[Lldb-commits] [lldb] Reapply PR/87550 (PR #94625)

Vy Nguyen via lldb-commits lldb-commits at lists.llvm.org
Fri Jun 7 08:24:51 PDT 2024


https://github.com/oontvoo updated https://github.com/llvm/llvm-project/pull/94625

>From bbaa8ef4434a1d97a31a5dd7cbfc3cdfebcbe41d Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng at google.com>
Date: Thu, 6 Jun 2024 10:17:06 -0400
Subject: [PATCH 1/6] Reapply "[lldb][lldb-dap] Cleanup breakpoint filters."
 (#93739)

This reverts commit 6595e7fa1b5588f860aa057aac47c43623169584.
---
 lldb/include/lldb/API/SBDebugger.h    |  2 ++
 lldb/include/lldb/Symbol/TypeSystem.h |  1 +
 lldb/source/API/SBDebugger.cpp        |  4 +++
 lldb/source/Symbol/TypeSystem.cpp     | 11 ++++++++
 lldb/tools/lldb-dap/DAP.cpp           | 39 ++++++++++++++++++++-------
 lldb/tools/lldb-dap/DAP.h             |  4 ++-
 lldb/tools/lldb-dap/lldb-dap.cpp      |  6 +++--
 7 files changed, 54 insertions(+), 13 deletions(-)

diff --git a/lldb/include/lldb/API/SBDebugger.h b/lldb/include/lldb/API/SBDebugger.h
index af19b1faf3bf5..84ea9c0f772e1 100644
--- a/lldb/include/lldb/API/SBDebugger.h
+++ b/lldb/include/lldb/API/SBDebugger.h
@@ -57,6 +57,8 @@ class LLDB_API SBDebugger {
 
   static const char *GetBroadcasterClass();
 
+  static bool SupportsLanguage(lldb::LanguageType language);
+
   lldb::SBBroadcaster GetBroadcaster();
 
   /// Get progress data from a SBEvent whose type is eBroadcastBitProgress.
diff --git a/lldb/include/lldb/Symbol/TypeSystem.h b/lldb/include/lldb/Symbol/TypeSystem.h
index b4025c173a186..7d48f9b316138 100644
--- a/lldb/include/lldb/Symbol/TypeSystem.h
+++ b/lldb/include/lldb/Symbol/TypeSystem.h
@@ -209,6 +209,7 @@ class TypeSystem : public PluginInterface,
   // TypeSystems can support more than one language
   virtual bool SupportsLanguage(lldb::LanguageType language) = 0;
 
+  static bool SupportsLanguageStatic(lldb::LanguageType language);
   // Type Completion
 
   virtual bool GetCompleteType(lldb::opaque_compiler_type_t type) = 0;
diff --git a/lldb/source/API/SBDebugger.cpp b/lldb/source/API/SBDebugger.cpp
index 7ef0d6efd4aaa..29da7d33dd80b 100644
--- a/lldb/source/API/SBDebugger.cpp
+++ b/lldb/source/API/SBDebugger.cpp
@@ -1742,3 +1742,7 @@ bool SBDebugger::InterruptRequested()   {
     return m_opaque_sp->InterruptRequested();
   return false;
 }
+
+bool SBDebugger::SupportsLanguage(lldb::LanguageType language) {
+  return TypeSystem::SupportsLanguageStatic(language);
+}
diff --git a/lldb/source/Symbol/TypeSystem.cpp b/lldb/source/Symbol/TypeSystem.cpp
index 4956f10a0b0a7..5d56d9b1829da 100644
--- a/lldb/source/Symbol/TypeSystem.cpp
+++ b/lldb/source/Symbol/TypeSystem.cpp
@@ -335,3 +335,14 @@ TypeSystemMap::GetTypeSystemForLanguage(lldb::LanguageType language,
   }
   return GetTypeSystemForLanguage(language);
 }
+
+bool TypeSystem::SupportsLanguageStatic(lldb::LanguageType language) {
+  if (language == eLanguageTypeUnknown)
+    return false;
+
+  LanguageSet languages =
+      PluginManager::GetAllTypeSystemSupportedLanguagesForTypes();
+  if (languages.Empty())
+    return false;
+  return languages[language];
+}
diff --git a/lldb/tools/lldb-dap/DAP.cpp b/lldb/tools/lldb-dap/DAP.cpp
index d419f821999e6..807d27c2c869d 100644
--- a/lldb/tools/lldb-dap/DAP.cpp
+++ b/lldb/tools/lldb-dap/DAP.cpp
@@ -32,14 +32,7 @@ namespace lldb_dap {
 DAP g_dap;
 
