X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=src%2Fcontext.c;h=f580f7f424bb70a8fd3d9fcd0a9ee9900539a55c;hp=c4316187b6872c5a2f43eaaaae82a772cceafc43;hb=574519ef5e3ab76f00253fad870afce7135638d1;hpb=f5f2fc955a23e5b103b1ce869f31ffe584d67eb9

diff --git a/src/context.c b/src/context.c
index c431618..f580f7f 100644
--- a/src/context.c
+++ b/src/context.c
@@ -1,72 +1,213 @@
-#include <sys/param.h>
-#include <dlfcn.h>
-#include <dirent.h>
-#include <fnmatch.h>
-#include <errno.h>
-
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
 
+#include "php.h"
+
+#include <stdio.h>
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif
+#ifdef HAVE_STRING_H
+# if !defined STDC_HEADERS && defined HAVE_MEMORY_H
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_ERRNO_H
+# include <errno.h>
+#endif
+#ifdef HAVE_GLOB_H
+# include <glob.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+# include <arpa/nameser.h>
+#endif
+#ifdef HAVE_NETDB_H
+# include <netdb.h>
+#endif
+#ifdef HAVE_RESOLV_H
+# include <resolv.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_TIMES_H
+# include <sys/times.h>
+#endif
+#ifdef HAVE_SYS_UIO_H
+# include <sys/uio.h>
+#endif
+#ifdef HAVE_SYS_UTSNAME_H
+# include <sys/utsname.h>
+#endif
+#ifdef HAVE_TIME_H
+# include <time.h>
+#endif
+#ifdef HAVE_WCHAR_H
+# include <wchar.h>
+#endif
+
+#ifdef HAVE_DIRENT_H
+# include <dirent.h>
+# define NAMLEN(dirent) strlen ((dirent)->d_name)
+#else
+# define dirent direct
+# define NAMLEN(dirent) ((dirent)->d_namlen)
+# ifdef HAVE_SYS_NDIR_H
+#  include <sys/ndir.h>
+# endif
+# ifdef HAVE_SYS_DIR_H
+#  include <sys/dir.h>
+# endif
+# ifdef HAVE_NDIR_H
+#  include <ndir.h>
+# endif
+#endif
+
+#include <sys/param.h>
+#include <dlfcn.h>
+#include <fnmatch.h>
+
 #include "php.h"
 #include "php_scandir.h"
 #include "php_psi.h"
-#include "context.h"
-#include "parser.h"
 
-#define psi_predef_count(of) ((sizeof(psi_predef ##of## s)/sizeof(psi_predef ##of))-1)
-typedef struct psi_predef_type {
+#include "libjit.h"
+#include "libffi.h"
+
+static struct psi_std_type {
+	token_t type_tag;
+	const char *type_name;
+} psi_std_types[] = {
+	{PSI_T_FLOAT, "float"},
+	{PSI_T_DOUBLE, "double"},
+	{PSI_T_INT8, "int8_t"},
+	{PSI_T_INT16, "int16_t"},
+	{PSI_T_INT32, "int32_t"},
+	{PSI_T_INT64, "int64_t"},
+	{PSI_T_UINT8, "uint8_t"},
+	{PSI_T_UINT16, "uint16_t"},
+	{PSI_T_UINT32, "uint32_t"},
+	{PSI_T_UINT64, "uint64_t"},
+	{0}
+};
+
+static struct psi_predef_type {
 	token_t type_tag;
 	const char *type_name;
 	const char *alias;
-} psi_predef_type;
-static const psi_predef_type psi_predef_types[] = {
-	PHP_PSI_TYPES{0}
+} psi_predef_types[] = {
+	PSI_TYPES
+	{0}
 };
-#define psi_predef_type_count() psi_predef_count(_type)
 
-typedef struct psi_predef_const {
+static struct psi_predef_const {
 	token_t type_tag;
 	const char *type_name;
-	const char *name;
+	const char *var_name;
 	const char *val_text;
 	token_t val_type_tag;
-} psi_predef_const;
-static const psi_predef_const psi_predef_consts[] = {
-	PHP_PSI_CONSTS{0}
+} psi_predef_consts[] = {
+	PSI_CONSTS
+	{0}
 };
-#define psi_predef_const_count() psi_predef_count(_const)
 
-typedef struct psi_predef_struct_member {
+PSI_MACROS
+
+int psi_glob(const char *pattern, int flags,
+               int (*errfunc) (const char *epath, int eerrno),
+               glob_t *pglob) {
+	size_t offs = flags & GLOB_DOOFFS ? pglob->gl_offs : 0;
+	int rv = glob(pattern, flags, errfunc, pglob);
+	if (pglob->gl_pathv) {
+		while (offs--) {
+			pglob->gl_pathv[offs] = NULL;
+		}
+	}
+	return rv;
+}
+
+int psi_printf(const char *fmt, ...) {
+	int rs;
+	char *a1;
+	va_list ap1, ap2;
+
+	va_start(ap1, fmt);
+	va_copy(ap2, ap1);
+	a1 = va_arg(ap2, char *);
+	rs = vprintf(fmt, ap1);
+	va_end(ap1);
+	va_end(ap2);
+	return rs;
+}
+
+static struct psi_func_redir {
+	const char *name;
+	void (*func)(void);
+} psi_func_redirs[] = {
+	{"glob", (void (*)(void)) psi_glob},
+	{"printf", (void (*)(void)) psi_printf},
+	PSI_REDIRS
+	{0}
+};
+
+static struct psi_predef_decl {
 	token_t type_tag;
 	const char *type_name;
-	const char *name;
-	size_t off;
-	size_t len;
+	const char *var_name;
 	size_t pointer_level;
 	size_t array_size;
-} psi_predef_struct_member;
-#define PSI_PREDEF_STRUCT_MEMBERS 32
-typedef struct psi_predef_struct {
-	const char *name;
-	size_t size;
-	psi_predef_struct_member members[PSI_PREDEF_STRUCT_MEMBERS];
-} psi_predef_struct;
-static const psi_predef_struct psi_predef_structs[] = {
-	PHP_PSI_STRUCTS{0}
+} psi_predef_decls[] = {
+	PSI_DECLS
+	{0}
 };
-#define psi_predef_struct_count() psi_predef_count(_struct)
 
