Mercurial > hg > graal-compiler
view src/cpu/x86/vm/vtableStubs_x86_32.cpp @ 609:ea20d7ce26b0
6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
Summary: Check for NULL return values from jvmti_thread_state() and state_for() and return a JVM TI error code as appropriate.
Reviewed-by: coleenp, swamyv
author | dcubed |
---|---|
date | Mon, 02 Mar 2009 14:00:23 -0700 |
parents | 9ee9cf798b59 |
children | 9adddb8c0fc8 |
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/* * Copyright 1997-2008 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/_vtableStubs_x86_32.cpp.incl" // machine-dependent part of VtableStubs: create VtableStub of correct size and // initialize its code #define __ masm-> #ifndef PRODUCT extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index); #endif // used by compiler only; may use only caller saved registers rax, rbx, rcx. // rdx holds first int arg, rsi, rdi, rbp are callee-save & must be preserved. // Leave receiver in rcx; required behavior when +OptoArgsInRegisters // is modifed to put first oop in rcx. // VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { const int i486_code_length = VtableStub::pd_code_size_limit(true); VtableStub* s = new(i486_code_length) VtableStub(true, vtable_index); ResourceMark rm; CodeBuffer cb(s->entry_point(), i486_code_length); MacroAssembler* masm = new MacroAssembler(&cb); #ifndef PRODUCT if (CountCompiledCalls) { __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); } #endif /* PRODUCT */ // get receiver (need to skip return address on top of stack) assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); // get receiver klass address npe_addr = __ pc(); __ movptr(rax, Address(rcx, oopDesc::klass_offset_in_bytes())); // compute entry offset (in words) int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); #ifndef PRODUCT if (DebugVtables) { Label L; // check offset vs vtable length __ cmpl(Address(rax, instanceKlass::vtable_length_offset()*wordSize), vtable_index*vtableEntry::size()); __ jcc(Assembler::greater, L); __ movl(rbx, vtable_index); __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), rcx, rbx); __ bind(L); } #endif // PRODUCT const Register method = rbx; // load methodOop and target address __ movptr(method, Address(rax, entry_offset*wordSize + vtableEntry::method_offset_in_bytes())); if (DebugVtables) { Label L; __ cmpptr(method, (int32_t)NULL_WORD); __ jcc(Assembler::equal, L); __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); __ jcc(Assembler::notZero, L); __ stop("Vtable entry is NULL"); __ bind(L); } // rax,: receiver klass // method (rbx): methodOop // rcx: receiver address ame_addr = __ pc(); __ jmp( Address(method, methodOopDesc::from_compiled_offset())); masm->flush(); s->set_exception_points(npe_addr, ame_addr); return s; } VtableStub* VtableStubs::create_itable_stub(int vtable_index) { // Note well: pd_code_size_limit is the absolute minimum we can get away with. If you // add code here, bump the code stub size returned by pd_code_size_limit! const int i486_code_length = VtableStub::pd_code_size_limit(false); VtableStub* s = new(i486_code_length) VtableStub(false, vtable_index); ResourceMark rm; CodeBuffer cb(s->entry_point(), i486_code_length); MacroAssembler* masm = new MacroAssembler(&cb); // Entry arguments: // rax,: Interface // rcx: Receiver #ifndef PRODUCT if (CountCompiledCalls) { __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); } #endif /* PRODUCT */ // get receiver (need to skip return address on top of stack) assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); // get receiver klass (also an implicit null-check) address npe_addr = __ pc(); __ movptr(rbx, Address(rcx, oopDesc::klass_offset_in_bytes())); __ mov(rsi, rbx); // Save klass in free register // Most registers are in use, so save a few __ push(rdx); // compute itable entry offset (in words) const int base = instanceKlass::vtable_start_offset() * wordSize; assert(vtableEntry::size() * wordSize == 4, "adjust the scaling in the code below"); __ movl(rdx, Address(rbx, instanceKlass::vtable_length_offset() * wordSize)); // Get length of vtable __ lea(rbx, Address(rbx, rdx, Address::times_ptr, base)); if (HeapWordsPerLong > 1) { // Round up to align_object_offset boundary __ round_to(rbx, BytesPerLong); } Label hit, next, entry, throw_icce; __ jmpb(entry); __ bind(next); __ addptr(rbx, itableOffsetEntry::size() * wordSize); __ bind(entry); // If the entry is NULL then we've reached the end of the table // without finding the expected interface, so throw an exception __ movptr(rdx, Address(rbx, itableOffsetEntry::interface_offset_in_bytes())); __ testptr(rdx, rdx); __ jcc(Assembler::zero, throw_icce); __ cmpptr(rax, rdx); __ jcc(Assembler::notEqual, next); // We found a hit, move offset into rbx, __ movl(rdx, Address(rbx, itableOffsetEntry::offset_offset_in_bytes())); // Compute itableMethodEntry. const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes(); // Get methodOop and entrypoint for compiler const Register method = rbx; __ movptr(method, Address(rsi, rdx, Address::times_1, method_offset)); // Restore saved register, before possible trap. __ pop(rdx); // method (rbx): methodOop // rcx: receiver #ifdef ASSERT if (DebugVtables) { Label L1; __ cmpptr(method, (int32_t)NULL_WORD); __ jcc(Assembler::equal, L1); __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); __ jcc(Assembler::notZero, L1); __ stop("methodOop is null"); __ bind(L1); } #endif // ASSERT address ame_addr = __ pc(); __ jmp(Address(method, methodOopDesc::from_compiled_offset())); __ bind(throw_icce); // Restore saved register __ pop(rdx); __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); masm->flush(); guarantee(__ pc() <= s->code_end(), "overflowed buffer"); s->set_exception_points(npe_addr, ame_addr); return s; } int VtableStub::pd_code_size_limit(bool is_vtable_stub) { if (is_vtable_stub) { // Vtable stub size return (DebugVtables ? 210 : 16) + (CountCompiledCalls ? 6 : 0); } else { // Itable stub size return (DebugVtables ? 144 : 64) + (CountCompiledCalls ? 6 : 0); } } int VtableStub::pd_code_alignment() { return wordSize; }