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8159511: Stack map validation

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Reviewed-by: acorn, mschoene
This commit is contained in:
Harold Seigel 2016-06-30 08:11:30 -04:00 • committed by Harold Seigel
parent c6d2422f35
commit 5f49daa2c4
2 changed files with 49 additions and 1 deletions
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11
hotspot/src/share/vm/classfile/verifier.cpp
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@ -541,8 +541,19 @@ void ErrorContext::stackmap_details(outputStream* ss, const Method* method) cons
stack_map_frame* sm_frame = sm_table->entries();
streamIndentor si2(ss);
int current_offset = -1;
// Subtract two from StackMapAttribute length because the length includes
// two bytes for number of table entries.
size_t sm_table_space = method->stackmap_data()->length() - 2;
for (u2 i = 0; i < sm_table->number_of_entries(); ++i) {
ss->indent();
size_t sm_frame_size = sm_frame->size();
// If the size of the next stackmap exceeds the length of the entire
// stackmap table then print a truncated message and return.
if (sm_frame_size > sm_table_space) {
sm_frame->print_truncated(ss, current_offset);
return;
}
sm_table_space -= sm_frame_size;
sm_frame->print_on(ss, current_offset);
ss->cr();
current_offset += sm_frame->offset_delta();