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8016277: Crash in nmethod::is_compiled_by_c1() on x86

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Method pointer for zombie methods may be invalid

Reviewed-by: kvn, coleenp
This commit is contained in:
Roland Westrelin 2013-08-26 16:12:20 +02:00
parent f188c2bf70
commit 515a7df996
1 changed files with 12 additions and 6 deletions
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18
hotspot/src/share/vm/code/nmethod.cpp
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@ -93,18 +93,21 @@ HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload,
#endif
bool nmethod::is_compiled_by_c1() const {
if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing
if (is_native_method()) return false;
if (compiler() == NULL) {
return false;
}
return compiler()->is_c1();
}
bool nmethod::is_compiled_by_c2() const {
if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing
if (is_native_method()) return false;
if (compiler() == NULL) {
return false;
}
return compiler()->is_c2();
}
bool nmethod::is_compiled_by_shark() const {
if (is_native_method()) return false;
assert(compiler() != NULL, "must be");
if (compiler() == NULL) {
return false;
}
return compiler()->is_shark();
}
@ -1401,6 +1404,9 @@ bool nmethod::make_not_entrant_or_zombie(unsigned int state) {
// nmethods aren't scanned for GC.
_oops_are_stale = true;
#endif
// the Method may be reclaimed by class unloading now that the
// nmethod is in zombie state
set_method(NULL);
} else {
assert(state == not_entrant, "other cases may need to be handled differently");
}