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Scope: lookup_ID() and install_ID() return IntrusivePtr<ID>

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This fixes several memory leaks and double free bugs.
This commit is contained in:
Max Kellermann 2020-02-26 07:58:06 +01:00
parent cbb6f09726
commit 528cf11a5c
14 changed files with 60 additions and 100 deletions
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8
src/Debug.cc
View file

@ -196,13 +196,12 @@ void get_first_statement(Stmt* list, Stmt*& first, Location& loc)
static void parse_function_name(vector<ParseLocationRec>& result,
ParseLocationRec& plr, const string& s)
{ // function name
ID* id = lookup_ID(s.c_str(), current_module.c_str());
auto id = lookup_ID(s.c_str(), current_module.c_str());
if ( ! id )
{
string fullname = make_full_var_name(current_module.c_str(), s.c_str());
debug_msg("Function %s not defined.\n", fullname.c_str());
plr.type = plrUnknown;
Unref(id);
return;
}
@ -210,7 +209,6 @@ static void parse_function_name(vector<ParseLocationRec>& result,
{
debug_msg("Function %s not declared.\n", id->Name());
plr.type = plrUnknown;
Unref(id);
return;
}
@ -218,7 +216,6 @@ static void parse_function_name(vector<ParseLocationRec>& result,
{
debug_msg("Function %s declared but not defined.\n", id->Name());
plr.type = plrUnknown;
Unref(id);
return;
}
@ -229,12 +226,9 @@ static void parse_function_name(vector<ParseLocationRec>& result,
{
debug_msg("Function %s is a built-in function\n", id->Name());
plr.type = plrUnknown;
Unref(id);
return;
}
Unref(id);
Stmt* body = 0; // the particular body we care about; 0 = all
if ( bodies.size() == 1 )

4
src/EventHandler.cc
View file

@ -38,7 +38,7 @@ FuncType* EventHandler::FType(bool check_export)
if ( type )
return type;
ID* id = lookup_ID(name, current_module.c_str(), false, false,
auto id = lookup_ID(name, current_module.c_str(), false, false,
check_export);
if ( ! id )
@ -48,8 +48,6 @@ FuncType* EventHandler::FType(bool check_export)
return 0;
type = id->Type()->AsFuncType();
Unref(id);
return type;
}

2
src/Expr.cc
View file

@ -4455,7 +4455,7 @@ LambdaExpr::LambdaExpr(std::unique_ptr<function_ingredients> arg_ing,
}
// Install that in the global_scope
ID* id = install_ID(my_name.c_str(), current_module.c_str(), true, false);
auto id = install_ID(my_name.c_str(), current_module.c_str(), true, false);
// Update lamb's name
dummy_func->SetName(my_name.c_str());

3
src/Func.cc
View file

@ -606,7 +606,7 @@ BuiltinFunc::BuiltinFunc(built_in_func arg_func, const char* arg_name,
name = make_full_var_name(GLOBAL_MODULE_NAME, arg_name);
is_pure = arg_is_pure;
ID* id = lookup_ID(Name(), GLOBAL_MODULE_NAME, false);
auto id = lookup_ID(Name(), GLOBAL_MODULE_NAME, false);
if ( ! id )
reporter->InternalError("built-in function %s missing", Name());
if ( id->HasVal() )
@ -614,7 +614,6 @@ BuiltinFunc::BuiltinFunc(built_in_func arg_func, const char* arg_name,
type = id->Type()->Ref();
id->SetVal(new Val(this));
Unref(id);
}
BuiltinFunc::~BuiltinFunc()

8
src/RuleMatcher.cc
View file

@ -9,6 +9,7 @@
#include "RuleCondition.h"
#include "BroString.h"
#include "ID.h"
#include "IntrusivePtr.h"
#include "IntSet.h"
#include "IP.h"
#include "analyzer/Analyzer.h"
@ -1268,17 +1269,14 @@ void RuleMatcher::DumpStateStats(BroFile* f, RuleHdrTest* hdr_test)
static Val* get_bro_val(const char* label)
{
ID* id = lookup_ID(label, GLOBAL_MODULE_NAME, false);
auto id = lookup_ID(label, GLOBAL_MODULE_NAME, false);
if ( ! id )
{
rules_error("unknown script-level identifier", label);
return 0;
}
Val* rval = id->ID_Val();
Unref(id);
return rval;
return id->ID_Val();
}

