author | jrose |
Wed, 02 Apr 2008 12:09:59 -0700 | |
changeset 347 | df859fcca515 |
parent 203 | 2e348cc9121a |
child 363 | 99d43e8a76ad |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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# include "incls/_precompiled.incl" |
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# include "incls/_nmethod.cpp.incl" |
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#ifdef DTRACE_ENABLED |
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// Only bother with this argument setup if dtrace is available |
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HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
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const char*, int, const char*, int, const char*, int, void*, size_t); |
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HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, |
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char*, int, char*, int, char*, int); |
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#define DTRACE_METHOD_UNLOAD_PROBE(method) \ |
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{ \ |
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methodOop m = (method); \ |
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if (m != NULL) { \ |
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symbolOop klass_name = m->klass_name(); \ |
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symbolOop name = m->name(); \ |
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symbolOop signature = m->signature(); \ |
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HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
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klass_name->bytes(), klass_name->utf8_length(), \ |
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name->bytes(), name->utf8_length(), \ |
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signature->bytes(), signature->utf8_length()); \ |
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} \ |
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} |
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#else // ndef DTRACE_ENABLED |
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#define DTRACE_METHOD_UNLOAD_PROBE(method) |
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#endif |
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58 |
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bool nmethod::is_compiled_by_c1() const { |
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if (is_native_method()) return false; |
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assert(compiler() != NULL, "must be"); |
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return compiler()->is_c1(); |
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} |
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bool nmethod::is_compiled_by_c2() const { |
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if (is_native_method()) return false; |
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assert(compiler() != NULL, "must be"); |
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return compiler()->is_c2(); |
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} |
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//--------------------------------------------------------------------------------- |
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// NMethod statistics |
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// They are printed under various flags, including: |
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// PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. |
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// (In the latter two cases, they like other stats are printed to the log only.) |
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#ifndef PRODUCT |
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// These variables are put into one block to reduce relocations |
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// and make it simpler to print from the debugger. |
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static |
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struct nmethod_stats_struct { |
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int nmethod_count; |
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int total_size; |
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int relocation_size; |
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int code_size; |
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int stub_size; |
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int consts_size; |
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int scopes_data_size; |
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int scopes_pcs_size; |
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int dependencies_size; |
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int handler_table_size; |
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int nul_chk_table_size; |
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int oops_size; |
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void note_nmethod(nmethod* nm) { |
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nmethod_count += 1; |
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total_size += nm->size(); |
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relocation_size += nm->relocation_size(); |
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code_size += nm->code_size(); |
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stub_size += nm->stub_size(); |
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consts_size += nm->consts_size(); |
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scopes_data_size += nm->scopes_data_size(); |
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scopes_pcs_size += nm->scopes_pcs_size(); |
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dependencies_size += nm->dependencies_size(); |
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handler_table_size += nm->handler_table_size(); |
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nul_chk_table_size += nm->nul_chk_table_size(); |
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oops_size += nm->oops_size(); |
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} |
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void print_nmethod_stats() { |
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if (nmethod_count == 0) return; |
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tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); |
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if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); |
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if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); |
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if (code_size != 0) tty->print_cr(" main code = %d", code_size); |
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if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
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if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
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if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); |
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if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); |
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if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); |
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if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); |
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if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
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} |
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int native_nmethod_count; |
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int native_total_size; |
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int native_relocation_size; |
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int native_code_size; |
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int native_oops_size; |
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void note_native_nmethod(nmethod* nm) { |
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native_nmethod_count += 1; |
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native_total_size += nm->size(); |
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native_relocation_size += nm->relocation_size(); |
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native_code_size += nm->code_size(); |
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native_oops_size += nm->oops_size(); |
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} |
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void print_native_nmethod_stats() { |
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if (native_nmethod_count == 0) return; |
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tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); |
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if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); |
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if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); |
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if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); |
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if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
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} |
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int pc_desc_resets; // number of resets (= number of caches) |
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int pc_desc_queries; // queries to nmethod::find_pc_desc |
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int pc_desc_approx; // number of those which have approximate true |
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int pc_desc_repeats; // number of _last_pc_desc hits |
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int pc_desc_hits; // number of LRU cache hits |
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int pc_desc_tests; // total number of PcDesc examinations |
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int pc_desc_searches; // total number of quasi-binary search steps |
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int pc_desc_adds; // number of LUR cache insertions |
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void print_pc_stats() { |
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tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", |
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pc_desc_queries, |
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(double)(pc_desc_tests + pc_desc_searches) |
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/ pc_desc_queries); |
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tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", |
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pc_desc_resets, |
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pc_desc_queries, pc_desc_approx, |
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pc_desc_repeats, pc_desc_hits, |
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pc_desc_tests, pc_desc_searches, pc_desc_adds); |
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} |
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} nmethod_stats; |
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#endif //PRODUCT |
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//--------------------------------------------------------------------------------- |
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// The _unwind_handler is a special marker address, which says that |
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// for given exception oop and address, the frame should be removed |
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// as the tuple cannot be caught in the nmethod |
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address ExceptionCache::_unwind_handler = (address) -1; |
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ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { |
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assert(pc != NULL, "Must be non null"); |
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assert(exception.not_null(), "Must be non null"); |
