truffle: src/share/vm/code/compiledIC.cpp comparison

comparison src/share/vm/code/compiledIC.cpp @ 6725:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

author	coleenp
date	Sat, 01 Sep 2012 13:25:18 -0400
parents	aa3d708d67c4
children	18fb7da42534

comparison

equal deleted inserted replaced

-:36d1d483d5d6
+:da91efe96a93
 #include "code/icBuffer.hpp"
 #include "code/nmethod.hpp"
 #include "code/vtableStubs.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/linkResolver.hpp"
+#include "memory/metadataFactory.hpp"
 #include "memory/oopFactory.hpp"
-#include "oops/methodOop.hpp"
+#include "oops/method.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/symbol.hpp"
 #include "runtime/icache.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 // Every time a compiled IC is changed or its type is being accessed,
 // either the CompiledIC_lock must be set or we must be at a safe point.
+// Release the CompiledICHolder* associated with this call site is there is one.
+void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
+// This call site might have become stale so inspect it carefully.
+NativeCall* call = nativeCall_at(call_site->addr());
+if (is_icholder_entry(call->destination())) {
+NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
+InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
+}
+}
+bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
+// This call site might have become stale so inspect it carefully.
+NativeCall* call = nativeCall_at(call_site->addr());
+return is_icholder_entry(call->destination());
+}
 //-----------------------------------------------------------------------------
 // Low-level access to an inline cache. Private, since they might not be
 // MT-safe to use.
-void CompiledIC::set_cached_oop(oop cache) {
+void* CompiledIC::cached_value() const {
 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
-assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
+assert (!is_optimized(), "an optimized virtual call does not have a cached metadata");
-assert (cache == NULL || cache != badOop, "invalid oop");
+if (!is_in_transition_state()) {
+void* data = (void*)_value->data();
+// If we let the metadata value here be initialized to zero...
+assert(data != NULL || Universe::non_oop_word() == NULL,
+"no raw nulls in CompiledIC metadatas, because of patching races");
+return (data == (void*)Universe::non_oop_word()) ? NULL : data;
+} else {
+return InlineCacheBuffer::cached_value_for((CompiledIC *)this);
+}
+}
+void CompiledIC::internal_set_ic_destination(address entry_point, bool is_icstub, void* cache, bool is_icholder) {
+assert(entry_point != NULL, "must set legal entry point");
+assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+assert (!is_optimized() || cache == NULL, "an optimized virtual call does not have a cached metadata");
+assert (cache == NULL || cache != (Metadata*)badOopVal, "invalid metadata");
+assert(!is_icholder || is_icholder_entry(entry_point), "must be");
+// Don't use ic_destination for this test since that forwards
+// through ICBuffer instead of returning the actual current state of
+// the CompiledIC.
+if (is_icholder_entry(_ic_call->destination())) {
+// When patching for the ICStub case the cached value isn't
+// overwritten until the ICStub copied into the CompiledIC during
+// the next safepoint.  Make sure that the CompiledICHolder* is
+// marked for release at this point since it won't be identifiable
+// once the entry point is overwritten.
+InlineCacheBuffer::queue_for_release((CompiledICHolder*)_value->data());
+}
 if (TraceCompiledIC) {
 tty->print("  ");
 print_compiled_ic();
-tty->print_cr(" changing oop to " INTPTR_FORMAT, (address)cache);
+tty->print(" changing destination to " INTPTR_FORMAT, entry_point);
-}
+if (!is_optimized()) {
+tty->print(" changing cached %s to " INTPTR_FORMAT, is_icholder ? "icholder" : "metadata", (address)cache);
-if (cache == NULL)  cache = (oop)Universe::non_oop_word();
+}
+if (is_icstub) {
-*_oop_addr = cache;
+tty->print(" (icstub)");
-// fix up the relocations
+}
-RelocIterator iter = _oops;
+tty->cr();
-while (iter.next()) {
+}
-if (iter.type() == relocInfo::oop_type) {
-oop_Relocation* r = iter.oop_reloc();
+{
-if (r->oop_addr() == _oop_addr)
-r->fix_oop_relocation();
-}
-}
-return;
-}
-oop CompiledIC::cached_oop() const {
-assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
-assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
-if (!is_in_transition_state()) {
-oop data = *_oop_addr;
-// If we let the oop value here be initialized to zero...
-assert(data != NULL || Universe::non_oop_word() == NULL,
-"no raw nulls in CompiledIC oops, because of patching races");
-return (data == (oop)Universe::non_oop_word()) ? (oop)NULL : data;
-} else {
-return InlineCacheBuffer::cached_oop_for((CompiledIC *)this);
-}
-}
-void CompiledIC::set_ic_destination(address entry_point) {
-assert(entry_point != NULL, "must set legal entry point");
-assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
