[lldb/API] Add Breakpoint::SerializeToStructuredData to SBAPI

This patch adds a way to fetch breakpoint metadatas as a serialized
`Structured` Data format (JSON). This can be used by IDEs to update
their UI when a breakpoint is set or modified from the console.

rdar://11013798

Differential Revision: https://reviews.llvm.org/D87491

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>

lldb/bindings/interface/SBBreakpoint.i

@@ -234,6 +234,8 @@ public:
     SBError
     AddLocation(SBAddress &address);
 
+    SBStructuredData SBBreakpoint::SerializeToStructuredData();
+
     static bool
     EventIsBreakpointEvent (const lldb::SBEvent &event);
 

lldb/include/lldb/API/SBBreakpoint.h

@@ -141,6 +141,8 @@ public:
   SBError
   AddLocation(SBAddress &address);
 
+  SBStructuredData SerializeToStructuredData();
+
 private:
   friend class SBBreakpointList;
   friend class SBBreakpointLocation;

lldb/source/API/SBBreakpoint.cpp

@@ -575,7 +575,22 @@ SBError SBBreakpoint::AddLocation(SBAddress &address) {
   return LLDB_RECORD_RESULT(error);
 }
 
-void SBBreakpoint ::SetCallback(SBBreakpointHitCallback callback, void *baton) {
+SBStructuredData SBBreakpoint::SerializeToStructuredData() {
+  LLDB_RECORD_METHOD_NO_ARGS(lldb::SBStructuredData, SBBreakpoint,
+                             SerializeToStructuredData);
+
+  SBStructuredData data;
+  BreakpointSP bkpt_sp = GetSP();
+
+  if (!bkpt_sp)
+    return LLDB_RECORD_RESULT(data);
+
+  StructuredData::ObjectSP bkpt_dict = bkpt_sp->SerializeToStructuredData();
+  data.m_impl_up->SetObjectSP(bkpt_dict);
+  return LLDB_RECORD_RESULT(data);
+}
+
+void SBBreakpoint::SetCallback(SBBreakpointHitCallback callback, void *baton) {
   LLDB_RECORD_DUMMY(void, SBBreakpoint, SetCallback,
                     (lldb::SBBreakpointHitCallback, void *), callback, baton);
 
@@ -1017,6 +1032,8 @@ void RegisterMethods<SBBreakpoint>(Registry &R) {
                        (lldb::SBStream &, bool));
   LLDB_REGISTER_METHOD(lldb::SBError, SBBreakpoint, AddLocation,
                        (lldb::SBAddress &));
+  LLDB_REGISTER_METHOD(lldb::SBStructuredData, SBBreakpoint,
+                       SerializeToStructuredData, ());
   LLDB_REGISTER_METHOD(void, SBBreakpoint, SetScriptCallbackFunction,
                        (const char *));
   LLDB_REGISTER_METHOD(lldb::SBError, SBBreakpoint, SetScriptCallbackFunction,

lldb/test/API/functionalities/breakpoint/serialize/TestBreakpointSerialization.py

@@ -3,6 +3,7 @@ Test breakpoint serialization.
 """
 
 import os
+import json
 import lldb
 from lldbsuite.test.decorators import *
 from lldbsuite.test.lldbtest import *
@@ -56,6 +57,41 @@ class BreakpointSerialization(TestBase):
         self.setup_targets_and_cleanup()
         self.do_check_extra_args()
 
+    def test_structured_data_serialization(self):
+        target = self.dbg.GetDummyTarget()
+        self.assertTrue(target.IsValid(), VALID_TARGET)
+
+        interpreter = self.dbg.GetCommandInterpreter()
+        result = lldb.SBCommandReturnObject()
+        interpreter.HandleCommand("br set -f foo -l 42", result)
+        result = lldb.SBCommandReturnObject()
+        interpreter.HandleCommand("br set -c 'argc == 1' -n main", result)
+
+        bkp1 =  target.GetBreakpointAtIndex(0)
+        self.assertTrue(bkp1.IsValid(), VALID_BREAKPOINT)
+        stream = lldb.SBStream()
+        sd = bkp1.SerializeToStructuredData()
+        sd.GetAsJSON(stream)
+        serialized_data = json.loads(stream.GetData())
+        self.assertEqual(serialized_data["Breakpoint"]["BKPTResolver"]["Options"]["FileName"], "foo")
+        self.assertEqual(serialized_data["Breakpoint"]["BKPTResolver"]["Options"]["LineNumber"], 42)
+
+        bkp2 =  target.GetBreakpointAtIndex(1)
+        self.assertTrue(bkp2.IsValid(), VALID_BREAKPOINT)
+        stream = lldb.SBStream()
+        sd = bkp2.SerializeToStructuredData()
+        sd.GetAsJSON(stream)
+        serialized_data = json.loads(stream.GetData())
+        self.assertIn("main", serialized_data["Breakpoint"]["BKPTResolver"]["Options"]["SymbolNames"])
+        self.assertEqual(serialized_data["Breakpoint"]["BKPTOptions"]["ConditionText"],"argc == 1")
+
+        invalid_bkp = lldb.SBBreakpoint()
+        self.assertFalse(invalid_bkp.IsValid(), "Breakpoint should not be valid.")
+        stream = lldb.SBStream()
+        sd = invalid_bkp.SerializeToStructuredData()
+        sd.GetAsJSON(stream)
+        self.assertFalse(stream.GetData(), "Invalid breakpoint should have an empty structured data")
+
     def setup_targets_and_cleanup(self):
         def cleanup ():
             self.RemoveTempFile(self.bkpts_file_path)