[Lldb-commits] [lldb] [lldb][GDBRemote] Parse MultiBreakpoint+ capability (PR #192962)

[Felipe de Azevedo Piovezan via lldb-commits]

https://github.com/felipepiovezan updated https://github.com/llvm/llvm-project/pull/192962

>From c8107a2c647c00bda5200b4a113feb275a5fecd4 Mon Sep 17 00:00:00 2001
From: Felipe de Azevedo Piovezan <fpiovezan at apple.com>
Date: Tue, 24 Mar 2026 08:39:54 +0000
Subject: [PATCH] [lldb][GDBRemote] Parse MultiBreakpoint+ capability

---
 .../GDBRemoteCommunicationClient.cpp          | 10 +++++++++
 .../gdb-remote/GDBRemoteCommunicationClient.h |  3 +++
 .../GDBRemoteCommunicationClientTest.cpp      | 22 +++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index 43c6490d5d889..5f397071c8be6 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -217,6 +217,12 @@ bool GDBRemoteCommunicationClient::GetMultiMemReadSupported() {
   return m_supports_multi_mem_read == eLazyBoolYes;
 }
 
+bool GDBRemoteCommunicationClient::GetMultiBreakpointSupported() {
+  if (m_supports_multi_breakpoint == eLazyBoolCalculate)
+    GetRemoteQSupported();
+  return m_supports_multi_breakpoint == eLazyBoolYes;
+}
+
 bool GDBRemoteCommunicationClient::QueryNoAckModeSupported() {
   if (m_supports_not_sending_acks == eLazyBoolCalculate) {
     m_send_acks = true;
@@ -346,6 +352,7 @@ void GDBRemoteCommunicationClient::ResetDiscoverableSettings(bool did_exec) {
     m_supported_async_json_packets_sp.reset();
     m_supports_jModulesInfo = true;
     m_supports_multi_mem_read = eLazyBoolCalculate;
+    m_supports_multi_breakpoint = eLazyBoolCalculate;
   }
 
   // These flags should be reset when we first connect to a GDB server and when
@@ -373,6 +380,7 @@ void GDBRemoteCommunicationClient::GetRemoteQSupported() {
   m_supports_reverse_continue = eLazyBoolNo;
   m_supports_reverse_step = eLazyBoolNo;
   m_supports_multi_mem_read = eLazyBoolNo;
+  m_supports_multi_breakpoint = eLazyBoolNo;
 
   m_max_packet_size = UINT64_MAX; // It's supposed to always be there, but if
                                   // not, we assume no limit
@@ -434,6 +442,8 @@ void GDBRemoteCommunicationClient::GetRemoteQSupported() {
         m_supports_reverse_step = eLazyBoolYes;
       else if (x == "MultiMemRead+")
         m_supports_multi_mem_read = eLazyBoolYes;
+      else if (x == "jMultiBreakpoint+")
+        m_supports_multi_breakpoint = eLazyBoolYes;
       // Look for a list of compressions in the features list e.g.
       // qXfer:features:read+;PacketSize=20000;qEcho+;SupportedCompressions=zlib-
       // deflate,lzma
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
index 6b5ed99583439..79ca0bcd3ed22 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
@@ -344,6 +344,8 @@ class GDBRemoteCommunicationClient : public GDBRemoteClientBase {
 
   bool GetMultiMemReadSupported();
 
+  bool GetMultiBreakpointSupported();
+
   LazyBool SupportsAllocDeallocMemory() // const
   {
     // Uncomment this to have lldb pretend the debug server doesn't respond to
@@ -579,6 +581,7 @@ class GDBRemoteCommunicationClient : public GDBRemoteClientBase {
   LazyBool m_supports_reverse_continue = eLazyBoolCalculate;
   LazyBool m_supports_reverse_step = eLazyBoolCalculate;
   LazyBool m_supports_multi_mem_read = eLazyBoolCalculate;
+  LazyBool m_supports_multi_breakpoint = eLazyBoolCalculate;
 
   bool m_supports_qProcessInfoPID : 1, m_supports_qfProcessInfo : 1,
       m_supports_qUserName : 1, m_supports_qGroupName : 1,
diff --git a/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp b/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp
index d8cc3ff4f7d19..3ec212b1c205d 100644
--- a/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp
+++ b/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp
@@ -729,3 +729,25 @@ TEST_F(GDBRemoteCommunicationClientTest, MultiMemReadNotSupported) {
   ASSERT_FALSE(client.GetMultiMemReadSupported());
   async_result.wait();
 }
+
+TEST_F(GDBRemoteCommunicationClientTest, MultiBreakpointdSupported) {
+  std::future<bool> async_result = std::async(std::launch::async, [&] {
+    StringExtractorGDBRemote qSupported_packet_request;
+    server.GetPacket(qSupported_packet_request);
+    server.SendPacket("jMultiBreakpoint+;");
+    return true;
+  });
+  ASSERT_TRUE(client.GetMultiBreakpointSupported());
+  async_result.wait();
+}
+
+TEST_F(GDBRemoteCommunicationClientTest, MultiBreakpointdNotSupported) {
+  std::future<bool> async_result = std::async(std::launch::async, [&] {
+    StringExtractorGDBRemote qSupported_packet_request;
+    server.GetPacket(qSupported_packet_request);
+    server.SendPacket(";");
+    return true;
+  });
+  ASSERT_FALSE(client.GetMultiBreakpointSupported());
+  async_result.wait();
+}