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6539281: -Xcheck:jni should validate char* argument to ReleaseStringUTFChars

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Tag allocated memory with a magic value and verify when releasing.

Reviewed-by: phh, stefank
This commit is contained in:
Staffan Larsen 2010-12-07 03:15:45 -08:00
parent dd62e29b29
commit 1765b0fbf0
4 changed files with 65 additions and 17 deletions
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8
hotspot/src/share/vm/classfile/javaClasses.cpp
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@ -313,6 +313,14 @@ char* java_lang_String::as_utf8_string(oop java_string) {
return UNICODE::as_utf8(position, length);
}
char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
typeArrayOop value = java_lang_String::value(java_string);
int offset = java_lang_String::offset(java_string);
int length = java_lang_String::length(java_string);
jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
return UNICODE::as_utf8(position, length, buf, buflen);
}
char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
typeArrayOop value = java_lang_String::value(java_string);
int offset = java_lang_String::offset(java_string);