ref: 61f4c085c402af665b436f6d010d61107551d8a3
dir: /sys/src/9/port/dtracydev.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include <dtracy.h>
enum{
Dwalk,
Dstat,
Dopen,
Dcreate,
Dclose,
Dread,
Dbread,
Dwrite,
Dbwrite,
Dremove,
Dwstat,
Dend
};
static char *optab[] = {
[Dwalk] "walk",
[Dstat] "stat",
[Dopen] "open",
[Dcreate] "create",
[Dclose] "close",
[Dread] "read",
[Dbread] "bread",
[Dwrite] "write",
[Dbwrite] "bwrite",
[Dremove] "remove",
[Dwstat] "wstat",
};
struct {
DTProbe *in[Dend];
DTProbe *out[Dend];
Dev clean;
} ledger[256];
static Walkqid*
wrapwalk(Chan *c, Chan *nc, char **names, int nname)
{
DTTrigInfo info;
Walkqid *wq;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)nc;
info.arg[2] = (uvlong)names;
info.arg[3] = (uvlong)nname;
dtptrigger(ledger[c->type].in[Dwalk], &info);
wq = ledger[c->type].clean.walk(c, nc, names, nname);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)wq;
dtptrigger(ledger[c->type].out[Dwalk], &info);
return wq;
}
static int
wrapstat(Chan *c, uchar *b, int n)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)b;
info.arg[2] = (uvlong)n;
dtptrigger(ledger[c->type].in[Dstat], &info);
n = ledger[c->type].clean.stat(c, b, n);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)n;
dtptrigger(ledger[c->type].out[Dstat], &info);
return n;
}
static Chan*
wrapopen(Chan *c, int mode)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)mode;
dtptrigger(ledger[c->type].in[Dopen], &info);
c = ledger[c->type].clean.open(c, mode);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)c;
dtptrigger(ledger[c->type].out[Dopen], &info);
return c;
}
static Chan*
wrapcreate(Chan *c, char *name, int mode, ulong perm)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)name;
info.arg[2] = (uvlong)mode;
info.arg[3] = (uvlong)perm;
dtptrigger(ledger[c->type].in[Dcreate], &info);
c = ledger[c->type].clean.create(c, name, mode, perm);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)c;
dtptrigger(ledger[c->type].out[Dcreate], &info);
return c;
}
static void
wrapclose(Chan *c)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
dtptrigger(ledger[c->type].in[Dclose], &info);
ledger[c->type].clean.close(c);
memset(&info, 0, sizeof info);
dtptrigger(ledger[c->type].out[Dclose], &info);
}
static long
wrapread(Chan *c, void *b, long n, vlong off)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)b;
info.arg[2] = (uvlong)n;
info.arg[3] = (uvlong)off;
dtptrigger(ledger[c->type].in[Dread], &info);
n = ledger[c->type].clean.read(c, b, n, off);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)n;
dtptrigger(ledger[c->type].out[Dread], &info);
return n;
}
static Block*
wrapbread(Chan *c, long n, ulong off)
{
Block *b;
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)n;
info.arg[2] = (uvlong)off;
dtptrigger(ledger[c->type].in[Dbread], &info);
b = ledger[c->type].clean.bread(c, n, off);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)b;
dtptrigger(ledger[c->type].out[Dbread], &info);
return b;
}
static long
wrapwrite(Chan *c, void *b, long n, vlong off)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)b;
info.arg[2] = (uvlong)n;
info.arg[3] = (uvlong)off;
dtptrigger(ledger[c->type].in[Dwrite], &info);
n = ledger[c->type].clean.write(c, b, n, off);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)n;
dtptrigger(ledger[c->type].out[Dwrite], &info);
return n;
}
static long
wrapbwrite(Chan *c, Block *b, ulong off)
{
long n;
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)b;
info.arg[2] = (uvlong)off;
dtptrigger(ledger[c->type].in[Dbwrite], &info);
n = ledger[c->type].clean.bwrite(c, b, off);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)n;
dtptrigger(ledger[c->type].out[Dbwrite], &info);
return n;
}
void
wrapremove(Chan *c)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
dtptrigger(ledger[c->type].in[Dremove], &info);
ledger[c->type].clean.remove(c);
memset(&info, 0, sizeof info);
dtptrigger(ledger[c->type].out[Dremove], &info);
}
int
wrapwstat(Chan *c, uchar *b, int n)
{
DTTrigInfo info;
memset(&info, 0, sizeof info);
info.arg[0] = (uvlong)c;
info.arg[1] = (uvlong)b;
info.arg[2] = (uvlong)n;
dtptrigger(ledger[c->type].in[Dwstat], &info);
n = ledger[c->type].clean.wstat(c, b, n);
memset(&info, 0, sizeof info);
info.arg[9] = (uvlong)n;
dtptrigger(ledger[c->type].out[Dwstat], &info);
return n;
}
static void
devprovide(DTProvider *prov)
{
uint i, j;
uint path;
char pname[32];
char buf[32];
for(i = 0; devtab[i] != nil; i++){
memmove(&ledger[i].clean, devtab[i], sizeof(Dev));
for(j = 0; j < Dend; j++){
path = (i<<16) | j;
snprint(buf, sizeof buf, "dev:%s:%s", devtab[i]->name, optab[j]);
snprint(pname, sizeof pname, "%s:entry", buf);
ledger[i].in[j] = dtpnew(pname, prov, (void *) path);
snprint(pname, sizeof pname, "%s:return", buf);
ledger[i].out[j] = dtpnew(pname, prov, (void *) path);
}
}
}
static int
devenable(DTProbe *p)
{
uint i, j;
uint path;
Dev *d;
path = (uint)(uintptr)p->aux;
i = path>>16;
j = path & ((1<<16)-1);
assert(i < 256);
assert(j < Dend);
d = devtab[i];
switch(j){
case Dwalk:
d->walk = wrapwalk;
break;
case Dstat:
d->stat = wrapstat;
break;
case Dopen:
d->open = wrapopen;
break;
case Dcreate:
d->create = wrapcreate;
break;
case Dclose:
d->close = wrapclose;
break;
case Dread:
d->read = wrapread;
break;
case Dbread:
d->bread = wrapbread;
break;
case Dwrite:
d->write = wrapwrite;
break;
case Dbwrite:
d->bwrite = wrapbwrite;
break;
case Dremove:
d->remove = wrapremove;
break;
case Dwstat:
d->wstat = wrapwstat;
break;
}
return 0;
}
static void
devdisable(DTProbe *p)
{
uint i, j;
uint path;
Dev *d, *clean;
path = (uint)(uintptr)p->aux;
i = path>>16;
j = path & ((1<<16)-1);
assert(i < 256);
assert(j < Dend);
d = devtab[i];
clean = &ledger[i].clean;
switch(j){
case Dwalk:
d->walk = clean->walk;
break;
case Dstat:
d->stat = clean->stat;
break;
case Dopen:
d->open = clean->open;
break;
case Dcreate:
d->create = clean->create;
break;
case Dclose:
d->close = clean->close;
break;
case Dread:
d->read = clean->read;
break;
case Dbread:
d->bread = clean->bread;
break;
case Dwrite:
d->write = clean->write;
break;
case Dbwrite:
d->bwrite = clean->bwrite;
break;
case Dremove:
d->remove = clean->remove;
break;
case Dwstat:
d->wstat = clean->wstat;
break;
}
}
DTProvider dtracydevprov = {
.name = "dev",
.provide = devprovide,
.enable = devenable,
.disable = devdisable,
};