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assert(handler != NULL, "Must be non null"); |
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_count = 0; |
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_exception_type = exception->klass(); |
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_next = NULL; |
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add_address_and_handler(pc,handler); |
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} |
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address ExceptionCache::match(Handle exception, address pc) { |
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assert(pc != NULL,"Must be non null"); |
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assert(exception.not_null(),"Must be non null"); |
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if (exception->klass() == exception_type()) { |
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return (test_address(pc)); |
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} |
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return NULL; |
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} |
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bool ExceptionCache::match_exception_with_space(Handle exception) { |
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assert(exception.not_null(),"Must be non null"); |
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if (exception->klass() == exception_type() && count() < cache_size) { |
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return true; |
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} |
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return false; |
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} |
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address ExceptionCache::test_address(address addr) { |
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for (int i=0; i<count(); i++) { |
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if (pc_at(i) == addr) { |
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return handler_at(i); |
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} |
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} |
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return NULL; |
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} |
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bool ExceptionCache::add_address_and_handler(address addr, address handler) { |
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if (test_address(addr) == handler) return true; |
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if (count() < cache_size) { |
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set_pc_at(count(),addr); |
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set_handler_at(count(), handler); |
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increment_count(); |
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return true; |
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} |
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return false; |
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} |
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// private method for handling exception cache |
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// These methods are private, and used to manipulate the exception cache |
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// directly. |
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ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { |
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ExceptionCache* ec = exception_cache(); |
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while (ec != NULL) { |
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if (ec->match_exception_with_space(exception)) { |
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return ec; |
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} |
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ec = ec->next(); |
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} |
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return NULL; |
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} |
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//----------------------------------------------------------------------------- |
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// Helper used by both find_pc_desc methods. |
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static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { |
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NOT_PRODUCT(++nmethod_stats.pc_desc_tests); |
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if (!approximate) |
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return pc->pc_offset() == pc_offset; |
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else |
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return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); |
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} |
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void PcDescCache::reset_to(PcDesc* initial_pc_desc) { |
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if (initial_pc_desc == NULL) { |
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_last_pc_desc = NULL; // native method |
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return; |
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} |
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NOT_PRODUCT(++nmethod_stats.pc_desc_resets); |
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// reset the cache by filling it with benign (non-null) values |
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assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); |
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_last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel |
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for (int i = 0; i < cache_size; i++) |
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_pc_descs[i] = initial_pc_desc; |
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} |
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PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { |
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NOT_PRODUCT(++nmethod_stats.pc_desc_queries); |
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NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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// In order to prevent race conditions do not load cache elements |
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// repeatedly, but use a local copy: |
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PcDesc* res; |
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281 |
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// Step one: Check the most recently returned value. |
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res = _last_pc_desc; |
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if (res == NULL) return NULL; // native method; no PcDescs at all |
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if (match_desc(res, pc_offset, approximate)) { |
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NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); |
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return res; |
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} |
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289 |
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// Step two: Check the LRU cache. |
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for (int i = 0; i < cache_size; i++) { |
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res = _pc_descs[i]; |
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if (res->pc_offset() < 0) break; // optimization: skip empty cache |
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if (match_desc(res, pc_offset, approximate)) { |
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NOT_PRODUCT(++nmethod_stats.pc_desc_hits); |
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_last_pc_desc = res; // record this cache hit in case of repeat |
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return res; |
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} |
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} |
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300 |
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// Report failure. |
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return NULL; |
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} |
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304 |
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305 |
void PcDescCache::add_pc_desc(PcDesc* pc_desc) { |
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NOT_PRODUCT(++nmethod_stats.pc_desc_adds); |
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// Update the LRU cache by shifting pc_desc forward: |
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308 |
for (int i = 0; i < cache_size; i++) { |
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309 |
PcDesc* next = _pc_descs[i]; |
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310 |
_pc_descs[i] = pc_desc; |
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pc_desc = next; |
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} |
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// Note: Do not update _last_pc_desc. It fronts for the LRU cache. |
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} |
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315 |
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316 |
// adjust pcs_size so that it is a multiple of both oopSize and |
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317 |
// sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple |
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318 |
// of oopSize, then 2*sizeof(PcDesc) is) |
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319 |
static int adjust_pcs_size(int pcs_size) { |
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320 |
int nsize = round_to(pcs_size, oopSize); |
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321 |
if ((nsize % sizeof(PcDesc)) != 0) { |
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nsize = pcs_size + sizeof(PcDesc); |
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} |
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324 |
assert((nsize % oopSize) == 0, "correct alignment"); |
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return nsize; |
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326 |
} |
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327 |
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328 |
//----------------------------------------------------------------------------- |
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329 |
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330 |
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331 |
void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { |
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332 |
assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); |
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333 |
assert(new_entry != NULL,"Must be non null"); |
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334 |
assert(new_entry->next() == NULL, "Must be null"); |
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335 |
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336 |
if (exception_cache() != NULL) { |
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337 |
new_entry->set_next(exception_cache()); |
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338 |
} |
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339 |
set_exception_cache(new_entry); |
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340 |
} |
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341 |
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342 |
void nmethod::remove_from_exception_cache(ExceptionCache* ec) { |
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343 |
ExceptionCache* prev = NULL; |
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344 |
ExceptionCache* curr = exception_cache(); |
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345 |
assert(curr != NULL, "nothing to remove"); |
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346 |
// find the previous and next entry of ec |
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347 |
