Mercurial > hg > graal-compiler
diff src/share/vm/runtime/interfaceSupport.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 821269eca479 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/interfaceSupport.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,269 @@ +/* + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_interfaceSupport.cpp.incl" + + +// Implementation of InterfaceSupport + +#ifdef ASSERT + +long InterfaceSupport::_number_of_calls = 0; +long InterfaceSupport::_scavenge_alot_counter = 1; +long InterfaceSupport::_fullgc_alot_counter = 1; +long InterfaceSupport::_fullgc_alot_invocation = 0; + +Histogram* RuntimeHistogram; + +RuntimeHistogramElement::RuntimeHistogramElement(const char* elementName) { + static volatile jint RuntimeHistogram_lock = 0; + _name = elementName; + uintx count = 0; + + while (Atomic::cmpxchg(1, &RuntimeHistogram_lock, 0) != 0) { + while (OrderAccess::load_acquire(&RuntimeHistogram_lock) != 0) { + count +=1; + if ( (WarnOnStalledSpinLock > 0) + && (count % WarnOnStalledSpinLock == 0)) { + warning("RuntimeHistogram_lock seems to be stalled"); + } + } + } + + if (RuntimeHistogram == NULL) { + RuntimeHistogram = new Histogram("VM Runtime Call Counts",200); + } + + RuntimeHistogram->add_element(this); + Atomic::dec(&RuntimeHistogram_lock); +} + +void InterfaceSupport::trace(const char* result_type, const char* header) { + tty->print_cr("%6d %s", _number_of_calls, header); +} + +void InterfaceSupport::gc_alot() { + Thread *thread = Thread::current(); + if (thread->is_VM_thread()) return; // Avoid concurrent calls + // Check for new, not quite initialized thread. A thread in new mode cannot initiate a GC. + JavaThread *current_thread = (JavaThread *)thread; + if (current_thread->active_handles() == NULL) return; + + if (is_init_completed()) { + + if (++_fullgc_alot_invocation < FullGCALotStart) { + return; + } + + // Use this line if you want to block at a specific point, + // e.g. one number_of_calls/scavenge/gc before you got into problems + if (FullGCALot) _fullgc_alot_counter--; + + // Check if we should force a full gc + if (_fullgc_alot_counter == 0) { + // Release dummy so objects are forced to move + if (!Universe::release_fullgc_alot_dummy()) { + warning("FullGCALot: Unable to release more dummies at bottom of heap"); + } + HandleMark hm(thread); + Universe::heap()->collect(GCCause::_full_gc_alot); + unsigned int invocations = Universe::heap()->total_full_collections(); + // Compute new interval + if (FullGCALotInterval > 1) { + _fullgc_alot_counter = 1+(long)((double)FullGCALotInterval*os::random()/(max_jint+1.0)); + if (PrintGCDetails && Verbose) { + tty->print_cr("Full gc no: %u\tInterval: %d", invocations, + _fullgc_alot_counter); + } + } else { + _fullgc_alot_counter = 1; + } + // Print progress message + if (invocations % 100 == 0) { + if (PrintGCDetails && Verbose) tty->print_cr("Full gc no: %u", invocations); + } + } else { + if (ScavengeALot) _scavenge_alot_counter--; + // Check if we should force a scavenge + if (_scavenge_alot_counter == 0) { + HandleMark hm(thread); + Universe::heap()->collect(GCCause::_scavenge_alot); + unsigned int invocations = Universe::heap()->total_collections() - Universe::heap()->total_full_collections(); + // Compute new interval + if (ScavengeALotInterval > 1) { + _scavenge_alot_counter = 1+(long)((double)ScavengeALotInterval*os::random()/(max_jint+1.0)); + if (PrintGCDetails && Verbose) { + tty->print_cr("Scavenge no: %u\tInterval: %d", invocations, + _scavenge_alot_counter); + } + } else { + _scavenge_alot_counter = 1; + } + // Print progress message + if (invocations % 