Viewing file:  dynamic_things.cpp (2.28 KB) -rw-rw-r--
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/*
* phc -- the open source PHP compiler
* See doc/license/README.license for licensing information
*
* Find evals and dynamic includes.
*/
#include "AST_visitor.h"
#include "process_ast/AST_unparser.h"
#include "pass_manager/Plugin_pass.h"
#include "lib/List.h"
#include "process_ir/General.h"
using namespace AST;
using namespace std;
class Dynamic_things : virtual public GC_obj, public Visitor
{
public:
// "Analysis" results
int calls_to_eval;
int calls_to_include;
int calls_to_dynamic_include;
// Used during traversal
bool include_is_dynamic;
Method_invocation* include;
Dynamic_things ()
: calls_to_eval (0)
, calls_to_include (0)
, calls_to_dynamic_include (0)
, include_is_dynamic (false)
, include (NULL)
{
}
void pre_method_invocation (Method_invocation *in)
{
// Includes and evals are never like this
if (in->target || not isa<METHOD_NAME> (in->method_name))
return;
// This isnt very likely, but we dont want to break things.
if (include)
return;
String* name = dyc<METHOD_NAME> (in->method_name)->value;
if (*name == "eval")
{
calls_to_eval++;
}
else if (*name == "include"
|| *name == "include_once"
|| *name == "require"
|| *name == "require_once")
{
calls_to_include++;
include_is_dynamic = false; // check in the post_method_invocation
include = in;
}
}
void pre_expr (Expr* in)
{
if (not include)
return;
/*
* What constitutes dynamic?
*/
if (not (
isa<Constant> (in) || isa<Literal> (in) // these are OK
|| isa<Bin_op> (in) || isa<Unary_op> (in) || isa<Cast> (in))) // lets see the subexprs
{
include_is_dynamic = true;
}
}
void post_method_invocation (Method_invocation *in)
{
if (include == in)
{
if (include_is_dynamic)
{
calls_to_dynamic_include++;
include_is_dynamic = false;
}
include = NULL;
}
}
void post_php_script (PHP_script* in)
{
cout
<< *in->get_filename () << ":"
<< calls_to_eval << ","
<< calls_to_include << ","
<< calls_to_dynamic_include
<< endl;
// Dont care anymore.
exit (0);
}
};
extern "C" void load (Pass_manager* pm, Plugin_pass* pass)
{
pm->add_after_named_pass (pass, s("incl1"));
}
extern "C" void run_ast (PHP_script* in, Pass_manager* pm, String* option)
{
in->visit (new Dynamic_things ());
}
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