 DAP::DAP()
-    : broadcaster("lldb-dap"),
-      exception_breakpoints(
-          {{"cpp_catch", "C++ Catch", lldb::eLanguageTypeC_plus_plus},
-           {"cpp_throw", "C++ Throw", lldb::eLanguageTypeC_plus_plus},
-           {"objc_catch", "Objective-C Catch", lldb::eLanguageTypeObjC},
-           {"objc_throw", "Objective-C Throw", lldb::eLanguageTypeObjC},
-           {"swift_catch", "Swift Catch", lldb::eLanguageTypeSwift},
-           {"swift_throw", "Swift Throw", lldb::eLanguageTypeSwift}}),
+    : broadcaster("lldb-dap"), exception_breakpoints(),
       focus_tid(LLDB_INVALID_THREAD_ID), stop_at_entry(false), is_attach(false),
       enable_auto_variable_summaries(false),
       enable_synthetic_child_debugging(false),
@@ -65,8 +58,32 @@ DAP::DAP()
 
 DAP::~DAP() = default;
 
+void DAP::PopulateExceptionBreakpoints() {
+  exception_breakpoints = {};
+  if (debugger.SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
+    exception_breakpoints->emplace_back("cpp_catch", "C++ Catch",
+                                        lldb::eLanguageTypeC_plus_plus);
+    exception_breakpoints->emplace_back("cpp_throw", "C++ Throw",
+                                        lldb::eLanguageTypeC_plus_plus);
+  }
+  if (debugger.SupportsLanguage(lldb::eLanguageTypeObjC)) {
+    exception_breakpoints->emplace_back("objc_catch", "Objective-C Catch",
+                                        lldb::eLanguageTypeObjC);
+    exception_breakpoints->emplace_back("objc_throw", "Objective-C Throw",
+                                        lldb::eLanguageTypeObjC);
+  }
+  if (debugger.SupportsLanguage(lldb::eLanguageTypeSwift)) {
+    exception_breakpoints->emplace_back("swift_catch", "Swift Catch",
+                                        lldb::eLanguageTypeSwift);
+    exception_breakpoints->emplace_back("swift_throw", "Swift Throw",
+                                        lldb::eLanguageTypeSwift);
+  }
+}
+
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
-  for (auto &bp : exception_breakpoints) {
+  assert(exception_breakpoints.has_value() &&
+         "PopulateExceptionBreakpoints must be called first");
+  for (auto &bp : *exception_breakpoints) {
     if (bp.filter == filter)
       return &bp;
   }
@@ -74,7 +91,9 @@ ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
 }
 
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const lldb::break_id_t bp_id) {
-  for (auto &bp : exception_breakpoints) {
+  assert(exception_breakpoints.has_value() &&
+         "PopulateExceptionBreakpoints must be called first");
+  for (auto &bp : *exception_breakpoints) {
     if (bp.bp.GetID() == bp_id)
       return &bp;
   }
diff --git a/lldb/tools/lldb-dap/DAP.h b/lldb/tools/lldb-dap/DAP.h
index a88ee3e1dec6b..d114b886a1597 100644
--- a/lldb/tools/lldb-dap/DAP.h
+++ b/lldb/tools/lldb-dap/DAP.h
@@ -156,7 +156,7 @@ struct DAP {
   std::unique_ptr<std::ofstream> log;
   llvm::StringMap<SourceBreakpointMap> source_breakpoints;
   FunctionBreakpointMap function_breakpoints;
-  std::vector<ExceptionBreakpoint> exception_breakpoints;
+  std::optional<std::vector<ExceptionBreakpoint>> exception_breakpoints;
   std::vector<std::string> init_commands;
   std::vector<std::string> pre_run_commands;
   std::vector<std::string> post_run_commands;
@@ -228,6 +228,8 @@ struct DAP {
 
   llvm::json::Value CreateTopLevelScopes();
 