-PHP_PSI_MACROS
-
-typedef struct psi_predef_func {
-	const char *name;
-	void (*func)(void);
-} psi_predef_func;
-static psi_predef_func psi_predef_funcs[] = {
-	PHP_PSI_FUNCS{0}
+static struct psi_predef_struct {
+	token_t type_tag;
+	const char *type_name;
+	const char *var_name;
+	size_t offset;
+	size_t size;
+	size_t pointer_level;
+	size_t array_size;
+} psi_predef_structs[] = {
+	PSI_STRUCTS
+	{0}
 };
-#define psi_predef_func_count() psi_predef_count(_func)
 
 static int validate_lib(PSI_Data *data, void **dlopened) {
 	char lib[MAXPATHLEN];
@@ -94,16 +235,26 @@ static int validate_lib(PSI_Data *data, void **dlopened) {
 
 static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
 	size_t i;
+	struct psi_std_type *stdtyp;
 
 	if (type->real) {
 		return 1;
 	}
 	for (i = 0; i < defs->count; ++i) {
-		if (!strcmp(defs->list[i]->alias, type->name)) {
-			type->real = defs->list[i]->type;
+		decl_typedef *def = defs->list[i];
+
+		if (def->type->type != type->type && !strcmp(def->alias, type->name)) {
+			type->real = def->type;
+			return 1;
+		}
+	}
+	for (stdtyp = &psi_std_types[0]; stdtyp->type_tag; ++stdtyp) {
+		if (!strcmp(type->name, stdtyp->type_name)) {
+			type->type = stdtyp->type_tag;
 			return 1;
 		}
 	}
+
 	return 0;
 }
 static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type) {
@@ -127,7 +278,10 @@ static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
 		if (!data->defs || !locate_decl_type_alias(data->defs, type)) {
 			return 0;
 		}
-		return validate_decl_type(data, type->real);
+		if (type->real) {
+			return validate_decl_type(data, type->real);
+		}
+		return 1;
 	case PSI_T_STRUCT:
 		if (!data->structs || !locate_decl_type_struct(data->structs, type)) {
 			return 0;
@@ -138,8 +292,8 @@ static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
 }
 static inline int validate_decl_typedef(PSI_Data *data, decl_typedef *def) {
 	if (!validate_decl_type(data, def->type)) {
-		data->error(PSI_WARNING, "Type '%s' cannot be aliased to '%s'",
-			def->type->name, def->alias);
+		data->error(PSI_WARNING, "Type '%s' cannot be aliased to %s'%s'",
+			def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",def->alias);
 		return 0;
 	}
 	/* FIXME: check def->alias */
@@ -153,8 +307,10 @@ static inline int validate_constant(PSI_Data *data, constant *c) {
 
 static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
 	if (!validate_decl_type(data, arg->type)) {
-		data->error(PSI_WARNING, "Cannot use '%s' as type for '%s'",
-			arg->type->name, arg->var->name);
+		data->error(PSI_WARNING, "Cannot use '%s'(%d) as type for decl var '%s'"
+				" in %s on line %zu at col %zu",
+			arg->type->name, arg->type->type, arg->var->name,
+			arg->type->token->file, arg->type->token->line, arg->type->token->col);
 		return 0;
 	}
 	return 1;
@@ -224,6 +380,8 @@ static inline int validate_decl_abi(PSI_Data *data, decl_abi *abi) {
 }
 static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_arg *func)
 {
+	struct psi_func_redir *redir;
+
 	if (!strcmp(func->var->name, "dlsym")) {
 		data->error(PSI_WARNING, "Cannot dlsym dlsym (sic!)");
 		return 0;
@@ -232,22 +390,17 @@ static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_
 	if (!validate_decl_arg(data, func)) {
 		return 0;
 	}
+	for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
+		if (!strcmp(func->var->name, redir->name)) {
+			decl->call.sym = redir->func;
+		}
+	}
+	if (!decl->call.sym) {
 #ifndef RTLD_NEXT
 # define RTLD_NEXT ((void *) -1l)
 #endif
-	decl->dlptr = dlsym(dl ?: RTLD_NEXT, func->var->name);
-	if (!decl->dlptr) {
-		size_t i;
-
-		for (i = 0; i < psi_predef_func_count(); ++i) {
-			psi_predef_func *pre = &psi_predef_funcs[i];
-
-			if (!strcmp(func->var->name, pre->name)) {
-				decl->dlptr = pre->func;
-				break;
-			}
-		}
-		if (!decl->dlptr) {
+		decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
+		if (!decl->call.sym) {
 			data->error(PSI_WARNING, "Failed to locate symbol '%s': %s",
 				func->var->name, dlerror());
 		}
@@ -273,26 +426,87 @@ static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
 	}
 	return 1;
 }
-
-static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
+static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
 	size_t i;
 
