graal-jvmci-8: src/share/vm/prims/jvmtiCodeBlobEvents.cpp comparison

comparison src/share/vm/prims/jvmtiCodeBlobEvents.cpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	72088be4b386

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--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+* CA 95054 USA or visit www.sun.com if you need additional information or
+* have any questions.
+*
+*/
+# include "incls/_precompiled.incl"
+# include "incls/_jvmtiCodeBlobEvents.cpp.incl"
+// 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);
+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;
+}
+// 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->instructions_begin();
+for (int i=0; i<_global_code_blobs->length(); i++) {
+JvmtiCodeBlobDesc* scb = _global_code_blobs->at(i);
+if (addr == scb->code_begin()) {
+return;
+}
+}
+// we must name the CodeBlob - some CodeBlobs already have names :-
+// - stubs used by compiled code to call a (static) C++ runtime routine
+// - non-relocatable machine code such as the interpreter, stubroutines, etc.
+// - various singleton blobs
+//
+// others are unnamed so we create a name :-
+// - OSR adapter (interpreter frame that has been on-stack replaced)
+// - I2C and C2I adapters
+const char* name = NULL;
+if (cb->is_runtime_stub()) {
+name = ((RuntimeStub*)cb)->name();
+}
+if (cb->is_buffer_blob()) {
+name = ((BufferBlob*)cb)->name();
+}
+if (cb->is_deoptimization_stub() || cb->is_safepoint_stub()) {
+name = ((SingletonBlob*)cb)->name();
+}
+if (cb->is_uncommon_trap_stub() || cb->is_exception_stub()) {
+name = ((SingletonBlob*)cb)->name();
+}
+// record the CodeBlob details as a JvmtiCodeBlobDesc
+JvmtiCodeBlobDesc* scb = new JvmtiCodeBlobDesc(name, cb->instructions_begin(),
+cb->instructions_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) 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()));
+}
+// 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
+{
+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;
+}
+// Support class to describe a nmethod in the CodeCache
+class nmethodDesc: public CHeapObj {
+private:
+methodHandle _method;
+address _code_begin;
+address _code_end;
+jvmtiAddrLocationMap* _map;
+jint _map_length;
+public:
+nmethodDesc(methodHandle method, address code_begin, address code_end,
+jvmtiAddrLocationMap* map, jint map_length) {
+_method = method;
+_code_begin = code_begin;
+_code_end = code_end;
+_map = map;
+_map_length = map_length;
+}
+methodHandle method() const           { return _method; }
+address code_begin() const            { return _code_begin; }
+address code_end() const              { return _code_end; }
+jvmtiAddrLocationMap* map() const     { return _map; }
+jint map_length() const               { return _map_length; }
+};
+// Support class to collect a list of the nmethod CodeBlobs in
+// the CodeCache.
+//
+// Usage :-
+//
+// nmethodCollector collector;
+//
+// collector.collect();
+// JvmtiCodeBlobDesc* blob = collector.first();
+// while (blob != NULL) {
+//   :
+//   blob = collector.next();
+// }
+//
+class nmethodCollector : StackObj {
+private:
+GrowableArray<nmethodDesc*>* _nmethods;           // collect nmethods
+int _pos;                                         // iteration support
+// used during a collection
+static GrowableArray<nmethodDesc*>* _global_nmethods;
+static void do_nmethod(nmethod* nm);
+public:
+nmethodCollector() {
+_nmethods = NULL;
+_pos = -1;
+}
+~nmethodCollector() {
+if (_nmethods != NULL) {
+for (int i=0; i<_nmethods->length(); i++) {
+nmethodDesc* blob = _nmethods->at(i);
+if (blob->map()!= NULL) {
+FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, blob->map());
+}
+}
+delete _nmethods;
+}
+}
+// collect list of nmethods in the cache
+void collect();
+// iteration support - return first code blob
+nmethodDesc* first() {
+assert(_nmethods != NULL, "not collected");
+if (_nmethods->length() == 0) {
+return NULL;
+}
+_pos = 0;
+return _nmethods->at(0);
+}
+// iteration support - return next code blob
+nmethodDesc* next() {
+assert(_pos >= 0, "iteration not started");
+if (_pos+1 >= _nmethods->length()) {
+return NULL;
+}
+return _nmethods->at(++_pos);
+}
+};
+// used during collection
+GrowableArray<nmethodDesc*>* nmethodCollector::_global_nmethods;
+// called for each nmethod in the CodeCache
+//
+// This function simply adds a descriptor for each nmethod to the global list.
+void nmethodCollector::do_nmethod(nmethod* nm) {
+// ignore zombies
+if (!nm->is_alive()) {
+return;
+}
+assert(nm->method() != NULL, "checking");
+// create the location map for the nmethod.
+jvmtiAddrLocationMap* map;
+jint map_length;
+JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &map, &map_length);
+// record the nmethod details
+methodHandle mh(nm->method());
+nmethodDesc* snm = new nmethodDesc(mh,
+nm->code_begin(),
+nm->code_end(),
+map,
+map_length);
+_global_nmethods->append(snm);
+}
+// collects a list of nmethod in the CodeCache.
+//
+// The created list is growable array of nmethodDesc - each one describes
+// a nmethod and includs its JVMTI address location map.
+void nmethodCollector::collect() {
+assert_locked_or_safepoint(CodeCache_lock);
+assert(_global_nmethods == NULL, "checking");
+// create the list
+_global_nmethods = new (ResourceObj::C_HEAP) GrowableArray<nmethodDesc*>(100,true);
+// any a descriptor for each nmethod to the list.
+CodeCache::nmethods_do(do_nmethod);
+// make the list the instance list
+_nmethods = _global_nmethods;
+_global_nmethods = NULL;
+}
+// Generate a COMPILED_METHOD_LOAD event for each nnmethod
+jvmtiError JvmtiCodeBlobEvents::generate_compiled_method_load_events(JvmtiEnv* env) {
+HandleMark hm;
+nmethodCollector collector;
+// first collect all nmethods
+{
+MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+collector.collect();
+}
+// iterate over the  list and post an event for each nmethod
+nmethodDesc* nm_desc = collector.first();
+while (nm_desc != NULL) {
+methodOop method = nm_desc->method()();
+jmethodID mid = method->jmethod_id();
+assert(mid != NULL, "checking");
+JvmtiExport::post_compiled_method_load(env, mid,
+(jint)(nm_desc->code_end() - nm_desc->code_begin()),
+nm_desc->code_begin(), nm_desc->map_length(),
+nm_desc->map());
+nm_desc = collector.next();
+}
+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);
+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());
+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;
+}

Mercurial > hg > graal-jvmci-8

comparison src/share/vm/prims/jvmtiCodeBlobEvents.cpp @ 0:a61af66fc99e jdk7-b24