+  void PopulateExceptionBreakpoints();
+
   /// \return
   ///   Attempt to determine if an expression is a variable expression or
   ///   lldb command using a hueristic based on the first term of the
diff --git a/lldb/tools/lldb-dap/lldb-dap.cpp b/lldb/tools/lldb-dap/lldb-dap.cpp
index 7746afb6cbbf3..470c9f84c6a20 100644
--- a/lldb/tools/lldb-dap/lldb-dap.cpp
+++ b/lldb/tools/lldb-dap/lldb-dap.cpp
@@ -16,6 +16,7 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <optional>
 #include <sys/stat.h>
 #include <sys/types.h>
 #if defined(_WIN32)
@@ -1586,6 +1587,7 @@ void request_initialize(const llvm::json::Object &request) {
   bool source_init_file = GetBoolean(arguments, "sourceInitFile", true);
 
   g_dap.debugger = lldb::SBDebugger::Create(source_init_file, log_cb, nullptr);
+  g_dap.PopulateExceptionBreakpoints();
   auto cmd = g_dap.debugger.GetCommandInterpreter().AddMultiwordCommand(
       "lldb-dap", "Commands for managing lldb-dap.");
   if (GetBoolean(arguments, "supportsStartDebuggingRequest", false)) {
@@ -1621,7 +1623,7 @@ void request_initialize(const llvm::json::Object &request) {
   body.try_emplace("supportsEvaluateForHovers", true);
   // Available filters or options for the setExceptionBreakpoints request.
   llvm::json::Array filters;
-  for (const auto &exc_bp : g_dap.exception_breakpoints) {
+  for (const auto &exc_bp : *g_dap.exception_breakpoints) {
     filters.emplace_back(CreateExceptionBreakpointFilter(exc_bp));
   }
   body.try_emplace("exceptionBreakpointFilters", std::move(filters));
@@ -2476,7 +2478,7 @@ void request_setExceptionBreakpoints(const llvm::json::Object &request) {
   // Keep a list of any exception breakpoint filter names that weren't set
   // so we can clear any exception breakpoints if needed.
   std::set<std::string> unset_filters;
-  for (const auto &bp : g_dap.exception_breakpoints)
+  for (const auto &bp : *g_dap.exception_breakpoints)
     unset_filters.insert(bp.filter);
 
   for (const auto &value : *filters) {

>From 33edc9e1296a4ace7a3236819e4b637efad7d78a Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng at google.com>
Date: Thu, 6 Jun 2024 10:36:20 -0400
Subject: [PATCH 2/6] removed assertion checks

---
 lldb/tools/lldb-dap/DAP.cpp | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/lldb/tools/lldb-dap/DAP.cpp b/lldb/tools/lldb-dap/DAP.cpp
index 807d27c2c869d..55196d041a88c 100644
--- a/lldb/tools/lldb-dap/DAP.cpp
+++ b/lldb/tools/lldb-dap/DAP.cpp
@@ -60,19 +60,19 @@ DAP::~DAP() = default;
 
