[Lldb-commits] [lldb] [LLDB] Add SI_USER and SI_KERNEL to Linux signals (PR #144800)

[Jacob Lalonde via lldb-commits]

https://github.com/Jlalond updated 
https://github.com/llvm/llvm-project/pull/144800

>From 157b5a5177784bc2ce4e8bf952c812aedd5be258 Mon Sep 17 00:00:00 2001
From: Jacob Lalonde <jalalo...@fb.com>
Date: Wed, 18 Jun 2025 14:35:37 -0700
Subject: [PATCH 1/2] Add SI_USER and SI_KERNEL to Linux signals

---
 lldb/source/Plugins/Process/Utility/LinuxSignals.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp 
b/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp
index 15a77ce227ec5..4c49bde936965 100644
--- a/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp
+++ b/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp
@@ -65,6 +65,10 @@
 // See siginfo.h in the Linux Kernel, these codes can be sent for any signal.
 #define ADD_LINUX_SIGNAL(signo, name, ...)                                     
\
   AddSignal(signo, name, __VA_ARGS__);                                         
\
+  ADD_SIGCODE(signo, signo, SI_USER, 0, "sent by kill, sigsend or raise",      
\
+              SignalCodePrintOption::Sender);                                  
\
+  ADD_SIGCODE(signo, signo, SI_KERNEL, 0x80, "sent by kernel",                 
\
+              SignalCodePrintOption::Sender);                                  
\
   ADD_SIGCODE(signo, signo, SI_QUEUE, -1, "sent by sigqueue",                  
\
               SignalCodePrintOption::Sender);                                  
\
   ADD_SIGCODE(signo, signo, SI_TIMER, -2, "sent by timer expiration",          
\

>From 8bf001190cb54b55575286e9cceb72cadbfdbf97 Mon Sep 17 00:00:00 2001
From: Jacob Lalonde <jalalo...@fb.com>
Date: Tue, 24 Jun 2025 09:39:00 -0700
Subject: [PATCH 2/2] Add SI_KERNEL into the description as well.

---
 lldb/source/Host/common/NativeProcessProtocol.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lldb/source/Host/common/NativeProcessProtocol.cpp 
b/lldb/source/Host/common/NativeProcessProtocol.cpp
index 405acbb5662d6..33755e3e25d8a 100644
--- a/lldb/source/Host/common/NativeProcessProtocol.cpp
+++ b/lldb/source/Host/common/NativeProcessProtocol.cpp
@@ -340,6 +340,9 @@ void NativeProcessProtocol::NotifyDidExec() {
 
 Status NativeProcessProtocol::SetSoftwareBreakpoint(lldb::addr_t addr,
                                                     uint32_t size_hint) {
+                                                      
+  volatile bool debug = true;
+  while (debug) {}                                                      
   Log *log = GetLog(LLDBLog::Breakpoints);
   LLDB_LOG(log, "addr = {0:x}, size_hint = {1}", addr, size_hint);
 
@@ -362,9 +365,10 @@ Status 
NativeProcessProtocol::RemoveSoftwareBreakpoint(lldb::addr_t addr) {
   auto it = m_software_breakpoints.find(addr);
   if (it == m_software_breakpoints.end())
     return Status::FromErrorString("Breakpoint not found.");
-  assert(it->second.ref_count > 0);
-  if (--it->second.ref_count > 0)
+  if (it->second.ref_count > 0) {
+    --it->second.ref_count;
     return Status();
+  }
 
   // This is the last reference. Let's remove the breakpoint.
   Status error;

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