-	ZEND_ASSERT(s);
-	for (i = 0; i < s->args->count; ++i) {
-		decl_arg *darg = s->args->args[i];
+	for (i = 0; i < args->count; ++i) {
+		decl_arg *arg = args->args[i];
 
-		if (!strcmp(var->name, darg->var->name)) {
-			return var->arg = darg;
+		if (!strcmp(var->name, arg->var->name)) {
+			ZEND_ASSERT(!var->arg || var->arg == arg);
+			return var->arg = arg;
 		}
 	}
+	if (func && !strcmp(var->name, func->var->name)) {
+		return var->arg = func;
+	}
+
+	return NULL;
+}
+static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
+	if (s->args) {
+		return locate_decl_var_arg(var, s->args, NULL);
+	}
 
 	return NULL;
 }
-static inline int validate_set_value(PSI_Data *data, set_value *set, decl_arg *ref) {
+static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
 	size_t i;
-	decl_type *ref_type = real_decl_type(ref->type);
-	decl_var *set_var = set->vars->vars[0];
 
+	for (i = 0; i < consts->count; ++i) {
+		constant *cnst = consts->list[i];
+
+		if (!strcmp(cnst->name, exp->u.numb)) {
+			free(exp->u.numb);
+			return exp->u.cnst = cnst;
+		}
+	}
+
+	return NULL;
+}
+static inline int validate_num_exp(PSI_Data *data, decl_args *dargs, decl_arg *func, num_exp *exp) {
+	if (exp->operand) {
+		switch (exp->operator) {
+		case PSI_T_PLUS:
+			exp->calculator = psi_calc_add;
+			break;
+		case PSI_T_MINUS:
+			exp->calculator = psi_calc_sub;
+			break;
+		case PSI_T_ASTERISK:
+			exp->calculator = psi_calc_mul;
+			break;
+		case PSI_T_SLASH:
+			exp->calculator = psi_calc_div;
+			break;
+		EMPTY_SWITCH_DEFAULT_CASE();
+		}
+		if (!validate_num_exp(data, dargs, func, exp->operand)) {
+			return 0;
+		}
+	}
+	switch (exp->t) {
+	case PSI_T_NAME:
+		if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
+			data->error(PSI_WARNING, "Unknown variable '%s' in numeric expression",
+					exp->u.dvar->name);
+			return 0;
+		}
+		return 1;
+	case PSI_T_NSNAME:
+		if (!locate_num_exp_constant(exp, data->consts)) {
+			data->error(PSI_WARNING, "Unknown constant '%s' in numeric expression",
+					exp->u.numb);
+			return 0;
+		}
+		return 1;
+	case PSI_T_NUMBER:
+		return 1;
+	default:
+		return 0;
+	}
+}
+static inline int validate_set_value_handler(set_value *set) {
 	switch (set->func->type) {
 	case PSI_T_TO_BOOL:
 		set->func->handler = psi_to_bool;
@@ -309,39 +523,131 @@ static inline int validate_set_value(PSI_Data *data, set_value *set, decl_arg *r
 	case PSI_T_TO_ARRAY:
 		set->func->handler = psi_to_array;
 		break;
-	EMPTY_SWITCH_DEFAULT_CASE();
+	case PSI_T_TO_OBJECT:
+		set->func->handler = psi_to_object;
+		break;
+	case PSI_T_VOID:
+		set->func->handler = psi_to_void;
+		break;
+	default:
+		return 0;
 	}
+	return 1;
+}
+static inline void decl_var_arg_v(decl_args *args, va_list argp) {
+	int argc;
+	decl_arg **argv;
 
-	if (strcmp(set_var->name, ref->var->name)) {
-		return 0;
+	memset(args, 0, sizeof(*args));
+
+	while ((argc = va_arg(argp, int))) {
+		argv = va_arg(argp, decl_arg **);
+		while (argc--) {
+			add_decl_arg(args, *argv++);
+		}
 	}
+}
+static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
+	size_t i;
+	decl_type *ref_type;
+	decl_var *set_var = set->vars->vars[0];
 
-	if (set->count && (set->func->type != PSI_T_TO_ARRAY || ref_type->type != PSI_T_STRUCT)) {
-		data->error(E_WARNING, "Inner `set` statement casts only work with to_array() casts on structs");
+	if (!validate_set_value_handler(set)) {
+		data->error(PSI_WARNING, "Invalid cast '%s'", set->func->name);
 		return 0;
 	}
-	for (i = 0; i < set->count; ++i) {
-		decl_var *sub_var = set->inner[i]->vars->vars[0];
-		decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
 
+	for (i = 0; i < set->vars->count; ++i) {
+		decl_var *svar = set->vars->vars[i];
+		if (!svar->arg && !locate_decl_var_arg(svar, ref_list, NULL)) {
+			data->error(PSI_WARNING, "Unknown variable '%s'", svar->name);
+			return 0;
+		}
+	}
+
+	if (!ref) {
+		ref = set_var->arg;
+	}
+	ref_type = real_decl_type(ref->type);
+
+	if (set->count) {
+		int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
+		int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
+
+		if (!is_to_array && !is_pointer_to_struct) {
+			data->error(E_WARNING, "Inner `set` statement casts only work with "
+					"to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
+			return 0;
+		}
+	}
+	if (set->num) {
+		if (!validate_num_exp(data, ref_list, ref, set->num)) {
+			return 0;
+		}
+	}
+
+	if (ref_type->type == PSI_T_STRUCT) {
+		/* to_array(struct, to_...) */
+		for (i = 0; i < set->count; ++i) {
+			decl_var *sub_var = set->inner[i]->vars->vars[0];
+			decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
+
+			set->inner[i]->outer.set = set;
+			if (sub_ref) {
+				if (!validate_set_value_ex(data, set->inner[i], sub_ref, ref_type->strct->args)) {
+					return 0;
+				}
+			}
+		}
+	} else if (set->count == 1) {
+		/* to_array(ptr, to_string(*ptr)) */
+		decl_var *sub_var = set->inner[0]->vars->vars[0];
+		decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list, ref);
+
+		set->inner[0]->outer.set = set;
 		if (sub_ref) {
-			if (!validate_set_value(data, set->inner[i], sub_ref)) {
+			if (strcmp(sub_var->name, set_var->name)) {
+				data->error(E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
+				return 0;
+			}
+			if (!validate_set_value_ex(data, set->inner[0], sub_ref, ref_list)) {
 				return 0;
 			}
 		}
+	} else if (set->count > 1) {
+		data->error(E_WARNING, "Inner `set` statement casts on pointers may only occur once");
+		return 0;
 	}
 