while (curr != ec) { |
|
348 |
prev = curr; |
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349 |
curr = curr->next(); |
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350 |
assert(curr != NULL, "ExceptionCache not found"); |
|
351 |
} |
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352 |
// now: curr == ec |
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353 |
ExceptionCache* next = curr->next(); |
|
354 |
if (prev == NULL) { |
|
355 |
set_exception_cache(next); |
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356 |
} else { |
|
357 |
prev->set_next(next); |
|
358 |
} |
|
359 |
delete curr; |
|
360 |
} |
|
361 |
||
362 |
||
363 |
// public method for accessing the exception cache |
|
364 |
// These are the public access methods. |
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365 |
address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { |
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366 |
// We never grab a lock to read the exception cache, so we may |
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367 |
// have false negatives. This is okay, as it can only happen during |
|
368 |
// the first few exception lookups for a given nmethod. |
|
369 |
ExceptionCache* ec = exception_cache(); |
|
370 |
while (ec != NULL) { |
|
371 |
address ret_val; |
|
372 |
if ((ret_val = ec->match(exception,pc)) != NULL) { |
|
373 |
return ret_val; |
|
374 |
} |
|
375 |
ec = ec->next(); |
|
376 |
} |
|
377 |
return NULL; |
|
378 |
} |
|
379 |
||
380 |
||
381 |
void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { |
|
382 |
// There are potential race conditions during exception cache updates, so we |
|
383 |
// must own the ExceptionCache_lock before doing ANY modifications. Because |
|
384 |
// we dont lock during reads, it is possible to have several threads attempt |
|
385 |
// to update the cache with the same data. We need to check for already inserted |
|
386 |
// copies of the current data before adding it. |
|
387 |
||
388 |
MutexLocker ml(ExceptionCache_lock); |
|
389 |
ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); |
|
390 |
||
391 |
if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { |
|
392 |
target_entry = new ExceptionCache(exception,pc,handler); |
|
393 |
add_exception_cache_entry(target_entry); |
|
394 |
} |
|
395 |
} |
|
396 |
||
397 |
||
398 |
//-------------end of code for ExceptionCache-------------- |
|
399 |
||
400 |
||
401 |
void nmFlags::clear() { |
|
402 |
assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags"); |
|
403 |
*(jint*)this = 0; |
|
404 |
} |
|
405 |
||
406 |
int nmethod::total_size() const { |
|
407 |
return |
|
408 |
code_size() + |
|
409 |
stub_size() + |
|
410 |
consts_size() + |
|
411 |
scopes_data_size() + |
|
412 |
scopes_pcs_size() + |
|
413 |
handler_table_size() + |
|
414 |
nul_chk_table_size(); |
|
415 |
} |
|
416 |
||
417 |
const char* nmethod::compile_kind() const { |
|
418 |
if (method() == NULL) return "unloaded"; |
|
419 |
if (is_native_method()) return "c2n"; |
|
420 |
if (is_osr_method()) return "osr"; |
|
421 |
return NULL; |
|
422 |
} |
|
423 |
||
424 |
// %%% This variable is no longer used? |
|
425 |
int nmethod::_zombie_instruction_size = NativeJump::instruction_size; |
|
426 |
||
427 |
||
428 |
nmethod* nmethod::new_native_nmethod(methodHandle method, |
|
429 |
CodeBuffer *code_buffer, |
|
430 |
int vep_offset, |
|
431 |
int frame_complete, |
|
432 |
int frame_size, |
|
433 |
ByteSize basic_lock_owner_sp_offset, |
|
434 |
ByteSize basic_lock_sp_offset, |
|
435 |
OopMapSet* oop_maps) { |
|
436 |
// create nmethod |
|
437 |
nmethod* nm = NULL; |
|
438 |
{ |
|
439 |
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
|
440 |
int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
|
441 |
const int dummy = -1; // Flag to force proper "operator new" |
|
442 |
CodeOffsets offsets; |
|
443 |
offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
|
444 |
offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
|
445 |
nm = new (native_nmethod_size) |
|
446 |
nmethod(method(), native_nmethod_size, &offsets, |
|
447 |
code_buffer, frame_size, |
|
448 |
basic_lock_owner_sp_offset, basic_lock_sp_offset, |
|
449 |
oop_maps); |
|
450 |
NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
|
451 |
if (PrintAssembly && nm != NULL) |
|
452 |
Disassembler::decode(nm); |
|
453 |
} |
|
454 |
// verify nmethod |
|
455 |
debug_only(if (nm) nm->verify();) // might block |
|
456 |
||
457 |
if (nm != NULL) { |
|
458 |
nm->log_new_nmethod(); |
|
459 |
} |
|
460 |
||
461 |
return nm; |
|
462 |
} |
|
463 |
||
464 |
nmethod* nmethod::new_nmethod(methodHandle method, |
|
465 |
int compile_id, |
|
466 |
int entry_bci, |
|
467 |
CodeOffsets* offsets, |
|
468 |
int orig_pc_offset, |
|
469 |
DebugInformationRecorder* debug_info, |
|
470 |
Dependencies* dependencies, |
|
471 |
CodeBuffer* code_buffer, int frame_size, |
|
472 |
OopMapSet* oop_maps, |
|
473 |
ExceptionHandlerTable* handler_table, |
|
474 |
ImplicitExceptionTable* nul_chk_table, |
|
475 |
AbstractCompiler* compiler, |
|
476 |
int comp_level |
|
477 |
) |
|
478 |
{ |
|
479 |
assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); |
|
480 |
// create nmethod |
|
481 |
nmethod* nm = NULL; |
|
482 |
{ MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
|
483 |
int nmethod_size = |
|
484 |
allocation_size(code_buffer, sizeof(nmethod)) |
|
485 |
+ adjust_pcs_size(debug_info->pcs_size()) |
|
486 |
+ round_to(dependencies->size_in_bytes() , oopSize) |
|
487 |
+ round_to(handler_table->size_in_bytes(), oopSize) |
|
488 |
+ round_to(nul_chk_table->size_in_bytes(), oopSize) |
|
489 |
+ round_to(debug_info->data_size() , oopSize); |
|
490 |
nm = new (nmethod_size) |
|
491 |
nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
|
492 |
orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
|
493 |
oop_maps, |
|
494 |
handler_table, |
|
495 |
nul_chk_table, |
|
496 |
compiler, |
|
497 |
comp_level); |
|
498 |
if (nm != NULL) { |
|
499 |
// To make dependency checking during class loading fast, record |
|
500 |
// the nmethod dependencies in the classes it is dependent on. |
|
501 |
// This allows the dependency checking code to simply walk the |
|
502 |
// class hierarchy above the loaded class, checking only nmethods |
|
503 |
// which are dependent on those classes. The slow way is to |
|
504 |
// check every nmethod for dependencies which makes it linear in |
|
505 |
// the number of methods compiled. For applications with a lot |
|
506 |
// classes the slow way is too slow. |
|
507 |
for (Dependencies::DepStream deps(nm); deps.next(); ) { |
|
508 |
klassOop klass = deps.context_type(); |
|
509 |
if (klass == NULL) continue; // ignore things like evol_method |
|
510 |
||
511 |
// record this nmethod as dependent on this klass |
|
512 |
instanceKlass::cast(klass)->add_dependent_nmethod(nm); |
|
513 |
} |
|
514 |
} |
|
515 |
NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
|
516 |
if (PrintAssembly && nm != NULL) |
|
517 |
Disassembler::decode(nm); |
|
518 |
} |
|
519 |
||
520 |
// verify nmethod |
|
521 |
debug_only(if (nm) nm->verify();) // might block |
|
522 |
||
523 |
if (nm != NULL) { |
|
524 |
nm->log_new_nmethod(); |
|
525 |
} |
|
526 |
||
527 |
// done |
|
528 |
return nm; |
|
529 |
} |
|
530 |
||
531 |
||
532 |
// For native wrappers |
|
533 |
nmethod::nmethod( |
|
534 |
methodOop method, |
|
535 |
int nmethod_size, |
|
536 |
CodeOffsets* offsets, |
|
537 |
CodeBuffer* code_buffer, |
|
538 |
int frame_size, |
|
539 |
ByteSize basic_lock_owner_sp_offset, |
|
540 |
ByteSize basic_lock_sp_offset, |
|
541 |
OopMapSet* oop_maps ) |
|
542 |
: CodeBlob("native nmethod", code_buffer, sizeof(nmethod), |
|
543 |
nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), |
|
544 |
_compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), |
|
545 |
_compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) |
|
546 |
{ |
|
547 |
{ |
|
548 |
debug_only(No_Safepoint_Verifier nsv;) |
|
549 |
assert_locked_or_safepoint(CodeCache_lock); |
|
550 |
||
551 |
NOT_PRODUCT(_has_debug_info = false; ) |
|
552 |
_method = method; |
|
553 |
_entry_bci = InvocationEntryBci; |
|
554 |
_link = NULL; |
|
555 |
_compiler = NULL; |
|
556 |
// We have no exception handler or deopt handler make the |
|
557 |
// values something that will never match a pc like the nmethod vtable entry |
|
558 |
_exception_offset = 0; |
|
559 |
_deoptimize_offset = 0; |
|
560 |
_orig_pc_offset = 0; |
|
561 |
_stub_offset = data_offset(); |
|
562 |
_consts_offset = data_offset(); |
|
563 |
_scopes_data_offset = data_offset(); |
|
564 |
_scopes_pcs_offset = _scopes_data_offset; |
|
565 |
_dependencies_offset = _scopes_pcs_offset; |
|
566 |
_handler_table_offset = _dependencies_offset; |
|
567 |
_nul_chk_table_offset = _handler_table_offset; |
|
568 |
_nmethod_end_offset = _nul_chk_table_offset; |
|
569 |
_compile_id = 0; // default |
|
570 |
_comp_level = CompLevel_none; |
|
571 |
_entry_point = instructions_begin(); |
|
572 |
_verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
|
573 |
_osr_entry_point = NULL; |
|
574 |
_exception_cache = NULL; |
|
575 |
_pc_desc_cache.reset_to(NULL); |
|
576 |
||
577 |
flags.clear(); |
|
578 |
flags.state = alive; |
|
579 |
_markedForDeoptimization = 0; |
|
580 |
||
581 |
_lock_count = 0; |
|
582 |
_stack_traversal_mark = 0; |
|
583 |
||
584 |
code_buffer->copy_oops_to(this); |
|
585 |
debug_only(check_store();) |
|
586 |
CodeCache::commit(this); |
|
587 |
VTune::create_nmethod(this); |
|
588 |
} |
|
589 |
||
590 |
if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
|
591 |
ttyLocker ttyl; // keep the following output all in one block |
|
592 |
// This output goes directly to the tty, not the compiler log. |
|
593 |
// To enable tools to match it up with the compilation activity, |
|
594 |
// be sure to tag this tty output with the compile ID. |
|
595 |
if (xtty != NULL) { |
|
596 |
xtty->begin_head("print_native_nmethod"); |
|
597 |
xtty->method(_method); |
|
598 |
xtty->stamp(); |
|
599 |
xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
|
600 |
} |
|
601 |
// print the header part first |
|
602 |
print(); |
|
603 |
// then print the requested information |
|
604 |
if (PrintNativeNMethods) { |
|
605 |
print_code(); |
|
606 |
oop_maps->print(); |
|
607 |
} |
|
608 |
if (PrintRelocations) { |
|
609 |
print_relocations(); |
|
610 |
} |
|
611 |
if (xtty != NULL) { |
|
612 |
xtty->tail("print_native_nmethod"); |
|
613 |
} |
|
614 |
} |
|
615 |
Events::log("Create nmethod " INTPTR_FORMAT, this); |
|
616 |
} |
|
617 |
||
618 |
||
619 |
void* nmethod::operator new(size_t size, int nmethod_size) { |
|
620 |
// Always leave some room in the CodeCache for I2C/C2I adapters |
|
621 |
if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; |
|
622 |
return CodeCache::allocate(nmethod_size); |
|
623 |
} |
|
624 |
||
625 |
||
626 |
nmethod::nmethod( |
|
627 |
methodOop method, |
|
628 |
int nmethod_size, |
|
629 |
int compile_id, |
|
630 |
int entry_bci, |
|
631 |
CodeOffsets* offsets, |
|
632 |
int orig_pc_offset, |
|
633 |
DebugInformationRecorder* debug_info, |
|
634 |
Dependencies* dependencies, |
|
635 |
CodeBuffer *code_buffer, |
|
636 |
int frame_size, |
|
637 |
OopMapSet* oop_maps, |
|
638 |
ExceptionHandlerTable* handler_table, |
|
639 |
ImplicitExceptionTable* nul_chk_table, |
|
640 |
AbstractCompiler* compiler, |
|
641 |
int comp_level |
|
642 |
) |
|
643 |
: CodeBlob("nmethod", code_buffer, sizeof(nmethod), |
|
644 |
nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), |
|
645 |
_compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
|
646 |
_compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
|
647 |
{ |
|
648 |
assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); |
|
649 |
{ |
|
650 |
debug_only(No_Safepoint_Verifier nsv;) |
|
651 |
assert_locked_or_safepoint(CodeCache_lock); |
|
652 |
||
653 |
NOT_PRODUCT(_has_debug_info = false; ) |
|
654 |
_method = method; |
|
655 |
_compile_id = compile_id; |
|
656 |
_comp_level = comp_level; |
|
657 |
_entry_bci = entry_bci; |
|
658 |
_link = NULL; |
|
659 |
_compiler = compiler; |
|
660 |
_orig_pc_offset = orig_pc_offset; |
|
661 |
_stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); |
|
662 |
||
663 |
// Exception handler and deopt handler are in the stub section |
|
664 |
_exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
|
665 |
_deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); |
|
666 |
_consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); |
|
667 |
_scopes_data_offset = data_offset(); |
|