18
src/Scope.cc
View file

@ -126,7 +126,7 @@ TraversalCode Scope::Traverse(TraversalCallback* cb) const
}
ID* lookup_ID(const char* name, const char* curr_module, bool no_global,
IntrusivePtr<ID> lookup_ID(const char* name, const char* curr_module, bool no_global,
bool same_module_only, bool check_export)
{
string fullname = make_full_var_name(curr_module, name);
@ -144,8 +144,7 @@ ID* lookup_ID(const char* name, const char* curr_module, bool no_global,
reporter->Error("identifier is not exported: %s",
fullname.c_str());
Ref(id);
return id;
return {NewRef{}, id};
}
}
@ -155,16 +154,13 @@ ID* lookup_ID(const char* name, const char* curr_module, bool no_global,
string globalname = make_full_var_name(GLOBAL_MODULE_NAME, name);
ID* id = global_scope()->Lookup(globalname);
if ( id )
{
Ref(id);
return id;
}
return {NewRef{}, id};
}
return 0;
}
ID* install_ID(const char* name, const char* module_name,
IntrusivePtr<ID> install_ID(const char* name, const char* module_name,
bool is_global, bool is_export)
{
if ( scopes.empty() && ! is_global )
@ -182,13 +178,13 @@ ID* install_ID(const char* name, const char* module_name,
string full_name = make_full_var_name(module_name, name);
ID* id = new ID(full_name.data(), scope, is_export);
auto id = make_intrusive<ID>(full_name.data(), scope, is_export);
if ( SCOPE_FUNCTION != scope )
global_scope()->Insert(std::move(full_name), id);
global_scope()->Insert(std::move(full_name), IntrusivePtr{id}.release());
else
{
id->SetOffset(top_scope->Length());
top_scope->Insert(std::move(full_name), id);
top_scope->Insert(std::move(full_name), IntrusivePtr{id}.release());
}
return id;

4
src/Scope.h
View file

@ -88,10 +88,10 @@ extern bool in_debug;
// If no_global is true, don't search in the default "global" namespace.
// This passed ownership of a ref'ed ID to the caller.
extern ID* lookup_ID(const char* name, const char* module,
extern IntrusivePtr<ID> lookup_ID(const char* name, const char* module,
bool no_global = false, bool same_module_only = false,
bool check_export = true);
extern ID* install_ID(const char* name, const char* module_name,
extern IntrusivePtr<ID> install_ID(const char* name, const char* module_name,
bool is_global, bool is_export);
extern void push_scope(ID* id, attr_list* attrs);

2
src/Stmt.cc
View file

@ -199,7 +199,7 @@ static BroFile* print_stdout = 0;
static IntrusivePtr<EnumVal> lookup_enum_val(const char* module_name, const char* name)
{
ID* id = lookup_ID(name, module_name);
auto id = lookup_ID(name, module_name);
assert(id);
assert(id->IsEnumConst());

7
src/Type.cc
View file

@ -1172,7 +1172,7 @@ void EnumType::CheckAndAddName(const string& module_name, const char* name,
return;
}
ID* id = lookup_ID(name, module_name.c_str());
auto id = lookup_ID(name, module_name.c_str());
if ( ! id )
{
@ -1183,7 +1183,7 @@ void EnumType::CheckAndAddName(const string& module_name, const char* name,
if ( deprecation )
id->MakeDeprecated(deprecation);
zeekygen_mgr->Identifier(id);
zeekygen_mgr->Identifier(id.get());
}
else
{
@ -1195,13 +1195,10 @@ void EnumType::CheckAndAddName(const string& module_name, const char* name,
|| (id->HasVal() && val != id->ID_Val()->AsEnum())
|| (names.find(fullname) != names.end() && names[fullname] != val) )
{
Unref(id);
reporter->Error("identifier or enumerator value in enumerated type definition already exists");
SetError();
return;
}
Unref(id);
}
AddNameInternal(module_name, name, val, is_export);

