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//===-- 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"
#include "lldb/Host/Host.h"
// C includes
#include <errno.h>
#include <pthread.h>
#if defined(__FreeBSD__)
#include <pthread_np.h>
#endif
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/user.h>
// C++ includes
#include <string>
using namespace lldb_private;
HostThreadFreeBSD::HostThreadFreeBSD() {}
HostThreadFreeBSD::HostThreadFreeBSD(lldb::thread_t thread)
: HostThreadPosix(thread) {}
void HostThreadFreeBSD::GetName(lldb::tid_t tid,
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 == (lwpid_t)tid) {
name.append(kp[i].ki_tdname, kp[i].ki_tdname + strlen(kp[i].ki_tdname));
break;
}
}
free(kp);
}
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