Mercurial > hg > truffle
diff src/share/vm/code/nmethod.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 65a06b4a51b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/code/nmethod.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,2216 @@ +/* + * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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 (is_native_method()) return false; + assert(compiler() != NULL, "must be"); + return compiler()->is_c1(); +} +bool nmethod::is_compiled_by_c2() const { + if (is_native_method()) return false; + assert(compiler() != NULL, "must be"); + return compiler()->is_c2(); +} + + + +//--------------------------------------------------------------------------------- +// 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 code_size; + int stub_size; + int consts_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(); + code_size += nm->code_size(); + stub_size += nm->stub_size(); + consts_size += nm->consts_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(); + oops_size += nm->oops_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 (code_size != 0) tty->print_cr(" main code = %d", code_size); + if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); + if (consts_size != 0) tty->print_cr(" constants = %d", consts_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); + if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); + } + + int native_nmethod_count; + int native_total_size; + int native_relocation_size; + int native_code_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_code_size += nm->code_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_code_size != 0) tty->print_cr(" N. main code = %d", native_code_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 dont 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-------------- + + +void nmFlags::clear() { + assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags"); + *(jint*)this = 0; +} + +int nmethod::total_size() const { + return + code_size() + + stub_size() + + consts_size() + + scopes_data_size() + + scopes_pcs_size() + + handler_table_size() + + nul_chk_table_size(); +} + +const char* nmethod::compile_kind() const { + if (method() == NULL) return "unloaded"; + if (is_native_method()) return "c2n"; + if (is_osr_method()) return "osr"; + return NULL; +} + +// %%% This variable is no longer used? +int nmethod::_zombie_instruction_size = NativeJump::instruction_size; + + +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)); + const int dummy = -1; // Flag to force proper "operator new" + 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; +} + +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); + + NOT_PRODUCT(_has_debug_info = false; ) + _method = method; + _entry_bci = InvocationEntryBci; + _link = NULL; + _compiler = NULL; + // 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; + _orig_pc_offset = 0; + _stub_offset = data_offset(); + _consts_offset = data_offset(); + _scopes_data_offset = data_offset(); + _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 = instructions_begin(); + _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); + _osr_entry_point = NULL; + _exception_cache = NULL; + _pc_desc_cache.reset_to(NULL); + + flags.clear(); + flags.state = alive; + _markedForDeoptimization = 0; + + _lock_count = 0; + _stack_traversal_mark = 0; + + code_buffer->copy_oops_to(this); + debug_only(check_store();) + CodeCache::commit(this); + VTune::create_nmethod(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); +} + + +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); + + NOT_PRODUCT(_has_debug_info = false; ) + _method = method; + _compile_id = compile_id; + _comp_level = comp_level; + _entry_bci = entry_bci; + _link = NULL; + _compiler = compiler; + _orig_pc_offset = orig_pc_offset; + _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); + + // 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); + _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); + _scopes_data_offset = data_offset(); + _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 = instructions_begin(); + _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); + _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); + _exception_cache = NULL; + _pc_desc_cache.reset_to(scopes_pcs_begin()); + + flags.clear(); + flags.state = alive; + _markedForDeoptimization = 0; + + _unload_reported = false; // jvmti state + + _lock_count = 0; + _stack_traversal_mark = 0; + + // Copy contents of ScopeDescRecorder to nmethod + code_buffer->copy_oops_to(this); + debug_info->copy_to(this); + dependencies->copy_to(this); + debug_only(check_store();) + + CodeCache::commit(this); + + VTune::create_nmethod(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::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()); + } +#ifdef TIERED + log->print(" level='%d'", comp_level()); +#endif // TIERED +} + + +#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'", + instructions_begin(), size()); + xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); + + LOG_OFFSET(xtty, relocation); + LOG_OFFSET(xtty, code); + LOG_OFFSET(xtty, stub); + LOG_OFFSET(xtty, consts); + 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 + + +// 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 a little tag line that looks like +PrintCompilation output: + st->print("%3d%c %s", + compile_id(), + is_osr_method() ? '%' : + method() != NULL && + is_native_method() ? 