31
src/Var.cc
View file

@ -396,13 +396,11 @@ void begin_func(ID* id, const char* module_name, function_flavor flavor,
for ( int i = 0; i < num_args; ++i )
{
TypeDecl* arg_i = args->FieldDecl(i);
ID* arg_id = lookup_ID(arg_i->id, module_name);
auto arg_id = lookup_ID(arg_i->id, module_name);
if ( arg_id && ! arg_id->IsGlobal() )
arg_id->Error("argument name used twice");
Unref(arg_id);
arg_id = install_ID(arg_i->id, module_name, false, false);
arg_id->SetType(arg_i->type->Ref());
}
@ -509,14 +507,12 @@ void end_func(IntrusivePtr<Stmt> body)
Val* internal_val(const char* name)
{
ID* id = lookup_ID(name, GLOBAL_MODULE_NAME);
auto id = lookup_ID(name, GLOBAL_MODULE_NAME);
if ( ! id )
reporter->InternalError("internal variable %s missing", name);
Val* rval = id->ID_Val();
Unref(id);
return rval;
return id->ID_Val();
}
id_list gather_outer_ids(Scope* scope, Stmt* body)
@ -541,24 +537,20 @@ id_list gather_outer_ids(Scope* scope, Stmt* body)
Val* internal_const_val(const char* name)
{
ID* id = lookup_ID(name, GLOBAL_MODULE_NAME);
auto id = lookup_ID(name, GLOBAL_MODULE_NAME);
if ( ! id )
reporter->InternalError("internal variable %s missing", name);
if ( ! id->IsConst() )
reporter->InternalError("internal variable %s is not constant", name);
Val* rval = id->ID_Val();
Unref(id);
return rval;
return id->ID_Val();
}
Val* opt_internal_val(const char* name)
{
ID* id = lookup_ID(name, GLOBAL_MODULE_NAME);
Val* rval = id ? id->ID_Val() : 0;
Unref(id);
return rval;
auto id = lookup_ID(name, GLOBAL_MODULE_NAME);
return id ? id->ID_Val() : 0;
}
double opt_internal_double(const char* name)
@ -593,12 +585,11 @@ TableVal* opt_internal_table(const char* name)
ListVal* internal_list_val(const char* name)
{
ID* id = lookup_ID(name, GLOBAL_MODULE_NAME);
auto id = lookup_ID(name, GLOBAL_MODULE_NAME);
if ( ! id )
return 0;
Val* v = id->ID_Val();
Unref(id);
if ( v )
{
@ -621,13 +612,11 @@ ListVal* internal_list_val(const char* name)
BroType* internal_type(const char* name)
{
ID* id = lookup_ID(name, GLOBAL_MODULE_NAME);
auto id = lookup_ID(name, GLOBAL_MODULE_NAME);
if ( ! id )
reporter->InternalError("internal type %s missing", name);
BroType* rval = id->Type();
Unref(id);
return rval;
return id->Type();
}
Func* internal_func(const char* name)

2
src/input/Manager.cc
View file

@ -2622,7 +2622,7 @@ Val* Manager::ValueToVal(const Stream* i, const Value* val, bool& have_error) co
string enum_string(val->val.string_val.data, val->val.string_val.length);
// let's try looking it up by global ID.
ID* id = lookup_ID(enum_string.c_str(), GLOBAL_MODULE_NAME);
auto id = lookup_ID(enum_string.c_str(), GLOBAL_MODULE_NAME);
if ( ! id || ! id->IsEnumConst() )
{
Warning(i, "Value '%s' for stream '%s' is not a valid enum.",