668 |
_scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
|
669 |
_dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
|
670 |
_handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); |
|
671 |
_nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); |
|
672 |
_nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); |
|
673 |
||
674 |
_entry_point = instructions_begin(); |
|
675 |
_verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
|
676 |
_osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); |
|
677 |
_exception_cache = NULL; |
|
678 |
_pc_desc_cache.reset_to(scopes_pcs_begin()); |
|
679 |
||
680 |
flags.clear(); |
|
681 |
flags.state = alive; |
|
682 |
_markedForDeoptimization = 0; |
|
683 |
||
684 |
_unload_reported = false; // jvmti state |
|
685 |
||
686 |
_lock_count = 0; |
|
687 |
_stack_traversal_mark = 0; |
|
688 |
||
689 |
// Copy contents of ScopeDescRecorder to nmethod |
|
690 |
code_buffer->copy_oops_to(this); |
|
691 |
debug_info->copy_to(this); |
|
692 |
dependencies->copy_to(this); |
|
693 |
debug_only(check_store();) |
|
694 |
||
695 |
CodeCache::commit(this); |
|
696 |
||
697 |
VTune::create_nmethod(this); |
|
698 |
||
699 |
// Copy contents of ExceptionHandlerTable to nmethod |
|
700 |
handler_table->copy_to(this); |
|
701 |
nul_chk_table->copy_to(this); |
|
702 |
||
703 |
// we use the information of entry points to find out if a method is |
|
704 |
// static or non static |
|
705 |
assert(compiler->is_c2() || |
|
706 |
_method->is_static() == (entry_point() == _verified_entry_point), |
|
707 |
" entry points must be same for static methods and vice versa"); |
|
708 |
} |
|
709 |
||
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
710 |
bool printnmethods = PrintNMethods |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
711 |
|| CompilerOracle::should_print(_method) |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
712 |
|| CompilerOracle::has_option_string(_method, "PrintNMethods"); |
1 | 713 |
if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
714 |
print_nmethod(printnmethods); |
|
715 |
} |
|
716 |
||
717 |
// Note: Do not verify in here as the CodeCache_lock is |
|
718 |
// taken which would conflict with the CompiledIC_lock |
|
719 |
// which taken during the verification of call sites. |
|
720 |
// (was bug - gri 10/25/99) |
|
721 |
||
722 |
Events::log("Create nmethod " INTPTR_FORMAT, this); |
|
723 |
} |
|
724 |
||
725 |
||
726 |
// Print a short set of xml attributes to identify this nmethod. The |
|
727 |
// output should be embedded in some other element. |
|
728 |
void nmethod::log_identity(xmlStream* log) const { |
|
729 |
log->print(" compile_id='%d'", compile_id()); |
|
730 |
const char* nm_kind = compile_kind(); |
|
731 |
if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); |
|
732 |
if (compiler() != NULL) { |
|
733 |
log->print(" compiler='%s'", compiler()->name()); |
|
734 |
} |
|
735 |
#ifdef TIERED |
|
736 |
log->print(" level='%d'", comp_level()); |
|
737 |
#endif // TIERED |
|
738 |
} |
|
739 |
||
740 |
||
741 |
#define LOG_OFFSET(log, name) \ |
|
742 |
if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ |
|
743 |
log->print(" " XSTR(name) "_offset='%d'" , \ |
|
744 |
(intptr_t)name##_begin() - (intptr_t)this) |
|
745 |
||
746 |
||
747 |
void nmethod::log_new_nmethod() const { |
|
748 |
if (LogCompilation && xtty != NULL) { |
|
749 |
ttyLocker ttyl; |
|
750 |
HandleMark hm; |
|
751 |
xtty->begin_elem("nmethod"); |
|
752 |
log_identity(xtty); |
|
753 |
xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", |
|
754 |
instructions_begin(), size()); |
|
755 |
xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
|
756 |
||
757 |
LOG_OFFSET(xtty, relocation); |
|
758 |
LOG_OFFSET(xtty, code); |
|
759 |
LOG_OFFSET(xtty, stub); |
|
760 |
LOG_OFFSET(xtty, consts); |
|
761 |
LOG_OFFSET(xtty, scopes_data); |
|
762 |
LOG_OFFSET(xtty, scopes_pcs); |
|
763 |
LOG_OFFSET(xtty, dependencies); |
|
764 |
LOG_OFFSET(xtty, handler_table); |
|
765 |
LOG_OFFSET(xtty, nul_chk_table); |
|
766 |
LOG_OFFSET(xtty, oops); |
|
767 |
||
768 |
xtty->method(method()); |
|
769 |
xtty->stamp(); |
|
770 |
xtty->end_elem(); |
|
771 |
} |
|
772 |
} |
|
773 |
||
774 |
#undef LOG_OFFSET |
|
775 |
||
776 |
||
777 |
// Print out more verbose output usually for a newly created nmethod. |
|
778 |
void nmethod::print_on(outputStream* st, const char* title) const { |
|
779 |
if (st != NULL) { |
|
780 |
ttyLocker ttyl; |
|
781 |
// Print a little tag line that looks like +PrintCompilation output: |
|
782 |
st->print("%3d%c %s", |
|
783 |
compile_id(), |
|
784 |
is_osr_method() ? '%' : |
|
785 |
method() != NULL && |
|
786 |
is_native_method() ? 'n' : ' ', |
|
787 |
title); |
|
788 |
#ifdef TIERED |
|
789 |
st->print(" (%d) ", comp_level()); |
|
790 |
#endif // TIERED |
|
791 |
if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
|
792 |
if (method() != NULL) { |
|
793 |
method()->print_short_name(st); |
|
794 |
if (is_osr_method()) |
|
795 |
st->print(" @ %d", osr_entry_bci()); |
|
796 |
if (method()->code_size() > 0) |
|
797 |
st->print(" (%d bytes)", method()->code_size()); |
|
798 |
} |
|
799 |
} |
|
800 |
} |
|
801 |
||
802 |
||
803 |
void nmethod::print_nmethod(bool printmethod) { |
|
804 |
ttyLocker ttyl; // keep the following output all in one block |
|
805 |
if (xtty != NULL) { |
|
806 |
xtty->begin_head("print_nmethod"); |
|
807 |
xtty->stamp(); |
|
808 |
xtty->end_head(); |
|
809 |
} |
|
810 |
// print the header part first |
|
811 |
print(); |
|
812 |
// then print the requested information |
|
813 |
if (printmethod) { |
|
814 |
print_code(); |
|
815 |
print_pcs(); |
|
816 |
oop_maps()->print(); |
|
817 |
} |
|
818 |
if (PrintDebugInfo) { |
|
819 |
print_scopes(); |
|
820 |
} |
|
821 |
if (PrintRelocations) { |
|
822 |
print_relocations(); |
|
823 |
} |
|
824 |
if (PrintDependencies) { |
|
825 |
print_dependencies(); |
|
826 |
} |
|
827 |
if (PrintExceptionHandlers) { |
|
828 |
print_handler_table(); |
|
829 |
print_nul_chk_table(); |
|
830 |
} |
|
831 |
if (xtty != NULL) { |
|
832 |
xtty->tail("print_nmethod"); |
|
833 |
} |
|
834 |
} |
|
835 |
||
836 |
||
837 |
void nmethod::set_version(int v) { |
|
838 |
flags.version = v; |
|
839 |
} |
|
840 |
||
841 |
||
842 |
ScopeDesc* nmethod::scope_desc_at(address pc) { |
|
843 |
PcDesc* pd = pc_desc_at(pc); |
|
844 |
guarantee(pd != NULL, "scope must be present"); |
|
845 |
return new ScopeDesc(this, pd->scope_decode_offset(), |
|
846 |
pd->obj_decode_offset()); |
|
847 |
} |
|
848 |
||
849 |
||
850 |
void nmethod::clear_inline_caches() { |
|
851 |
assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); |
|
852 |
if (is_zombie()) { |
|
853 |
return; |
|
854 |
} |
|
855 |
||
856 |
RelocIterator iter(this); |
|
857 |
while (iter.next()) { |
|
858 |
iter.reloc()->clear_inline_cache(); |
|
859 |
} |
|
860 |
} |
|
861 |
||
862 |
||
863 |
void nmethod::cleanup_inline_caches() { |
|
864 |
||
865 |
assert(SafepointSynchronize::is_at_safepoint() && |
|
866 |
!CompiledIC_lock->is_locked() && |
|
867 |
!Patching_lock->is_locked(), "no threads must be updating the inline caches by them selfs"); |
|
868 |
||
869 |
// If the method is not entrant or zombie then a JMP is plastered over the |
|
870 |
// first few bytes. If an oop in the old code was there, that oop |
|
871 |
// should not get GC'd. Skip the first few bytes of oops on |
|
872 |
// not-entrant methods. |
|
873 |
address low_boundary = verified_entry_point(); |
|
874 |
if (!is_in_use()) { |
|
875 |
low_boundary += NativeJump::instruction_size; |
|
876 |
// %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
|
877 |
// This means that the low_boundary is going to be a little too high. |
|
878 |
// This shouldn't matter, since oops of non-entrant methods are never used. |
|
879 |
// In fact, why are we bothering to look at oops in a non-entrant method?? |
|
880 |
} |
|
881 |
||
882 |
// Find all calls in an nmethod, and clear the ones that points to zombie methods |
|
883 |
ResourceMark rm; |
|
884 |
RelocIterator iter(this, low_boundary); |
|
885 |
while(iter.next()) { |
|
886 |
switch(iter.type()) { |
|
887 |
case relocInfo::virtual_call_type: |
|
888 |
case relocInfo::opt_virtual_call_type: { |
|
889 |
CompiledIC *ic = CompiledIC_at(iter.reloc()); |
|
890 |
// Ok, to lookup references to zombies here |
|
891 |
CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); |
|
892 |
if( cb != NULL && cb->is_nmethod() ) { |
|
893 |
nmethod* nm = (nmethod*)cb; |
|
894 |
// Clean inline caches pointing to both zombie and not_entrant methods |
|
895 |
if (!nm->is_in_use()) ic->set_to_clean(); |
|
896 |
} |
|
897 |
break; |
|
898 |
} |
|
899 |
case relocInfo::static_call_type: { |
|
900 |
CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); |
|
901 |
CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); |
|
902 |
if( cb != NULL && cb->is_nmethod() ) { |
|
903 |
nmethod* nm = (nmethod*)cb; |
|
904 |
// Clean inline caches pointing to both zombie and not_entrant methods |
|
905 |
if (!nm->is_in_use()) csc->set_to_clean(); |
|
906 |
} |
|
907 |
break; |
|
908 |
} |
|
909 |
} |
|
910 |
} |
|
911 |
} |
|
912 |
||
913 |
void nmethod::mark_as_seen_on_stack() { |
|
914 |
assert(is_not_entrant(), "must be a non-entrant method"); |
|
915 |
set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
|
916 |
} |
|
917 |
||
918 |
// Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) |
|
919 |
bool nmethod::can_not_entrant_be_converted() { |
|
920 |
assert(is_not_entrant(), "must be a non-entrant method"); |
|
921 |
assert(SafepointSynchronize::is_at_safepoint(), "must be called during a safepoint"); |
|
922 |
||
923 |
// Since the nmethod sweeper only does partial sweep the sweeper's traversal |
|
924 |
// count can be greater than the stack traversal count before it hits the |
|
925 |
// nmethod for the second time. |
|
926 |
return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); |
|
927 |
} |
|
928 |
||
929 |
void nmethod::inc_decompile_count() { |
|
930 |
// Could be gated by ProfileTraps, but do not bother... |
|
931 |
methodOop m = method(); |
|
932 |
if (m == NULL) return; |
|
933 |
methodDataOop mdo = m->method_data(); |
|
934 |
if (mdo == NULL) return; |
|
935 |
// There is a benign race here. See comments in methodDataOop.hpp. |
|
936 |
mdo->inc_decompile_count(); |
|
937 |
} |
|
938 |
||
939 |
void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { |
|
940 |
||
941 |
post_compiled_method_unload(); |
|
942 |
||
943 |
// Since this nmethod is being unloaded, make sure that dependencies |
|
944 |
// recorded in instanceKlasses get flushed and pass non-NULL closure to |
|
945 |
// indicate that this work is being done during a GC. |
|
946 |
assert(Universe::heap()->is_gc_active(), "should only be called during gc"); |
|
947 |
assert(is_alive != NULL, "Should be non-NULL"); |
|
948 |
// A non-NULL is_alive closure indicates that this is being called during GC. |
|
949 |
flush_dependencies(is_alive); |
|
950 |
||
951 |
// Break cycle between nmethod & method |
|
952 |
if (TraceClassUnloading && WizardMode) { |
|
953 |
tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT |
|
954 |
" unloadable], methodOop(" INTPTR_FORMAT |
|
955 |
"), cause(" INTPTR_FORMAT ")", |
|
956 |
this, (address)_method, (address)cause); |
|
957 |
cause->klass()->print(); |
|
958 |
} |
|
959 |
// If _method is already NULL the methodOop is about to be unloaded, |
|
960 |
// so we don't have to break the cycle. Note that it is possible to |
|
961 |
// have the methodOop live here, in case we unload the nmethod because |
|
962 |
// it is pointing to some oop (other than the methodOop) being unloaded. |
|
963 |
if (_method != NULL) { |
|
964 |
// OSR methods point to the methodOop, but the methodOop does not |
|
965 |
// point back! |
|
966 |
if (_method->code() == this) { |
|
967 |
_method->clear_code(); // Break a cycle |
|
968 |
} |
|
969 |
inc_decompile_count(); // Last chance to make a mark on the MDO |
|
970 |
_method = NULL; // Clear the method of this dead nmethod |
|
971 |
} |
|
972 |
// Make the class unloaded - i.e., change state and notify sweeper |
|
973 |
check_safepoint(); |
|
974 |
if (is_in_use()) { |
|
975 |
// Transitioning directly from live to unloaded -- so |
|
976 |
// we need to force a cache clean-up; remember this |
|
977 |
// for later on. |
|
978 |
CodeCache::set_needs_cache_clean(true); |
|
979 |
} |
|
980 |
flags.state = unloaded; |
|
981 |
||
982 |
// The methodOop is gone at this point |
|
983 |
assert(_method == NULL, "Tautology"); |
|
984 |
||
985 |
set_link(NULL); |
|
986 |
NMethodSweeper::notify(this); |
