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authorAlex Light <allight@google.com>2018-10-10 15:58:14 +0000
committerAlex Light <allight@google.com>2018-10-11 16:41:54 -0700
commit0aa7a5a6a7bc350b79351f52e26c97747e927acf (patch)
treea583889668d9703d16d37586d56421bd27c62661 /runtime/quick_exception_handler.cc
parente12575640dca5118bf96245f373acda276c22178 (diff)
Revert^4 "JVMTI PopFrame support"
This reverts commit 202b617acf477e8e8e11915f467120a0bd518e74. This unreverts commit 202b617acf. This unreverts commit 88a2a9d7a1. There were several bugs with the implementation of pop-frame related to interactions between the jit, exception handling, class-loading, and deoptimization. - We were instrumenting the target thread stack in cases where it was unnecessary which caused the exception handler to incorrectly determine that a method was not deoptimizable. This caused the pop-frame to be ignored. - We were incorrectly sending ExceptionCatch events if an exception suppressed by pop-frame would have been caught in the current frame. - We were allowing pop-frame to be used on threads suspended in the ClassLoad or ClassPrepare events despite having surprising semantics in that situation (see b/117615146). Needed to modify test 1953 slightly for inclusion in CTS. I needed to make the CTS entrypoint not run the class-load tests (since the cts configuration means the classes are loaded by the verifier and not the interpreter). I updated the expected.txt and check script to reflect this. Reason for revert: Fixed issue causing Exception events to sometimes eat PopFrame and other issues. Test: ./test.py --host Test: ./art/tools/run-libjdwp-tests.sh --mode=host Bug: 73255278 Bug: 111357976 Bug: 117533193 Bug: 117615146 Change-Id: I655c4fe769938cf41d7589f931d6710cf2001506
Diffstat (limited to 'runtime/quick_exception_handler.cc')
-rw-r--r--runtime/quick_exception_handler.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/runtime/quick_exception_handler.cc b/runtime/quick_exception_handler.cc
index e882e7370a..36a6b7fc47 100644
--- a/runtime/quick_exception_handler.cc
+++ b/runtime/quick_exception_handler.cc
@@ -402,6 +402,8 @@ class DeoptimizeStackVisitor final : public StackVisitor {
bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
exception_handler_->SetHandlerFrameDepth(GetFrameDepth());
ArtMethod* method = GetMethod();
+ VLOG(deopt) << "Deoptimizing stack: depth: " << GetFrameDepth()
+ << " at method " << ArtMethod::PrettyMethod(method);
if (method == nullptr || single_frame_done_) {
FinishStackWalk();
return false; // End stack walk.