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645 lines (589 loc) · 12.8 KB
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define set_ts
set $tsrm_ls = $arg0
end
document set_ts
set the ts resource, it is impossible for gdb to
call ts_resource_ex while no process is running,
but we could get the resource from the argument
of frame info.
end
define ____executor_globals
if basic_functions_module.zts
set $tsrm_ls = _tsrm_ls_cache
set $eg = ((zend_executor_globals*) (*((void ***) $tsrm_ls))[executor_globals_id-1])
set $cg = ((zend_compiler_globals*) (*((void ***) $tsrm_ls))[compiler_globals_id-1])
set $eg_ptr = $eg
else
set $eg = executor_globals
set $cg = compiler_globals
set $eg_ptr = (zend_executor_globals*) &executor_globals
end
end
document ____executor_globals
portable way of accessing executor_globals, set $eg
this also sets compiler_globals to $cg
ZTS detection is automatically based on ext/standard module struct
end
define print_cvs
if $argc == 0
____executor_globals
set $cv_ex_ptr = $eg.current_execute_data
else
set $cv_ex_ptr = (zend_execute_data *)$arg0
end
set $cv_count = $cv_ex_ptr.func.op_array.last_var
set $cv = $cv_ex_ptr.func.op_array.vars
set $cv_idx = 0
set $callFrameSize = (sizeof(zend_execute_data) + sizeof(zval) - 1) / sizeof(zval)
printf "Compiled variables count: %d\n\n", $cv_count
while $cv_idx < $cv_count
printf "[%d] '%s'\n", $cv_idx, $cv[$cv_idx].val
set $zvalue = ((zval *) $cv_ex_ptr) + $callFrameSize + $cv_idx
printzv $zvalue
set $cv_idx = $cv_idx + 1
end
end
document print_cvs
Prints the compiled variables and their values.
If a zend_execute_data pointer is set this will print the compiled
variables of that scope. If no parameter is used it will use
current_execute_data for scope.
usage: print_cvs [zend_execute_data *]
end
define dump_bt
set $ex = $arg0
while $ex
printf "[%p] ", $ex
set $func = $ex->func
if $func
if $ex->This->value.obj
if $func->common.scope
printf "%s->", $func->common.scope->name->val
else
printf "%s->", $ex->This->value.obj->ce.name->val
end
else
if $func->common.scope
printf "%s::", $func->common.scope->name->val
end
end
if $func->common.function_name
printf "%s(", $func->common.function_name->val
else
printf "(main"
end
set $callFrameSize = (sizeof(zend_execute_data) + sizeof(zval) - 1) / sizeof(zval)
set $count = $ex->This.u2.num_args
set $arg = 0
while $arg < $count
if $arg > 0
printf ", "
end
set $zvalue = (zval *) $ex + $callFrameSize + $arg
set $type = $zvalue->u1.v.type
if $type == 1
printf "NULL"
end
if $type == 2
printf "false"
end
if $type == 3
printf "true"
end
if $type == 4
printf "%ld", $zvalue->value.lval
end
if $type == 5
printf "%f", $zvalue->value.dval
end
if $type == 6
____print_str $zvalue->value.str->val $zvalue->value.str->len
end
if $type == 7
printf "array(%d)[%p]", $zvalue->value.arr->nNumOfElements, $zvalue
end
if $type == 8
printf "object[%p]", $zvalue
end
if $type == 9
printf "resource(#%d)", $zvalue->value.lval
end
if $type == 10
printf "reference"
end
if $type > 10
printf "unknown type %d", $type
end
set $arg = $arg + 1
end
printf ") "
else
printf "??? "
end
if $func != 0
if $func->type == 2
printf "%s:%d ", $func->op_array.filename->val, $ex->opline->lineno
else
printf "[internal function]"
end
end
set $ex = $ex->prev_execute_data
printf "\n"
end
end
document dump_bt
dumps the current execution stack. usage: dump_bt executor_globals.current_execute_data
end
define printzv
set $ind = 1
____printzv $arg0 0
end
document printzv
prints zval contents
end
define ____printzv_contents
set $zvalue = $arg0
set $type = $zvalue->u1.v.type
# 15 == IS_INDIRECT
if $type > 5 && $type < 12
printf "(refcount=%d) ", $zvalue->value.counted->gc.refcount
end
if $type == 0
printf "UNDEF"
end
if $type == 1
printf "NULL"
end
if $type == 2
printf "bool: false"
end
if $type == 3
printf "bool: true"
end
if $type == 4
printf "long: %ld", $zvalue->value.lval
end
if $type == 5
printf "double: %f", $zvalue->value.dval
end
if $type == 6
printf "string: %s", $zvalue->value.str->val
end