 void DAP::PopulateExceptionBreakpoints() {
   exception_breakpoints = {};
-  if (debugger.SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
+  if (SBDebugger::SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
     exception_breakpoints->emplace_back("cpp_catch", "C++ Catch",
                                         lldb::eLanguageTypeC_plus_plus);
     exception_breakpoints->emplace_back("cpp_throw", "C++ Throw",
                                         lldb::eLanguageTypeC_plus_plus);
   }
-  if (debugger.SupportsLanguage(lldb::eLanguageTypeObjC)) {
+  if (SBDebugger::SupportsLanguage(lldb::eLanguageTypeObjC)) {
     exception_breakpoints->emplace_back("objc_catch", "Objective-C Catch",
                                         lldb::eLanguageTypeObjC);
     exception_breakpoints->emplace_back("objc_throw", "Objective-C Throw",
                                         lldb::eLanguageTypeObjC);
   }
-  if (debugger.SupportsLanguage(lldb::eLanguageTypeSwift)) {
+  if (SBDebugger::SupportsLanguage(lldb::eLanguageTypeSwift)) {
     exception_breakpoints->emplace_back("swift_catch", "Swift Catch",
                                         lldb::eLanguageTypeSwift);
     exception_breakpoints->emplace_back("swift_throw", "Swift Throw",
@@ -81,8 +81,24 @@ void DAP::PopulateExceptionBreakpoints() {
 }
 
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
-  assert(exception_breakpoints.has_value() &&
-         "PopulateExceptionBreakpoints must be called first");
+  // PopulateExceptionBreakpoints() is called after g_dap.debugger is created
+  // in a request-initialize.
+  //
+  // But this GetExceptionBreakpoint() method may be called before attaching, in
+  // which case, we may not have populated the filter yet.
+  //
+  // We also cannot call PopulateExceptionBreakpoints() in DAP::DAP() because
+  // we need SBDebugger::Initialize() to have been called before this.
+  //
+  // So just checking the filter list and do lazy-populating seems easiest.
+  // Two other options include:
+  //  + call g_dap.PopulateExceptionBreakpoints() in lldb-dap.cpp::main()
+  //    right after the call to SBDebugger::Initialize()
+  //  + Just call PopulateExceptionBreakpoints() to get a fresh list  everytime
+  //    we query (a bit overkill since it's not likely to change?)
+  if (!exception_breakpoints.has_value)
+    PopulateExceptionBreakpoints();
+
   for (auto &bp : *exception_breakpoints) {
     if (bp.filter == filter)
       return &bp;
@@ -91,8 +107,10 @@ ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
 }
 
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const lldb::break_id_t bp_id) {
-  assert(exception_breakpoints.has_value() &&
-         "PopulateExceptionBreakpoints must be called first");
+  // See comment in the other GetExceptionBreakpoint().
+  if (!exception_breakpoints.has_value)
+    PopulateExceptionBreakpoints();
+
   for (auto &bp : *exception_breakpoints) {
     if (bp.bp.GetID() == bp_id)
       return &bp;

>From e16b56aa5685853ceb76ab894dc46ce7e018b547 Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng at google.com>
Date: Thu, 6 Jun 2024 10:42:41 -0400
Subject: [PATCH 3/6] typo

---
 lldb/tools/lldb-dap/DAP.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lldb/tools/lldb-dap/DAP.cpp b/lldb/tools/lldb-dap/DAP.cpp
index 55196d041a88c..b6f5cbc919dc7 100644
--- a/lldb/tools/lldb-dap/DAP.cpp
+++ b/lldb/tools/lldb-dap/DAP.cpp
@@ -96,7 +96,7 @@ ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
   //    right after the call to SBDebugger::Initialize()
   //  + Just call PopulateExceptionBreakpoints() to get a fresh list  everytime
   //    we query (a bit overkill since it's not likely to change?)
-  if (!exception_breakpoints.has_value)
+  if (!exception_breakpoints.has_value())
     PopulateExceptionBreakpoints();
 
   for (auto &bp : *exception_breakpoints) {
@@ -108,7 +108,7 @@ ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
 
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const lldb::break_id_t bp_id) {
   // See comment in the other GetExceptionBreakpoint().
-  if (!exception_breakpoints.has_value)
+  if (!exception_breakpoints.has_value())
     PopulateExceptionBreakpoints();
 
   for (auto &bp : *exception_breakpoints) {

>From 92d09cd0fa9b06135d282f415b33bb1ab71d5ed8 Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng at google.com>
Date: Thu, 6 Jun 2024 12:34:38 -0400
Subject: [PATCH 4/6] added ns

