From bdb4f28edece4b81e99becf4ffcdc69449211764 Mon Sep 17 00:00:00 2001
From: James Y Knight <jyknight@google.com>
Date: Thu, 1 Aug 2019 12:43:08 -0400
Subject: [PATCH] Add gettid and tgkill syscall wrappers.

---
 include/signal.h   | 1 +
 include/unistd.h   | 1 +
 src/linux/gettid.c | 8 ++++++++
 src/linux/tgkill.c | 8 ++++++++
 4 files changed, 18 insertions(+)
 create mode 100644 src/linux/gettid.c
 create mode 100644 src/linux/tgkill.c

diff --git a/include/signal.h b/include/signal.h
index 5c48cb83..6843323a 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -257,6 +257,7 @@ void (*bsd_signal(int, void (*)(int)))(int);
 int sigisemptyset(const sigset_t *);
 int sigorset (sigset_t *, const sigset_t *, const sigset_t *);
 int sigandset(sigset_t *, const sigset_t *, const sigset_t *);
+int tgkill(pid_t, pid_t, int);
 
 #define SA_NOMASK SA_NODEFER
 #define SA_ONESHOT SA_RESETHAND
diff --git a/include/unistd.h b/include/unistd.h
index 9485da7a..4764f157 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -188,6 +188,7 @@ char *get_current_dir_name(void);
 int syncfs(int);
 int euidaccess(const char *, int);
 int eaccess(const char *, int);
+pid_t gettid(void);
 #endif
 
 #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
diff --git a/src/linux/gettid.c b/src/linux/gettid.c
new file mode 100644
index 00000000..6490101d
--- /dev/null
+++ b/src/linux/gettid.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <unistd.h>
+#include "syscall.h"
+
+pid_t gettid(void)
+{
+	return __syscall(SYS_gettid);
+}
diff --git a/src/linux/tgkill.c b/src/linux/tgkill.c
new file mode 100644
index 00000000..97365d58
--- /dev/null
+++ b/src/linux/tgkill.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <signal.h>
+#include "syscall.h"
+
+int tgkill(pid_t pid, pid_t tid, int sig)
+{
+	return syscall(SYS_tgkill, pid, tid, sig);
+}
-- 
2.22.0.770.g0f2c4a37fd-goog