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8025922: JNI access to Strings need to check if the value field is non-null

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Reviewed-by: dholmes, dcubed
This commit is contained in:
Staffan Larsen 2013-10-05 15:18:57 +02:00
parent 738af149a2
commit dcbbb4d37b
2 changed files with 57 additions and 41 deletions
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56
hotspot/src/share/vm/prims/jni.cpp
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@ -3210,7 +3210,11 @@ JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(
env, string);
#endif /* USDT2 */
jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string));
jsize ret = 0;
oop s = JNIHandles::resolve_non_null(string);
if (java_lang_String::value(s) != NULL) {
ret = java_lang_String::length(s);
}
#ifndef USDT2
DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret);
#else /* USDT2 */
@ -3230,20 +3234,23 @@ JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(
env, string, (uintptr_t *) isCopy);
#endif /* USDT2 */
jchar* buf = NULL;
oop s = JNIHandles::resolve_non_null(string);
int s_len = java_lang_String::length(s);
typeArrayOop s_value = java_lang_String::value(s);
int s_offset = java_lang_String::offset(s);
jchar* buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
/* JNI Specification states return NULL on OOM */
if (buf != NULL) {
if (s_len > 0) {
memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
}
buf[s_len] = 0;
//%note jni_5
if (isCopy != NULL) {
*isCopy = JNI_TRUE;
if (s_value != NULL) {
int s_len = java_lang_String::length(s);
int s_offset = java_lang_String::offset(s);
buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
/* JNI Specification states return NULL on OOM */
if (buf != NULL) {
if (s_len > 0) {
memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
}
buf[s_len] = 0;
//%note jni_5
if (isCopy != NULL) {
*isCopy = JNI_TRUE;
}
}
}
#ifndef USDT2
@ -3313,7 +3320,11 @@ JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(
env, string);
#endif /* USDT2 */
jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string));
jsize ret = 0;
oop java_string = JNIHandles::resolve_non_null(string);
if (java_lang_String::value(java_string) != NULL) {
ret = java_lang_String::utf8_length(java_string);
}
#ifndef USDT2
DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret);
#else /* USDT2 */
@ -3332,14 +3343,17 @@ JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboole
HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(
env, string, (uintptr_t *) isCopy);
#endif /* USDT2 */
char* result = NULL;
oop java_string = JNIHandles::resolve_non_null(string);
size_t length = java_lang_String::utf8_length(java_string);
/* JNI Specification states return NULL on OOM */
char* result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
if (result != NULL) {
java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
if (isCopy != NULL) {
*isCopy = JNI_TRUE;
if (java_lang_String::value(java_string) != NULL) {
size_t length = java_lang_String::utf8_length(java_string);
/* JNI Specification states return NULL on OOM */
result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
if (result != NULL) {
java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
if (isCopy != NULL) {
*isCopy = JNI_TRUE;
}
}
}
#ifndef USDT2