---
 lldb/tools/lldb-dap/DAP.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lldb/tools/lldb-dap/DAP.cpp b/lldb/tools/lldb-dap/DAP.cpp
index b6f5cbc919dc7..f8e5e25a966ca 100644
--- a/lldb/tools/lldb-dap/DAP.cpp
+++ b/lldb/tools/lldb-dap/DAP.cpp
@@ -60,19 +60,19 @@ DAP::~DAP() = default;
 
 void DAP::PopulateExceptionBreakpoints() {
   exception_breakpoints = {};
-  if (SBDebugger::SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
+  if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
     exception_breakpoints->emplace_back("cpp_catch", "C++ Catch",
                                         lldb::eLanguageTypeC_plus_plus);
     exception_breakpoints->emplace_back("cpp_throw", "C++ Throw",
                                         lldb::eLanguageTypeC_plus_plus);
   }
-  if (SBDebugger::SupportsLanguage(lldb::eLanguageTypeObjC)) {
+  if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeObjC)) {
     exception_breakpoints->emplace_back("objc_catch", "Objective-C Catch",
                                         lldb::eLanguageTypeObjC);
     exception_breakpoints->emplace_back("objc_throw", "Objective-C Throw",
                                         lldb::eLanguageTypeObjC);
   }
-  if (SBDebugger::SupportsLanguage(lldb::eLanguageTypeSwift)) {
+  if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeSwift)) {
     exception_breakpoints->emplace_back("swift_catch", "Swift Catch",
                                         lldb::eLanguageTypeSwift);
     exception_breakpoints->emplace_back("swift_throw", "Swift Throw",

>From 38cd558693040d0af5f473ac682dc3e7c7549d8f Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng at google.com>
Date: Fri, 7 Jun 2024 11:19:35 -0400
Subject: [PATCH 5/6] wrap the population of exception_breakpoints in a
 call_once for safety

---
 lldb/tools/lldb-dap/DAP.cpp | 56 ++++++++++++++++++++-----------------
 lldb/tools/lldb-dap/DAP.h   |  1 +
 2 files changed, 32 insertions(+), 25 deletions(-)

diff --git a/lldb/tools/lldb-dap/DAP.cpp b/lldb/tools/lldb-dap/DAP.cpp
index f8e5e25a966ca..53a2120fc6565 100644
--- a/lldb/tools/lldb-dap/DAP.cpp
+++ b/lldb/tools/lldb-dap/DAP.cpp
@@ -59,25 +59,29 @@ DAP::DAP()
 DAP::~DAP() = default;
 
 void DAP::PopulateExceptionBreakpoints() {
-  exception_breakpoints = {};
-  if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
-    exception_breakpoints->emplace_back("cpp_catch", "C++ Catch",
-                                        lldb::eLanguageTypeC_plus_plus);
-    exception_breakpoints->emplace_back("cpp_throw", "C++ Throw",
-                                        lldb::eLanguageTypeC_plus_plus);
-  }
-  if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeObjC)) {
-    exception_breakpoints->emplace_back("objc_catch", "Objective-C Catch",
-                                        lldb::eLanguageTypeObjC);
-    exception_breakpoints->emplace_back("objc_throw", "Objective-C Throw",
-                                        lldb::eLanguageTypeObjC);
-  }
-  if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeSwift)) {
-    exception_breakpoints->emplace_back("swift_catch", "Swift Catch",
-                                        lldb::eLanguageTypeSwift);
-    exception_breakpoints->emplace_back("swift_throw", "Swift Throw",
-                                        lldb::eLanguageTypeSwift);
-  }
+  if (exception_breakpoints.has_value())
+    return;
+  llvm::call_once(initExceptionBreakpoints, [this]() {
+    exception_breakpoints = {};
+    if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {
+      exception_breakpoints->emplace_back("cpp_catch", "C++ Catch",
+                                          lldb::eLanguageTypeC_plus_plus);
+      exception_breakpoints->emplace_back("cpp_throw", "C++ Throw",
+                                          lldb::eLanguageTypeC_plus_plus);
+    }
+    if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeObjC)) {
+      exception_breakpoints->emplace_back("objc_catch", "Objective-C Catch",
+                                          lldb::eLanguageTypeObjC);
+      exception_breakpoints->emplace_back("objc_throw", "Objective-C Throw",
+                                          lldb::eLanguageTypeObjC);
+    }
+    if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeSwift)) {
+      exception_breakpoints->emplace_back("swift_catch", "Swift Catch",
+                                          lldb::eLanguageTypeSwift);
+      exception_breakpoints->emplace_back("swift_throw", "Swift Throw",
+                                          lldb::eLanguageTypeSwift);
+    }
+  });
 }
 