|
987 |
} |
|
988 |
||
989 |
void nmethod::invalidate_osr_method() { |
|
990 |
assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); |
|
991 |
if (_entry_bci != InvalidOSREntryBci) |
|
992 |
inc_decompile_count(); |
|
993 |
// Remove from list of active nmethods |
|
994 |
if (method() != NULL) |
|
995 |
instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); |
|
996 |
// Set entry as invalid |
|
997 |
_entry_bci = InvalidOSREntryBci; |
|
998 |
} |
|
999 |
||
1000 |
void nmethod::log_state_change(int state) const { |
|
1001 |
if (LogCompilation) { |
|
1002 |
if (xtty != NULL) { |
|
1003 |
ttyLocker ttyl; // keep the following output all in one block |
|
1004 |
xtty->begin_elem("make_not_entrant %sthread='" UINTX_FORMAT "'", |
|
1005 |
(state == zombie ? "zombie='1' " : ""), |
|
1006 |
os::current_thread_id()); |
|
1007 |
log_identity(xtty); |
|
1008 |
xtty->stamp(); |
|
1009 |
xtty->end_elem(); |
|
1010 |
} |
|
1011 |
} |
|
1012 |
if (PrintCompilation) { |
|
1013 |
print_on(tty, state == zombie ? "made zombie " : "made not entrant "); |
|
1014 |
tty->cr(); |
|
1015 |
} |
|
1016 |
} |
|
1017 |
||
1018 |
// Common functionality for both make_not_entrant and make_zombie |
|
1019 |
void nmethod::make_not_entrant_or_zombie(int state) { |
|
1020 |
assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
|
1021 |
||
1022 |
// Code for an on-stack-replacement nmethod is removed when a class gets unloaded. |
|
1023 |
// They never become zombie/non-entrant, so the nmethod sweeper will never remove |
|
1024 |
// them. Instead the entry_bci is set to InvalidOSREntryBci, so the osr nmethod |
|
1025 |
// will never be used anymore. That the nmethods only gets removed when class unloading |
|
1026 |
// happens, make life much simpler, since the nmethods are not just going to disappear |
|
1027 |
// out of the blue. |
|
1028 |
if (is_osr_only_method()) { |
|
1029 |
if (osr_entry_bci() != InvalidOSREntryBci) { |
|
1030 |
// only log this once |
|
1031 |
log_state_change(state); |
|
1032 |
} |
|
1033 |
invalidate_osr_method(); |
|
1034 |
return; |
|
1035 |
} |
|
1036 |
||
1037 |
// If the method is already zombie or set to the state we want, nothing to do |
|
1038 |
if (is_zombie() || (state == not_entrant && is_not_entrant())) { |
|
1039 |
return; |
|
1040 |
} |
|
1041 |
||
1042 |
log_state_change(state); |
|
1043 |
||
1044 |
// Make sure the nmethod is not flushed in case of a safepoint in code below. |
|
1045 |
nmethodLocker nml(this); |
|
1046 |
||
1047 |
{ |
|
1048 |
// Enter critical section. Does not block for safepoint. |
|
1049 |
MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
|
1050 |
// The caller can be calling the method statically or through an inline |
|
1051 |
// cache call. |
|
1052 |
if (!is_not_entrant()) { |
|
1053 |
NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
|
1054 |
SharedRuntime::get_handle_wrong_method_stub()); |
|
1055 |
assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, ""); |
|
1056 |
} |
|
1057 |
||
1058 |
// When the nmethod becomes zombie it is no longer alive so the |
|
1059 |
// dependencies must be flushed. nmethods in the not_entrant |
|
1060 |
// state will be flushed later when the transition to zombie |
|
1061 |
// happens or they get unloaded. |
|
1062 |
if (state == zombie) { |
|
1063 |
assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); |
|
1064 |
flush_dependencies(NULL); |
|
1065 |
} else { |
|
1066 |
assert(state == not_entrant, "other cases may need to be handled differently"); |
|
1067 |
} |
|
1068 |
||
1069 |
// Change state |
|
1070 |
flags.state = state; |
|
1071 |
} // leave critical region under Patching_lock |
|
1072 |
||
1073 |
if (state == not_entrant) { |
|
1074 |
Events::log("Make nmethod not entrant " INTPTR_FORMAT, this); |
|
1075 |
} else { |
|
1076 |
Events::log("Make nmethod zombie " INTPTR_FORMAT, this); |
|
1077 |
} |
|
1078 |
||
1079 |
if (TraceCreateZombies) { |
|
1080 |
tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); |
|
1081 |
} |
|
1082 |
||
1083 |
// Make sweeper aware that there is a zombie method that needs to be removed |
|
1084 |
NMethodSweeper::notify(this); |
|
1085 |
||
1086 |
// not_entrant only stuff |
|
1087 |
if (state == not_entrant) { |
|
1088 |
mark_as_seen_on_stack(); |
|
1089 |
} |
|
1090 |
||
1091 |
// It's a true state change, so mark the method as decompiled. |
|
1092 |
inc_decompile_count(); |
|
1093 |
||
1094 |
||
1095 |
// zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event |
|
1096 |
// and it hasn't already been reported for this nmethod then report it now. |
|
1097 |
// (the event may have been reported earilier if the GC marked it for unloading). |
|
1098 |
if (state == zombie) { |
|
1099 |
||
1100 |
DTRACE_METHOD_UNLOAD_PROBE(method()); |
|
1101 |
||
1102 |
if (JvmtiExport::should_post_compiled_method_unload() && |
|
1103 |
!unload_reported()) { |
|
1104 |
assert(method() != NULL, "checking"); |
|
1105 |
{ |
|
1106 |
HandleMark hm; |
|
1107 |
JvmtiExport::post_compiled_method_unload_at_safepoint( |
|
1108 |
method()->jmethod_id(), code_begin()); |
|
1109 |
} |
|
1110 |
set_unload_reported(); |
|
1111 |
} |
|
1112 |
} |
|
1113 |
||
1114 |
||
1115 |
// Zombie only stuff |
|
1116 |
if (state == zombie) { |
|
1117 |
VTune::delete_nmethod(this); |
|
1118 |
} |
|
1119 |
||
1120 |
// Check whether method got unloaded at a safepoint before this, |
|
1121 |
// if so we can skip the flushing steps below |
|
1122 |
if (method() == NULL) return; |
|
1123 |
||
1124 |
// Remove nmethod from method. |
|
1125 |
// We need to check if both the _code and _from_compiled_code_entry_point |
|
1126 |
// refer to this nmethod because there is a race in setting these two fields |
|
1127 |
// in methodOop as seen in bugid 4947125. |
|
1128 |
// If the vep() points to the zombie nmethod, the memory for the nmethod |
|
1129 |
// could be flushed and the compiler and vtable stubs could still call |
|
1130 |
// through it. |
|
1131 |
if (method()->code() == this || |
|
1132 |
method()->from_compiled_entry() == verified_entry_point()) { |
|
1133 |
HandleMark hm; |
|
1134 |
method()->clear_code(); |
|
1135 |
} |
|
1136 |
} |
|
1137 |
||
1138 |
||
1139 |
#ifndef PRODUCT |
|
1140 |
void nmethod::check_safepoint() { |
|
1141 |
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
|
1142 |
} |
|
1143 |
#endif |
|
1144 |
||
1145 |
||
1146 |
void nmethod::flush() { |
|
1147 |
// Note that there are no valid oops in the nmethod anymore. |
|
1148 |
assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); |
|
1149 |
assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); |
|
1150 |
||
1151 |
assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); |
|
1152 |
check_safepoint(); |
|
1153 |
||
1154 |
// completely deallocate this method |
|
1155 |
EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); |
|
1156 |
if (PrintMethodFlushing) { |
|
1157 |
tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs()); |
|
1158 |
} |
|
1159 |
||
1160 |
// We need to deallocate any ExceptionCache data. |
|
1161 |
// Note that we do not need to grab the nmethod lock for this, it |
|
1162 |
// better be thread safe if we're disposing of it! |
|
1163 |
ExceptionCache* ec = exception_cache(); |
|
1164 |
set_exception_cache(NULL); |
|
1165 |
while(ec != NULL) { |
|
1166 |
ExceptionCache* next = ec->next(); |
|
1167 |
delete ec; |
|
1168 |
ec = next; |
|
1169 |
} |
|
1170 |
||
1171 |
((CodeBlob*)(this))->flush(); |
|
1172 |
||
1173 |
CodeCache::free(this); |
|
1174 |
} |
|
1175 |
||
1176 |
||
1177 |
// |
|
1178 |
// Notify all classes this nmethod is dependent on that it is no |
|
1179 |
// longer dependent. This should only be called in two situations. |
|
1180 |
// First, when a nmethod transitions to a zombie all dependents need |
|
1181 |
// to be clear. Since zombification happens at a safepoint there's no |
|
1182 |
// synchronization issues. The second place is a little more tricky. |
|
1183 |
// During phase 1 of mark sweep class unloading may happen and as a |
|
1184 |
// result some nmethods may get unloaded. In this case the flushing |
|
1185 |
// of dependencies must happen during phase 1 since after GC any |
|
1186 |
// dependencies in the unloaded nmethod won't be updated, so |
|
1187 |
// traversing the dependency information in unsafe. In that case this |
|
1188 |
// function is called with a non-NULL argument and this function only |
|
1189 |
// notifies instanceKlasses that are reachable |
|
1190 |
||
1191 |
void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { |
|
1192 |
assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); |
|
1193 |
assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
|
1194 |
"is_alive is non-NULL if and only if we are called during GC"); |
|
1195 |
if (!has_flushed_dependencies()) { |
|
1196 |
set_has_flushed_dependencies(); |
|
1197 |
for (Dependencies::DepStream deps(this); deps.next(); ) { |
|
1198 |
klassOop klass = deps.context_type(); |
|
1199 |
if (klass == NULL) continue; // ignore things like evol_method |
|
1200 |
||
1201 |
// During GC the is_alive closure is non-NULL, and is used to |
|
1202 |
// determine liveness of dependees that need to be updated. |
|
1203 |
if (is_alive == NULL || is_alive->do_object_b(klass)) { |
|
1204 |
instanceKlass::cast(klass)->remove_dependent_nmethod(this); |
|
1205 |
} |
|
1206 |
} |
|
1207 |
} |
|
1208 |
} |
|
1209 |
||
1210 |
||
1211 |
// If this oop is not live, the nmethod can be unloaded. |
|
1212 |
bool nmethod::can_unload(BoolObjectClosure* is_alive, |
|
1213 |
OopClosure* keep_alive, |
|
1214 |
oop* root, bool unloading_occurred) { |
|
1215 |
assert(root != NULL, "just checking"); |
|
1216 |
oop obj = *root; |
|
1217 |
if (obj == NULL || is_alive->do_object_b(obj)) { |
|
1218 |
return false; |
|
1219 |
} |
|
1220 |
if (obj->is_compiledICHolder()) { |
|
1221 |
compiledICHolderOop cichk_oop = compiledICHolderOop(obj); |
|
1222 |
if (is_alive->do_object_b( |
|
1223 |
cichk_oop->holder_method()->method_holder()) && |
|
1224 |
is_alive->do_object_b(cichk_oop->holder_klass())) { |
|
1225 |
// The oop should be kept alive |
|
1226 |
keep_alive->do_oop(root); |
|
1227 |
return false; |
|
1228 |
} |
|
1229 |
} |
|
1230 |
if (!UseParallelOldGC || !VerifyParallelOldWithMarkSweep) { |
|
1231 |
// Cannot do this test if verification of the UseParallelOldGC |
|
1232 |
// code using the PSMarkSweep code is being done. |
|
1233 |
assert(unloading_occurred, "Inconsistency in unloading"); |
|
1234 |
} |
|
1235 |
make_unloaded(is_alive, obj); |
|
1236 |
return true; |
|
1237 |
} |
|
1238 |
||
1239 |
// ------------------------------------------------------------------ |
|
1240 |
// post_compiled_method_load_event |
|
1241 |
// new method for install_code() path |
|
1242 |
// Transfer information from compilation to jvmti |
|
1243 |
void nmethod::post_compiled_method_load_event() { |
|
1244 |
||
1245 |
methodOop moop = method(); |
|
1246 |
HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
|
1247 |
moop->klass_name()->bytes(), |
|
1248 |
moop->klass_name()->utf8_length(), |
|
1249 |
moop->name()->bytes(), |
|
1250 |
moop->name()->utf8_length(), |
|
1251 |
moop->signature()->bytes(), |
|
1252 |
moop->signature()->utf8_length(), |
|
1253 |
code_begin(), code_size()); |
|
1254 |
||
1255 |
if (JvmtiExport::should_post_compiled_method_load()) { |
|
1256 |
JvmtiExport::post_compiled_method_load(this); |
|
1257 |
} |
|
1258 |
} |
|
1259 |
||
1260 |
void nmethod::post_compiled_method_unload() { |
|
1261 |
assert(_method != NULL && !is_unloaded(), "just checking"); |
|
1262 |
DTRACE_METHOD_UNLOAD_PROBE(method()); |
|
1263 |
||
1264 |
// If a JVMTI agent has enabled the CompiledMethodUnload event then |
|
1265 |
// post the event. Sometime later this nmethod will be made a zombie by |
|
1266 |
// the sweeper but the methodOop will not be valid at that point. |
|
1267 |
if (JvmtiExport::should_post_compiled_method_unload()) { |
|
1268 |
assert(!unload_reported(), "already unloaded"); |
|
1269 |
HandleMark hm; |
|
1270 |
JvmtiExport::post_compiled_method_unload_at_safepoint( |
|
1271 |
method()->jmethod_id(), code_begin()); |
|
1272 |
} |
|
1273 |
||
1274 |
// The JVMTI CompiledMethodUnload event can be enabled or disabled at |
|
1275 |
// any time. As the nmethod is being unloaded now we mark it has |
|
1276 |
// having the unload event reported - this will ensure that we don't |
|
1277 |
// attempt to report the event in the unlikely scenario where the |
|
1278 |
// event is enabled at the time the nmethod is made a zombie. |
|
1279 |
set_unload_reported(); |
|
1280 |
} |
|
1281 |
||
