plan9port

t.c (5664B)

---

 #include <u.h>
 #include <thread_db.h>
 #include <sys/ptrace.h>
 #include <errno.h>
 #include <sys/procfs.h>	/* psaddr_t */
 #include <libc.h>
 #include <mach.h>
 #include "ureg386.h"
 
 int td_get_allthreads(td_thragent_t *ta, td_thrhandle_t **pall);
 
 static char *tderrstr[] =
 {
 [TD_OK]			"no error",
 [TD_ERR]		"some error",
 [TD_NOTHR]		"no matching thread found",
 [TD_NOSV]		"no matching synchronization handle found",
 [TD_NOLWP]		"no matching light-weight process found",
 [TD_BADPH]		"invalid process handle",
 [TD_BADTH]		"invalid thread handle",
 [TD_BADSH]		"invalid synchronization handle",
 [TD_BADTA]		"invalid thread agent",
 [TD_BADKEY]		"invalid key",
 [TD_NOMSG]		"no event available",
 [TD_NOFPREGS]	"no floating-point register content available",
 [TD_NOLIBTHREAD]	"application not linked with thread library",
 [TD_NOEVENT]	"requested event is not supported",
 [TD_NOEVENT]	"requested event is not supported",
 [TD_NOCAPAB]	"capability not available",
 [TD_DBERR]		"internal debug library error",
 [TD_NOAPLIC]	"operation is not applicable",
 [TD_NOTSD]		"no thread-specific data available",
 [TD_MALLOC]		"out of memory",
 [TD_PARTIALREG]	"not entire register set was read or written",
 [TD_NOXREGS]	"X register set not available for given threads",
 [TD_TLSDEFER]	"thread has not yet allocated TLS for given module",
 [TD_VERSION]	"version mismatch twixt libpthread and libthread_db",
 [TD_NOTLS]		"there is no TLS segment in the given module",
 };
 
 static char*
 terr(int e)
 {
 	static char buf[50];
 
 	if(e < 0 || e >= nelem(tderrstr) || tderrstr[e] == nil){
 		snprint(buf, sizeof buf, "thread err %d", e);
 		return buf;
 	}
 	return tderrstr[e];
 }
 
 void
 usage(void)
 {
 	fprint(2, "usage: t pid\n");
 	exits("usage");
 }
 
 #define	STRINGSZ	128
 
 /*
  *	print the value of dot as file:line
  */
 void
 printsource(long dot)
 {
 	char str[STRINGSZ];
 
 	if (fileline(dot, str, STRINGSZ) >= 0)
 		print("%s", str);
 }
 
 void
 printlocals(Symbol *fn, Regs *regs)
 {
 	int i;
 	u32int v;
 	Symbol s;
 
 	for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
 		if (s.class != CAUTO)
 			continue;
 		if(lget4(cormap, regs, s.loc, &v) >= 0)
 			print("\t%s.%s/\t%#lux\n", fn->name, s.name, v);
 		else
 			print("\t%s.%s/\t?\n", fn->name, s.name);
 	}
 }
 
 void
 printparams(Symbol *fn, Regs *regs)
 {
 	int i;
 	Symbol s;
 	u32int v;
 	int first = 0;
 	ulong pc, sp, bp;
 
 	if(0) print("pc=%lux sp=%lux bp=%lux ",
 		(rget(regs, "PC", &pc), pc),
 		(rget(regs, "SP", &sp), sp),
 		(rget(regs, "BP", &bp), bp));
 	for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
 		if (s.class != CPARAM)
 			continue;
 		if (first++)
 			print(", ");
 		if(0) print("(%d.%s.%ux.%x)", s.loc.type, s.loc.reg, s.loc.addr, s.loc.offset);
 		if(lget4(cormap, regs, s.loc, &v) >= 0)
 			print("%s=%#lux", s.name, v);
 		else
 			print("%s=?", s.name);
 	}
 }
 
 /*
  *	callback on stack trace
  */
 static int
 xtrace(Map *map, Regs *regs, ulong pc, ulong nextpc, Symbol *sym, int depth)
 {
 	char buf[512];
 
