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sys/ctrace: restart traced process when stopped by note

This commit is contained in:
Giacomo Tesio 2017-11-24 23:10:53 +01:00
parent bdce6c7f9c
commit f6e3784639
1 changed files with 11 additions and 2 deletions
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13
sys/src/cmd/sys/ctrace.c
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@ -54,10 +54,11 @@ cwrite(Reader *r, char *cmd, int ignore_errors)
void
reader(void *v)
{
int newpid;
int newpid, n;
Reader r;
Msg *s;
char *rf, *a[16];
long wakeup;
r.pid = (int)(uintptr)v;
r.tfd = r.cfd = -1;
@ -73,7 +74,10 @@ reader(void *v)
cwrite(&r, "stop", 0);
cwrite(&r, "startsyscall", 0);
while(pread(r.tfd, s->buf, sizeof(s->buf)-1, 0) > 0){
StartReading:
wakeup = awake(500);
while((n = pread(r.tfd, s->buf, sizeof(s->buf)-1, 0)) > 0){
forgivewkp(wakeup);
if(strstr(s->buf, " rfork ") != nil){
rf = strdup(s->buf);
if(tokenize(rf, a, 9) == 9
@ -94,6 +98,11 @@ reader(void *v)
r.msg = s = mallocz(sizeof(Msg), 1);
cwrite(&r, "startsyscall", 1);
wakeup = awake(500);
}
if(n < 0 && awakened(wakeup)){
cwrite(&r, "startsyscall", 0);
goto StartReading;
}
die(&r);
}