1282 |
// This is called at the end of the strong tracing/marking phase of a |
|
1283 |
// GC to unload an nmethod if it contains otherwise unreachable |
|
1284 |
// oops. |
|
1285 |
||
1286 |
void nmethod::do_unloading(BoolObjectClosure* is_alive, |
|
1287 |
OopClosure* keep_alive, bool unloading_occurred) { |
|
1288 |
// Make sure the oop's ready to receive visitors |
|
1289 |
assert(!is_zombie() && !is_unloaded(), |
|
1290 |
"should not call follow on zombie or unloaded nmethod"); |
|
1291 |
||
1292 |
// If the method is not entrant then a JMP is plastered over the |
|
1293 |
// first few bytes. If an oop in the old code was there, that oop |
|
1294 |
// should not get GC'd. Skip the first few bytes of oops on |
|
1295 |
// not-entrant methods. |
|
1296 |
address low_boundary = verified_entry_point(); |
|
1297 |
if (is_not_entrant()) { |
|
1298 |
low_boundary += NativeJump::instruction_size; |
|
1299 |
// %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
|
1300 |
// (See comment above.) |
|
1301 |
} |
|
1302 |
||
1303 |
// The RedefineClasses() API can cause the class unloading invariant |
|
1304 |
// to no longer be true. See jvmtiExport.hpp for details. |
|
1305 |
// Also, leave a debugging breadcrumb in local flag. |
|
1306 |
bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); |
|
1307 |
if (a_class_was_redefined) { |
|
1308 |
// This set of the unloading_occurred flag is done before the |
|
1309 |
// call to post_compiled_method_unload() so that the unloading |
|
1310 |
// of this nmethod is reported. |
|
1311 |
unloading_occurred = true; |
|
1312 |
} |
|
1313 |
||
1314 |
// Follow methodOop |
|
1315 |
if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { |
|
1316 |
return; |
|
1317 |
} |
|
1318 |
||
1319 |
// Exception cache |
|
1320 |
ExceptionCache* ec = exception_cache(); |
|
1321 |
while (ec != NULL) { |
|
1322 |
oop* ex_addr = (oop*)ec->exception_type_addr(); |
|
1323 |
oop ex = *ex_addr; |
|
1324 |
ExceptionCache* next_ec = ec->next(); |
|
1325 |
if (ex != NULL && !is_alive->do_object_b(ex)) { |
|
1326 |
assert(!ex->is_compiledICHolder(), "Possible error here"); |
|
1327 |
remove_from_exception_cache(ec); |
|
1328 |
} |
|
1329 |
ec = next_ec; |
|
1330 |
} |
|
1331 |
||
1332 |
// If class unloading occurred we first iterate over all inline caches and |
|
1333 |
// clear ICs where the cached oop is referring to an unloaded klass or method. |
|
1334 |
// The remaining live cached oops will be traversed in the relocInfo::oop_type |
|
1335 |
// iteration below. |
|
1336 |
if (unloading_occurred) { |
|
1337 |
RelocIterator iter(this, low_boundary); |
|
1338 |
while(iter.next()) { |
|
1339 |
if (iter.type() == relocInfo::virtual_call_type) { |
|
1340 |
CompiledIC *ic = CompiledIC_at(iter.reloc()); |
|
1341 |
oop ic_oop = ic->cached_oop(); |
|
1342 |
if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { |
|
1343 |
// The only exception is compiledICHolder oops which may |
|
1344 |
// yet be marked below. (We check this further below). |
|
1345 |
if (ic_oop->is_compiledICHolder()) { |
|
1346 |
compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); |
|
1347 |
if (is_alive->do_object_b( |
|
1348 |
cichk_oop->holder_method()->method_holder()) && |
|
1349 |
is_alive->do_object_b(cichk_oop->holder_klass())) { |
|
1350 |
continue; |
|
1351 |
} |
|
1352 |
} |
|
1353 |
ic->set_to_clean(); |
|
1354 |
assert(ic->cached_oop() == NULL, "cached oop in IC should be cleared") |
|
1355 |
} |
|
1356 |
} |
|
1357 |
} |
|
1358 |
} |
|
1359 |
||
1360 |
// Compiled code |
|
1361 |
RelocIterator iter(this, low_boundary); |
|
1362 |
while (iter.next()) { |
|
1363 |
if (iter.type() == relocInfo::oop_type) { |
|
1364 |
oop_Relocation* r = iter.oop_reloc(); |
|
1365 |
// In this loop, we must only traverse those oops directly embedded in |
|
1366 |
// the code. Other oops (oop_index>0) are seen as part of scopes_oops. |
|
1367 |
assert(1 == (r->oop_is_immediate()) + |
|
1368 |
(r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), |
|
1369 |
"oop must be found in exactly one place"); |
|
1370 |
if (r->oop_is_immediate() && r->oop_value() != NULL) { |
|
1371 |
if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { |
|
1372 |
return; |
|
1373 |
} |
|
1374 |
} |
|
1375 |
} |
|
1376 |
} |
|
1377 |
||
1378 |
||
1379 |
// Scopes |
|
1380 |
for (oop* p = oops_begin(); p < oops_end(); p++) { |
|
1381 |
if (*p == Universe::non_oop_word()) continue; // skip non-oops |
|
1382 |
if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { |
|
1383 |
return; |
|
1384 |
} |
|
1385 |
} |
|
1386 |
||
1387 |
#ifndef PRODUCT |
|
1388 |
// This nmethod was not unloaded; check below that all CompiledICs |
|
1389 |
// refer to marked oops. |
|
1390 |
{ |
|
1391 |
RelocIterator iter(this, low_boundary); |
|
1392 |
while (iter.next()) { |
|
1393 |
if (iter.type() == relocInfo::virtual_call_type) { |
|
1394 |
CompiledIC *ic = CompiledIC_at(iter.reloc()); |
|
1395 |
oop ic_oop = ic->cached_oop(); |
|
1396 |
assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), |
|
1397 |
"Found unmarked ic_oop in reachable nmethod"); |
|
1398 |
} |
|
1399 |
} |
|
1400 |
} |
|
1401 |
#endif // !PRODUCT |
|
1402 |
} |
|
1403 |
||
1404 |
void nmethod::oops_do(OopClosure* f) { |
|
1405 |
// make sure the oops ready to receive visitors |
|
1406 |
assert(!is_zombie() && !is_unloaded(), |
|
1407 |
"should not call follow on zombie or unloaded nmethod"); |
|
1408 |
||
1409 |
// If the method is not entrant or zombie then a JMP is plastered over the |
|
1410 |
// first few bytes. If an oop in the old code was there, that oop |
|
1411 |
// should not get GC'd. Skip the first few bytes of oops on |
|
1412 |
// not-entrant methods. |
|
1413 |
address low_boundary = verified_entry_point(); |
|
1414 |
if (is_not_entrant()) { |
|
1415 |
low_boundary += NativeJump::instruction_size; |
|
1416 |
// %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
|
1417 |
// (See comment above.) |
|
1418 |
} |
|
1419 |
||
1420 |
// Compiled code |
|
1421 |
f->do_oop((oop*) &_method); |
|
1422 |
ExceptionCache* ec = exception_cache(); |
|
1423 |
while(ec != NULL) { |
|
1424 |
f->do_oop((oop*)ec->exception_type_addr()); |
|
1425 |
ec = ec->next(); |
|
1426 |
} |
|
1427 |
||
1428 |
RelocIterator iter(this, low_boundary); |
|
1429 |
while (iter.next()) { |
|
1430 |
if (iter.type() == relocInfo::oop_type ) { |
|
1431 |
oop_Relocation* r = iter.oop_reloc(); |
|
1432 |
// In this loop, we must only follow those oops directly embedded in |
|
1433 |
// the code. Other oops (oop_index>0) are seen as part of scopes_oops. |
|
1434 |
assert(1 == (r->oop_is_immediate()) + (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), "oop must be found in exactly one place"); |
|
1435 |
if (r->oop_is_immediate() && r->oop_value() != NULL) { |
|
1436 |
f->do_oop(r->oop_addr()); |
|
1437 |
} |
|
1438 |
} |
|
1439 |
} |
|
1440 |
||
1441 |
// Scopes |
|
1442 |
for (oop* p = oops_begin(); p < oops_end(); p++) { |
|
1443 |
if (*p == Universe::non_oop_word()) continue; // skip non-oops |
|
1444 |
f->do_oop(p); |
|
1445 |
} |
|
1446 |
} |
|
1447 |
||
1448 |
// Method that knows how to preserve outgoing arguments at call. This method must be |
|
1449 |
// called with a frame corresponding to a Java invoke |
|
1450 |
void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { |
|
1451 |
if (!method()->is_native()) { |
|
1452 |
SimpleScopeDesc ssd(this, fr.pc()); |
|
1453 |
Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); |
|
1454 |
bool is_static = call->is_invokestatic(); |
|
1455 |
symbolOop signature = call->signature(); |
|
1456 |
fr.oops_compiled_arguments_do(signature, is_static, reg_map, f); |
|
1457 |
} |
|
1458 |
} |
|
1459 |
||
1460 |
||
1461 |
oop nmethod::embeddedOop_at(u_char* p) { |
|
1462 |
RelocIterator iter(this, p, p + oopSize); |
|
1463 |
while (iter.next()) |
|
1464 |
if (iter.type() == relocInfo::oop_type) { |
|
1465 |
return iter.oop_reloc()->oop_value(); |
|
1466 |
} |
|
1467 |
return NULL; |
|
1468 |
} |
|
1469 |
||
1470 |
||
1471 |
inline bool includes(void* p, void* from, void* to) { |
|
1472 |
return from <= p && p < to; |
|
1473 |
} |
|
1474 |
||
1475 |
||
1476 |
void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { |
|
1477 |
assert(count >= 2, "must be sentinel values, at least"); |
|
1478 |
||
1479 |
#ifdef ASSERT |
|
1480 |
// must be sorted and unique; we do a binary search in find_pc_desc() |
|
1481 |
int prev_offset = pcs[0].pc_offset(); |
|
1482 |
assert(prev_offset == PcDesc::lower_offset_limit, |
|
1483 |
"must start with a sentinel"); |
|
1484 |
for (int i = 1; i < count; i++) { |
|
1485 |
int this_offset = pcs[i].pc_offset(); |
|
1486 |
assert(this_offset > prev_offset, "offsets must be sorted"); |
|
1487 |
prev_offset = this_offset; |
|
1488 |
} |
|
1489 |
assert(prev_offset == PcDesc::upper_offset_limit, |
|
1490 |
"must end with a sentinel"); |
|
1491 |
#endif //ASSERT |
|
1492 |
||
1493 |
int size = count * sizeof(PcDesc); |
|
1494 |
assert(scopes_pcs_size() >= size, "oob"); |
|
1495 |
memcpy(scopes_pcs_begin(), pcs, size); |
|
1496 |
||
1497 |
// Adjust the final sentinel downward. |
|
1498 |
PcDesc* last_pc = &scopes_pcs_begin()[count-1]; |
|
1499 |
assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); |
|
1500 |
last_pc->set_pc_offset(instructions_size() + 1); |
|
1501 |
for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
|
1502 |
// Fill any rounding gaps with copies of the last record. |
|
1503 |
last_pc[1] = last_pc[0]; |
|
1504 |
} |
|
1505 |
// The following assert could fail if sizeof(PcDesc) is not |
|
1506 |
// an integral multiple of oopSize (the rounding term). |
|
1507 |
// If it fails, change the logic to always allocate a multiple |
|
1508 |
// of sizeof(PcDesc), and fill unused words with copies of *last_pc. |
|
1509 |
assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); |
|
1510 |
} |
|
1511 |
||
1512 |
void nmethod::copy_scopes_data(u_char* buffer, int size) { |
|
1513 |
assert(scopes_data_size() >= size, "oob"); |
|
1514 |
memcpy(scopes_data_begin(), buffer, size); |
|
1515 |
} |
|
1516 |
||
1517 |
||
1518 |
#ifdef ASSERT |
|
1519 |
static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { |
|
1520 |
PcDesc* lower = nm->scopes_pcs_begin(); |
|
1521 |
PcDesc* upper = nm->scopes_pcs_end(); |
|
1522 |
lower += 1; // exclude initial sentinel |
|
1523 |
PcDesc* res = NULL; |
|
1524 |
for (PcDesc* p = lower; p < upper; p++) { |
|
1525 |
NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc |
|
1526 |
if (match_desc(p, pc_offset, approximate)) { |
|
1527 |
if (res == NULL) |
|
1528 |
res = p; |
|
1529 |
else |
|
1530 |
res = (PcDesc*) badAddress; |
|
1531 |
} |
|
1532 |
} |
|
1533 |
return res; |
|
1534 |
} |
|
1535 |
#endif |
|
1536 |
||
1537 |
||
1538 |
// Finds a PcDesc with real-pc equal to "pc" |
|
1539 |
PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { |
|
1540 |
address base_address = instructions_begin(); |
|
1541 |
if ((pc < base_address) || |
|
1542 |
(pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { |
|
1543 |
return NULL; // PC is wildly out of range |
|
1544 |
} |
|
1545 |
int pc_offset = (int) (pc - base_address); |
|
1546 |
||
1547 |
// Check the PcDesc cache if it contains the desired PcDesc |
|
1548 |
// (This as an almost 100% hit rate.) |
|
1549 |
PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); |
|
1550 |
if (res != NULL) { |
|
1551 |
assert(res == linear_search(this, pc_offset, approximate), "cache ok"); |
|
1552 |
return res; |
|
1553 |
} |
|
1554 |
||
1555 |
// Fallback algorithm: quasi-linear search for the PcDesc |
|
1556 |
// Find the last pc_offset less than the given offset. |
|
1557 |
// The successor must be the required match, if there is a match at all. |
|
1558 |
// (Use a fixed radix to avoid expensive affine pointer arithmetic.) |
|
1559 |
PcDesc* lower = scopes_pcs_begin(); |
|
1560 |
PcDesc* upper = scopes_pcs_end(); |
|
1561 |
upper -= 1; // exclude final sentinel |
|
1562 |
if (lower >= upper) return NULL; // native method; no PcDescs at all |
|
1563 |
||
1564 |
#define assert_LU_OK \ |
|
1565 |
/* invariant on lower..upper during the following search: */ \ |
|
1566 |
assert(lower->pc_offset() < pc_offset, "sanity"); \ |
|
1567 |
assert(upper->pc_offset() >= pc_offset, "sanity") |
|
1568 |
assert_LU_OK; |
|
1569 |
||
1570 |
// Use the last successful return as a split point. |
|
1571 |
PcDesc* mid = _pc_desc_cache.last_pc_desc(); |
|
1572 |
NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
|
1573 |
if (mid->pc_offset() < pc_offset) { |
|
1574 |
lower = mid; |
|
1575 |
} else { |
|
1576 |
upper = mid; |