if $type == 7
printf "array: "
if ! $arg1
set $ind = $ind + 1
____print_ht $zvalue->value.arr 1
set $ind = $ind - 1
set $i = $ind
while $i > 0
printf " "
set $i = $i - 1
end
end
set $type = 0
end
if $type == 8
printf "object"
____executor_globals
set $handle = $zvalue->value.obj.handle
set $handlers = $zvalue->value.obj.handlers
set $zobj = $zvalue->value.obj
set $cname = $zobj->ce->name->val
printf "(%s) #%d", $cname, $handle
if ! $arg1
if $handlers->get_properties == &zend_std_get_properties
if $zobj->properties
printf "\nProperties "
set $ht = $zobj->properties
set $ind = $ind + 1
____print_ht $ht 1
set $ind = $ind - 1
set $i = $ind
while $i > 0
printf " "
set $i = $i - 1
end
else
printf " {\n"
set $ht = &$zobj->ce->properties_info
set $k = 0
set $num = $ht->nNumUsed
while $k < $num
set $p = (Bucket*)($ht->arData + $k)
set $name = $p->key
set $prop = (zend_property_info*)$p->val.value.ptr
set $val = (zval*)((char*)$zobj + $prop->offset)
printf "%s => ", $name->val
printzv $val
set $k = $k + 1
end
end
end
end
set $type = 0
end
if $type == 9
printf "resource: #%d", $zvalue->value.res->handle
end
if $type == 10
printf "reference: "
____printzv &$zvalue->value.ref->val $arg1
end
if $type == 11
printf "CONSTANT_AST"
end
if $type == 12
printf "indirect: "
____printzv $zvalue->value.zv $arg1
end
if $type == 13
printf "pointer: %p", $zvalue->value.ptr
end
if $type == 15
printf "_ERROR"
end
if $type == 16
printf "_BOOL"
end
if $type == 17
printf "_NUMBER"
end
if $type > 17
printf "unknown type %d", $type
end
printf "\n"
end
define ____printzv
____executor_globals
set $zvalue = $arg0
printf "[%p] ", $zvalue
set $zcontents = (zval*) $zvalue
if $arg1
____printzv_contents $zcontents $arg1
else
____printzv_contents $zcontents 0
end
end
define print_global_vars
____executor_globals
set $symtable = ((HashTable *)&($eg_ptr->symbol_table))
print_ht $symtable
end
document print_global_vars
Prints the global variables
end
define print_const_table
set $ind = 1
printf "[%p] {\n", $arg0
____print_ht $arg0 4
printf "}\n"
end
document print_const_table
Dumps elements of Constants HashTable
Example: print_const_table executor_globals.zend_constants
end
define ____print_ht
set $ht = (HashTable*)$arg0
set $n = $ind
while $n > 0
printf " "
set $n = $n - 1
end
if $ht->u.v.flags & 4
printf "Packed"
else
printf "Hash"
end
printf "(%d)[%p]: {\n", $ht->nNumOfElements, $ht
set $num = $ht->nNumUsed
set $i = 0
set $ind = $ind + 1
while $i < $num
set $p = (Bucket*)($ht->arData + $i)
set $n = $ind
if $p->val.u1.v.type > 0
while $n > 0
printf " "
set $n = $n - 1
end
printf "[%d] ", $i
if $p->key
____print_str $p->key->val $p->key->len
printf " => "
else
printf "%d => ", $p->h
end
if $arg1 == 0
printf "%p\n", (zval *)&$p->val
end
if $arg1 == 1
set $zval = (zval *)&$p->val
____printzv $zval 1
end
if $arg1 == 2
printf "%s\n", (char*)$p->val.value.ptr
end
if $arg1 == 3
set $func = (zend_function*)$p->val.value.ptr
printf "\"%s\"\n", $func->common.function_name->val
end
if $arg1 == 4
set $const = (zend_constant *)$p->val.value.ptr
____printzv $const 1
end
end
set $i = $i + 1
end
set $ind = $ind - 1
printf "}\n"
end
define print_ht
set $ind = 0
____print_ht $arg0 1
end
document print_ht
dumps elements of HashTable made of zval
end
define print_htptr
set $ind = 0
____print_ht $arg0 0
end
document print_htptr
dumps elements of HashTable made of pointers
end
define print_htstr
set $ind = 0
____print_ht $arg0 2
end
document print_htstr
dumps elements of HashTable made of strings
end
define print_ft
set $ind = 0
____print_ht $arg0 3
end
document print_ft
dumps a function table (HashTable)
end
define ____print_inh_class
set $ce = $arg0
if $ce->ce_flags & 0x10 || $ce->ce_flags & 0x20
printf "abstract "
else
if $ce->ce_flags & 0x40
printf "final "
end
end
printf "class %s", $ce->name->val
if $ce->parent != 0
printf " extends %s", $ce->parent->name->val
end
if $ce->num_interfaces != 0
printf " implements"
set $tmp = 0
while $tmp < $ce->num_interfaces
printf " %s", $ce->interfaces[$tmp]->name->val