'n' : ' ', + title); +#ifdef TIERED + st->print(" (%d) ", comp_level()); +#endif // TIERED + if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); + if (method() != NULL) { + method()->print_short_name(st); + if (is_osr_method()) + st->print(" @ %d", osr_entry_bci()); + if (method()->code_size() > 0) + st->print(" (%d bytes)", method()->code_size()); + } + } +} + + +#ifndef PRODUCT +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"); + } +} +#endif + + +void nmethod::set_version(int v) { + flags.version = v; +} + + +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()); +} + + +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(SafepointSynchronize::is_at_safepoint() && + !CompiledIC_lock->is_locked() && + !Patching_lock->is_locked(), "no threads must be updating the inline caches by them selfs"); + + // 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()) 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()) csc->set_to_clean(); + } + break; + } + } + } +} + +void nmethod::mark_as_seen_on_stack() { + assert(is_not_entrant(), "must be a non-entrant method"); + 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"); + assert(SafepointSynchronize::is_at_safepoint(), "must be called during a safepoint"); + + // 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() { + // 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); + cause->klass()->print(); + } + // 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 + } + inc_decompile_count(); // Last chance to make a mark on the MDO + _method = NULL; // Clear the method of this dead nmethod + } + // Make the class unloaded - i.e., change state and notify sweeper + check_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); + } + flags.state = unloaded; + + // The methodOop is gone at this point + assert(_method == NULL, "Tautology"); + + set_link(NULL); + NMethodSweeper::notify(this); +} + +void nmethod::invalidate_osr_method() { + assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); + if (_entry_bci != InvalidOSREntryBci) + inc_decompile_count(); + // 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(int state) const { + if (LogCompilation) { + if (xtty != NULL) { + ttyLocker ttyl; // keep the following output all in one block + xtty->begin_elem("make_not_entrant %sthread='" UINTX_FORMAT "'", + (state == zombie ? "zombie='1' " : ""), + os::current_thread_id()); + log_identity(xtty); + xtty->stamp(); + xtty->end_elem(); + } + } + if (PrintCompilation) { + print_on(tty, state == zombie ? "made zombie " : "made not entrant "); + tty->cr(); + } +} + +// Common functionality for both make_not_entrant and make_zombie +void nmethod::make_not_entrant_or_zombie(int state) { + assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); + + // Code for an on-stack-replacement nmethod is removed when a class gets unloaded. + // They never become zombie/non-entrant, so the nmethod sweeper will never remove + // them. Instead the entry_bci is set to InvalidOSREntryBci, so the osr nmethod + // will never be used anymore. That the nmethods only gets removed when class unloading + // happens, make life much simpler, since the nmethods are not just going to disappear + // out of the blue. + if (is_osr_only_method()) { + if (osr_entry_bci() != InvalidOSREntryBci) { + // only log this once + log_state_change(state); + } + invalidate_osr_method(); + return; + } + + // If the method is already zombie or set to the state we want, nothing to do + if (is_zombie() || (state == not_entrant && is_not_entrant())) { + return; + } + + log_state_change(state); + + // Make sure the nmethod is not flushed in case of a safepoint in code below. + nmethodLocker nml(this); + + { + // Enter critical section. Does not block for safepoint. + MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); + // The caller can be calling the method statically or through an inline + // cache call. + if (!is_not_entrant()) { + NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), + SharedRuntime::get_handle_wrong_method_stub()); + assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, ""); + } + + // 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) { + assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); + flush_dependencies(NULL); + } else { + assert(state == not_entrant, "other cases may need to be handled differently"); + } + + // Change state + flags.state = state; + } // leave critical region under Patching_lock + + if (state == not_entrant) { + Events::log("Make nmethod not entrant " INTPTR_FORMAT, this); + } else { + Events::log("Make nmethod zombie " INTPTR_FORMAT, this); + } + + 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); + + // not_entrant only stuff + if (state == not_entrant) { + mark_as_seen_on_stack(); + } + + // It's a true state change, so mark the method as decompiled. + inc_decompile_count(); + + + // 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). + if (state == zombie) { + + DTRACE_METHOD_UNLOAD_PROBE(method()); + + if (JvmtiExport::should_post_compiled_method_unload() && + !unload_reported()) { + assert(method() != NULL, "checking"); + { + HandleMark hm; + JvmtiExport::post_compiled_method_unload_at_safepoint( + method()->jmethod_id(), code_begin()); + } + set_unload_reported(); + } + } + + + // Zombie only stuff + if (state == zombie) { + VTune::delete_nmethod(this); + } + + // Check whether method got unloaded at a safepoint before this, + // if so we can skip the flushing steps below + if (method() == NULL) return; + + // 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()->code() == this || + method()->from_compiled_entry() == verified_entry_point()) { + HandleMark hm; + method()->clear_code(); + } +} + + +#ifndef PRODUCT +void nmethod::check_safepoint() { + assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); +} +#endif + + +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"); + check_safepoint(); + + // completely deallocate this method + EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); + if (PrintMethodFlushing) { + tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs()); + } + + // 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; + } + + ((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(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); + 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 (!UseParallelOldGC || !VerifyParallelOldWithMarkSweep) { + // Cannot do this test if verification of the UseParallelOldGC + // code using the