Mercurial > hg > graal-compiler
view src/share/vm/prims/jvmtiCodeBlobEvents.cpp @ 17778:a48e16541e6b
8035857: Add tests to verify correctness of operations with BMI1 and LZCNT instructions
Reviewed-by: iveresov, kvn, iignatyev
Contributed-by: filipp.zhinkin@oracle.com
author | iignatyev |
---|---|
date | Sat, 22 Mar 2014 00:26:48 +0400 |
parents | 22b3b2f888bc |
children | d8041d695d19 |
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/* * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "code/codeBlob.hpp" #include "code/codeCache.hpp" #include "code/scopeDesc.hpp" #include "code/vtableStubs.hpp" #include "memory/resourceArea.hpp" #include "oops/oop.inline.hpp" #include "prims/jvmtiCodeBlobEvents.hpp" #include "prims/jvmtiExport.hpp" #include "runtime/handles.hpp" #include "runtime/handles.inline.hpp" #include "runtime/vmThread.hpp" // Support class to collect a list of the non-nmethod CodeBlobs in // the CodeCache. // // This class actually creates a list of JvmtiCodeBlobDesc - each JvmtiCodeBlobDesc // describes a single CodeBlob in the CodeCache. Note that collection is // done to a static list - this is because CodeCache::blobs_do is defined // as void CodeCache::blobs_do(void f(CodeBlob* nm)) and hence requires // a C or static method. // // Usage :- // // CodeBlobCollector collector; // // collector.collect(); // JvmtiCodeBlobDesc* blob = collector.first(); // while (blob != NULL) { // : // blob = collector.next(); // } // class CodeBlobCollector : StackObj { private: GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected blobs int _pos; // iterator position // used during a collection static GrowableArray<JvmtiCodeBlobDesc*>* _global_code_blobs; static void do_blob(CodeBlob* cb); static void do_vtable_stub(VtableStub* vs); public: CodeBlobCollector() { _code_blobs = NULL; _pos = -1; } ~CodeBlobCollector() { if (_code_blobs != NULL) { for (int i=0; i<_code_blobs->length(); i++) { FreeHeap(_code_blobs->at(i)); } delete _code_blobs; } } // collect list of code blobs in the cache void collect(); // iteration support - return first code blob JvmtiCodeBlobDesc* first() { assert(_code_blobs != NULL, "not collected"); if (_code_blobs->length() == 0) { return NULL; } _pos = 0; return _code_blobs->at(0); } // iteration support - return next code blob JvmtiCodeBlobDesc* next() { assert(_pos >= 0, "iteration not started"); if (_pos+1 >= _code_blobs->length()) { return NULL; } return _code_blobs->at(++_pos); } }; // used during collection GrowableArray<JvmtiCodeBlobDesc*>* CodeBlobCollector::_global_code_blobs; // called for each CodeBlob in the CodeCache // // This function filters out nmethods as it is only interested in // other CodeBlobs. This function also filters out CodeBlobs that have // a duplicate starting address as previous blobs. This is needed to // handle the case where multiple stubs are generated into a single // BufferBlob. void CodeBlobCollector::do_blob(CodeBlob* cb) { // ignore nmethods if (cb->is_nmethod()) { return; } // exclude VtableStubs, which are processed separately if (cb->is_buffer_blob() && strcmp(cb->name(), "vtable chunks") == 0) { return; } // check if this starting address has been seen already - the // assumption is that stubs are inserted into the list before the // enclosing BufferBlobs. address addr = cb->code_begin(); for (int i=0; i<_global_code_blobs->length(); i++) { JvmtiCodeBlobDesc* scb = _global_code_blobs->at(i); if (addr == scb->code_begin()) { return; } } // record the CodeBlob details as a JvmtiCodeBlobDesc JvmtiCodeBlobDesc* scb = new JvmtiCodeBlobDesc(cb->name(), cb->code_begin(), cb->code_end()); _global_code_blobs->append(scb); } // called for each VtableStub in VtableStubs void CodeBlobCollector::do_vtable_stub(VtableStub* vs) { JvmtiCodeBlobDesc* scb = new JvmtiCodeBlobDesc(vs->is_vtable_stub() ? "vtable stub" : "itable stub", vs->code_begin(), vs->code_end()); _global_code_blobs->append(scb); } // collects a list of CodeBlobs in the CodeCache. // // The created list is growable array of JvmtiCodeBlobDesc - each one describes // a CodeBlob. Note that the list is static - this is because CodeBlob::blobs_do // requires a a C or static function so we can't use an instance function. This // isn't a problem as the iteration is serial anyway as