 	return 1;
 }
+static inline int validate_set_value(PSI_Data *data, set_value *set, ...) {
+	va_list argp;
+	decl_args args = {0};
+	int check;
+
+	va_start(argp, set);
+	decl_var_arg_v(&args, argp);
+	va_end(argp);
+
+	check = validate_set_value_ex(data, set, NULL, &args);
+	if (args.args) {
+		free(args.args);
+	}
+	return check;
+}
 static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
-	size_t i;
+	if (decls) {
+		size_t i;
 
-	for (i = 0; i < decls->count; ++i) {
-		if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
-			ret->decl = decls->list[i]->func;
-			return decls->list[i];
+		for (i = 0; i < decls->count; ++i) {
+			if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
+				ret->decl = decls->list[i]->func;
+				return decls->list[i];
+			}
 		}
 	}
+
 	return NULL;
 }
 static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
@@ -368,15 +674,89 @@ static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
 				impl->func->name);
 		return 0;
 	}
-	if (!validate_set_value(data, ret->set, ret->decl)) {
+
+	if (!validate_set_value(data, ret->set, 1, &ret->decl, impl->decl->args ? (int) impl->decl->args->count : 0, impl->decl->args ? impl->decl->args->args : NULL, 0)) {
 		return 0;
 	}
 
+	impl->decl->impl = impl;
+
 	return 1;
 }
+
 static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 	size_t i, j;
 	/* we can have multiple let stmts */
+
+	/* check that we have a decl arg for every let stmt */
+	for (i = 0; i < impl->stmts->let.count; ++i) {
+		let_stmt *let = impl->stmts->let.list[i];
+		decl_var *let_var;
+		int check = 0;
+
+		if (let->val && let->val->kind == PSI_LET_TMP) {
+			let_var = let->val->data.var;
+		} else {
+			let_var = let->var;
+		}
+
+		if (!locate_decl_var_arg(let_var, impl->decl->args, impl->decl->func)) {
+			data->error(PSI_WARNING, "Unknown variable '%s' in `let` statement"
+					" of implementation '%s'", let_var->name, impl->func->name);
+			return 0;
+		}
+
+		switch (let->val->kind) {
+		case PSI_LET_NULL:
+			break;
+		case PSI_LET_TMP:
+			/* e.g. let bar = &strval($bar); // decl_arg(char **bar) */
+			/* e.g. let foo = *bar;  */
+			let->var->pointer_level = let->val->data.var->pointer_level;
+			let->var->arg = init_decl_arg(
+					init_decl_type(
+							real_decl_type(let->val->data.var->arg->type)->type,
+							real_decl_type(let->val->data.var->arg->type)->name),
+					init_decl_var(
+							let->var->name,
+							let->var->pointer_level,
+							let->var->array_size));
+			break;
+		case PSI_LET_NUMEXP:
+			if (!validate_num_exp(data, impl->decl->args, impl->decl->func, let->val->data.num)) {
+				return 0;
+			}
+			break;
+		case PSI_LET_CALLOC:
+			if (!validate_num_exp(data, impl->decl->args, impl->decl->func, let->val->data.alloc->nmemb)) {
+				return 0;
+			}
+			if (!validate_num_exp(data, impl->decl->args, impl->decl->func, let->val->data.alloc->size)) {
+				return 0;
+			}
+			break;
+		case PSI_LET_FUNC:
+			if (impl->func->args) {
+				for (j = 0; j < impl->func->args->count; ++j) {
+					impl_arg *iarg = impl->func->args->args[j];
+
+					if (!strcmp(let->val->data.func->var->name, iarg->var->name)) {
+						let->val->data.func->arg = iarg;
+						check = 1;
+						break;
+					}
+				}
+			}
+			if (!check) {
+				data->error(PSI_WARNING, "Unknown value '$%s' of `let` statement"
+						" for variable '%s' of implementation '%s'",
+						let->val->data.func->var->name, let->var->name, impl->func->name);
+				return 0;
+			}
+			break;
+		}
+	}
+
 	/* check that we have a let stmt for every decl arg */
 	if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
 		decl_arg *darg = impl->decl->args->args[i];
@@ -399,36 +779,7 @@ static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 			return 0;
 		}
 	}
-	/* check that the let_value references a known variable or NULL */
-	for (i = 0; i < impl->stmts->let.count; ++i) {
-		let_stmt *let = impl->stmts->let.list[i];
-		int check = 0;
 
