Merge "JDWP: fix setting multiple breakpoints in the same method" into lmp-mr1-dev
diff --git a/runtime/debugger.cc b/runtime/debugger.cc
index 3f6bf79..c2745ff 100644
--- a/runtime/debugger.cc
+++ b/runtime/debugger.cc
@@ -3200,8 +3200,12 @@
}
}
+// Returns the deoptimization kind required to set a breakpoint in a method.
+// If a breakpoint has already been set, we also return the first breakpoint
+// through the given 'existing_brkpt' pointer.
static DeoptimizationRequest::Kind GetRequiredDeoptimizationKind(Thread* self,
- mirror::ArtMethod* m)
+ mirror::ArtMethod* m,
+ const Breakpoint** existing_brkpt)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (!Dbg::RequiresDeoptimization()) {
// We already run in interpreter-only mode so we don't need to deoptimize anything.
@@ -3209,12 +3213,14 @@
<< PrettyMethod(m);
return DeoptimizationRequest::kNothing;
}
- const Breakpoint* existing_breakpoint;
+ const Breakpoint* first_breakpoint;
{
ReaderMutexLock mu(self, *Locks::breakpoint_lock_);
- existing_breakpoint = FindFirstBreakpointForMethod(m);
+ first_breakpoint = FindFirstBreakpointForMethod(m);
+ *existing_brkpt = first_breakpoint;
}
- if (existing_breakpoint == nullptr) {
+
+ if (first_breakpoint == nullptr) {
// There is no breakpoint on this method yet: we need to deoptimize. If this method may be
// inlined, we deoptimize everything; otherwise we deoptimize only this method.
// Note: IsMethodPossiblyInlined goes into the method verifier and may cause thread suspension.
@@ -3241,7 +3247,7 @@
// There is at least one breakpoint for this method: we don't need to deoptimize.
// Let's check that all breakpoints are configured the same way for deoptimization.
VLOG(jdwp) << "Breakpoint already set: no deoptimization is required";
- DeoptimizationRequest::Kind deoptimization_kind = existing_breakpoint->GetDeoptimizationKind();
+ DeoptimizationRequest::Kind deoptimization_kind = first_breakpoint->GetDeoptimizationKind();
if (kIsDebugBuild) {
ReaderMutexLock mu(self, *Locks::breakpoint_lock_);
SanityCheckExistingBreakpoints(m, deoptimization_kind);
@@ -3257,7 +3263,9 @@
mirror::ArtMethod* m = FromMethodId(location->method_id);
DCHECK(m != nullptr) << "No method for method id " << location->method_id;
- const DeoptimizationRequest::Kind deoptimization_kind = GetRequiredDeoptimizationKind(self, m);
+ const Breakpoint* existing_breakpoint = nullptr;
+ const DeoptimizationRequest::Kind deoptimization_kind =
+ GetRequiredDeoptimizationKind(self, m, &existing_breakpoint);
req->SetKind(deoptimization_kind);
if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) {
req->SetMethod(m);
@@ -3269,7 +3277,15 @@
{
WriterMutexLock mu(self, *Locks::breakpoint_lock_);
- gBreakpoints.push_back(Breakpoint(m, location->dex_pc, deoptimization_kind));
+ // If there is at least one existing breakpoint on the same method, the new breakpoint
+ // must have the same deoptimization kind than the existing breakpoint(s).
+ DeoptimizationRequest::Kind breakpoint_deoptimization_kind;
+ if (existing_breakpoint != nullptr) {
+ breakpoint_deoptimization_kind = existing_breakpoint->GetDeoptimizationKind();
+ } else {
+ breakpoint_deoptimization_kind = deoptimization_kind;
+ }
+ gBreakpoints.push_back(Breakpoint(m, location->dex_pc, breakpoint_deoptimization_kind));
VLOG(jdwp) << "Set breakpoint #" << (gBreakpoints.size() - 1) << ": "
<< gBreakpoints[gBreakpoints.size() - 1];
}