-if (TraceCompiledIC) {
-tty->print("  ");
-print_compiled_ic();
-tty->print_cr(" changing destination to " INTPTR_FORMAT, entry_point);
-}
 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
 #ifdef ASSERT
 CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
 assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
 #endif
 _ic_call->set_destination_mt_safe(entry_point);
 }
+if (is_optimized() || is_icstub) {
+// Optimized call sites don't have a cache value and ICStub call
+// sites only change the entry point.  Changing the value in that
+// case could lead to MT safety issues.
+assert(cache == NULL, "must be null");
+return;
+}
+if (cache == NULL)  cache = (void*)Universe::non_oop_word();
+_value->set_data((intptr_t)cache);
+}
+void CompiledIC::set_ic_destination(ICStub* stub) {
+internal_set_ic_destination(stub->code_begin(), true, NULL, false);
+}
 address CompiledIC::ic_destination() const {
 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
 if (!is_in_transition_state()) {
 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
 return InlineCacheBuffer::contains(_ic_call->destination());
 }
+bool CompiledIC::is_icholder_call() const {
+assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+return !_is_optimized && is_icholder_entry(ic_destination());
+}
 // Returns native address of 'call' instruction in inline-cache. Used by
 // the InlineCacheBuffer when it needs to find the stub.
 address CompiledIC::stub_address() const {
 assert(is_in_transition_state(), "should only be called when we are in a transition state");
 return _ic_call->destination();
 void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
 methodHandle method = call_info->selected_method();
 bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index());
 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
-assert(method->is_oop(), "cannot be NULL and must be oop");
 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic");
 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?");
 address entry;
 if (is_invoke_interface) {
 int index = klassItable::compute_itable_index(call_info->resolved_method()());
 entry = VtableStubs::create_stub(false, index, method());
 assert(entry != NULL, "entry not computed");
-klassOop k = call_info->resolved_method()->method_holder();
+Klass* k = call_info->resolved_method()->method_holder();
 assert(Klass::cast(k)->is_interface(), "sanity check");
 InlineCacheBuffer::create_transition_stub(this, k, entry);
 } else {
 // Can be different than method->vtable_index(), due to package-private etc.
 int vtable_index = call_info->vtable_index();
 // true if destination is megamorphic stub
 bool CompiledIC::is_megamorphic() const {
 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
 assert(!is_optimized(), "an optimized call cannot be megamorphic");
-// Cannot rely on cached_oop. It is either an interface or a method.
+// Cannot rely on cached_value. It is either an interface or a method.
 return VtableStubs::is_entry_point(ic_destination());
 }
 bool CompiledIC::is_call_to_compiled() const {
 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie
 // method is guaranteed to still exist, since we only remove methods after all inline caches
 // has been cleaned up
 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
 bool is_monomorphic = (cb != NULL && cb->is_nmethod());
-// Check that the cached_oop is a klass for non-optimized monomorphic calls
+// Check that the cached_value is a klass for non-optimized monomorphic calls
 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used
-// for calling directly to vep without using the inline cache (i.e., cached_oop == NULL)
+// for calling directly to vep without using the inline cache (i.e., cached_value == NULL)
 #ifdef ASSERT
-#ifdef TIERED
 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address());
 bool is_c1_method = caller->is_compiled_by_c1();
-#else
-#ifdef COMPILER1
-bool is_c1_method = true;
-#else
-bool is_c1_method = false;
-#endif // COMPILER1
-#endif // TIERED
 assert( is_c1_method ||
 !is_monomorphic ||
 is_optimized() ||
-(cached_oop() != NULL && cached_oop()->is_klass()), "sanity check");
+(cached_metadata() != NULL && cached_metadata()->is_klass()), "sanity check");
 #endif // ASSERT
 return is_monomorphic;
 }
 // must use unsafe because the destination can be a zombie (and we're cleaning)
 // and the print_compiled_ic code wants to know if site (in the non-zombie)
 // is to the interpreter.
 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob());
-assert(!is_call_to_interpreted ||  (cached_oop() != NULL && cached_oop()->is_compiledICHolder()), "sanity check");
+assert(!is_call_to_interpreted || (is_icholder_call() && cached_icholder() != NULL), "sanity check");
 } else {
 // Check if we are calling into our own codeblob (i.e., to a stub)
 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address());
 address dest = ic_destination();
 #ifdef ASSERT
 entry = SharedRuntime::get_resolve_opt_virtual_call_stub();
