ref: c3ba64f6935322f09b6de5c2285544fd471c605d
dir: /sys/src/cmd/db/print.c/
/*
*
* debugger
*
*/
#include "defs.h"
#include "fns.h"
extern int infile;
extern int outfile;
extern int maxpos;
/* general printing routines ($) */
char *Ipath = INCDIR;
static int tracetype;
static void printfp(Map*, int);
/*
* callback on stack trace
*/
static void
ptrace(Map *map, uvlong pc, uvlong sp, Symbol *sym)
{
char buf[512];
USED(map);
dprint("%s(", sym->name);
printparams(sym, sp);
dprint(") ");
printsource(sym->value);
dprint(" called from ");
symoff(buf, 512, pc, CTEXT);
dprint("%s ", buf);
printsource(pc);
dprint("\n");
if(tracetype == 'C')
printlocals(sym, sp);
}
void
printtrace(int modif)
{
int i;
uvlong pc, sp, link;
ulong w;
BKPT *bk;
Symbol s;
int stack;
char *fname;
char buf[512];
if (cntflg==0)
cntval = -1;
switch (modif) {
case '<':
if (cntval == 0) {
while (readchar() != EOR)
;
reread();
break;
}
if (rdc() == '<')
stack = 1;
else {
stack = 0;
reread();
}
fname = getfname();
redirin(stack, fname);
break;
case '>':
fname = getfname();
redirout(fname);
break;
case 'a':
attachprocess();
break;
case 'k':
kmsys();
break;
case 'q':
case 'Q':
done();
case 'w':
maxpos=(adrflg?adrval:MAXPOS);
break;
case 'S':
printsym();
break;
case 's':
maxoff=(adrflg?adrval:MAXOFF);
break;
case 'm':
printmap("? map", symmap);
printmap("/ map", cormap);
break;
case 0:
case '?':
if (pid)
dprint("pid = %d\n",pid);
else
prints("no process\n");
flushbuf();
case 'r':
case 'R':
printregs(modif);
return;
case 'f':
case 'F':
printfp(cormap, modif);
return;
case 'c':
case 'C':
tracetype = modif;
if (machdata->ctrace) {
if (adrflg) {
/*
* trace from jmpbuf for multi-threaded code.
* assume sp and pc are in adjacent locations
* and mach->szaddr in size.
*/
if (geta(cormap, adrval, &sp) < 0 ||
geta(cormap, adrval+mach->szaddr, &pc) < 0)
error("%r");
} else {
sp = rget(cormap, mach->sp);
pc = rget(cormap, mach->pc);
}
if(mach->link)
link = rget(cormap, mach->link);
else
link = 0;
if (machdata->ctrace(cormap, pc, sp, link, ptrace) <= 0)
error("no stack frame");
}
break;
/*print externals*/
case 'e':
for (i = 0; globalsym(&s, i); i++) {
if (get4(cormap, s.value, &w) > 0)
dprint("%s/%12t%#lux\n", s.name, w);
}
break;
/*print breakpoints*/
case 'b':
case 'B':
for (bk=bkpthead; bk; bk=bk->nxtbkpt)
if (bk->flag) {
symoff(buf, 512, (WORD)bk->loc, CTEXT);
dprint(buf);
if (bk->count != 1)
dprint(",%d", bk->count);
dprint(":%c %S", bk->flag == BKPTTMP ? 'B' : 'b', bk->comm);
}
break;
case 'M':
fname = getfname();
if (machbyname(fname) == 0)
dprint("unknown name\n");;
break;
default:
error("bad `$' command");
}
}
char *
getfname(void)
{
static char fname[ARB];
char *p;
if (rdc() == EOR) {
reread();
return (0);
}
p = fname;
do {
*p++ = lastc;
if (p >= &fname[ARB-1])
error("filename too long");
} while (rdc() != EOR);
*p = 0;
reread();
return (fname);
}
static void
printfp(Map *map, int modif)
{
Reglist *rp;
int i;
int ret;
char buf[512];
for (i = 0, rp = mach->reglist; rp->rname; rp += ret) {
ret = 1;
if (!(rp->rflags&RFLT))
continue;
ret = fpformat(map, rp, buf, sizeof(buf), modif);
if (ret < 0) {
werrstr("Register %s: %r", rp->rname);
error("%r");
}
/* double column print */
if (i&0x01)
dprint("%40t%-8s%-12s\n", rp->rname, buf);
else
dprint("\t%-8s%-12s", rp->rname, buf);
i++;
}
}
void
redirin(int stack, char *file)
{
char *pfile;
if (file == 0) {
iclose(-1, 0);
return;
}
iclose(stack, 0);
if ((infile = open(file, 0)) < 0) {
pfile = smprint("%s/%s", Ipath, file);
infile = open(pfile, 0);
free(pfile);
if(infile < 0) {
infile = STDIN;
error("cannot open");
}
}
}
void
printmap(char *s, Map *map)
{
int i;
if (!map)
return;
if (map == symmap)
dprint("%s%12t`%s'\n", s, fsym < 0 ? "-" : symfil);
else if (map == cormap)
dprint("%s%12t`%s'\n", s, fcor < 0 ? "-" : corfil);
else
dprint("%s\n", s);
for (i = 0; i < map->nsegs; i++) {
if (map->seg[i].inuse)
dprint("%s%8t%-16#llux %-16#llux %-16#llux\n",
map->seg[i].name, map->seg[i].b,
map->seg[i].e, map->seg[i].f);
}
}
/*
* dump the raw symbol table
*/
void
printsym(void)
{
int i;
Sym *sp;
for (i = 0; sp = getsym(i); i++) {
switch(sp->type) {
case 't':
case 'l':
dprint("%16#llux t %s\n", sp->value, sp->name);
break;
case 'T':
case 'L':
dprint("%16#llux T %s\n", sp->value, sp->name);
break;
case 'D':
case 'd':
case 'B':
case 'b':
case 'a':
case 'p':
case 'm':
dprint("%16#llux %c %s\n", sp->value, sp->type, sp->name);
break;
default:
break;
}
}
}
#define STRINGSZ 128
/*
* print the value of dot as file:line
*/
void
printsource(ADDR dot)
{
char str[STRINGSZ];
if (fileline(str, STRINGSZ, dot))
dprint("%s", str);
}
void
printpc(void)
{
char buf[512];
dot = rget(cormap, mach->pc);
if(dot){
printsource((long)dot);
printc(' ');
symoff(buf, sizeof(buf), (long)dot, CTEXT);
dprint("%s/", buf);
if (machdata->das(cormap, dot, 'i', buf, sizeof(buf)) < 0)
error("%r");
dprint("%16t%s\n", buf);
}
}
void
printlocals(Symbol *fn, ADDR fp)
{
int i;
ulong w;
Symbol s;
s = *fn;
for (i = 0; localsym(&s, i); i++) {
if (s.class != CAUTO)
continue;
if (get4(cormap, fp-s.value, &w) > 0)
dprint("%8t%s.%s/%10t%#lux\n", fn->name, s.name, w);
else
dprint("%8t%s.%s/%10t?\n", fn->name, s.name);
}
}
void
printparams(Symbol *fn, ADDR fp)
{
int i;
Symbol s;
ulong w;
int first = 0;
fp += mach->szaddr; /* skip saved pc */
s = *fn;
for (i = 0; localsym(&s, i); i++) {
if (s.class != CPARAM)
continue;
if (first++)
dprint(", ");
if (get4(cormap, fp+s.value, &w) > 0)
dprint("%s=%#lux", s.name, w);
}
}