[Lldb-commits] [lldb] [LLDB][FreeBSD] Implement DoStopIDBumped on FreeBSD (PR #195679)

[via lldb-commits]

https://github.com/aokblast created https://github.com/llvm/llvm-project/pull/195679

When stopping, we should clear the mmap cache and repopulate all regions to properly handle new mmap syscalls. Without this, binaries loaded via dlopen or user-initiated mmap calls will not be recognized as valid memory regions.

Fixes: https://github.com/llvm/llvm-project/issues/180445

>From 14259a447a78432ee1a2b4fa2c00474c65c7edc5 Mon Sep 17 00:00:00 2001
From: ShengYi Hung <aokblast at FreeBSD.org>
Date: Mon, 4 May 2026 23:25:57 +0800
Subject: [PATCH] [LLDB][FreeBSD] Implement DoStopIDBumped on FreeBSD

When stopping, we should clear the mmap cache and repopulate all regions
to properly handle new mmap syscalls. Without this, binaries loaded via
dlopen or user-initiated mmap calls will not be recognized as valid
memory regions.

Fixes: https://github.com/llvm/llvm-project/issues/180445
---
 .../Plugins/Process/FreeBSD/NativeProcessFreeBSD.cpp      | 8 ++++++++
 .../source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.cpp b/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.cpp
index 46e9ac1cfd6fa..fc215d1bb7ef5 100644
--- a/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.cpp
+++ b/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.cpp
@@ -1089,3 +1089,11 @@ NativeProcessFreeBSD::SaveCore(llvm::StringRef path_hint) {
       "PT_COREDUMP not supported in the FreeBSD version used to build LLDB");
 #endif
 }
+
+void NativeProcessFreeBSD::DoStopIDBumped(uint32_t newBumpId) {
+  Log *log = GetLog(POSIXLog::Process);
+  LLDB_LOG(log, "newBumpId={0}", newBumpId);
+  LLDB_LOG(log, "clearing {0} entries from memory region cache",
+           m_mem_region_cache.size());
+  m_mem_region_cache.clear();
+}
diff --git a/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.h b/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.h
index fb7372817265d..46e1f6564d3fb 100644
--- a/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.h
+++ b/lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.h
@@ -92,6 +92,8 @@ class NativeProcessFreeBSD : public NativeProcessELF,
 
   llvm::Expected<std::string> SaveCore(llvm::StringRef path_hint) override;
 
+  void DoStopIDBumped(uint32_t newBumpId) override;
+
 protected:
   llvm::Expected<llvm::ArrayRef<uint8_t>>
   GetSoftwareBreakpointTrapOpcode(size_t size_hint) override;