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7166498: JVM crash in ClassVerifier

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Fixed raw pointer being used after potential safepoint/GC

Reviewed-by: acorn, fparain, dholmes
This commit is contained in:
Keith McGuigan 2012-06-04 10:22:37 -04:00
parent e3d25bce34
commit 1ac7879229
1 changed files with 4 additions and 0 deletions
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4
hotspot/src/share/vm/classfile/verifier.cpp
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@ -1738,10 +1738,14 @@ void ClassVerifier::verify_switch(
int target = bci + default_offset;
stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this));
for (int i = 0; i < keys; i++) {
// Because check_jump_target() may safepoint, the bytecode could have
// moved, which means 'aligned_bcp' is no good and needs to be recalculated.
aligned_bcp = (address)round_to((intptr_t)(bcs->bcp() + 1), jintSize);
target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize);
stackmap_table->check_jump_target(
current_frame, target, CHECK_VERIFY(this));
}
NOT_PRODUCT(aligned_bcp = NULL); // no longer valid at this point
}
bool ClassVerifier::name_in_supers(