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8170098: AArch64: VM is extremely slow with JVMTI debugging enabled

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Reviewed-by: roland
This commit is contained in:
Andrew Haley 2016-11-21 17:29:17 +00:00
parent e52cf63f69
commit cbdf3828d8
1 changed files with 2 additions and 4 deletions
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6
hotspot/src/cpu/aarch64/vm/interp_masm_aarch64.cpp
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@ -407,10 +407,8 @@ void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register
// JVMTI events, such as single-stepping, are implemented partly by avoiding running
// compiled code in threads for which the event is enabled. Check here for
// interp_only_mode if these events CAN be enabled.
// interp_only is an int, on little endian it is sufficient to test the byte only
// Is a cmpl faster?
ldr(rscratch1, Address(rthread, JavaThread::interp_only_mode_offset()));
cbz(rscratch1, run_compiled_code);
ldrw(rscratch1, Address(rthread, JavaThread::interp_only_mode_offset()));
cbzw(rscratch1, run_compiled_code);
ldr(rscratch1, Address(method, Method::interpreter_entry_offset()));
br(rscratch1);
bind(run_compiled_code);