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8073705: more performance issues in class redefinition

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Optimize the method pointer adjustments for prev klass versions and MNT

Reviewed-by: dcubed, coleenp
This commit is contained in:
Serguei Spitsyn 2015-04-27 19:51:00 -07:00
parent 8cb760c280
commit f7c143cbb2
7 changed files with 36 additions and 94 deletions
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27
hotspot/src/share/vm/classfile/javaClasses.cpp
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@ -2831,33 +2831,6 @@ bool java_lang_invoke_MemberName::is_method(oop mname) {
return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
}
#if INCLUDE_JVMTI
// Can be executed on VM thread only
void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method,
Method* new_method, bool* trace_name_printed) {
assert(is_method(mname), "wrong type");
assert(Thread::current()->is_VM_thread(), "not VM thread");
Method* target = (Method*)mname->address_field(_vmtarget_offset);
if (target == old_method) {
mname->address_field_put(_vmtarget_offset, (address)new_method);
if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) {
if (!(*trace_name_printed)) {
// RC_TRACE_MESG macro has an embedded ResourceMark
RC_TRACE_MESG(("adjust: name=%s",
old_method->method_holder()->external_name()));
*trace_name_printed = true;
}
// RC_TRACE macro has an embedded ResourceMark
RC_TRACE(0x00400000, ("MemberName method update: %s(%s)",
new_method->name()->as_C_string(),
new_method->signature()->as_C_string()));
}
}
}
#endif // INCLUDE_JVMTI
void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
assert(is_instance(mname), "wrong type");
// check the type of the vmtarget