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
@@ -90,14 +94,15 @@ ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
   // We also cannot call PopulateExceptionBreakpoints() in DAP::DAP() because
   // we need SBDebugger::Initialize() to have been called before this.
   //
-  // So just checking the filter list and do lazy-populating seems easiest.
-  // Two other options include:
+  // So just calling PopulateExceptionBreakoints(),which does lazy-populating
+  // seems easiest. Two other options include:
   //  + call g_dap.PopulateExceptionBreakpoints() in lldb-dap.cpp::main()
   //    right after the call to SBDebugger::Initialize()
   //  + Just call PopulateExceptionBreakpoints() to get a fresh list  everytime
   //    we query (a bit overkill since it's not likely to change?)
-  if (!exception_breakpoints.has_value())
-    PopulateExceptionBreakpoints();
+  PopulateExceptionBreakpoints();
+  assert(exception_breakpoints.has_value() &&
+         "exception_breakpoints must have been populated");
 
   for (auto &bp : *exception_breakpoints) {
     if (bp.filter == filter)
@@ -108,8 +113,9 @@ ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const std::string &filter) {
 
 ExceptionBreakpoint *DAP::GetExceptionBreakpoint(const lldb::break_id_t bp_id) {
   // See comment in the other GetExceptionBreakpoint().
-  if (!exception_breakpoints.has_value())
-    PopulateExceptionBreakpoints();
+  PopulateExceptionBreakpoints();
+  assert(exception_breakpoints.has_value() &&
+         "exception_breakpoints must have been populated");
 
   for (auto &bp : *exception_breakpoints) {
     if (bp.bp.GetID() == bp_id)
diff --git a/lldb/tools/lldb-dap/DAP.h b/lldb/tools/lldb-dap/DAP.h
index d114b886a1597..daa0d9f1aa7f0 100644
--- a/lldb/tools/lldb-dap/DAP.h
+++ b/lldb/tools/lldb-dap/DAP.h
@@ -157,6 +157,7 @@ struct DAP {
   llvm::StringMap<SourceBreakpointMap> source_breakpoints;
   FunctionBreakpointMap function_breakpoints;
   std::optional<std::vector<ExceptionBreakpoint>> exception_breakpoints;
+  llvm::once_flag initExceptionBreakpoints;
   std::vector<std::string> init_commands;
   std::vector<std::string> pre_run_commands;
   std::vector<std::string> post_run_commands;

>From 9df5a14e1cd0ebab9a5f3933314665e23f31020c Mon Sep 17 00:00:00 2001
From: Vy Nguyen <vyng at google.com>
Date: Fri, 7 Jun 2024 11:24:37 -0400
Subject: [PATCH 6/6] remove redundant check

---
 lldb/tools/lldb-dap/DAP.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/lldb/tools/lldb-dap/DAP.cpp b/lldb/tools/lldb-dap/DAP.cpp
index 53a2120fc6565..263e841b7254d 100644
--- a/lldb/tools/lldb-dap/DAP.cpp
+++ b/lldb/tools/lldb-dap/DAP.cpp
@@ -59,8 +59,6 @@ DAP::DAP()
 DAP::~DAP() = default;
 
 void DAP::PopulateExceptionBreakpoints() {
-  if (exception_breakpoints.has_value())
-    return;
   llvm::call_once(initExceptionBreakpoints, [this]() {
     exception_breakpoints = {};
     if (lldb::SBDebugger::SupportsLanguage(lldb::eLanguageTypeC_plus_plus)) {



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