[lldb] [llgs] Implement qXfer:siginfo:read

Implement the qXfer:siginfo:read that is used to read the siginfo_t
(extended signal information) for the current thread.  This is currently
implemented on FreeBSD and Linux.

Differential Revision: https://reviews.llvm.org/D117113

1 files changed, 15 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
index a7e4e9b..50d8ce9 100644
--- a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
@@ -536,3 +536,18 @@ void NativeThreadLinux::MaybeLogStateChange(lldb::StateType new_state) {
 NativeProcessLinux &NativeThreadLinux::GetProcess() {
   return static_cast<NativeProcessLinux &>(m_process);
 }
+
+const NativeProcessLinux &NativeThreadLinux::GetProcess() const {
+  return static_cast<const NativeProcessLinux &>(m_process);
+}
+
+llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>>
+NativeThreadLinux::GetSiginfo() const {
+  auto siginfo_buf =
+      llvm::WritableMemoryBuffer::getNewUninitMemBuffer(sizeof(siginfo_t));
+  Status error =
+      GetProcess().GetSignalInfo(GetID(), siginfo_buf->getBufferStart());
+  if (!error.Success())
+    return error.ToError();
+  return siginfo_buf;
+}