PSMarkSweep code is being done. + assert(unloading_occurred, "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(), + code_begin(), code_size()); + + if (JvmtiExport::should_post_compiled_method_load()) { + JvmtiExport::post_compiled_method_load(this); + } +} + +void nmethod::post_compiled_method_unload() { + 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 (JvmtiExport::should_post_compiled_method_unload()) { + assert(!unload_reported(), "already unloaded"); + HandleMark hm; + JvmtiExport::post_compiled_method_unload_at_safepoint( + method()->jmethod_id(), code_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 +} + +void nmethod::oops_do(OopClosure* f) { + // 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); + ExceptionCache* ec = exception_cache(); + while(ec != NULL) { + f->do_oop((oop*)ec->exception_type_addr()); + ec = ec->next(); + } + + 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 + for (oop* p = oops_begin(); p < oops_end(); p++) { + if (*p == Universe::non_oop_word()) continue; // skip non-oops + f->do_oop(p); + } +} + +// 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) { + if (!method()->is_native()) { + SimpleScopeDesc ssd(this, fr.pc()); + Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); + bool is_static = call->is_invokestatic(); + symbolOop signature = call->signature(); + fr.oops_compiled_arguments_do(signature, is_static, reg_map, f); + } +} + + +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 + + 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(instructions_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 = instructions_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 (code_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 - instructions_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 + guarantee(cont_offset != 0, "unhandled implicit exception in compiled code"); + return instructions_begin() + cont_offset; +} + + + +void nmethod_init() { + // make sure you didn't forget to adjust the filler fields + assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word"); + 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"); +} + +bool nmethod::is_deopt_pc(address pc) { + bool ret = pc == deopt_handler_begin(); + return ret; +} + + +// ----------------------------------------------------------------------------- +// Verification + +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)) { + fatal1("nmethod at " INTPTR_FORMAT " not in zone", this); + } + + if(is_native_method() ) + return; + + nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); + if (nm != this) { + fatal1("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); + } + } + + 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()); + !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 + +void nmethod::check_store() { + // Make sure all oops in the compiled code are tenured + + RelocIterator iter(this); + while (iter.next()) { + if (iter.type() == relocInfo::oop_type) { + oop_Relocation* reloc = iter.oop_reloc(); + oop obj = reloc->oop_value(); + if (obj != NULL && !obj->is_perm()) { + fatal("must be permanent oop in compiled code"); + } + } + } +} + + +// 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 { + assert(is_native_method(), "Who 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 (version()) tty->print("v%d ", version()); + if (level()) tty->print("l%d ", level()); + 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 "); + 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 (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", + code_begin(), + code_end(), + code_size()); + if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", + stub_begin(), + stub_end(), + stub_size()); + if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", + consts_begin(), + consts_end(), + consts_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()); + if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", + oops_begin(), + oops_end(), + oops_size()); +} + + +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(" [nmethod<=klass]%s", k->external_name()); + } + } + deps.log_dependency(); // put it into the xml log also + } +} + + +void nmethod::print_code() { + HandleMark hm; + ResourceMark m; + Disassembler().decode(this); +} + + +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); + } +} + + +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()); + } + return NULL; +} + +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 = instructions_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->fill_to(column); + if (st == tty) { + st->print("; OopMap "); + om->print(); + tty->cr(); + } else { + st->print_cr("; OopMap #%d offset:%d", i, om->offset()); + } + } + break; + } + } + } + ScopeDesc* sd = scope_desc_in(begin, end); + if (sd != NULL) { + st->fill_to(column); + if (sd->bci() == SynchronizationEntryBCI) { + st->print(";*synchronization entry"); + } else { + if (sd->method().is_null()) { + tty->print("method is NULL"); + } else if (sd->method()->is_native()) { + tty->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: + { + methodHandle sdm = sd->method(); + Bytecode_field* field = Bytecode_field_at(sdm(), sdm->bcp_from(sd->bci())); + constantPoolOop sdmc = sdm->constants(); + symbolOop name = sdmc->name_ref_at(field->index()); + st->print(" "); + if (name != NULL) + name->print_symbol_on(st); + else + st->print("<UNKNOWN>"); + } + } + } + } + st->cr(); + // Print all scopes + for (;sd != NULL; sd = sd->sender()) { + st->fill_to(column); + st->print("; -"); + if (sd->method().is_null()) { + tty->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->fill_to(column); + st->print("; {%s}", str); + } + int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); + if (cont_offset != 0) { + st->fill_to(column); + st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); + } + +} + +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(instructions_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