 } else {
 entry = SharedRuntime::get_resolve_virtual_call_stub();
 }
-// A zombie transition will always be safe, since the oop has already been set to NULL, so
+// A zombie transition will always be safe, since the metadata has already been set to NULL, so
 // we only need to patch the destination
 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint();
 if (safe_transition) {
-if (!is_optimized()) set_cached_oop(NULL);
 // Kill any leftover stub we might have too
 if (is_in_transition_state()) {
 ICStub* old_stub = ICStub_from_destination_address(stub_address());
 old_stub->clear();
 }
+if (is_optimized()) {
 set_ic_destination(entry);
+} else {
+set_ic_destination_and_value(entry, (void*)NULL);
+}
 } else {
 // Unsafe transition - create stub.
 InlineCacheBuffer::create_transition_stub(this, NULL, entry);
 }
 // We can't check this anymore. With lazy deopt we could have already
 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
 bool is_clean = false;
 address dest = ic_destination();
 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() ||
 dest == SharedRuntime::get_resolve_virtual_call_stub();
-assert(!is_clean || is_optimized() || cached_oop() == NULL, "sanity check");
+assert(!is_clean || is_optimized() || cached_value() == NULL, "sanity check");
 return is_clean;
 }
-void CompiledIC::set_to_monomorphic(const CompiledICInfo& info) {
+void CompiledIC::set_to_monomorphic(CompiledICInfo& info) {
 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
 // Updating a cache to the wrong entry can cause bugs that are very hard
 // to track down - if cache entry gets invalid - we just clean it. In
 // this way it is always the same code path that is responsible for
 // updating and resolving an inline cache
 //
 // In both of these cases the only thing being modifed is the jump/call target and these
 // transitions are mt_safe
 Thread *thread = Thread::current();
-if (info._to_interpreter) {
+if (info.to_interpreter()) {
 // Call to interpreter
 if (info.is_optimized() && is_optimized()) {
 assert(is_clean(), "unsafe IC path");
 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
 // the call analysis (callee structure) specifies that the call is optimized
 // (either because of CHA or the static target is final)
 // At code generation time, this call has been emitted as static call
 // Call via stub
-assert(info.cached_oop().not_null() && info.cached_oop()->is_method(), "sanity check");
+assert(info.cached_metadata() != NULL && info.cached_metadata()->is_method(), "sanity check");
 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address());
-methodHandle method (thread, (methodOop)info.cached_oop()());
+methodHandle method (thread, (Method*)info.cached_metadata());
 csc->set_to_interpreted(method, info.entry());
 if (TraceICs) {
 ResourceMark rm(thread);
 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s",
 instruction_address(),
 method->print_value_string());
 }
 } else {
 // Call via method-klass-holder
-assert(info.cached_oop().not_null(), "must be set");
+InlineCacheBuffer::create_transition_stub(this, info.claim_cached_icholder(), info.entry());
-InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
 if (TraceICs) {
 ResourceMark rm(thread);
-tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via mkh", instruction_address());
+tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via icholder ", instruction_address());
 }
 }
 } else {
 // Call to compiled code
-bool static_bound = info.is_optimized() || (info.cached_oop().is_null());
+bool static_bound = info.is_optimized() || (info.cached_metadata() == NULL);
 #ifdef ASSERT
 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry());
 assert (cb->is_nmethod(), "must be compiled!");
 #endif /* ASSERT */
 // non-verified entry point
 bool safe = SafepointSynchronize::is_at_safepoint() ||
 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean()));
 if (!safe) {
-InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
+InlineCacheBuffer::create_transition_stub(this, info.cached_metadata(), info.entry());
 } else {
+if (is_optimized()) {
 set_ic_destination(info.entry());
-if (!is_optimized()) set_cached_oop(info.cached_oop()());
+} else {
+set_ic_destination_and_value(info.entry(), info.cached_metadata());
+}
 }
 if (TraceICs) {
 ResourceMark rm(thread);
-assert(info.cached_oop() == NULL || info.cached_oop()()->is_klass(), "must be");
+assert(info.cached_metadata() == NULL || info.cached_metadata()->is_klass(), "must be");
 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s",
 instruction_address(),
-((klassOop)info.cached_oop()())->print_value_string(),
+((Klass*)info.cached_metadata())->print_value_string(),
 (safe) ? "" : "via stub");
 }
 }
 // We can't check this anymore. With lazy deopt we could have already
 // cleaned this IC entry before we even return. This is possible if
 KlassHandle receiver_klass,
 bool is_optimized,
 bool static_bound,
 CompiledICInfo& info,
 TRAPS) {
-info._is_optimized = is_optimized;