|
1577 |
} |
|
1578 |
||
1579 |
// Take giant steps at first (4096, then 256, then 16, then 1) |
|
1580 |
const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); |
|
1581 |
const int RADIX = (1 << LOG2_RADIX); |
|
1582 |
for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { |
|
1583 |
while ((mid = lower + step) < upper) { |
|
1584 |
assert_LU_OK; |
|
1585 |
NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
|
1586 |
if (mid->pc_offset() < pc_offset) { |
|
1587 |
lower = mid; |
|
1588 |
} else { |
|
1589 |
upper = mid; |
|
1590 |
break; |
|
1591 |
} |
|
1592 |
} |
|
1593 |
assert_LU_OK; |
|
1594 |
} |
|
1595 |
||
1596 |
// Sneak up on the value with a linear search of length ~16. |
|
1597 |
while (true) { |
|
1598 |
assert_LU_OK; |
|
1599 |
mid = lower + 1; |
|
1600 |
NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
|
1601 |
if (mid->pc_offset() < pc_offset) { |
|
1602 |
lower = mid; |
|
1603 |
} else { |
|
1604 |
upper = mid; |
|
1605 |
break; |
|
1606 |
} |
|
1607 |
} |
|
1608 |
#undef assert_LU_OK |
|
1609 |
||
1610 |
if (match_desc(upper, pc_offset, approximate)) { |
|
1611 |
assert(upper == linear_search(this, pc_offset, approximate), "search ok"); |
|
1612 |
_pc_desc_cache.add_pc_desc(upper); |
|
1613 |
return upper; |
|
1614 |
} else { |
|
1615 |
assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); |
|
1616 |
return NULL; |
|
1617 |
} |
|
1618 |
} |
|
1619 |
||
1620 |
||
1621 |
bool nmethod::check_all_dependencies() { |
|
1622 |
bool found_check = false; |
|
1623 |
// wholesale check of all dependencies |
|
1624 |
for (Dependencies::DepStream deps(this); deps.next(); ) { |
|
1625 |
if (deps.check_dependency() != NULL) { |
|
1626 |
found_check = true; |
|
1627 |
NOT_DEBUG(break); |
|
1628 |
} |
|
1629 |
} |
|
1630 |
return found_check; // tell caller if we found anything |
|
1631 |
} |
|
1632 |
||
1633 |
bool nmethod::check_dependency_on(DepChange& changes) { |
|
1634 |
// What has happened: |
|
1635 |
// 1) a new class dependee has been added |
|
1636 |
// 2) dependee and all its super classes have been marked |
|
1637 |
bool found_check = false; // set true if we are upset |
|
1638 |
for (Dependencies::DepStream deps(this); deps.next(); ) { |
|
1639 |
// Evaluate only relevant dependencies. |
|
1640 |
if (deps.spot_check_dependency_at(changes) != NULL) { |
|
1641 |
found_check = true; |
|
1642 |
NOT_DEBUG(break); |
|
1643 |
} |
|
1644 |
} |
|
1645 |
return found_check; |
|
1646 |
} |
|
1647 |
||
1648 |
bool nmethod::is_evol_dependent_on(klassOop dependee) { |
|
1649 |
instanceKlass *dependee_ik = instanceKlass::cast(dependee); |
|
1650 |
objArrayOop dependee_methods = dependee_ik->methods(); |
|
1651 |
for (Dependencies::DepStream deps(this); deps.next(); ) { |
|
1652 |
if (deps.type() == Dependencies::evol_method) { |
|
1653 |
methodOop method = deps.method_argument(0); |
|
1654 |
for (int j = 0; j < dependee_methods->length(); j++) { |
|
1655 |
if ((methodOop) dependee_methods->obj_at(j) == method) { |
|
1656 |
// RC_TRACE macro has an embedded ResourceMark |
|
1657 |
RC_TRACE(0x01000000, |
|
1658 |
("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", |
|
1659 |
_method->method_holder()->klass_part()->external_name(), |
|
1660 |
_method->name()->as_C_string(), |
|
1661 |
_method->signature()->as_C_string(), compile_id(), |
|
1662 |
method->method_holder()->klass_part()->external_name(), |
|
1663 |
method->name()->as_C_string(), |
|
1664 |
method->signature()->as_C_string())); |
|
1665 |
if (TraceDependencies || LogCompilation) |
|
1666 |
deps.log_dependency(dependee); |
|
1667 |
return true; |
|
1668 |
} |
|
1669 |
} |
|
1670 |
} |
|
1671 |
} |
|
1672 |
return false; |
|
1673 |
} |
|
1674 |
||
1675 |
// Called from mark_for_deoptimization, when dependee is invalidated. |
|
1676 |
bool nmethod::is_dependent_on_method(methodOop dependee) { |
|
1677 |
for (Dependencies::DepStream deps(this); deps.next(); ) { |
|
1678 |
if (deps.type() != Dependencies::evol_method) |
|
1679 |
continue; |
|
1680 |
methodOop method = deps.method_argument(0); |
|
1681 |
if (method == dependee) return true; |
|
1682 |
} |
|
1683 |
return false; |
|
1684 |
} |
|
1685 |
||
1686 |
||
1687 |
bool nmethod::is_patchable_at(address instr_addr) { |
|
1688 |
assert (code_contains(instr_addr), "wrong nmethod used"); |
|
1689 |
if (is_zombie()) { |
|
1690 |
// a zombie may never be patched |
|
1691 |
return false; |
|
1692 |
} |
|
1693 |
return true; |
|
1694 |
} |
|
1695 |
||
1696 |
||
1697 |
address nmethod::continuation_for_implicit_exception(address pc) { |
|
1698 |
// Exception happened outside inline-cache check code => we are inside |
|
1699 |
// an active nmethod => use cpc to determine a return address |
|
1700 |
int exception_offset = pc - instructions_begin(); |
|
1701 |
int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
|
1702 |
#ifdef ASSERT |
|
1703 |
if (cont_offset == 0) { |
|
1704 |
Thread* thread = ThreadLocalStorage::get_thread_slow(); |
|
1705 |
ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY |
|
1706 |
HandleMark hm(thread); |
|
1707 |
ResourceMark rm(thread); |
|
1708 |
CodeBlob* cb = CodeCache::find_blob(pc); |
|
1709 |
assert(cb != NULL && cb == this, ""); |
|
1710 |
tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); |
|
1711 |
print(); |
|
1712 |
method()->print_codes(); |
|
1713 |
print_code(); |
|
1714 |
print_pcs(); |
|
1715 |
} |
|
1716 |
#endif |
|
1717 |
guarantee(cont_offset != 0, "unhandled implicit exception in compiled code"); |
|
1718 |
return instructions_begin() + cont_offset; |
|
1719 |
} |
|
1720 |
||
1721 |
||
1722 |
||
1723 |
void nmethod_init() { |
|
1724 |
// make sure you didn't forget to adjust the filler fields |
|
1725 |
assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word"); |
|
1726 |
assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); |
|
1727 |
} |
|
1728 |
||
1729 |
||
1730 |
//------------------------------------------------------------------------------------------- |
|
1731 |
||
1732 |
||
1733 |
// QQQ might we make this work from a frame?? |
|
1734 |
nmethodLocker::nmethodLocker(address pc) { |
|
1735 |
CodeBlob* cb = CodeCache::find_blob(pc); |
|
1736 |
guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); |
|
1737 |
_nm = (nmethod*)cb; |
|
1738 |
lock_nmethod(_nm); |
|
1739 |
} |
|
1740 |
||
1741 |
void nmethodLocker::lock_nmethod(nmethod* nm) { |
|
1742 |
if (nm == NULL) return; |
|
1743 |
Atomic::inc(&nm->_lock_count); |
|
1744 |
guarantee(!nm->is_zombie(), "cannot lock a zombie method"); |
|
1745 |
} |
|
1746 |
||
1747 |
void nmethodLocker::unlock_nmethod(nmethod* nm) { |
|
1748 |
if (nm == NULL) return; |
|
1749 |
Atomic::dec(&nm->_lock_count); |
|
1750 |
guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); |
|
1751 |
} |
|
1752 |
||
1753 |
bool nmethod::is_deopt_pc(address pc) { |
|
1754 |
bool ret = pc == deopt_handler_begin(); |
|
1755 |
return ret; |
|
1756 |
} |
|
1757 |
||
1758 |
||
1759 |
// ----------------------------------------------------------------------------- |
|
1760 |
// Verification |
|
1761 |
||
1762 |
void nmethod::verify() { |
|
1763 |
||
1764 |
// Hmm. OSR methods can be deopted but not marked as zombie or not_entrant |
|
1765 |
// seems odd. |
|
1766 |
||
1767 |
if( is_zombie() || is_not_entrant() ) |
|
1768 |
return; |
|
1769 |
||
1770 |
// Make sure all the entry points are correctly aligned for patching. |
|
1771 |
NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); |
|
1772 |
||
1773 |
assert(method()->is_oop(), "must be valid"); |
|
1774 |
||
1775 |
ResourceMark rm; |
|
1776 |
||
1777 |
if (!CodeCache::contains(this)) { |
|
1778 |
fatal1("nmethod at " INTPTR_FORMAT " not in zone", this); |
|
1779 |
} |
|
1780 |
||
1781 |
if(is_native_method() ) |
|
1782 |
return; |
|
1783 |
||
1784 |
nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); |
|
1785 |
if (nm != this) { |
|
1786 |
fatal1("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", this); |
|
1787 |
} |
|
1788 |
||
1789 |
for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
|
1790 |
if (! p->verify(this)) { |
|
1791 |
tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); |
|
1792 |
} |
|
1793 |
} |
|
1794 |
||
1795 |
verify_scopes(); |
|
1796 |
} |
|
1797 |
||
1798 |
||
1799 |
void nmethod::verify_interrupt_point(address call_site) { |
|
1800 |
// This code does not work in release mode since |
|
1801 |
// owns_lock only is available in debug mode. |
|
1802 |
CompiledIC* ic = NULL; |
|
1803 |
Thread *cur = Thread::current(); |
|
1804 |
if (CompiledIC_lock->owner() == cur || |
|
1805 |
((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
|
1806 |
SafepointSynchronize::is_at_safepoint())) { |
|
1807 |
ic = CompiledIC_at(call_site); |
|
1808 |
CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
|
1809 |
} else { |
|
1810 |
MutexLocker ml_verify (CompiledIC_lock); |
|
1811 |
ic = CompiledIC_at(call_site); |
|
1812 |
} |
|
1813 |
PcDesc* pd = pc_desc_at(ic->end_of_call()); |
|
1814 |
assert(pd != NULL, "PcDesc must exist"); |
|
1815 |
for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), |
|
1816 |
pd->obj_decode_offset()); |
|
1817 |
!sd->is_top(); sd = sd->sender()) { |
|
1818 |
sd->verify(); |
|
1819 |
} |
|
1820 |
} |
|
1821 |
||
1822 |
void nmethod::verify_scopes() { |
|
1823 |
if( !method() ) return; // Runtime stubs have no scope |
|
1824 |
if (method()->is_native()) return; // Ignore stub methods. |
|
1825 |
// iterate through all interrupt point |
|
1826 |
// and verify the debug information is valid. |
|
1827 |
RelocIterator iter((nmethod*)this); |
|
1828 |
while (iter.next()) { |
|
1829 |
address stub = NULL; |
|
1830 |
switch (iter.type()) { |
|
1831 |
case relocInfo::virtual_call_type: |
|
1832 |
verify_interrupt_point(iter.addr()); |
|
1833 |
break; |
|
1834 |
case relocInfo::opt_virtual_call_type: |
|
1835 |
stub = iter.opt_virtual_call_reloc()->static_stub(); |
|
1836 |
verify_interrupt_point(iter.addr()); |
|
1837 |
break; |
|
1838 |
case relocInfo::static_call_type: |
|
1839 |
stub = iter.static_call_reloc()->static_stub(); |
|
1840 |
//verify_interrupt_point(iter.addr()); |
|
1841 |
break; |
|
1842 |
case relocInfo::runtime_call_type: |
|
1843 |
address destination = iter.reloc()->value(); |
|
1844 |
// Right now there is no way to find out which entries support |
|
1845 |
// an interrupt point. It would be nice if we had this |
|
1846 |
// information in a table. |
|
1847 |
break; |
|
1848 |
} |
|
1849 |
assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); |
|
1850 |
} |
|
1851 |
} |
|
1852 |
||
1853 |
||
1854 |
// ----------------------------------------------------------------------------- |
|
1855 |
// Non-product code |
|
1856 |
#ifndef PRODUCT |
|
1857 |
||
1858 |
void nmethod::check_store() { |
|
1859 |
// Make sure all oops in the compiled code are tenured |
|
1860 |
||
1861 |
RelocIterator iter(this); |
|
1862 |
while (iter.next()) { |
|
1863 |
if (iter.type() == relocInfo::oop_type) { |
|
1864 |
oop_Relocation* reloc = iter.oop_reloc(); |
|
1865 |
oop obj = reloc->oop_value(); |
|
1866 |
if (obj != NULL && !obj->is_perm()) { |
|
1867 |
fatal("must be permanent oop in compiled code"); |
|
1868 |
} |
|
1869 |
} |
|
1870 |
} |
|
1871 |
} |
|
1872 |
||
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
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parents:
203
diff
changeset
|
1873 |
#endif // PRODUCT |
1 | 1874 |
|
1875 |
// Printing operations |
|
1876 |
||
1877 |
void nmethod::print() const { |
|
1878 |
ResourceMark rm; |
|
1879 |
ttyLocker ttyl; // keep the following output all in one block |
|
1880 |
||
1881 |
tty->print("Compiled "); |
|
1882 |
||
1883 |
if (is_compiled_by_c1()) { |
|
1884 |
tty->print("(c1) "); |
|
1885 |
} else if (is_compiled_by_c2()) { |
|
1886 |
tty->print("(c2) "); |
|
1887 |
} else { |
|
1888 |
assert(is_native_method(), "Who else?"); |
|
1889 |
tty->print("(nm) "); |
|
1890 |
} |
|
1891 |
||
1892 |
print_on(tty, "nmethod"); |
|
1893 |
tty->cr(); |
|
1894 |
if (WizardMode) { |
|
1895 |
tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); |
|
1896 |
tty->print(" for method " INTPTR_FORMAT , (address)method()); |
|
1897 |
tty->print(" { "); |
|
1898 |
if (version()) tty->print("v%d ", version()); |
|
1899 |
if (level()) tty->print("l%d ", level()); |
|
1900 |
if (is_in_use()) tty->print("in_use "); |
|
1901 |
if (is_not_entrant()) tty->print("not_entrant "); |
|
1902 |
if (is_zombie()) tty->print("zombie "); |
|
1903 |
if (is_unloaded()) tty->print("unloaded "); |
|
1904 |
tty->print_cr("}:"); |
|
1905 |
} |
|
1906 |
if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1907 |