51
src/parse.y
View file

@ -666,7 +666,7 @@ expr:
{
set_location(@1);
ID* id = lookup_ID($1, current_module.c_str());
auto id = lookup_ID($1, current_module.c_str());
if ( ! id )
{
if ( ! in_debug )
@ -687,12 +687,14 @@ expr:
}
else
{
if ( id->IsDeprecated() )
reporter->Warning("%s", id->GetDeprecationWarning().c_str());
if ( ! id->Type() )
{
id->Error("undeclared variable");
id->SetType(error_type());
Ref(id);
$$ = new NameExpr(id);
$$ = new NameExpr(id.release());
}
else if ( id->IsEnumConst() )
@ -706,14 +708,8 @@ expr:
}
else
{
Ref(id);
$$ = new NameExpr(id);
$$ = new NameExpr(id.release());
}
if ( id->IsDeprecated() )
reporter->Warning("%s", id->GetDeprecationWarning().c_str());
Unref(id);
}
}
@ -1578,7 +1574,7 @@ event:
{
set_location(@1, @4);
ID* id = lookup_ID($1, current_module.c_str());
auto id = lookup_ID($1, current_module.c_str());
if ( id )
{
if ( ! id->IsGlobal() )
@ -1588,8 +1584,6 @@ event:
}
if ( id->IsDeprecated() )
reporter->Warning("%s", id->GetDeprecationWarning().c_str());
Unref(id);
}
$$ = new EventExpr($1, $3);
@ -1636,13 +1630,13 @@ case_type:
{
const char* name = $4;
IntrusivePtr<BroType> type{AdoptRef{}, $2};
IntrusivePtr<ID> case_var{AdoptRef{}, lookup_ID(name, current_module.c_str())};
auto case_var = lookup_ID(name, current_module.c_str());
if ( case_var && case_var->IsGlobal() )
case_var->Error("already a global identifier");
else
{
case_var = {NewRef{}, install_ID(name, current_module.c_str(), false, false)};
case_var = install_ID(name, current_module.c_str(), false, false);
}
add_local(case_var, std::move(type), INIT_NONE, 0, 0, VAR_REGULAR);
@ -1658,7 +1652,7 @@ for_head:
// body so that we execute these actions - defining
// the local variable - prior to parsing the body,
// which might refer to the variable.
ID* loop_var = lookup_ID($3, current_module.c_str());
auto loop_var = lookup_ID($3, current_module.c_str());
if ( loop_var )
{
@ -1668,13 +1662,12 @@ for_head:
else
{
Unref(loop_var);
loop_var = install_ID($3, current_module.c_str(),
false, false);
}
id_list* loop_vars = new id_list;
loop_vars->push_back(loop_var);
loop_vars->push_back(loop_var.release());
$$ = new ForStmt(loop_vars, $5);
}
@ -1691,8 +1684,8 @@ for_head:
// Check for previous definitions of key and
// value variables.
ID* key_var = lookup_ID($3, module);
ID* val_var = lookup_ID($5, module);
auto key_var = lookup_ID($3, module);
auto val_var = lookup_ID($5, module);
// Validate previous definitions as needed.
if ( key_var )
@ -1712,9 +1705,9 @@ for_head:
val_var = install_ID($5, module, false, false);
id_list* loop_vars = new id_list;
loop_vars->push_back(key_var);
loop_vars->push_back(key_var.release());
$$ = new ForStmt(loop_vars, $7, val_var);
$$ = new ForStmt(loop_vars, $7, val_var.release());
}
|
TOK_FOR '(' '[' local_id_list ']' ',' TOK_ID TOK_IN expr ')'
@ -1723,7 +1716,7 @@ for_head:
const char* module = current_module.c_str();
// Validate value variable
ID* val_var = lookup_ID($7, module);
auto val_var = lookup_ID($7, module);
if ( val_var )
{
@ -1733,7 +1726,7 @@ for_head:
else
val_var = install_ID($7, module, false, false);
$$ = new ForStmt($4, $9, val_var);
$$ = new ForStmt($4, $9, val_var.release());
}
;
@ -1752,7 +1745,7 @@ local_id:
{
set_location(@1);
$$ = lookup_ID($1, current_module.c_str());
$$ = lookup_ID($1, current_module.c_str()).release();
if ( $$ )
{
if ( $$->IsGlobal() )
@ -1763,7 +1756,7 @@ local_id:
else
{
$$ = install_ID($1, current_module.c_str(),
false, is_export);
false, is_export).release();
}
}
;
@ -1788,7 +1781,7 @@ global_or_event_id:
{
set_location(@1);
$$ = lookup_ID($1, current_module.c_str(), false, defining_global_ID);
$$ = lookup_ID($1, current_module.c_str(), false, defining_global_ID).release();
if ( $$ )
{
if ( ! $$->IsGlobal() )
@ -1813,7 +1806,7 @@ global_or_event_id:
current_module.c_str() : 0;
$$ = install_ID($1, module_name,
true, is_export);
true, is_export).release();
}
}
;
@ -1823,7 +1816,7 @@ resolve_id:
TOK_ID
{
set_location(@1);
$$ = lookup_ID($1, current_module.c_str());
$$ = lookup_ID($1, current_module.c_str()).release();
if ( ! $$ )
reporter->Error("identifier not defined: %s", $1);

6
src/plugin/ComponentManager.h
View file

@ -133,9 +133,9 @@ ComponentManager<T, C>::ComponentManager(const string& arg_module, const string&
: module(arg_module),
tag_enum_type(make_intrusive<EnumType>(module + "::" + local_id))
{
::ID* id = install_ID(local_id.c_str(), module.c_str(), true, true);
add_type(id, tag_enum_type, 0);
zeekygen_mgr->Identifier(id);
auto id = install_ID(local_id.c_str(), module.c_str(), true, true);
add_type(id.get(), tag_enum_type, 0);
zeekygen_mgr->Identifier(id.get());
}
template <class T, class C>

12
src/scan.l
View file

@ -775,30 +775,26 @@ void do_atifdef(const char* id)
{
++current_depth;
ID* i;
auto i = lookup_ID(id, current_module.c_str());
if ( ! (i = lookup_ID(id, current_module.c_str())) )
if ( ! i )
{
if_stack.push_back(current_depth);
BEGIN(IGNORE);
}
Unref(i);
}
void do_atifndef(const char *id)
{
++current_depth;
ID* i;
auto i = lookup_ID(id, current_module.c_str());
if ( (i = lookup_ID(id, current_module.c_str())) )
if ( i )
{
if_stack.push_back(current_depth);
BEGIN(IGNORE);
}
Unref(i);
}
void do_atelse()