Little fixes.

src/lib9/_p9proc.c

@@ -45,14 +45,17 @@ _p9uproc(int inhandler)
 			h = 0;
 	}
 
-	if(inhandler)
-		sysfatal("did not find uproc in signal handler");
+	if(inhandler){
+		fprint(2, "%s: did not find uproc for pid %d in signal handler\n", argv0, pid);
+		abort();	
+	}
 
 	/* need to allocate */
 	while((up = mallocz(sizeof(Uproc), 1)) == nil)
 		sleep(1000);
 
-	up = mallocz(sizeof(Uproc), 1);
+fprint(2, "alloc uproc for pid %d\n", pid);
+	up->pid = pid;
 	lock(&uproclock);
 	h = pid%PIDHASH;
 	for(i=0; i<PIDHASH; i++){
@@ -79,6 +82,7 @@ _p9uprocdie(void)
 	int pid, i, h;
 
 	pid = getpid();
+fprint(2, "reap uproc for pid %d\n", pid);
 	h = pid%PIDHASH;
 	for(i=0; i<PIDHASH; i++){
 		up = alluproc[h];

src/lib9/ffork-FreeBSD.c

@@ -4,14 +4,19 @@ extern int __isthreaded;
 int
 ffork(int flags, void(*fn)(void*), void *arg)
 {
+	int pid;
 	void *p;
 
+	_p9uproc(0);
 	__isthreaded = 1;
 	p = malloc(16384);
 	if(p == nil)
 		return -1;
 	memset(p, 0xFE, 16384);
-	return rfork_thread(RFPROC|flags, (char*)p+16000, (int(*)(void*))fn, arg);
+	pid = rfork_thread(RFPROC|flags, (char*)p+16000, (int(*)(void*))fn, arg);
+	if(pid == 0)
+		_p9uproc(0);
+	return pid;
 }
 
 /*

src/lib9/ffork-Linux.c

@@ -1,18 +1,41 @@
+#include <u.h>
 #include <sched.h>
 #include <signal.h>
-#include <lib9.h>
+#include <libc.h>
+#include "9proc.h"
 
 int fforkstacksize = 16384;
 
+static int
+tramp(void *v)
+{
+	void (*fn)(void*), *arg;
+	void **v2;
+
+	_p9uproc(0);
+	v2 = v;
+	fn = v2[0];
+	arg = v2[1];
+	free(v2);
+	fn(arg);
+	return 0;
+}
+	
 int
 ffork(int flags, void (*fn)(void*), void *arg)
 {
+	void **v;
 	char *p;
 	int cloneflag, pid;
 
+	_p9uproc(0);
 	p = malloc(fforkstacksize);
-	if(p == nil)
+	v = malloc(sizeof(void*)*2);
+	if(p==nil || v==nil){
+		free(p);
+		free(v);
 		return -1;
+	}
 	cloneflag = 0;
 	flags &= ~RFPROC;
 	if(flags&RFMEM){
@@ -29,9 +52,13 @@ ffork(int flags, void (*fn)(void*), void *arg)
 		flags &= ~RFNOWAIT;
 	if(flags){
 		fprint(2, "unknown rfork flags %x\n", flags);
+		free(p);
+		free(v);
 		return -1;
 	}
-	pid = clone((int(*)(void*))fn, p+fforkstacksize-16, cloneflag, arg);
+	v[0] = fn;
+	v[1] = arg;
+	pid = clone(tramp, p+fforkstacksize-16, cloneflag, v);
 	if(pid < 0)
 		free(p);
 	return pid;

src/lib9/ffork-pthread.c

@@ -14,8 +14,11 @@ ffork(int flags, void(*fn)(void*), void *arg)
 		return -1;
 	}
 
+	_p9uproc(0);
 	if(pthread_create(&tid, NULL, (void*(*)(void*))fn, arg) < 0)
 		return -1;
+	if((int)tid == 0)
+		_p9uproc(0);
 	return (int)tid;
 }
 

src/lib9/main.c

@@ -7,6 +7,7 @@ extern void p9main(int, char**);
 int
 main(int argc, char **argv)
 {
+	_p9uproc(0);
 	p9main(argc, argv);
 	exits("main");
 	return 99;