Create a HostThread abstraction.
This patch moves creates a thread abstraction that represents a
thread running inside the LLDB process. This is a replacement for
otherwise using lldb::thread_t, and provides a platform agnostic
interface to managing these threads.
Differential Revision: http://reviews.llvm.org/D5198
Reviewed by: Jim Ingham
llvm-svn: 217460
diff --git a/lldb/source/Host/freebsd/HostThreadFreeBSD.cpp b/lldb/source/Host/freebsd/HostThreadFreeBSD.cpp
new file mode 100644
index 0000000..ce2d44e
--- /dev/null
+++ b/lldb/source/Host/freebsd/HostThreadFreeBSD.cpp
@@ -0,0 +1,80 @@
+//===-- HostThreadFreeBSD.cpp -----------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// lldb Includes
+#include "lldb/Host/freebsd/HostThreadFreeBSD.h"
+
+// C includes
+#include <pthread.h>
+#include <pthread_np.h>
+#include <stdlib.h>
+#include <sys/sysctl.h>
+
+// C++ includes
+#include <string>
+
+using namespace lldb_private;
+
+HostThreadFreeBSD::HostThreadFreeBSD()
+{
+}
+
+HostThreadFreeBSD::HostThreadFreeBSD(lldb::thread_t thread)
+ : HostThreadPosix(thread)
+{
+}
+
+void
+HostThreadFreeBSD::SetName(lldb::thread_t thread, llvm::StringRef name)
+{
+ ::pthread_set_name_np(thread, name);
+}
+
+void
+HostThreadFreeBSD::GetName(lldb::thread_t thread, llvm::SmallVectorImpl<char> &name)
+{
+ name.clear();
+ int pid = Host::GetCurrentProcessID();
+
+ struct kinfo_proc *kp = nullptr, *nkp;
+ size_t len = 0;
+ int error;
+ int ctl[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID | KERN_PROC_INC_THREAD, (int)pid};
+
+ while (1)
+ {
+ error = sysctl(ctl, 4, kp, &len, nullptr, 0);
+ if (kp == nullptr || (error != 0 && errno == ENOMEM))
+ {
+ // Add extra space in case threads are added before next call.
+ len += sizeof(*kp) + len / 10;
+ nkp = (struct kinfo_proc *)realloc(kp, len);
+ if (nkp == nullptr)
+ {
+ free(kp);
+ return;
+ }
+ kp = nkp;
+ continue;
+ }
+ if (error != 0)
+ len = 0;
+ break;
+ }
+
+ for (size_t i = 0; i < len / sizeof(*kp); i++)
+ {
+ if (kp[i].ki_tid == (int)thread)
+ {
+ name.append(kp[i].ki_tdname, strlen(kp[i].ki_tdname));
+ break;
+ }
+ }
+ free(kp);
+}