-		if (let->val && let->val->func && let->val->func->alloc) {
-			if (!validate_decl_type(data, let->val->func->alloc->type)) {
-				data->error(PSI_WARNING, "Cannot use '%s' as type for calloc in `let` statement",
-					let->val->func->alloc->type->name);
-				return 0;
-			}
-		}
-		if (let->val && let->val->var) {
-			if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
-				impl_arg *iarg = impl->func->args->args[j];
-
-				if (!strcmp(let->val->var->name, iarg->var->name)) {
-					let->arg = iarg;
-					check = 1;
-					break;
-				}
-			}
-			if (!check) {
-				data->error(PSI_WARNING, "Unknown value '$%s' of `let` statement"
-						" for variable '%s' of implementation '%s'",
-						let->val->var->name, let->var->name, impl->func->name);
-				return 0;
-			}
-		}
-	}
 	return 1;
 }
 static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
@@ -459,16 +810,35 @@ static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
 			decl_var *set_var = set->val->vars->vars[j];
 
 			check = 0;
-			if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
-				decl_arg *set_arg = impl->decl->args->args[k];
-
-				if (!strcmp(set_var->name, set_arg->var->name)) {
-					check = 1;
-					if (!validate_set_value(data, set->val, set_arg)) {
-						return 0;
+			if (impl->decl->args) {
+				for (k = 0; k < impl->decl->args->count; ++k) {
+					decl_arg *set_arg = impl->decl->args->args[k];
+
+					if (!strcmp(set_var->name, set_arg->var->name)) {
+						check = 1;
+						set_var->arg = set_arg;
+						if (!validate_set_value(data, set->val, 1, &set_arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
+							return 0;
+						}
+						break;
+					}
+				}
+			}
+			if (!check) {
+				for (k = 0; k < impl->stmts->let.count; ++k) {
+					let_stmt *let = impl->stmts->let.list[k];
+
+					/* check temp vars */
+					if (let->val && let->val->kind == PSI_LET_TMP) {
+						if (!strcmp(set_var->name, let->var->name)) {
+							check = 1;
+							set_var->arg = let->var->arg;
+							if (!validate_set_value(data, set->val, 1, &set_var->arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
+								return 0;
+							}
+							break;
+						}
 					}
-					set_var->arg = set_arg;
-					break;
 				}
 			}
 
@@ -482,34 +852,62 @@ static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
 	}
 	return 1;
 }
+static inline decl *locate_free_decl(decls *decls, free_call *f) {
+	if (decls)  {
+		size_t i;
+
+		for (i = 0; i < decls->count; ++i) {
+			if (!strcmp(decls->list[i]->func->var->name, f->func)) {
+				f->decl = decls->list[i];
+				return decls->list[i];
+			}
+		}
+	}
+
+	return NULL;
+}
 static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
-	size_t i, j, k;
+	size_t i, j, k, l;
 	/* we can have any count of free stmts; freeing any out vars */
 	for (i = 0; i < impl->stmts->fre.count; ++i) {
 		free_stmt *fre = impl->stmts->fre.list[i];
 
-		for (j = 0; j < fre->vars->count; ++j) {
-			decl_var *free_var = fre->vars->vars[j];
-			int check = 0;
+		for (j = 0; j < fre->calls->count; ++j) {
+			free_call *free_call = fre->calls->list[j];
 
-			if (!strcmp(free_var->name, impl->decl->func->var->name)) {
-				continue;
+			/* first find the decl of the free func */
+			if (!locate_free_decl(data->decls, free_call)) {
+				data->error(PSI_WARNING, "Unknown function '%s' in `free` statement"
+						" of implementation '%s'", free_call->func, impl->func->name);
+				return 0;
+			}
+			if (!impl->decl->args) {
+				data->error(PSI_WARNING, "Declaration '%s' of implementation '%s'"
+						" does not have any arguments to free",
+						impl->decl->func->var->name, impl->func->name);
 			}
-			if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
-				decl_arg *free_arg = impl->decl->args->args[k];
 
-				if (!strcmp(free_var->name, free_arg->var->name)) {
-					check = 1;
-					free_var->arg = free_arg;
-					break;
+			/* now check for known vars */
+			for (l = 0; l < free_call->vars->count; ++l) {
+				int check = 0;
+				decl_var *free_var = free_call->vars->vars[l];
+
+				for (k = 0; k < impl->decl->args->count; ++k) {
+					decl_arg *free_arg = impl->decl->args->args[k];
+
+					if (!strcmp(free_var->name, free_arg->var->name)) {
+						check = 1;
+						free_var->arg = free_arg;
+						break;
+					}
 				}
-			}
 
-			if (!check) {
-				data->error(PSI_WARNING, "Unknown variable '%s' of `free` statement"
-						" of implementation '%s'",
-						free_var->name, impl->func->name);
-				return 0;
+				if (!check) {
+					data->error(PSI_WARNING, "Unknown variable '%s' of `free` statement"
+							" of implementation '%s'",
+							free_var->name, impl->func->name);
+					return 0;
+				}
 			}
 		}
 	}
@@ -541,8 +939,12 @@ static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
 
 PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErrorFunc error)
 {
-	size_t i, j;
+	size_t i;
 	PSI_Data T;
+	struct psi_predef_type *predef_type;
+	struct psi_predef_const *predef_const;
+	struct psi_predef_struct *predef_struct;
+	struct psi_predef_decl *predef_decl;
 
 	if (!C) {
 		C = malloc(sizeof(*C));
@@ -551,55 +953,73 @@ PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErr
 
 	C->error = error;
 	C->ops = ops;
-	ops->init(C);
+
+	if (ops->init) {
+		ops->init(C);
+	}
+
+	ZEND_ASSERT(ops->call != NULL);
+	ZEND_ASSERT(ops->compile != NULL);
 