 	USED(map);
 	print("\t");
 	if(sym){
 		print("%s(", sym->name);
 		printparams(sym, regs);
 		print(")+0x%ux ", pc-sym->loc.addr);
 	}else
 		print("%#lux ", pc);
 	printsource(pc);
 
 	print(" called from ");
 	symoff(buf, 512, nextpc, CTEXT);
 	print("%s ", buf);
 /*	printsource(nextpc); */
 	print("\n");
 	if(sym)
 		printlocals(sym, regs);
 	return depth<40;
 }
 
 void
 main(int argc, char **argv)
 {
 	struct ps_prochandle p;
 	prgregset_t regs;
 	int e;
 	td_thragent_t *ta;
 	td_thrhandle_t *ts;
 	td_thrinfo_t info;
 	int i, n;
 	Ureg *u;
 	UregRegs r;
 
 	ARGBEGIN{
 	default:
 		usage();
 	}ARGEND
 
 	attachargs(argc, argv, OREAD);
 	attachdynamic();
 
 /*	if(!corpid && !corhdr) */
 /*		sysfatal("could not attach to process"); */
 /* */
 	p.pid = corpid;
 	if((e = td_ta_new(&p, &ta)) != TD_OK)
 		sysfatal("td_ta_new: %s", terr(e));
 	if((e = td_ta_get_nthreads(ta, &n)) != TD_OK)
 		sysfatal("td_ta_get_nthreads: %s", terr(e));
 	print("%d threads\n", n);
 
 	if((n = td_get_allthreads(ta, &ts)) < 0)
 		sysfatal("td_get_allthreads: %r");
 	print("%d threads - regs = %p\n", n, regs);
 	for(i=0; i<n; i++){
 		if((e = td_thr_get_info(&ts[i], &info)) != TD_OK)
 			sysfatal("td_thr_get_info: %s", terr(e));
 		print("%d: startfunc=%lux stkbase=%lux pc=%lux sp=%lux lid=%d\n",
 			i, info.ti_startfunc, info.ti_stkbase, info.ti_pc, info.ti_sp, info.ti_lid);
 		if((e = td_thr_getgregs(&ts[i], regs)) != TD_OK)
 			sysfatal("td_thr_getregs: %s", terr(e));
 		print("%d: pc=%lux sp=%lux gs=%lux\n", i, regs[12], regs[15], regs[10]);
 		if((u = _linux2ureg386((UregLinux386*)regs)) == nil)
 			sysfatal("%r");
 		r.r.rw = _uregrw;
 		r.ureg = (uchar*)u;
 		stacktrace(cormap, &r.r, xtrace);
 	}
 	exits(0);
 }
 
 typedef struct AllThread AllThread;
 struct AllThread
 {
 	td_thrhandle_t *a;
 	int n;
 	int err;
 };
 
 static int
 thritercb(const td_thrhandle_t *th, void *cb)
 {
 	td_thrhandle_t **p;
 	AllThread *a;
 	int n;
 
 	a = cb;
 	if((a->n&(a->n-1)) == 0){
 		if(a->n == 0)
 			n = 1;
 		else
 			n = a->n<<1;
 		if((p = realloc(a->a, n*sizeof a->a[0])) == 0){
 			a->err = -1;
 			return -1;	/* stop iteration */
 		}
 		a->a = p;
 	}
 	a->a[a->n++] = *th;
 	return 0;
 }
 
 int
 td_get_allthreads(td_thragent_t *ta, td_thrhandle_t **pall)
 {
 	int e;
 	AllThread a;
 
 	a.a = nil;
 	a.n = 0;
 	a.err = 0;
 	if((e = td_ta_thr_iter(ta, thritercb, &a,
 		TD_THR_ANY_STATE,
 		TD_THR_LOWEST_PRIORITY,
 		TD_SIGNO_MASK,
 		TD_THR_ANY_USER_FLAGS)) != TD_OK){
 		werrstr("%s", terr(e));
 		return -1;
 	}
 
 	if(a.err){
 		free(a.a);
 		return -1;
 	}
 
 	*pall = a.a;
 	return a.n;
 }
 
 /*
 td_err_e td_ta_map_id2thr(const td_thragent_t *ta_p, thread_t tid,td_thrhandle_t *th_p);
 */
 
 /*
 int
 threadregs(int tid, Regs **rp)
 {
 	check pid
 	look up tid (td_ta_map_id2thr)
 	create Regs with thr handle inside
 	rw function calls thr_getregs and then
 		pulls out the desired register
 }
 
 */