1000 == 0) { + if (PrintGCDetails && Verbose) tty->print_cr("Scavenge no: %u", invocations); + } + } + } + } +} + + +vframe* vframe_array[50]; +int walk_stack_counter = 0; + +void InterfaceSupport::walk_stack_from(vframe* start_vf) { + // walk + int i = 0; + for (vframe* f = start_vf; f; f = f->sender() ) { + if (i < 50) vframe_array[i++] = f; + } +} + + +void InterfaceSupport::walk_stack() { + JavaThread* thread = JavaThread::current(); + walk_stack_counter++; + if (!thread->has_last_Java_frame()) return; + ResourceMark rm(thread); + RegisterMap reg_map(thread); + walk_stack_from(thread->last_java_vframe(®_map)); +} + + +# ifdef ENABLE_ZAP_DEAD_LOCALS + +static int zap_traversals = 0; + +void InterfaceSupport::zap_dead_locals_old() { + JavaThread* thread = JavaThread::current(); + if (zap_traversals == -1) // edit constant for debugging + warning("I am here"); + int zap_frame_count = 0; // count frames to help debugging + for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) { + sfs.current()->zap_dead_locals(thread, sfs.register_map()); + ++zap_frame_count; + } + ++zap_traversals; +} + +# endif + + +int deoptimizeAllCounter = 0; +int zombieAllCounter = 0; + + +void InterfaceSupport::zombieAll() { + if (is_init_completed() && zombieAllCounter > ZombieALotInterval) { + zombieAllCounter = 0; + VM_ZombieAll op; + VMThread::execute(&op); + } else { + zombieAllCounter++; + } +} + +void InterfaceSupport::deoptimizeAll() { + if (is_init_completed() ) { + if (DeoptimizeALot && deoptimizeAllCounter > DeoptimizeALotInterval) { + deoptimizeAllCounter = 0; + VM_DeoptimizeAll op; + VMThread::execute(&op); + } else if (DeoptimizeRandom && (deoptimizeAllCounter & 0x1f) == (os::random() & 0x1f)) { + VM_DeoptimizeAll op; + VMThread::execute(&op); + } + } + deoptimizeAllCounter++; +} + + +void InterfaceSupport::stress_derived_pointers() { +#ifdef COMPILER2 + JavaThread *thread = JavaThread::current(); + if (!is_init_completed()) return; + ResourceMark rm(thread); + bool found = false; + for (StackFrameStream sfs(thread); !sfs.is_done() && !found; sfs.next()) { + CodeBlob* cb = sfs.current()->cb(); + if (cb != NULL && cb->oop_maps() ) { + // Find oopmap for current method + OopMap* map = cb->oop_map_for_return_address(sfs.current()->pc()); + assert(map != NULL, "no oopmap found for pc"); + found = map->has_derived_pointer(); + } + } + if (found) { + // $$$ Not sure what to do here. + /* + Scavenge::invoke(0); + */ + } +#endif +} + + +void InterfaceSupport::verify_stack() { + JavaThread* thread = JavaThread::current(); + ResourceMark rm(thread); + // disabled because it throws warnings that oop maps should only be accessed + // in VM thread or during debugging + + if (!thread->has_pending_exception()) { + // verification does not work if there are pending exceptions + StackFrameStream sfs(thread); + CodeBlob* cb = sfs.current()->cb(); + // In case of exceptions we might not have a runtime_stub on + // top of stack, hence, all callee-saved registers are not going + // to be setup correctly, hence, we cannot do stack verify + if (cb != NULL && !(cb->is_runtime_stub() || cb->is_uncommon_trap_stub())) return; + + for (; !sfs.is_done(); sfs.next()) { + sfs.current()->verify(sfs.register_map()); + } + } +} + + +void InterfaceSupport::verify_last_frame() { + JavaThread* thread = JavaThread::current(); + ResourceMark rm(thread); + RegisterMap reg_map(thread); + frame fr = thread->last_frame(); + fr.verify(®_map); +} + + +#endif // ASSERT + + +void InterfaceSupport_init() { +#ifdef ASSERT + if (ScavengeALot || FullGCALot) { + srand(ScavengeALotInterval * FullGCALotInterval); + } +#endif +}