[FuncUnwinders] Use "symbol file" unwind plans for unwinding

Summary:
Previous patch (r360409) introduced the "symbol file unwind plan"
concept, but that plan wasn't used for unwinding yet. With this patch,
we start to consider the new plan as a possible strategy for both
synchronous and asynchronous unwinding. I also add a test that asserts
that unwinding via breakpad STACK CFI info works end-to-end.

Reviewers: jasonmolenda, clayborg

Subscribers: lldb-commits, amccarth, markmentovai

Differential Revision: https://reviews.llvm.org/D61853

llvm-svn: 361618

1 files changed, 6 insertions, 1 deletions

diff --git a/lldb/source/Symbol/FuncUnwinders.cpp b/lldb/source/Symbol/FuncUnwinders.cpp
index bbdb5e1bbf7..33b2e295989 100644
--- a/lldb/source/Symbol/FuncUnwinders.cpp
+++ b/lldb/source/Symbol/FuncUnwinders.cpp
@@ -54,9 +54,12 @@ FuncUnwinders::FuncUnwinders(UnwindTable &unwind_table, AddressRange range)
 
 FuncUnwinders::~FuncUnwinders() {}
 
-UnwindPlanSP FuncUnwinders::GetUnwindPlanAtCallSite(Target &target) {
+UnwindPlanSP FuncUnwinders::GetUnwindPlanAtCallSite(Target &target,
+                                                    Thread &thread) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
+  if (UnwindPlanSP plan_sp = GetSymbolFileUnwindPlan(thread))
+    return plan_sp;
   if (UnwindPlanSP plan_sp = GetEHFrameUnwindPlan(target))
     return plan_sp;
   if (UnwindPlanSP plan_sp = GetDebugFrameUnwindPlan(target))
@@ -357,6 +360,8 @@ UnwindPlanSP FuncUnwinders::GetUnwindPlanAtNonCallSite(Target &target,
     return eh_frame_sp;
   }
 
+  if (UnwindPlanSP plan_sp = GetSymbolFileUnwindPlan(thread))
+    return plan_sp;
   if (UnwindPlanSP plan_sp = GetEHFrameAugmentedUnwindPlan(target, thread))
     return plan_sp;
   if (UnwindPlanSP plan_sp = GetDebugFrameAugmentedUnwindPlan(target, thread))