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8209950: SIGBUS in CodeHeapState::print_names()

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Reviewed-by: thartmann, kvn
This commit is contained in:
Lutz Schmidt 2018-08-30 09:34:10 +02:00
parent 05b8f66dff
commit af1ce0a659
4 changed files with 25 additions and 11 deletions
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14
src/hotspot/share/runtime/sharedRuntime.cpp
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@ -2135,16 +2135,14 @@ class MethodArityHistogram {
static int _max_size; // max. arg size seen
static void add_method_to_histogram(nmethod* nm) {
// These checks are taken from CodeHeapState::print_names()
Method* m = (nm == NULL) ? NULL : nm->method(); // nm->method() may be uninitialized, i.e. != NULL, but invalid
if ((nm != NULL) && (m != NULL) && !nm->is_zombie() && !nm->is_not_installed() &&
os::is_readable_pointer(m) && os::is_readable_pointer(m->constants())) {
ArgumentCount args(m->signature());
int arity = args.size() + (m->is_static() ? 0 : 1);
int argsize = m->size_of_parameters();
if (CompiledMethod::nmethod_access_is_safe(nm)) {
Method* method = nm->method();
ArgumentCount args(method->signature());
int arity = args.size() + (method->is_static() ? 0 : 1);
int argsize = method->size_of_parameters();
arity = MIN2(arity, MAX_ARITY-1);
argsize = MIN2(argsize, MAX_ARITY-1);
int count = nm->method()->compiled_invocation_count();
int count = method->compiled_invocation_count();
_arity_histogram[arity] += count;
_size_histogram[argsize] += count;
_max_arity = MAX2(_max_arity, arity);