Mercurial > hg > truffle
diff src/share/vm/prims/jvm.cpp @ 7588:f9eb431c3efe
8006005: Fix constant pool index validation and alignment trap for method parameter reflection
Summary: This patch addresses an alignment trap due to the storage format of method parameters data in constMethod. It also adds code to validate constant pool indexes for method parameters data.
Reviewed-by: jrose, dholmes
Contributed-by: eric.mccorkle@oracle.com
author | coleenp |
---|---|
date | Mon, 14 Jan 2013 11:01:39 -0500 |
parents | ade95d680b42 |
children | f422634e5828 b14da2e6f2dc |
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--- a/src/share/vm/prims/jvm.cpp Fri Jan 11 09:53:24 2013 -0800 +++ b/src/share/vm/prims/jvm.cpp Mon Jan 14 11:01:39 2013 -0500 @@ -1589,6 +1589,12 @@ return NULL; JVM_END +static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { + if (!cp->is_within_bounds(index)) { + THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); + } +} + JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) { JVMWrapper("JVM_GetMethodParameters"); @@ -1598,15 +1604,31 @@ Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); const int num_params = mh->method_parameters_length(); - if(0 != num_params) { + if (0 != num_params) { + // make sure all the symbols are properly formatted + for (int i = 0; i < num_params; i++) { + MethodParametersElement* params = mh->method_parameters_start(); + int index = params[i].name_cp_index; + bounds_check(mh->constants(), index, CHECK_NULL); + + if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { + THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), + "Wrong type at constant pool index"); + } + + } + objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); objArrayHandle result (THREAD, result_oop); - for(int i = 0; i < num_params; i++) { + for (int i = 0; i < num_params; i++) { MethodParametersElement* params = mh->method_parameters_start(); - Symbol* const sym = mh->constants()->symbol_at(params[i].name_cp_index); + // For a 0 index, give a NULL symbol + Symbol* const sym = 0 != params[i].name_cp_index ? + mh->constants()->symbol_at(params[i].name_cp_index) : NULL; + int flags = build_int_from_shorts(params[i].flags_lo, params[i].flags_hi); oop param = Reflection::new_parameter(reflected_method, i, sym, - params[i].flags, CHECK_NULL); + flags, CHECK_NULL); result->obj_at_put(i, param); } return (jobjectArray)JNIHandles::make_local(env, result()); @@ -1830,13 +1852,6 @@ JVM_END -static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { - if (!cp->is_within_bounds(index)) { - THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); - } -} - - JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) { JVMWrapper("JVM_ConstantPoolGetClassAt"); @@ -1851,7 +1866,6 @@ } JVM_END - JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) { JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");