From 005b66cec8dc823a05ee63ef8ce4fe41eae9db6c Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Mon, 13 Oct 2014 16:37:06 +0000
Subject: Decode the arguments passed to _umtx_op().  In particular, decode the
 opcode.

MFC after:	1 week
Sponsored by:	Norse
---
 usr.bin/truss/syscall.h  |  5 +++--
 usr.bin/truss/syscalls.c | 21 +++++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

(limited to 'usr.bin/truss')

diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index f13fa8b..a573611 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -5,6 +5,7 @@
  * Hex -- values that should be printed in hex (addresses)
  * Octal -- Same as above, but octal
  * Int -- normal integer values (file descriptors, for example)
+ * LongHex -- long value that should be printed in hex
  * Name -- pointer to a NULL-terminated string.
  * BinString -- pointer to an array of chars, printed via strvisx().
  * Ptr -- pointer to some unspecified structure.  Just print as hex for now.
@@ -34,13 +35,13 @@
  * $FreeBSD$
  */
 
-enum Argtype { None = 1, Hex, Octal, Int, Name, Ptr, Stat, Ioctl, Quad,
+enum Argtype { None = 1, Hex, Octal, Int, LongHex, Name, Ptr, Stat, Ioctl, Quad,
 	Signal, Sockaddr, StringArray, Timespec, Timeval, Itimerval, Pollfd,
 	Fd_set, Sigaction, Fcntl, Mprot, Mmapflags, Whence, Readlinkres,
 	Sigset, Sigprocmask, Kevent, Sockdomain, Socktype, Open,
 	Fcntlflag, Rusage, BinString, Shutdown, Resource, Rlimit, Timeval2,
 	Pathconf, Rforkflags, ExitStatus, Waitoptions, Idtype, Procctl,
-	LinuxSockArgs };
+	LinuxSockArgs, Umtxop };
 
 #define	ARG_MASK	0xff
 #define	OUT	0x100
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index ebdc72e..700af60 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -279,6 +279,9 @@ static struct syscall syscalls[] = {
 		    { Waitoptions, 3 }, { Rusage | OUT, 4 }, { Ptr, 5 } } },
 	{ .name = "procctl", .ret_type = 1, .nargs = 4,
 	  .args = { { Idtype, 0 }, { Int, 1 }, { Procctl, 2 }, { Ptr, 3 } } },
+	{ .name = "_umtx_op", .ret_type = 1, .nargs = 5,
+	  .args = { { Ptr, 0 }, { Umtxop, 1 }, { LongHex, 2 }, { Ptr, 3 },
+		    { Ptr, 4 } } },
 	{ .name = 0 },
 };
 
@@ -412,6 +415,18 @@ static struct xlat procctl_arg[] = {
 	X(PROC_SPROTECT) XEND
 };
 
+static struct xlat umtx_ops[] = {
+	X(UMTX_OP_RESERVED0) X(UMTX_OP_RESERVED1) X(UMTX_OP_WAIT)
+	X(UMTX_OP_WAKE) X(UMTX_OP_MUTEX_TRYLOCK) X(UMTX_OP_MUTEX_LOCK)
+	X(UMTX_OP_MUTEX_UNLOCK) X(UMTX_OP_SET_CEILING) X(UMTX_OP_CV_WAIT)
+	X(UMTX_OP_CV_SIGNAL) X(UMTX_OP_CV_BROADCAST) X(UMTX_OP_WAIT_UINT)
+	X(UMTX_OP_RW_RDLOCK) X(UMTX_OP_RW_WRLOCK) X(UMTX_OP_RW_UNLOCK)
+	X(UMTX_OP_WAIT_UINT_PRIVATE) X(UMTX_OP_WAKE_PRIVATE)
+	X(UMTX_OP_MUTEX_WAIT) X(UMTX_OP_MUTEX_WAKE) X(UMTX_OP_SEM_WAIT)
+	X(UMTX_OP_SEM_WAKE) X(UMTX_OP_NWAKE_PRIVATE) X(UMTX_OP_MUTEX_WAKE2)
+	XEND
+};
+
 #undef X
 #undef XEND
 
@@ -608,6 +623,9 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
 	case Int:
 		asprintf(&tmp, "%d", (int)args[sc->offset]);
 		break;
+	case LongHex:
+		asprintf(&tmp, "0x%lx", args[sc->offset]);
+		break;		
 	case Name: {
 		/* NULL-terminated string. */
 		char *tmp2;
@@ -1275,6 +1293,9 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
 	case Procctl:
 		tmp = strdup(xlookup(procctl_arg, args[sc->offset]));
 		break;
+	case Umtxop:
+		tmp = strdup(xlookup(umtx_ops, args[sc->offset]));
+		break;
 	default:
 		errx(1, "Invalid argument type %d\n", sc->type & ARG_MASK);
 	}
-- 
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