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-rw-r--r--runtime/openjdkjvmti/OpenjdkJvmTi.cc2
-rw-r--r--runtime/openjdkjvmti/ti_redefine.cc68
-rw-r--r--runtime/openjdkjvmti/ti_redefine.h6
-rw-r--r--test/912-classes/classes.cc14
-rw-r--r--test/912-classes/expected.txt14
-rw-r--r--test/912-classes/src/Main.java5
6 files changed, 80 insertions, 29 deletions
diff --git a/runtime/openjdkjvmti/OpenjdkJvmTi.cc b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
index d364d6e0ad..c472b54b5b 100644
--- a/runtime/openjdkjvmti/OpenjdkJvmTi.cc
+++ b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
@@ -599,7 +599,7 @@ class JvmtiFunctions {
static jvmtiError IsModifiableClass(jvmtiEnv* env,
jclass klass,
jboolean* is_modifiable_class_ptr) {
- return ERR(NOT_IMPLEMENTED);
+ return Redefiner::IsModifiableClass(env, klass, is_modifiable_class_ptr);
}
static jvmtiError GetClassLoader(jvmtiEnv* env, jclass klass, jobject* classloader_ptr) {
diff --git a/runtime/openjdkjvmti/ti_redefine.cc b/runtime/openjdkjvmti/ti_redefine.cc
index 6b0e9c8488..adec6c94bc 100644
--- a/runtime/openjdkjvmti/ti_redefine.cc
+++ b/runtime/openjdkjvmti/ti_redefine.cc
@@ -195,6 +195,45 @@ class ObsoleteMethodStackVisitor : public art::StackVisitor {
std::string* error_msg_;
};
+jvmtiError Redefiner::IsModifiableClass(jvmtiEnv* env ATTRIBUTE_UNUSED,
+ jclass klass,
+ jboolean* is_redefinable) {
+ // TODO Check for the appropriate feature flags once we have enabled them.
+ art::Thread* self = art::Thread::Current();
+ art::ScopedObjectAccess soa(self);
+ art::StackHandleScope<1> hs(self);
+ art::ObjPtr<art::mirror::Object> obj(self->DecodeJObject(klass));
+ if (obj.IsNull()) {
+ return ERR(INVALID_CLASS);
+ }
+ art::Handle<art::mirror::Class> h_klass(hs.NewHandle(obj->AsClass()));
+ std::string err_unused;
+ *is_redefinable =
+ Redefiner::GetClassRedefinitionError(h_klass, &err_unused) == OK ? JNI_TRUE : JNI_FALSE;
+ return OK;
+}
+
+jvmtiError Redefiner::GetClassRedefinitionError(art::Handle<art::mirror::Class> klass,
+ /*out*/std::string* error_msg) {
+ if (klass->IsPrimitive()) {
+ *error_msg = "Modification of primitive classes is not supported";
+ return ERR(UNMODIFIABLE_CLASS);
+ } else if (klass->IsInterface()) {
+ *error_msg = "Modification of Interface classes is currently not supported";
+ return ERR(UNMODIFIABLE_CLASS);
+ } else if (klass->IsArrayClass()) {
+ *error_msg = "Modification of Array classes is not supported";
+ return ERR(UNMODIFIABLE_CLASS);
+ } else if (klass->IsProxyClass()) {
+ *error_msg = "Modification of proxy classes is not supported";
+ return ERR(UNMODIFIABLE_CLASS);
+ }
+
+ // TODO We should check if the class has non-obsoletable methods on the stack
+ LOG(WARNING) << "presence of non-obsoletable methods on stacks is not currently checked";
+ return OK;
+}
+
// Moves dex data to an anonymous, read-only mmap'd region.
std::unique_ptr<art::MemMap> Redefiner::MoveDataToMemMap(const std::string& original_location,
jint data_len,
@@ -625,28 +664,17 @@ bool Redefiner::CheckClass() {
// TODO Move this to use IsRedefinable when that function is made.
