Basic obsolete methods support
Add support for executing obsolete methods following redefinitions.
This support includes methods that have been jitted. This does not add
any additional validity checks to our redefinition functions.
Note using work-arounds to ensure 916 works pending some fixes to the
compiler, deoptimizer, or both.
Test: ./test/run-test --host 914
Test: ./test/run-test --host 915
Test: ./test/run-test --host 916
Test: mma -j40 test-art-host
Test: ART_TEST_JIT=true \
ART_TEST_INTERPRETER=true mma -j40 test-art-host
Test: ./art/tools/run-jdwp-tests.sh --mode=host --variant=X64
Test: ./art/tools/run-jdwp-tests.sh --mode=host --variant=X64 --no-jit
Bug: 32369913
Bug: 33630159
Change-Id: I78ef95f484146f1fb93c37fc50f56575bdab2432
diff --git a/runtime/instrumentation.cc b/runtime/instrumentation.cc
index 870d1ae..3956af4 100644
--- a/runtime/instrumentation.cc
+++ b/runtime/instrumentation.cc
@@ -557,8 +557,10 @@
}
Instrumentation::InstrumentationLevel Instrumentation::GetCurrentInstrumentationLevel() const {
- if (interpreter_stubs_installed_) {
+ if (interpreter_stubs_installed_ && interpret_only_) {
return InstrumentationLevel::kInstrumentWithInterpreter;
+ } else if (interpreter_stubs_installed_) {
+ return InstrumentationLevel::kInstrumentWithInterpreterAndJit;
} else if (entry_exit_stubs_installed_) {
return InstrumentationLevel::kInstrumentWithInstrumentationStubs;
} else {
@@ -566,6 +568,14 @@
}
}
+bool Instrumentation::RequiresInstrumentationInstallation(InstrumentationLevel new_level) const {
+ // We need to reinstall instrumentation if we go to a different level or if the current level is
+ // kInstrumentWithInterpreterAndJit since that level does not force all code to always use the
+ // interpreter and so we might have started running optimized code again.
+ return new_level == InstrumentationLevel::kInstrumentWithInterpreterAndJit ||
+ GetCurrentInstrumentationLevel() != new_level;
+}
+
void Instrumentation::ConfigureStubs(const char* key, InstrumentationLevel desired_level) {
// Store the instrumentation level for this key or remove it.
if (desired_level == InstrumentationLevel::kInstrumentNothing) {
@@ -585,8 +595,7 @@
interpret_only_ = (requested_level == InstrumentationLevel::kInstrumentWithInterpreter) ||
forced_interpret_only_;
- InstrumentationLevel current_level = GetCurrentInstrumentationLevel();
- if (requested_level == current_level) {
+ if (!RequiresInstrumentationInstallation(requested_level)) {
// We're already set.
return;
}
@@ -595,7 +604,7 @@
Locks::mutator_lock_->AssertExclusiveHeld(self);
Locks::thread_list_lock_->AssertNotHeld(self);
if (requested_level > InstrumentationLevel::kInstrumentNothing) {
- if (requested_level == InstrumentationLevel::kInstrumentWithInterpreter) {
+ if (requested_level >= InstrumentationLevel::kInstrumentWithInterpreterAndJit) {
interpreter_stubs_installed_ = true;
entry_exit_stubs_installed_ = true;
} else {
@@ -842,7 +851,8 @@
void Instrumentation::DisableDeoptimization(const char* key) {
CHECK_EQ(deoptimization_enabled_, true);
// If we deoptimized everything, undo it.
- if (interpreter_stubs_installed_) {
+ InstrumentationLevel level = GetCurrentInstrumentationLevel();
+ if (level == InstrumentationLevel::kInstrumentWithInterpreter) {
UndeoptimizeEverything(key);
}
// Undeoptimized selected methods.
@@ -869,6 +879,14 @@
return !deoptimization_enabled_ && !interpreter_stubs_installed_;
}
+// TODO we don't check deoptimization_enabled_ because currently there isn't really any support for
+// multiple users of instrumentation. Since this is just a temporary state anyway pending work to
+// ensure that the current_method doesn't get kept across suspend points this should be okay.
+// TODO Remove once b/33630159 is resolved.
+void Instrumentation::ReJitEverything(const char* key) {
+ ConfigureStubs(key, InstrumentationLevel::kInstrumentWithInterpreterAndJit);
+}
+
void Instrumentation::DeoptimizeEverything(const char* key) {
CHECK(deoptimization_enabled_);
ConfigureStubs(key, InstrumentationLevel::kInstrumentWithInterpreter);