(address)this, |
|
1908 |
(address)this + size(), |
|
1909 |
size()); |
|
1910 |
if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1911 |
relocation_begin(), |
|
1912 |
relocation_end(), |
|
1913 |
relocation_size()); |
|
1914 |
if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1915 |
code_begin(), |
|
1916 |
code_end(), |
|
1917 |
code_size()); |
|
1918 |
if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1919 |
stub_begin(), |
|
1920 |
stub_end(), |
|
1921 |
stub_size()); |
|
1922 |
if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1923 |
consts_begin(), |
|
1924 |
consts_end(), |
|
1925 |
consts_size()); |
|
1926 |
if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1927 |
scopes_data_begin(), |
|
1928 |
scopes_data_end(), |
|
1929 |
scopes_data_size()); |
|
1930 |
if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1931 |
scopes_pcs_begin(), |
|
1932 |
scopes_pcs_end(), |
|
1933 |
scopes_pcs_size()); |
|
1934 |
if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1935 |
dependencies_begin(), |
|
1936 |
dependencies_end(), |
|
1937 |
dependencies_size()); |
|
1938 |
if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1939 |
handler_table_begin(), |
|
1940 |
handler_table_end(), |
|
1941 |
handler_table_size()); |
|
1942 |
if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1943 |
nul_chk_table_begin(), |
|
1944 |
nul_chk_table_end(), |
|
1945 |
nul_chk_table_size()); |
|
1946 |
if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
1947 |
oops_begin(), |
|
1948 |
oops_end(), |
|
1949 |
oops_size()); |
|
1950 |
} |
|
1951 |
||
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1952 |
void nmethod::print_code() { |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1953 |
HandleMark hm; |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1954 |
ResourceMark m; |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1955 |
Disassembler::decode(this); |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1956 |
} |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1957 |
|
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1958 |
|
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
1959 |
#ifndef PRODUCT |
1 | 1960 |
|
1961 |
void nmethod::print_scopes() { |
|
1962 |
// Find the first pc desc for all scopes in the code and print it. |
|
1963 |
ResourceMark rm; |
|
1964 |
for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
|
1965 |
if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) |
|
1966 |
continue; |
|
1967 |
||
1968 |
ScopeDesc* sd = scope_desc_at(p->real_pc(this)); |
|
1969 |
sd->print_on(tty, p); |
|
1970 |
} |
|
1971 |
} |
|
1972 |
||
1973 |
void nmethod::print_dependencies() { |
|
1974 |
ResourceMark rm; |
|
1975 |
ttyLocker ttyl; // keep the following output all in one block |
|
1976 |
tty->print_cr("Dependencies:"); |
|
1977 |
for (Dependencies::DepStream deps(this); deps.next(); ) { |
|
1978 |
deps.print_dependency(); |
|
1979 |
klassOop ctxk = deps.context_type(); |
|
1980 |
if (ctxk != NULL) { |
|
1981 |
Klass* k = Klass::cast(ctxk); |
|
1982 |
if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { |
|
203 | 1983 |
tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
1 | 1984 |
} |
1985 |
} |
|
1986 |
deps.log_dependency(); // put it into the xml log also |
|
1987 |
} |
|
1988 |
} |
|
1989 |
||
1990 |
||
1991 |
void nmethod::print_relocations() { |
|
1992 |
ResourceMark m; // in case methods get printed via the debugger |
|
1993 |
tty->print_cr("relocations:"); |
|
1994 |
RelocIterator iter(this); |
|
1995 |
iter.print(); |
|
1996 |
if (UseRelocIndex) { |
|
1997 |
jint* index_end = (jint*)relocation_end() - 1; |
|
1998 |
jint index_size = *index_end; |
|
1999 |
jint* index_start = (jint*)( (address)index_end - index_size ); |
|
2000 |
tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); |
|
2001 |
if (index_size > 0) { |
|
2002 |
jint* ip; |
|
2003 |
for (ip = index_start; ip+2 <= index_end; ip += 2) |
|
2004 |
tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, |
|
2005 |
ip[0], |
|
2006 |
ip[1], |
|
2007 |
header_end()+ip[0], |
|
2008 |
relocation_begin()-1+ip[1]); |
|
2009 |
for (; ip < index_end; ip++) |
|
2010 |
tty->print_cr(" (%d ?)", ip[0]); |
|
2011 |
tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); |
|
2012 |
tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
|
2013 |
} |
|
2014 |
} |
|
2015 |
} |
|
2016 |
||
2017 |
||
2018 |
void nmethod::print_pcs() { |
|
2019 |
ResourceMark m; // in case methods get printed via debugger |
|
2020 |
tty->print_cr("pc-bytecode offsets:"); |
|
2021 |
for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
|
2022 |
p->print(this); |
|
2023 |
} |
|
2024 |
} |
|
2025 |
||
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2026 |
#endif // PRODUCT |
1 | 2027 |
|
2028 |
const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { |
|
2029 |
RelocIterator iter(this, begin, end); |
|
2030 |
bool have_one = false; |
|
2031 |
while (iter.next()) { |
|
2032 |
have_one = true; |
|
2033 |
switch (iter.type()) { |
|
2034 |
case relocInfo::none: return "no_reloc"; |
|
2035 |
case relocInfo::oop_type: { |
|
2036 |
stringStream st; |
|
2037 |
oop_Relocation* r = iter.oop_reloc(); |
|
2038 |
oop obj = r->oop_value(); |
|
2039 |
st.print("oop("); |
|
2040 |
if (obj == NULL) st.print("NULL"); |
|
2041 |
else obj->print_value_on(&st); |
|
2042 |
st.print(")"); |
|
2043 |
return st.as_string(); |
|
2044 |
} |
|
2045 |
case relocInfo::virtual_call_type: return "virtual_call"; |
|
2046 |
case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; |
|
2047 |
case relocInfo::static_call_type: return "static_call"; |
|
2048 |
case relocInfo::static_stub_type: return "static_stub"; |
|
2049 |
case relocInfo::runtime_call_type: return "runtime_call"; |
|
2050 |
case relocInfo::external_word_type: return "external_word"; |
|
2051 |
case relocInfo::internal_word_type: return "internal_word"; |
|
2052 |
case relocInfo::section_word_type: return "section_word"; |
|
2053 |
case relocInfo::poll_type: return "poll"; |
|
2054 |
case relocInfo::poll_return_type: return "poll_return"; |
|
2055 |
case relocInfo::type_mask: return "type_bit_mask"; |
|
2056 |
} |
|
2057 |
} |
|
2058 |
return have_one ? "other" : NULL; |
|
2059 |
} |
|
2060 |
||
2061 |
// Return a the last scope in (begin..end] |
|
2062 |
ScopeDesc* nmethod::scope_desc_in(address begin, address end) { |
|
2063 |
PcDesc* p = pc_desc_near(begin+1); |
|
2064 |
if (p != NULL && p->real_pc(this) <= end) { |
|
2065 |
return new ScopeDesc(this, p->scope_decode_offset(), |
|
2066 |
p->obj_decode_offset()); |
|
2067 |
} |
|
2068 |
return NULL; |
|
2069 |
} |
|
2070 |
||
2071 |
void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
|
2072 |
// First, find an oopmap in (begin, end]. |
|
2073 |
// We use the odd half-closed interval so that oop maps and scope descs |
|
2074 |
// which are tied to the byte after a call are printed with the call itself. |
|
2075 |
address base = instructions_begin(); |
|
2076 |
OopMapSet* oms = oop_maps(); |
|
2077 |
if (oms != NULL) { |
|
2078 |
for (int i = 0, imax = oms->size(); i < imax; i++) { |
|
2079 |
OopMap* om = oms->at(i); |
|
2080 |
address pc = base + om->offset(); |
|
2081 |
if (pc > begin) { |
|
2082 |
if (pc <= end) { |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2083 |
st->move_to(column); |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2084 |
st->print("; "); |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2085 |
om->print_on(st); |
1 | 2086 |
} |
2087 |
break; |
|
2088 |
} |
|
2089 |
} |
|
2090 |
} |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2091 |
|
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2092 |
// Print any debug info present at this pc. |
1 | 2093 |
ScopeDesc* sd = scope_desc_in(begin, end); |
2094 |
if (sd != NULL) { |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2095 |
st->move_to(column); |
1 | 2096 |
if (sd->bci() == SynchronizationEntryBCI) { |
2097 |
st->print(";*synchronization entry"); |
|
2098 |
} else { |
|
2099 |
if (sd->method().is_null()) { |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2100 |
st->print("method is NULL"); |
1 | 2101 |
} else if (sd->method()->is_native()) { |
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2102 |
st->print("method is native"); |
1 | 2103 |
} else { |
2104 |
address bcp = sd->method()->bcp_from(sd->bci()); |
|
2105 |
Bytecodes::Code bc = Bytecodes::java_code_at(bcp); |
|
2106 |
st->print(";*%s", Bytecodes::name(bc)); |
|
2107 |
switch (bc) { |
|
2108 |
case Bytecodes::_invokevirtual: |
|
2109 |
case Bytecodes::_invokespecial: |
|
2110 |
case Bytecodes::_invokestatic: |
|
2111 |
case Bytecodes::_invokeinterface: |
|
2112 |
{ |
|
2113 |
Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); |
|
2114 |
st->print(" "); |
|
2115 |
if (invoke->name() != NULL) |
|
2116 |
invoke->name()->print_symbol_on(st); |
|
2117 |
else |
|
2118 |
st->print("<UNKNOWN>"); |
|
2119 |
break; |
|
2120 |
} |
|
2121 |
case Bytecodes::_getfield: |
|
2122 |
case Bytecodes::_putfield: |
|
2123 |
case Bytecodes::_getstatic: |
|
2124 |
case Bytecodes::_putstatic: |
|
2125 |
{ |
|
2126 |
methodHandle sdm = sd->method(); |
|
2127 |
Bytecode_field* field = Bytecode_field_at(sdm(), sdm->bcp_from(sd->bci())); |
|
2128 |
constantPoolOop sdmc = sdm->constants(); |
|
2129 |
symbolOop name = sdmc->name_ref_at(field->index()); |
|
2130 |
st->print(" "); |
|
2131 |
if (name != NULL) |
|
2132 |
name->print_symbol_on(st); |
|
2133 |
else |
|
2134 |
st->print("<UNKNOWN>"); |
|
2135 |
} |
|
2136 |
} |
|
2137 |
} |
|
2138 |
} |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2139 |
|
1 | 2140 |
// Print all scopes |
2141 |
for (;sd != NULL; sd = sd->sender()) { |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2142 |
st->move_to(column); |
1 | 2143 |
st->print("; -"); |
2144 |
if (sd->method().is_null()) { |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2145 |
st->print("method is NULL"); |
1 | 2146 |
} else { |
2147 |
sd->method()->print_short_name(st); |
|
2148 |
} |
|
2149 |
int lineno = sd->method()->line_number_from_bci(sd->bci()); |
|
2150 |
if (lineno != -1) { |
|
2151 |
st->print("@%d (line %d)", sd->bci(), lineno); |
|
2152 |
} else { |
|
2153 |
st->print("@%d", sd->bci()); |
|
2154 |
} |
|
2155 |
st->cr(); |
|
2156 |
} |
|
2157 |
} |
|
2158 |
||
2159 |
// Print relocation information |
|
2160 |
const char* str = reloc_string_for(begin, end); |
|
2161 |
if (str != NULL) { |
|
2162 |
if (sd != NULL) st->cr(); |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2163 |
st->move_to(column); |
1 | 2164 |
st->print("; {%s}", str); |
2165 |
} |
|
2166 |
int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); |
|
2167 |
if (cont_offset != 0) { |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2168 |
st->move_to(column); |
1 | 2169 |
st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
2170 |
} |
|
2171 |
||
2172 |
} |
|
2173 |
||
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2174 |
#ifndef PRODUCT |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
203
diff
changeset
|
2175 |
|
1 | 2176 |
void nmethod::print_value_on(outputStream* st) const { |
2177 |
print_on(st, "nmethod"); |
|
2178 |
} |
|
2179 |
||
2180 |
void nmethod::print_calls(outputStream* st) { |
|
2181 |
RelocIterator iter(this); |
|
2182 |
while (iter.next()) { |
|
2183 |
switch (iter.type()) { |
|
2184 |
case relocInfo::virtual_call_type: |
|
2185 |
case relocInfo::opt_virtual_call_type: { |
|
2186 |
VerifyMutexLocker mc(CompiledIC_lock); |
|
2187 |
CompiledIC_at(iter.reloc())->print(); |
|
2188 |
break; |
|
2189 |
} |
|
2190 |
case relocInfo::static_call_type: |
|
2191 |
st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); |
|
2192 |
compiledStaticCall_at(iter.reloc())->print(); |
|
2193 |
break; |
|
2194 |
} |
|
2195 |
} |
|
2196 |
} |
|
2197 |
||
2198 |
void nmethod::print_handler_table() { |
|
2199 |
ExceptionHandlerTable(this).print(); |
|
2200 |
} |
|
2201 |
||
2202 |
void nmethod::print_nul_chk_table() { |
|
2203 |
ImplicitExceptionTable(this).print(instructions_begin()); |
|
2204 |
} |
|
2205 |
||
2206 |
void nmethod::print_statistics() { |
|
2207 |
ttyLocker ttyl; |
|
2208 |
if (xtty != NULL) xtty->head("statistics type='nmethod'"); |
|
2209 |
nmethod_stats.print_native_nmethod_stats(); |
|
2210 |
nmethod_stats.print_nmethod_stats(); |
|
2211 |
DebugInformationRecorder::print_statistics(); |
|
2212 |
nmethod_stats.print_pc_stats(); |
|
2213 |
Dependencies::print_statistics(); |
|
2214 |
if (xtty != NULL) xtty->tail("statistics"); |
|
2215 |
} |
|
2216 |
||
2217 |
#endif // PRODUCT |