From 36d8f601e5837c1ac7217dca4492ad70e65d9de3 Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Tue, 16 Feb 2016 22:00:01 +0000
Subject: Fetch the current thread and it's syscall state from the trussinfo
 object instead of passing some of that state as arguments to print_syscall()
 and print_syscallret().  This just makes the calls of these functions shorter
 and easier to read.

---
 usr.bin/truss/setup.c    |  3 +--
 usr.bin/truss/syscall.h  |  5 ++---
 usr.bin/truss/syscalls.c | 43 ++++++++++++++++++++++++-------------------
 3 files changed, 27 insertions(+), 24 deletions(-)

(limited to 'usr.bin')

diff --git a/usr.bin/truss/setup.c b/usr.bin/truss/setup.c
index c0c15f0..24126ad 100644
--- a/usr.bin/truss/setup.c
+++ b/usr.bin/truss/setup.c
@@ -422,8 +422,7 @@ exit_syscall(struct trussinfo *info, struct ptrace_lwpinfo *pl)
 		}
 	}
 
-	print_syscall_ret(info, t->cs.name, t->cs.nargs, t->cs.s_args,
-	    errorp, retval, sc);
+	print_syscall_ret(info, errorp, retval);
 	free_syscall(t);
 
 	/*
diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index 41ac6e0..906f799 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -118,7 +118,6 @@ struct linux_socketcall_args {
 };
 
 void init_syscalls(void);
-void print_syscall(struct trussinfo *, const char *, int, char **);
-void print_syscall_ret(struct trussinfo *, const char *, int, char **, int,
-    long *, struct syscall *);
+void print_syscall(struct trussinfo *);
+void print_syscall_ret(struct trussinfo *, int, long *);
 void print_summary(struct trussinfo *trussinfo);
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index 8ff57db..ffb8b0a 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -2000,37 +2000,39 @@ print_arg(struct syscall_args *sc, unsigned long *args, long *retval,
 }
 
 /*
- * Print (to outfile) the system call and its arguments.  Note that
- * nargs is the number of arguments (not the number of words; this is
- * potentially confusing, I know).
+ * Print (to outfile) the system call and its arguments.
  */
 void
-print_syscall(struct trussinfo *trussinfo, const char *name, int nargs,
-    char **s_args)
+print_syscall(struct trussinfo *trussinfo)
 {
 	struct timespec timediff;
-	int i, len;
+	struct threadinfo *t;
+	const char *name;
+	char **s_args;
+	int i, len, nargs;
 
 	len = 0;
+	t = trussinfo->curthread;
 	if (trussinfo->flags & FOLLOWFORKS)
 		len += fprintf(trussinfo->outfile, "%5d: ",
-		    trussinfo->curthread->proc->pid);
+		    t->proc->pid);
 
+	name = t->cs.name;
+	nargs = t->cs.nargs;
+	s_args = t->cs.s_args;
 	if (name != NULL && (strcmp(name, "execve") == 0 ||
 	    strcmp(name, "exit") == 0)) {
-		clock_gettime(CLOCK_REALTIME, &trussinfo->curthread->after);
+		clock_gettime(CLOCK_REALTIME, &t->after);
 	}
 
 	if (trussinfo->flags & ABSOLUTETIMESTAMPS) {
-		timespecsubt(&trussinfo->curthread->after,
-		    &trussinfo->start_time, &timediff);
+		timespecsubt(&t->after, &trussinfo->start_time, &timediff);
 		len += fprintf(trussinfo->outfile, "%jd.%09ld ",
 		    (intmax_t)timediff.tv_sec, timediff.tv_nsec);
 	}
 
 	if (trussinfo->flags & RELATIVETIMESTAMPS) {
-		timespecsubt(&trussinfo->curthread->after,
-		    &trussinfo->curthread->before, &timediff);
+		timespecsubt(&t->after, &t->before, &timediff);
 		len += fprintf(trussinfo->outfile, "%jd.%09ld ",
 		    (intmax_t)timediff.tv_sec, timediff.tv_nsec);
 	}
@@ -2038,7 +2040,7 @@ print_syscall(struct trussinfo *trussinfo, const char *name, int nargs,
 	len += fprintf(trussinfo->outfile, "%s(", name);
 
 	for (i = 0; i < nargs; i++) {
-		if (s_args[i])
+		if (s_args[i] != NULL)
 			len += fprintf(trussinfo->outfile, "%s", s_args[i]);
 		else
 			len += fprintf(trussinfo->outfile,
@@ -2052,15 +2054,18 @@ print_syscall(struct trussinfo *trussinfo, const char *name, int nargs,
 }
 
 void
-print_syscall_ret(struct trussinfo *trussinfo, const char *name, int nargs,
-    char **s_args, int errorp, long *retval, struct syscall *sc)
+print_syscall_ret(struct trussinfo *trussinfo, int errorp, long *retval)
 {
 	struct timespec timediff;
+	struct threadinfo *t;
+	struct syscall *sc;
+	int error;
 
+	t = trussinfo->curthread;
+	sc = t->cs.sc;
 	if (trussinfo->flags & COUNTONLY) {
-		clock_gettime(CLOCK_REALTIME, &trussinfo->curthread->after);
-		timespecsubt(&trussinfo->curthread->after,
-		    &trussinfo->curthread->before, &timediff);
+		clock_gettime(CLOCK_REALTIME, &t->after);
+		timespecsubt(&t->after, &t->before, &timediff);
 		timespecadd(&sc->time, &timediff, &sc->time);
 		sc->ncalls++;
 		if (errorp)
@@ -2068,7 +2073,7 @@ print_syscall_ret(struct trussinfo *trussinfo, const char *name, int nargs,
 		return;
 	}
 
-	print_syscall(trussinfo, name, nargs, s_args);
+	print_syscall(trussinfo);
 	fflush(trussinfo->outfile);
 	if (errorp)
 		fprintf(trussinfo->outfile, " ERR#%ld '%s'\n", retval[0],
-- 
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