 	/* build up predefs in a temporary PSI_Data for validation */
 	memset(&T, 0, sizeof(T));
 	T.error = error;
 
-	for (i = 0; i < psi_predef_type_count(); ++i) {
-		const psi_predef_type *pre = &psi_predef_types[i];
-		decl_type *type = init_decl_type(pre->type_tag, pre->type_name);
-		decl_typedef *def = init_decl_typedef(pre->alias, type);
+	for (predef_type = &psi_predef_types[0]; predef_type->type_tag; ++predef_type) {
+		decl_type *type = init_decl_type(predef_type->type_tag, predef_type->type_name);
+		decl_typedef *def = init_decl_typedef(predef_type->alias, type);
 
 		T.defs = add_decl_typedef(T.defs, def);
 	}
-	for (i = 0; i < psi_predef_const_count(); ++i) {
-		const psi_predef_const *pre = &psi_predef_consts[i];
-		impl_def_val *val = init_impl_def_val(pre->val_type_tag, pre->val_text);
-		const_type *type = init_const_type(pre->type_tag, pre->type_name);
-		constant *constant = init_constant(type, pre->name, val);
+	for (predef_const = &psi_predef_consts[0]; predef_const->type_tag; ++predef_const) {
+		impl_def_val *val = init_impl_def_val(predef_const->val_type_tag, predef_const->val_text);
+		const_type *type = init_const_type(predef_const->type_tag, predef_const->type_name);
+		constant *constant = init_constant(type, predef_const->var_name, val);
 
 		T.consts = add_constant(T.consts, constant);
 	}
-	for (i = 0; i < psi_predef_struct_count(); ++i) {
-		const psi_predef_struct *pre = &psi_predef_structs[i];
+	for (predef_struct = &psi_predef_structs[0]; predef_struct->type_tag; ++predef_struct) {
+		struct psi_predef_struct *member;
 		decl_args *dargs = init_decl_args(NULL);
-		decl_struct *dstruct;
+		decl_struct *dstruct = init_decl_struct(predef_struct->var_name, dargs);
 
-		for (j = 0; j < PSI_PREDEF_STRUCT_MEMBERS; ++j) {
-			const psi_predef_struct_member *member = &pre->members[j];
+		dstruct->size = predef_struct->size;
+		for (member = &predef_struct[1]; member->type_tag; ++member) {
 			decl_type *type;
 			decl_var *dvar;
 			decl_arg *darg;
 
-			if (!member->name) {
-				break;
-			}
-
 			type = init_decl_type(member->type_tag, member->type_name);
-			dvar = init_decl_var(member->name, member->pointer_level, member->array_size);
+			dvar = init_decl_var(member->var_name, member->pointer_level, member->array_size);
 			darg = init_decl_arg(type, dvar);
-			darg->layout = init_decl_struct_layout(member->off, member->len);
+			darg->layout = init_decl_struct_layout(member->offset, member->size);
 			dargs = add_decl_arg(dargs, darg);
 		}
 
-		dstruct = init_decl_struct(pre->name, dargs);
-		dstruct->size = pre->size;
 		T.structs = add_decl_struct(T.structs, dstruct);
+		predef_struct = member;
 	}
+	for (predef_decl = &psi_predef_decls[0]; predef_decl->type_tag; ++predef_decl) {
+		struct psi_predef_decl *farg;
+		decl_type *ftype = init_decl_type(predef_decl->type_tag, predef_decl->type_name);
+		decl_var *fname = init_decl_var(predef_decl->var_name, predef_decl->pointer_level, predef_decl->array_size);
+		decl_arg *func = init_decl_arg(ftype, fname);
+		decl_args *args = init_decl_args(NULL);
+		decl *decl = init_decl(init_decl_abi("default"), func, args);
+
+
+		for (farg = &predef_decl[1]; farg->type_tag; ++farg) {
+			decl_type *arg_type = init_decl_type(farg->type_tag, farg->type_name);
+			decl_var *arg_var = init_decl_var(farg->var_name, farg->pointer_level, farg->array_size);
+			decl_arg *darg = init_decl_arg(arg_type, arg_var);
+			args = add_decl_arg(args, darg);
+		}
 
-	for (i = 0; i < psi_predef_type_count(); ++i) {
+		T.decls = add_decl(T.decls, decl);
+		predef_decl = farg;
+	}
+
+	for (i = 0; i < T.defs->count; ++i) {
 		decl_typedef *def = T.defs->list[i];
 
 		if (validate_decl_typedef(&T, def)) {
@@ -607,7 +1027,7 @@ PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErr
 		}
 	}
 
-	for (i = 0; i < psi_predef_const_count(); ++i) {
+	for (i = 0; i < T.consts->count; ++i) {
 		constant *constant = T.consts->list[i];
 
 		if (validate_constant(&T, constant)) {
@@ -615,7 +1035,7 @@ PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErr
 		}
 	}
 
-	for (i = 0; i < psi_predef_struct_count(); ++i) {
+	for (i = 0; i < T.structs->count; ++i) {
 		decl_struct *dstruct = T.structs->list[i];
 
 		if (validate_decl_struct(&T, dstruct)) {
@@ -623,6 +1043,14 @@ PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErr
 		}
 	}
 
+	for (i = 0; i < T.decls->count; ++i) {
+		decl *decl = T.decls->list[i];
+
+		if (validate_decl(&T, NULL, decl)) {
+			C->decls = add_decl(C->decls, decl);
+		}
+	}
+
 	C->count = 1;
 	C->data = malloc(sizeof(*C->data));
 	PSI_DataExchange(C->data, &T);
@@ -703,47 +1131,66 @@ static int psi_select_dirent(const struct dirent *entry)
 	return 0 == fnmatch("*.psi", entry->d_name, FNM_CASEFOLD);
 }
 
