if (JvmtiExport::can_post_field_access()) { // Check to see if a field access watch has been set before we // take the fast path.
__ cmp32(ExternalAddress((address) JvmtiExport::get_field_access_count_addr()), 0);
_ jcc::notZero,slow;
}
__ mov(rax, rcx);
__ andptr(rax, 1); // rax, must end up 0
__ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize)); // obj, notice rax, is 0. // rdx is data dependent on rcx.
__ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
speculative_load_pclist[count] = __ pc(); switch< =other0}ิว/> case T_BOOLEAN: __ movzbl (rax, Address(rdx, rax, Address::times_1)); break; case T_BYTE: __ movsbl (rax, Address(rdx, rax, Address::times_1)); break; case T_CHAR: __ movzwl (rax, Address(rdx, rax, Address::times_1)); break; case T_SHORT: __ movswl (rax, Address(rdx, rax, Address::times_1)); break; case T_INT: __ movl (rax, Address(rdx, rax, Address::times_1)); break; default: ShouldNotReachHere();
}
Address ca1;
__ lea(rdx, counter);
__ xorptr(rdx, rax);
__ xorptr(rdx, rax);
__ cmp32(rcx, Address(rdx, 0)); // ca1 is the same as ca because // rax, ^ counter_addr ^ rax, = address // ca1 is data dependent on rax,.
__ jcc (Assembler::notEqual, slow);
#ifndef _WINDOWS
__ ret (0); #else // __stdcall calling convention
_ ret(*wordSize)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22 #endif
if (JvmtiExport::can_post_field_access()) { // Check to see if a field access watch has been set before we // take the fast path.
__ cmp32(ExternalAddress((address) JvmtiExport::get_field_access_count_addr()), 0);
__ jcc(Assembler::notZero, slow);
}
__ mov(rax, rcx);
__ andptr(rax, 1); // rax, must end up 0
__ movptr(rdx, Address(rsp, rax, Address::times_1, 3*wordSize)); // obj, notice rax, is 0. // rdx is data dependent on rcx.
__ movptr(rsi, Address(rsp, 4*wordSize)); // jfieldID
__ lea(rsi, counter);
__ xorptr(rsi, rdx);
__ xorptr(rsi, rax);
__ xorptr(rsi, rdx);
__ xorptr(rsi, rax);
__ cmp32(rcx, Address(rsi, 0)); // ca1 is the same as ca because // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address // ca1 is data dependent on both rax, and rdx.
__ jcc (Assembler::notEqual, slow);
__ pop (rsi);
#ifndef _WINDOWS
__ ret (0); #else // __stdcall calling convention
__ ret (3*wordSize); #endif
if (JvmtiExport::can_post_field_access()) { // Check to see if a field access watch has been set before we // take the fast path.
__ cmp32(ExternalAddress((address) JvmtiExport::get_field_access_count_addr()), 0);
__ jcc(Assembler::notZero, slow);
}
__ mov(rax, rcx);
__ andptr(rax, 1); // rax, must end up 0
__ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize)); // obj, notice rax, is 0. // rdx is data dependent on rcx.
__ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
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