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6830717: replay of compilations would help with debugging

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When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.

Reviewed-by: kvn, twisti, sspitsyn
This commit is contained in:
Yumin Qi 2012-11-12 14:03:53 -08:00 • committed by Yumin Qi
parent 8735609a8c
commit f712e12f98
54 changed files with 2160 additions and 78 deletions
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16
hotspot/src/share/vm/classfile/javaClasses.cpp
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@ -348,6 +348,22 @@ unsigned int java_lang_String::to_hash(oop java_string) {
return java_lang_String::to_hash(value->char_at_addr(offset), length);
}
char* java_lang_String::as_quoted_ascii(oop java_string) {
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* base = (length == 0) ? NULL : value->char_at_addr(offset);
if (base == NULL) return NULL;
int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
char* result = NEW_RESOURCE_ARRAY(char, result_length);
UNICODE::as_quoted_ascii(base, length, result, result_length);
assert(result_length >= length + 1, "must not be shorter");
assert(result_length == (int)strlen(result) + 1, "must match");
return result;
}
unsigned int java_lang_String::hash_string(oop java_string) {
int length = java_lang_String::length(java_string);
// Zero length string doesn't hash necessarily hash to zero.