-void PSI_ContextBuild(PSI_Context *C, const char *path)
+void PSI_ContextBuild(PSI_Context *C, const char *paths)
 {
-	int i, n;
+	int i, n, flags = psi_check_env("PSI_DEBUG") ? PSI_PARSER_DEBUG : 0;
+	char *sep = NULL, *cpy = strdup(paths), *ptr = cpy;
 	struct dirent **entries = NULL;
 
-	n = php_scandir(path, &entries, psi_select_dirent, alphasort);
 
-	if (n < 0) {
-		return;
-	} else for (i = 0; i < n; ++i) {
-		char psi[MAXPATHLEN];
-		PSI_Parser P;
+	do {
+		sep = strchr(ptr, ':');
 
-		if (MAXPATHLEN <= slprintf(psi, MAXPATHLEN, "%s/%s", path, entries[i]->d_name)) {
-			C->error(PSI_WARNING, "Path to PSI file too long: %s/%s",
-				path, entries[i]->d_name);
+		if (sep) {
+			*sep = 0;
 		}
-		if (!PSI_ParserInit(&P, psi, C->error, 0)) {
-			C->error(PSI_WARNING, "Failed to init PSI parser (%s): %s",
-				psi, strerror(errno));
-			continue;
+
+		n = php_scandir(ptr, &entries, psi_select_dirent, alphasort);
+
+		if (n > 0) {
+			for (i = 0; i < n; ++i) {
+				char psi[MAXPATHLEN];
+				PSI_Parser P;
+
+				if (MAXPATHLEN <= slprintf(psi, MAXPATHLEN, "%s/%s", ptr, entries[i]->d_name)) {
+					C->error(PSI_WARNING, "Path to PSI file too long: %s/%s",
+						ptr, entries[i]->d_name);
+				}
+				if (!PSI_ParserInit(&P, psi, C->error, flags)) {
+					C->error(PSI_WARNING, "Failed to init PSI parser (%s): %s",
+						psi, strerror(errno));
+					continue;
+				}
+
+				while (0 < PSI_ParserScan(&P)) {
+					PSI_ParserParse(&P, PSI_TokenAlloc(&P));
+					if (P.num == PSI_T_EOF) {
+						break;
+					}
+				}
+
+				PSI_ParserParse(&P, NULL);
+				PSI_ContextValidate(C, &P);
+				PSI_ParserDtor(&P);
+			}
 		}
 
-		while (-1 != PSI_ParserScan(&P)) {
-			PSI_ParserParse(&P, PSI_TokenAlloc(&P));
-		};
-		PSI_ParserParse(&P, NULL);
-		PSI_ContextValidate(C, &P);
-		PSI_ParserDtor(&P);
-	}
+		if (entries) {
+			for (i = 0; i < n; ++i) {
+				free(entries[i]);
+			}
+			free(entries);
+		}
+
+		ptr = sep + 1;
+	} while (sep);
+
 
 	if (PSI_ContextCompile(C) && SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
 		C->error(PSI_WARNING, "Failed to register functions!");
 	}
 
-	if (entries) {
-		for (i = 0; i < n; ++i) {
-			free(entries[i]);
-		}
-		free(entries);
-	}
+	free(cpy);
 
 }
 
@@ -778,24 +1225,305 @@ zend_function_entry *PSI_ContextCompile(PSI_Context *C)
 		}
 	}
 
