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8232921: assert(is_object_aligned(result)) failed: address not aligned

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Reviewed-by: coleenp, rschmelter
This commit is contained in:
Goetz Lindenmaier 2019-10-29 15:08:19 +01:00
parent f5632e62b2
commit a3ee39cb81
1 changed files with 10 additions and 4 deletions
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14
src/hotspot/share/classfile/javaClasses.cpp
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@ -1962,6 +1962,8 @@ static inline bool version_matches(Method* method, int version) {
// This class provides a simple wrapper over the internal structure of // This class provides a simple wrapper over the internal structure of
// exception backtrace to insulate users of the backtrace from needing // exception backtrace to insulate users of the backtrace from needing
// to know what it looks like. // to know what it looks like.
// The code of this class is not GC safe. Allocations can only happen
// in expand().
class BacktraceBuilder: public StackObj { class BacktraceBuilder: public StackObj {
friend class BacktraceIterator; friend class BacktraceIterator;
private: private:
@ -2110,10 +2112,14 @@ class BacktraceBuilder: public StackObj {
void set_has_hidden_top_frame(TRAPS) { void set_has_hidden_top_frame(TRAPS) {
if (_has_hidden_top_frame == NULL) { if (_has_hidden_top_frame == NULL) {
jvalue prim; // It would be nice to add java/lang/Boolean::TRUE here
prim.z = 1; // to indicate that this backtrace has a hidden top frame.
PauseNoSafepointVerifier pnsv(&_nsv); // But this code is used before TRUE is allocated.
_has_hidden_top_frame = java_lang_boxing_object::create(T_BOOLEAN, &prim, CHECK); // Therefor let's just use an arbitrary legal oop
// available right here. We only test for != null
// anyways. _methods is a short[].
assert(_methods != NULL, "we need a legal oop");
_has_hidden_top_frame = _methods;
_head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame); _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame);
} }
} }