blob: d49c4ea1338dee9109a5733ebef99c1e05e52fd9 [file] [log] [blame]
include("/sys/src/libc/port/pool.acid");
aggr Byte {
'b' 0 byte;
};
defn
byteat(addr)
{
local x;
complex Byte addr;
x = addr.byte;
return x\d;
}
defn
B2T(addr) {
complex Bhdr addr;
addr = addr+addr.size-sizeofBtail;
complex Btail addr;
return addr;
}
defn
B2D(addr) {
local x;
x = addr+sizeofBhdr;
return x\X;
}
defn
D2B(addr) {
local x;
x = addr-sizeofBhdr;
complex Bhdr x;
return x;
}
defn
B2NB(addr) {
complex Bhdr addr;
addr = addr+addr.size;
complex Bhdr addr;
return addr;
}
defn
A2TB(addr) {
local b;
complex Arena addr;
b = addr+addr.asize-sizeofBhdr;
complex Bhdr b;
return b;
}
defn
A2B(addr) {
return B2NB(addr);
}
defn
B2PT(addr) {
complex Bhdr addr;
addr = addr-sizeofBtail;
complex Btail addr;
return addr;
}
defn
SHORT(addr) {
local hi, lo;
hi = byteat(addr);
lo = byteat(addr+1);
return lo+hi*256;
}
defn
Btail(addr) {
complex Btail addr;
print(" magic0 ", addr.magic0, "\n");
print(" datadiff ", SHORT(addr.datasize), "\n");
print(" magic1 ", addr.magic1, "\n");
print(" size ", addr.size\X, "\n");
print(" hdr ", addr+sizeofBtail-addr.size\X, "\n");
};
defn
Tail(addr)
{
print(" ", B2T(addr)\X, "\n");
Btail(B2T(addr));
}
defn
Magic(m)
{
if m == FREE_MAGIC then
return "free";
if m == ARENA_MAGIC then
return "arena";
if m == UNKEMPT_MAGIC then
return "unkempt";
if m == KEMPT_MAGIC then
return "kempt";
if m == ARENATAIL_MAGIC then
return "arenatail";
if m == DEAD_MAGIC then
return "dead";
return "unknown magic";
}
defn
Block(addr)
{
complex Bhdr addr;
print(" ", Magic(addr.magic), "\n");
print(" data ", B2D(addr), "\n");
print(" datasize ", getdsize(addr), "\n");
Bhdr(addr);
Tail(addr);
}
defn
getdsize(addr)
{
complex Bhdr addr;
local x;
x = addr.size\d;
x = x-SHORT(B2T(addr).datasize);
return x\d;
}
defn
datamagic(x)
{
x = x%4;
if x == 0 then return 0xFE;
if x == 1 then return 0xF1;
if x == 2 then return 0xF0;
if x == 3 then return 0xFA;
}
defn
checkblock(addr)
{
local badmagic, datamagic, a, b, t, q, n, dsize, taddr, checked;
complex Bhdr addr;
taddr = B2T(addr);
complex Btail taddr;
if addr.magic == FREE_MAGIC || addr.magic == UNKEMPT_MAGIC then {
if taddr.magic0 != TAIL_MAGIC0 || taddr.magic1 != TAIL_MAGIC1 then
print(addr\X, " corrupt tail magic\n");
if taddr.size != addr.size then
print(addr\X, " corrupt tail header pointer\n");
}
if addr.magic == ARENA_MAGIC then {
taddr = A2TB(addr);
if taddr.magic != ARENATAIL_MAGIC then
print(addr\X, " arena with bad tail block\n");
else
addr = taddr;
}
if addr.magic == ARENATAIL_MAGIC then {
if addr.size != 0 then
print(addr\X, " bad size in arena tail\n");
}
if addr.magic == KEMPT_MAGIC then {
a = addr;
complex Alloc a;
if a.size > 1024*1024*1024 then
print(addr\X, " block ridiculously large\n");
t = B2T(addr);
if t.magic0 != TAIL_MAGIC0 || t.magic1 != TAIL_MAGIC1 then
print(addr\X, " bad tail magic\n");
if t.size != addr.size then
print(addr\X, " bad tail pointer\n");
dsize = getdsize(a);
if dsize > a.size then
print(addr\X, " too much data in block\n");
q = B2D(a)\X+dsize;
n = 4;
if q+4 > t then
n = t-q;
badmagic = 0;
loop 0,n-1 do {
if byteat(q) != datamagic(q) then {
badmagic=1;
}
q = q+1;
}
if badmagic then
print(addr\X, " size ", dsize, " user has overwritten boundary\n");
}
}
defn
checkarena(arena)
{
local atail, b;
atail = A2TB(arena);
complex Bhdr arena;
b = arena;
while b.magic != ARENATAIL_MAGIC && b < atail do {
checkblock(b);
if B2NB(b) == b then {
print("B2NB(", b\X, ") = b\n");
b = atail; // end loop
}
b = B2NB(b);
}
checkblock(b);
if b != atail then
print("found wrong tail to arena ", arena\X, "\n");
}
defn
checkpool(p)
{
complex Pool p;
local a;
a = p.arenalist;
while a != 0 do {
complex Arena a;
checkarena(a);
a = a.down;
}
}
defn
gendumptree(f, in, s)
{
complex Free f;
loop 1,in do {print(" ");}
print(s, " size ", f.size\D, " left ", f.left\X, " right ", f.right\X, "\n");
if f.left != 0 && f.left < 0x7FFFFFFF then
gendumptree(f.left, in+1, "l");
if f.right != 0 && f.right < 0x7FFFFFFF then
gendumptree(f.right, in+1, "r");
}
defn
dumptree(f)
{
gendumptree(f, 0, "*");
}
defn
poolwhopointsat(p, addr)
{
complex Pool p;
local a;
a = p.arenalist;
while a != 0 do {
complex Arena a;
arenawhopointsat(a, addr);
a = a.down;
}
}
defn
arenawhopointsat(arena, addr)
{
local atail, b;
atail = A2TB(arena);
complex Bhdr arena;
b = arena;
while b < atail do {
if *b == addr then
print(b\X, "\n");
b = b+4;
}
}
defn
whopointsat(addr)
{
poolwhopointsat(*mainmem, addr);
}
defn
blockhdr(addr)
{
addr = addr & ~3;
while *addr != FREE_MAGIC
&& *addr != ARENA_MAGIC
&& *addr != UNKEMPT_MAGIC
&& *addr != KEMPT_MAGIC
&& *addr != ARENATAIL_MAGIC
do
addr = addr-4;
return addr;
}