After the push of the changes for 7009266, the nightly test:

nsk/stress/jni/stress002 is failing with the following assertion failure:

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/tmp/jprt/P1/B/171345.jc234399/source/src/share/vm/opto/type.hpp:1096), pid=1207, tid=35
# assert(_base == Long) failed: Not a Long
#
# JRE version: 7.0-b136
# Java VM: Java HotSpot(TM) 64-Bit Server VM (21.0-b05-internal-201104071713.jc234399.7009266_push-fastdebug mixed mode solaris-sparc compressed oops)
# Core dump written. Default location: /export/local/46778.JDK7.NIGHTLY.VM+solaris-sparcv9_vm_server_mixed_nsk.stress.testlist/results/ResultDir/jnistress002/core or core.1207
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp

on solaris-sparcv9, linux-amd64, and solaris-amd64. The stack trace is:

Current thread (0x000000010aaa3800): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=35, stack(0xffffffff6dc00000,0xffffffff6dd00000)]

Stack: [0xffffffff6dc00000,0xffffffff6dd00000], sp=0xffffffff6dcfc510, free space=1009k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x122e2ec] void VMError::report_and_die()+0x794;; void VMError::report_and_die()+0x794
V [libjvm.so+0x6e6f40] void report_vm_error(const char*,int,const char*,const char*)+0x78;; void report_vm_error(const char*,int,const char*,const char*)+0x78
V [libjvm.so+0x222cb0] const TypeLong*Type::is_long()const+0x40;; const TypeLong*Type::is_long()const+0x40
V [libjvm.so+0x10d1d70] const Type*CmpLNode::sub(const Type*,const Type*)const+0x30;; const Type*CmpLNode::sub(const Type*,const Type*)const+0x30
V [libjvm.so+0xf5a63c] Node*PhaseGVN::transform_no_reclaim(Node*)+0x144;; Node*PhaseGVN::transform_no_reclaim(Node*)+0x144
V [libjvm.so+0x87fe24] void IdealKit::if_then(Node*,BoolTest::mask,Node*,float,float,bool)+0x35c;; void IdealKit::if_then(Node*,BoolTest::mask,Node*,float,float,bool)+0x35c
V [libjvm.so+0xcd5b40] void LibraryCallKit::insert_g1_pre_barrier(Node*,Node*,Node*)+0x218;; void LibraryCallKit::insert_g1_pre_barrier(Node*,Node*,Node*)+0x218
V [libjvm.so+0xcd6b98] bool LibraryCallKit::inline_unsafe_access(bool,bool,BasicType,bool)+0xc08;; bool LibraryCallKit::inline_unsafe_access(bool,bool,BasicType,bool)+0xc08
V [libjvm.so+0xccb3e4] JVMState*LibraryIntrinsic::generate(JVMState*)+0xec;; JVMState*LibraryIntrinsic::generate(JVMState*)+0xec
V [libjvm.so+0x74f910] void Parse::do_call()+0x5e8;; void Parse::do_call()+0x5e8
V [libjvm.so+0xf3dd14] void Parse::do_one_bytecode()+0x6194;; void Parse::do_one_bytecode()+0x6194
V [libjvm.so+0xf26174] void Parse::do_one_block()+0x484;; void Parse::do_one_block()+0x484
V [libjvm.so+0xf217fc] void Parse::do_all_blocks()+0x554;; void Parse::do_all_blocks()+0x554
V [libjvm.so+0xf211f8] Parse::Parse #Nvariant 1(JVMState*,ciMethod*,float)+0xa80;; Parse::Parse(JVMState*,ciMethod*,float)+0xa80
V [libjvm.so+0x4b59f8] JVMState*ParseGenerator::generate(JVMState*)+0xd0;; JVMState*ParseGenerator::generate(JVMState*)+0xd0
V [libjvm.so+0x6202a4] Compile::Compile(ciEnv*,C2Compiler*,ciMethod*,int,bool,bool)+0xbac;; Compile::Compile(ciEnv*,C2Compiler*,ciMethod*,int,bool,bool)+0xbac
V [libjvm.so+0x4b3bbc] void C2Compiler::compile_method(ciEnv*,ciMethod*,int)+0xb4;; void C2Compiler::compile_method(ciEnv*,ciMethod*,int)+0xb4
V [libjvm.so+0x638e50] void CompileBroker::invoke_compiler_on_method(CompileTask*)+0x16d8;; void CompileBroker::invoke_compiler_on_method(CompileTask*)+0x16d8
V [libjvm.so+0x637264] void CompileBroker::compiler_thread_loop()+0x6e4;; void CompileBroker::compiler_thread_loop()+0x6e4
V [libjvm.so+0x116f43c] void JavaThread::thread_main_inner()+0x1a4;; void JavaThread::thread_main_inner()+0x1a4
V [libjvm.so+0x116f278] void JavaThread::run()+0x248;; void JavaThread::run()+0x248
V [libjvm.so+0xed9cb0] java_start+0x270;; java_start+0x270


Current CompileTask:
C2: 9572 17 sun.misc.Unsafe.getObject(Ljava/lang/Object;I)Ljava/lang/Object; (8 bytes)

This is definitely in code that was added for 7009266. The code is generating guards around a G1 barrier.