src/share/vm/classfile/vmSymbols.cpp
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8132457 Cdiff src/share/vm/classfile/vmSymbols.cpp
src/share/vm/classfile/vmSymbols.cpp
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*** 415,426 ****
default:
return 0;
}
}
! bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
switch (id) {
case vmIntrinsics::_isInstance:
case vmIntrinsics::_isAssignableFrom:
case vmIntrinsics::_getModifiers:
case vmIntrinsics::_isInterface:
--- 415,477 ----
default:
return 0;
}
}
! bool vmIntrinsics::is_disabled_by_flags(methodHandle method, methodHandle compilation_context) {
! vmIntrinsics::ID id = method->intrinsic_id();
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
+
+ // Check if the intrinsic corresponding to 'method' has been disabled on
+ // the command line by using the DisableIntrinsic flag (either globally
+ // or on a per-method level, see src/share/vm/compiler/abstractCompiler.hpp
+ // for details).
+ // Usually, the compilation context is the caller of the method 'method'.
+ // The only case when for a non-recursive method 'method' the compilation context
+ // is not the caller of the 'method' (but it is the method itself) is
+ // java.lang.ref.Referene::get.
+ // For java.lang.ref.Reference::get, the intrinsic version is used
+ // instead of the compiled version so that the value in the referent
+ // field can be registered by the G1 pre-barrier code. The intrinsified
+ // version of Reference::get also adds a memory barrier to prevent
+ // commoning reads from the referent field across safepoint since GC
+ // can change the referent field's value. See Compile::Compile()
+ // in src/share/vm/opto/compile.cpp or
+ // GraphBuilder::GraphBuilder() in src/share/vm/c1/c1_GraphBuilder.cpp
+ // for more details.
+ ccstr disable_intr = NULL;
+ if ((DisableIntrinsic[0] != '\0' && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) ||
+ (!compilation_context.is_null() &&
+ CompilerOracle::has_option_value(compilation_context, "DisableIntrinsic", disable_intr) &&
+ strstr(disable_intr, vmIntrinsics::name_at(id)) != NULL)
+ ) {
+ return true;
+ }
+
+ // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
+ // the following switch statement.
+ if (!InlineNatives) {
+ switch (id) {
+ case vmIntrinsics::_indexOf:
+ case vmIntrinsics::_compareTo:
+ case vmIntrinsics::_equals:
+ case vmIntrinsics::_equalsC:
+ case vmIntrinsics::_getAndAddInt:
+ case vmIntrinsics::_getAndAddLong:
+ case vmIntrinsics::_getAndSetInt:
+ case vmIntrinsics::_getAndSetLong:
+ case vmIntrinsics::_getAndSetObject:
+ case vmIntrinsics::_loadFence:
+ case vmIntrinsics::_storeFence:
+ case vmIntrinsics::_fullFence:
+ case vmIntrinsics::_Reference_get:
+ break;
+ default:
+ return true;
+ }
+ }
+
switch (id) {
case vmIntrinsics::_isInstance:
case vmIntrinsics::_isAssignableFrom:
case vmIntrinsics::_getModifiers:
case vmIntrinsics::_isInterface:
*** 428,437 ****
--- 479,489 ----
case vmIntrinsics::_isPrimitive:
case vmIntrinsics::_getSuperclass:
case vmIntrinsics::_Class_cast:
case vmIntrinsics::_getLength:
case vmIntrinsics::_newArray:
+ case vmIntrinsics::_getClass:
if (!InlineClassNatives) return true;
break;
case vmIntrinsics::_currentThread:
case vmIntrinsics::_isInterrupted:
if (!InlineThreadNatives) return true;
*** 520,529 ****
--- 572,587 ----
case vmIntrinsics::_getAndAddInt:
case vmIntrinsics::_getAndAddLong:
case vmIntrinsics::_getAndSetInt:
case vmIntrinsics::_getAndSetLong:
case vmIntrinsics::_getAndSetObject:
+ case vmIntrinsics::_loadFence:
+ case vmIntrinsics::_storeFence:
+ case vmIntrinsics::_fullFence:
+ case vmIntrinsics::_compareAndSwapObject:
+ case vmIntrinsics::_compareAndSwapLong:
+ case vmIntrinsics::_compareAndSwapInt:
if (!InlineUnsafeOps) return true;
break;
case vmIntrinsics::_getShortUnaligned:
case vmIntrinsics::_getCharUnaligned:
case vmIntrinsics::_getIntUnaligned:
src/share/vm/classfile/vmSymbols.cpp
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