
| |
| #ifndef PRODUCT |
| |
| void nmethod::print_value_on(outputStream* st) const { |
| print_on(st, "nmethod"); |
| } |
| |
| void nmethod::print_calls(outputStream* st) { |
| RelocIterator iter(this); |
| while (iter.next()) { |
| switch (iter.type()) { |
| case relocInfo::virtual_call_type: |
| case relocInfo::opt_virtual_call_type: { |
| VerifyMutexLocker mc(CompiledIC_lock); |
| CompiledIC_at(iter.reloc())->print(); |
| break; |
| } |
| case relocInfo::static_call_type: |
| st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); |
| compiledStaticCall_at(iter.reloc())->print(); |
| break; |
| } |
| } |
| } |
| |
| void nmethod::print_handler_table() { |
| ExceptionHandlerTable(this).print(); |
| } |
| |
| void nmethod::print_nul_chk_table() { |
| ImplicitExceptionTable(this).print(code_begin()); |
| } |
| |
| void nmethod::print_statistics() { |
| ttyLocker ttyl; |
| if (xtty != NULL) xtty->head("statistics type='nmethod'"); |
| nmethod_stats.print_native_nmethod_stats(); |
| nmethod_stats.print_nmethod_stats(); |
| DebugInformationRecorder::print_statistics(); |
| nmethod_stats.print_pc_stats(); |
| Dependencies::print_statistics(); |
| if (xtty != NULL) xtty->tail("statistics"); |
| } |
| |
| #endif // PRODUCT |