we need the CodeCache_lock // to iterate over the code cache. // // Note that the CodeBlobs in the CodeCache will include BufferBlobs that may // contain multiple stubs. As a profiler is interested in the stubs rather than // the enclosing container we first iterate over the stub code descriptors so // that the stubs go into the list first. do_blob will then filter out the // enclosing blobs if the starting address of the enclosing blobs matches the // starting address of first stub generated in the enclosing blob. void CodeBlobCollector::collect() { assert_locked_or_safepoint(CodeCache_lock); assert(_global_code_blobs == NULL, "checking"); // create the global list _global_code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(50,true); // iterate over the stub code descriptors and put them in the list first. int index = 0; StubCodeDesc* desc; while ((desc = StubCodeDesc::desc_for_index(++index)) != NULL) { _global_code_blobs->append(new JvmtiCodeBlobDesc(desc->name(), desc->begin(), desc->end())); } // Vtable stubs are not described with StubCodeDesc, // process them separately VtableStubs::vtable_stub_do(do_vtable_stub); // next iterate over all the non-nmethod code blobs and add them to // the list - as noted above this will filter out duplicates and // enclosing blobs. CodeCache::blobs_do(do_blob); // make the global list the instance list so that it can be used // for other iterations. _code_blobs = _global_code_blobs; _global_code_blobs = NULL; } // Generate a DYNAMIC_CODE_GENERATED event for each non-nmethod code blob. jvmtiError JvmtiCodeBlobEvents::generate_dynamic_code_events(JvmtiEnv* env) { CodeBlobCollector collector; // First collect all the code blobs. This has to be done in a // single pass over the code cache with CodeCache_lock held because // there isn't any safe way to iterate over regular CodeBlobs since // they can be freed at any point. { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); collector.collect(); } // iterate over the collected list and post an event for each blob JvmtiCodeBlobDesc* blob = collector.first(); while (blob != NULL) { JvmtiExport::post_dynamic_code_generated(env, blob->name(), blob->code_begin(), blob->code_end()); blob = collector.next(); } return JVMTI_ERROR_NONE; } // Generate a COMPILED_METHOD_LOAD event for each nnmethod jvmtiError JvmtiCodeBlobEvents::generate_compiled_method_load_events(JvmtiEnv* env) { HandleMark hm; // Walk the CodeCache notifying for live nmethods. The code cache // may be changing while this is happening which is ok since newly // created nmethod will notify normally and nmethods which are freed // can be safely skipped. MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); nmethod* current = CodeCache::first_nmethod(); while (current != NULL) { // Only notify for live nmethods if (current->is_alive()) { // Lock the nmethod so it can't be freed nmethodLocker nml(current); // Don't hold the lock over the notify or jmethodID creation MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); current->get_and_cache_jmethod_id(); JvmtiExport::post_compiled_method_load(current); } current = CodeCache::next_nmethod(current); } return JVMTI_ERROR_NONE; } // create a C-heap allocated address location map for an nmethod void JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nmethod *nm, jvmtiAddrLocationMap** map_ptr, jint *map_length_ptr) { ResourceMark rm; jvmtiAddrLocationMap* map = NULL; jint map_length = 0; // Generate line numbers using PcDesc and ScopeDesc info methodHandle mh(nm->method()); if (!mh->is_native()) { PcDesc *pcd; int pcds_in_method; pcds_in_method = (nm->scopes_pcs_end() - nm->scopes_pcs_begin()); map = NEW_C_HEAP_ARRAY(jvmtiAddrLocationMap, pcds_in_method, mtInternal); address scopes_data = nm->scopes_data_begin(); for( pcd = nm->scopes_pcs_begin(); pcd < nm->scopes_pcs_end(); ++pcd ) { ScopeDesc sc0(nm, pcd->scope_decode_offset(), pcd->should_reexecute(), pcd->return_oop()); ScopeDesc *sd = &sc0; while( !sd->is_top() ) { sd = sd->sender(); } int bci = sd->bci(); if (bci != InvocationEntryBci) { assert(map_length < pcds_in_method, "checking"); map[map_length].start_address = (const void*)pcd->real_pc(nm); map[map_length].location = bci; ++map_length; } } } *map_ptr = map; *map_length_ptr = map_length; }