set $tmp = $tmp + 1
if $tmp < $ce->num_interfaces
printf ","
end
end
end
set $ce = $ce->parent
end
define ____print_inh_iface
set $ce = $arg0
printf "interface %s", $ce->name->val
if $ce->num_interfaces != 0
set $ce = $ce->interfaces[0]
printf " extends %s", $ce->name->val
else
set $ce = 0
end
end
define print_inh
set $ce = $arg0
set $depth = 0
while $ce != 0
set $tmp = $depth
while $tmp != 0
printf " "
set $tmp = $tmp - 1
end
set $depth = $depth + 1
if $ce->ce_flags & 0x80
____print_inh_iface $ce
else
____print_inh_class $ce
end
printf " {\n"
end
while $depth != 0
set $tmp = $depth
while $tmp != 1
printf " "
set $tmp = $tmp - 1
end
printf "}\n"
set $depth = $depth - 1
end
end
define print_pi
set $pi = (zend_property_info *)$arg0
set $initial_offset = ((uint32_t)(zend_uintptr_t)(&((zend_object*)0)->properties_table[(0)]))
set $ptr_to_val = (zval*)((char*)$pi->ce->default_properties_table + $pi->offset - $initial_offset)
printf "[%p] {\n", $pi
printf " offset = %p\n", $pi->offset
printf " ce = [%p] %s\n", $pi->ce, $pi->ce->name->val
printf " flags = 0x%x (", $pi->flags
if $pi->flags & 0x100
printf "ZEND_ACC_PUBLIC"
else
if $pi->flags & 0x200
printf "ZEND_ACC_PROTECTED"
else
if $pi->flags & 0x400
printf "ZEND_ACC_PRIVATE"
else
if $pi->flags & 0x800
printf "ZEND_ACC_EARLY_BINDING"
else
if $pi->flags & 0x20000
printf "ZEND_ACC_SHADOW"
end
end
end
end
end
printf ")\n"
printf " name = "
print_zstr $pi->name
printf " default value: "
printzv $ptr_to_val
printf "}\n"
end
document print_pi
Takes a pointer to an object's property and prints the property information
usage: print_pi <ptr>
end
define ____print_str
set $tmp = 0
set $str = $arg0
if $argc > 2
set $maxlen = $arg2
else
set $maxlen = 256
end
printf "\""
while $tmp < $arg1 && $tmp < $maxlen
if $str[$tmp] > 31 && $str[$tmp] < 127
printf "%c", $str[$tmp]
else
printf "\\%o", $str[$tmp]
end
set $tmp = $tmp + 1
end
if $tmp != $arg1
printf "..."
end
printf "\""
end
define printzn
____executor_globals
set $ind = 0
set $znode = $arg0
if $znode->op_type == 1
set $optype = "IS_CONST"
end
if $znode->op_type == 2
set $optype = "IS_TMP_VAR"
end
if $znode->op_type == 4
set $optype = "IS_VAR"
end
if $znode->op_type == 8
set $optype = "IS_UNUSED"
end
printf "[%p] %s", $znode, $optype
if $znode->op_type == 1
printf ": "
____printzv &$znode->u.constant 0
end
if $znode->op_type == 2
printf ": "
set $tvar = (union _temp_variable *)((char *)$eg.current_execute_data->Ts + $znode->u.var)
____printzv ((union _temp_variable *)$tvar)->tmp_var 0
end
if $znode->op_type == 4
printf ": "
set $tvar = (union _temp_variable *)((char *)$eg.current_execute_data->Ts + $znode->u.var)
____printzv *$tvar->var.ptr_ptr 0
end
if $znode->op_type == 8
printf "\n"
end
end
document printzn
print type and content of znode.
usage: printzn &opline->op1
end
define printzops
printf "op1 => "
printzn &execute_data->opline.op1
printf "op2 => "
printzn &execute_data->opline.op2
printf "result => "
printzn &execute_data->opline.result
end
document printzops
dump operands of the current opline
end
define print_zstr
set $zstr = (zend_string *)$arg0
if $argc == 2
set $maxlen = $arg1
else
set $maxlen = $zstr->len
end
printf "string(%d) ", $zstr->len
____print_str $zstr->val $zstr->len $maxlen
printf "\n"
end
document print_zstr
print the length and contents of a zend string
usage: print_zstr <ptr> [max length]
end
define zbacktrace
____executor_globals
dump_bt $eg.current_execute_data
end
document zbacktrace
prints backtrace.
This command is almost a short cut for
> (gdb) ____executor_globals
> (gdb) dump_bt $eg.current_execute_data
end
define lookup_root
set $found = 0
if gc_globals->roots
set $current = gc_globals->roots->next
printf "looking ref %p in roots\n", $arg0
while $current != &gc_globals->roots
if $current->ref == $arg0
set $found = $current
break
end
set $current = $current->next
end
if $found != 0
printf "found root %p\n", $found
else
printf "not found\n"
end
end
end
document lookup_root
lookup a refcounted in root
usage: lookup_root [ptr].
end