bool Redefiner::CheckRedefinable() {
- art::ObjPtr<art::mirror::Class> klass(GetMirrorClass());
- if (klass->IsPrimitive()) {
- RecordFailure(ERR(UNMODIFIABLE_CLASS),
- "Modification of primitive classes is not supported");
- return false;
- } else if (klass->IsInterface()) {
- RecordFailure(ERR(UNMODIFIABLE_CLASS),
- "Modification of Interface classes is currently not supported");
- return false;
- } else if (klass->IsArrayClass()) {
- RecordFailure(ERR(UNMODIFIABLE_CLASS),
- "Modification of Array classes is not supported");
- return false;
- } else if (klass->IsProxyClass()) {
- RecordFailure(ERR(UNMODIFIABLE_CLASS),
- "Modification of proxy classes is not supported");
+ std::string err;
+ art::StackHandleScope<1> hs(self_);
+
+ art::Handle<art::mirror::Class> h_klass(hs.NewHandle(GetMirrorClass()));
+ jvmtiError res = Redefiner::GetClassRedefinitionError(h_klass, &err);
+ if (res != OK) {
+ RecordFailure(res, err);
return false;
+ } else {
+ return true;
}
-
- // TODO We should check if the class has non-obsoletable methods on the stack
- LOG(WARNING) << "presence of non-obsoletable methods on stacks is not currently checked";
- return true;
}
bool Redefiner::CheckRedefinitionIsValid() {
diff --git a/runtime/openjdkjvmti/ti_redefine.h b/runtime/openjdkjvmti/ti_redefine.h
index d6bccb4238..01b5eca330 100644
--- a/runtime/openjdkjvmti/ti_redefine.h
+++ b/runtime/openjdkjvmti/ti_redefine.h
@@ -80,6 +80,8 @@ class Redefiner {
unsigned char* dex_data,
std::string* error_msg);
+ static jvmtiError IsModifiableClass(jvmtiEnv* env, jclass klass, jboolean* is_redefinable);
+
private:
jvmtiError result_;
art::Runtime* runtime_;
@@ -106,6 +108,10 @@ class Redefiner {
error_msg_(error_msg),
class_sig_(class_sig) { }
+ static jvmtiError GetClassRedefinitionError(art::Handle<art::mirror::Class> klass,
+ /*out*/std::string* error_msg)
+ REQUIRES_SHARED(art::Locks::mutator_lock_);
+
static std::unique_ptr<art::MemMap> MoveDataToMemMap(const std::string& original_location,
jint data_len,
unsigned char* dex_data,
diff --git a/test/912-classes/classes.cc b/test/912-classes/classes.cc
index 19d82c544c..38a4f0e337 100644
--- a/test/912-classes/classes.cc
+++ b/test/912-classes/classes.cc
@@ -29,6 +29,20 @@
namespace art {
namespace Test912Classes {
+extern "C" JNIEXPORT jboolean JNICALL Java_Main_isModifiableClass(
+ JNIEnv* env ATTRIBUTE_UNUSED, jclass Main_klass ATTRIBUTE_UNUSED, jclass klass) {
+ jboolean res = JNI_FALSE;
+ jvmtiError result = jvmti_env->IsModifiableClass(klass, &res);
+ if (result != JVMTI_ERROR_NONE) {
+ char* err;
+ jvmti_env->GetErrorName(result, &err);
+ printf("Failure running IsModifiableClass: %s\n", err);
+ jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
+ return JNI_FALSE;
+ }
+ return res;
+}
+
extern "C" JNIEXPORT jobjectArray JNICALL Java_Main_getClassSignature(
JNIEnv* env, jclass Main_klass ATTRIBUTE_UNUSED, jclass klass) {
char* sig;
diff --git a/test/912-classes/expected.txt b/test/912-classes/expected.txt
index 3507a1a676..44c861a3b7 100644
--- a/test/912-classes/expected.txt
+++ b/test/912-classes/expected.txt
@@ -12,13 +12,13 @@
411
[[D, null]
411
-int interface=false array=false
-$Proxy0 interface=false array=false
-java.lang.Runnable interface=true array=false
-java.lang.String interface=false array=false
-[I interface=false array=true
-[Ljava.lang.Runnable; interface=false array=true
-[Ljava.lang.String; interface=false array=true
+int interface=false array=false modifiable=false
+$Proxy0 interface=false array=false modifiable=false
+java.lang.Runnable interface=true array=false modifiable=false
+java.lang.String interface=false array=false modifiable=true
+[I interface=false array=true modifiable=false
+[Ljava.lang.Runnable; interface=false array=true modifiable=false
+[Ljava.lang.String; interface=false array=true modifiable=false
[public static final int java.lang.Integer.BYTES, static final char[] java.lang.Integer.DigitOnes, static final char[] java.lang.Integer.DigitTens, public static final int java.lang.Integer.MAX_VALUE, public static final int java.lang.Integer.MIN_VALUE, public static final int java.lang.Integer.SIZE, private static final java.lang.String[] java.lang.Integer.SMALL_NEG_VALUES, private static final java.lang.String[] java.lang.Integer.SMALL_NONNEG_VALUES, public static final java.lang.Class java.lang.Integer.TYPE, static final char[] java.lang.Integer.digits, private static final long java.lang.Integer.serialVersionUID, static final int[] java.lang.Integer.sizeTable, private final int java.lang.Integer.value]
[]
[]
diff --git a/test/912-classes/src/Main.java b/test/912-classes/src/Main.java
index 69e5a4cc58..e627d4227a 100644
--- a/test/912-classes/src/Main.java
+++ b/test/912-classes/src/Main.java
@@ -107,7 +107,9 @@ public class Main {
private static void testClassType(Class<?> c) throws Exception {
boolean isInterface = isInterface(c);
boolean isArray = isArrayClass(c);
- System.out.println(c.getName() + " interface=" + isInterface + " array=" + isArray);
+ boolean isModifiable = isModifiableClass(c);
+ System.out.println(c.getName() + " interface=" + isInterface + " array=" + isArray +
+ " modifiable=" + isModifiable);
}
private static void testClassFields(Class<?> c) throws Exception {
@@ -149,6 +151,7 @@ public class Main {
}
}
+ private static native boolean isModifiableClass(Class<?> c);
private static native String[] getClassSignature(Class<?> c);
private static native boolean isInterface(Class<?> c);
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-15 23:49:30 +0000