 nmethod* method_code = method->code();
 address entry = NULL;
 if (method_code != NULL) {
 // Call to compiled code
 if (static_bound || is_optimized) {
 entry      = method_code->entry_point();
 }
 }
 if (entry != NULL) {
 // Call to compiled code
-info._entry      = entry;
+info.set_compiled_entry(entry, (static_bound || is_optimized) ? NULL : receiver_klass(), is_optimized);
-if (static_bound || is_optimized) {
-info._cached_oop = Handle(THREAD, (oop)NULL);
-} else {
-info._cached_oop = receiver_klass;
-}
-info._to_interpreter = false;
 } else {
 // Note: the following problem exists with Compiler1:
 //   - at compile time we may or may not know if the destination is final
 //   - if we know that the destination is final, we will emit an optimized
-//     virtual call (no inline cache), and need a methodOop to make a call
+//     virtual call (no inline cache), and need a Method* to make a call
 //     to the interpreter
 //   - if we do not know if the destination is final, we emit a standard
 //     virtual call, and use CompiledICHolder to call interpreted code
 //     (no static call stub has been generated)
 //     However in that case we will now notice it is static_bound
 //     and convert the call into what looks to be an optimized
 //     virtual call. This causes problems in verifying the IC because
 //     it look vanilla but is optimized. Code in is_call_to_interpreted
 //     is aware of this and weakens its asserts.
-info._to_interpreter = true;
 // static_bound should imply is_optimized -- otherwise we have a
 // performance bug (statically-bindable method is called via
 // dynamically-dispatched call note: the reverse implication isn't
 // necessarily true -- the call may have been optimized based on compiler
 // analysis (static_bound is only based on "final" etc.)
 assert(!static_bound || is_optimized, "static_bound should imply is_optimized");
 #endif // TIERED
 #endif // COMPILER2
 if (is_optimized) {
 // Use stub entry
-info._entry      = method()->get_c2i_entry();
+info.set_interpreter_entry(method()->get_c2i_entry(), method());
-info._cached_oop = method;
 } else {
-// Use mkh entry
+// Use icholder entry
-oop holder = oopFactory::new_compiledICHolder(method, receiver_klass, CHECK);
+CompiledICHolder* holder = new CompiledICHolder(method(), receiver_klass());
-info._cached_oop = Handle(THREAD, holder);
+info.set_icholder_entry(method()->get_c2i_unverified_entry(), holder);
-info._entry      = method()->get_c2i_unverified_entry();
+}
 }
-}
+assert(info.is_optimized() == is_optimized, "must agree");
 }
-inline static RelocIterator parse_ic(nmethod* nm, address ic_call, oop* &_oop_addr, bool *is_optimized) {
+bool CompiledIC::is_icholder_entry(address entry) {
-address  first_oop = NULL;
+CodeBlob* cb = CodeCache::find_blob_unsafe(entry);
-// Mergers please note: Sun SC5.x CC insists on an lvalue for a reference parameter.
+return (cb != NULL && cb->is_adapter_blob());
-nmethod* tmp_nm = nm;
+}
-return virtual_call_Relocation::parse_ic(tmp_nm, ic_call, first_oop, _oop_addr, is_optimized);
-}
+CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
-CompiledIC::CompiledIC(NativeCall* ic_call)
+: _ic_call(call)
-: _ic_call(ic_call),
-_oops(parse_ic(NULL, ic_call->instruction_address(), _oop_addr, &_is_optimized))
 {
-}
+address ic_call = call->instruction_address();
+assert(ic_call != NULL, "ic_call address must be set");
-CompiledIC::CompiledIC(Relocation* ic_reloc)
+assert(nm != NULL, "must pass nmethod");
-: _ic_call(nativeCall_at(ic_reloc->addr())),
+assert(nm->contains(ic_call),   "must be in nmethod");
-_oops(parse_ic(ic_reloc->code(), ic_reloc->addr(), _oop_addr, &_is_optimized))
-{
+// search for the ic_call at the given address
-assert(ic_reloc->type() == relocInfo::virtual_call_type ||
+RelocIterator iter(nm, ic_call, ic_call+1);
-ic_reloc->type() == relocInfo::opt_virtual_call_type, "wrong reloc. info");
+bool ret = iter.next();
+assert(ret == true, "relocInfo must exist at this address");
+assert(iter.addr() == ic_call, "must find ic_call");
+if (iter.type() == relocInfo::virtual_call_type) {
+virtual_call_Relocation* r = iter.virtual_call_reloc();
+_is_optimized = false;
+_value = nativeMovConstReg_at(r->cached_value());
+} else {
+assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
+_is_optimized = true;
+_value = NULL;
+}
 }
 // ----------------------------------------------------------------------------
 tty->cr();
 }
 void CompiledIC::print_compiled_ic() {
-tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT,
+tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT " cached_value " INTPTR_FORMAT,
-instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination());
+instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination(), is_optimized() ? NULL : cached_value());
 }
 void CompiledStaticCall::print() {
 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address());

Mercurial > hg > truffle

comparison src/share/vm/code/compiledIC.cpp @ 6725:da91efe96a93