-
 	return C->closures = C->ops->compile(C);
 }
 
+
+void PSI_ContextCall(PSI_Context *C, decl_callinfo *decl_call, impl_vararg *va)
+{
+	C->ops->call(C, decl_call, va);
+}
+
+static inline void dump_decl_type(int fd, decl_type *t) {
+	const char *pre;
+
+	switch (t->type) {
+	case PSI_T_STRUCT:
+		pre = "struct ";
+		break;
+	default:
+		pre = "";
+	}
+	dprintf(fd, "%s%s", pre, t->name);
+}
+static inline void dump_decl_var(int fd, decl_var *v) {
+	dprintf(fd, "%.*s%s", v->pointer_level-!!v->array_size, "**********", v->name);
+	if (v->array_size) {
+		dprintf(fd, "[%u]", v->array_size);
+	}
+}
+static inline void dump_decl_arg(int fd, decl_arg *a) {
+	dump_decl_type(fd, a->type);
+	dprintf(fd, " ");
+	dump_decl_var(fd, a->var);
+}
+static inline void dump_level(int fd, unsigned level) {
+	dprintf(fd, "%.*s", level, "\t\t\t\t\t\t\t\t\t");
+}
+static inline void dump_num_exp(int fd, num_exp *exp) {
+	while (exp) {
+		switch (exp->t) {
+		case PSI_T_NUMBER:
+			dprintf(fd, "%s", exp->u.numb);
+			break;
+		case PSI_T_NSNAME:
+			dprintf(fd, "%s", exp->u.cnst->name);
+			break;
+		case PSI_T_NAME:
+			dump_decl_var(fd, exp->u.dvar);
+			break;
+		EMPTY_SWITCH_DEFAULT_CASE();
+		}
+		if (exp->operand) {
+			char op;
+
+			switch (exp->operator) {
+			case PSI_T_PLUS:	op = '+'; break;
+			case PSI_T_MINUS:	op = '-'; break;
+			case PSI_T_ASTERISK:op = '*'; break;
+			case PSI_T_SLASH:	op = '/'; break;
+			EMPTY_SWITCH_DEFAULT_CASE();
+			}
+			dprintf(fd, " %c ", op);
+		}
+		exp = exp->operand;
+	}
+}
+static inline void dump_impl_set_value(int fd, set_value *set, unsigned level) {
+	size_t i;
+
+	if (level > 1) {
+		/* only if not directly after `set ...` */
+		dump_level(fd, level);
+	}
+	dprintf(fd, "%s(", set->func->name);
+
+	for (i = 0; i < set->vars->count; ++i) {
+		decl_var *svar = set->vars->vars[i];
+		if (i) {
+			dprintf(fd, ", ");
+		}
+		dump_decl_var(fd, svar);
+	}
+	if (set->num) {
+		dprintf(fd, ", ");
+		dump_num_exp(fd, set->num);
+	}
+	if (set->inner) {
+		dprintf(fd, ",\n");
+		for (i = 0; i < set->count; ++i) {
+			dump_impl_set_value(fd, set->inner[i], level+1);
+		}
+		/* only if inner stmts, i.e. with new lines, were dumped */
+		dump_level(fd, level);
+	}
+	if (level > 1) {
+		dprintf(fd, "),\n");
+	} else {
+		dprintf(fd, ");\n");
+	}
+}
+void PSI_ContextDump(PSI_Context *C, int fd)
+{
+	size_t i, j, k, l;
+
+#ifdef HAVE_LIBJIT
+	if (C->ops == PSI_Libjit()) {
+		dprintf(fd, "// psi.engine=jit\n");
+	}
+#endif
+#ifdef HAVE_LIBFFI
+	if (C->ops == PSI_Libffi()) {
+		dprintf(fd, "// psi.engine=ffi\n");
+	}
+#endif
+	dprintf(fd, "\n");
+
+	if (C->defs) {
+		for (i = 0; i < C->defs->count; ++i) {
+			decl_typedef *tdef = C->defs->list[i];
+
+			dprintf(fd, "typedef ");
+			dump_decl_type(fd, tdef->type);
+			dprintf(fd, " %s;\n", tdef->alias);
+		}
+		dprintf(fd, "\n");
+	}
+
+	if (C->structs) {
+		for (i = 0; i < C->structs->count; ++i) {
+			decl_struct *strct = C->structs->list[i];
+
+			dprintf(fd, "struct %s::(%zu) {\n", strct->name, strct->size);
+			if (strct->args) for (j = 0; j < strct->args->count; ++j) {
+				decl_arg *sarg = strct->args->args[j];
+
+				dprintf(fd, "\t");
+				dump_decl_arg(fd, sarg);
+				dprintf(fd, "::(%zu, %zu);\n", sarg->layout->pos, sarg->layout->len);
+			}
+			dprintf(fd, "}\n");
+		}
+		dprintf(fd, "\n");
+	}
+	if (C->consts) {
+		for (i = 0; i < C->consts->count; ++i) {
+			constant *cnst = C->consts->list[i];
+
+			dprintf(fd, "const %s %s = ", cnst->type->name, cnst->name);
+			if (cnst->val->type == PSI_T_QUOTED_STRING) {
+				dprintf(fd, "\"%s\";\n", cnst->val->text);
+			} else {
+				dprintf(fd, "%s;\n", cnst->val->text);
+			}
+		}
+		dprintf(fd, "\n");
+	}
+	if (C->decls) {
+		for (i = 0; i < C->decls->count; ++i) {
+			decl *decl = C->decls->list[i];
+
+			dprintf(fd, "%s ", decl->abi->convention);
+			dump_decl_arg(fd, decl->func);
+			dprintf(fd, "(");
+			if (decl->args) {
+				for (j = 0; j < decl->args->count; ++j) {
+					if (j) {
+						dprintf(fd, ", ");
+					}
+					dump_decl_arg(fd, decl->args->args[j]);
+				}
+				if (decl->args->varargs) {
+					dprintf(fd, ", ...");
+				}
+			}
+			dprintf(fd, ");\n");
+		}
+		dprintf(fd, "\n");
+	}
+	if (C->impls) {
+		for (i = 0; i < C->impls->count; ++i) {
+			impl *impl = C->impls->list[i];
+
+			dprintf(fd, "function %s(", impl->func->name);
+			if (impl->func->args) {
+				for (j = 0; j < impl->func->args->count; ++j) {
+					impl_arg *iarg = impl->func->args->args[j];
+
+					dprintf(fd, "%s%s %s$%s",
+							j ? ", " : "",
+							iarg->type->name,
+							iarg->var->reference ? "&" : "",
+							iarg->var->name);
+					if (iarg->def) {
+						dprintf(fd, " = %s", iarg->def->text);
+					}
+				}
+				if (impl->func->args->vararg.name) {
+					impl_arg *vararg = impl->func->args->vararg.name;
+
+					dprintf(fd, ", %s %s...$%s",
+							vararg->type->name,
+							vararg->var->reference ? "&" : "",
+							vararg->var->name);
+				}
+			}
+			dprintf(fd, ") : %s%s {\n",
+					impl->func->return_reference ? "&":"",
+					impl->func->return_type->name);
+			if (impl->stmts) {
+				for (j = 0; j < impl->stmts->let.count; ++j) {
+					let_stmt *let = impl->stmts->let.list[j];
+
+					dprintf(fd, "\tlet %s", let->var->name);
+					if (let->val) {
+						dprintf(fd, " = %s", let->val->flags.one.is_reference ? "&" : "");
+						switch (let->val->kind) {
+						case PSI_LET_NULL:
+							dprintf(fd, "NULL");
+							break;
+						case PSI_LET_TMP:
+							dump_decl_var(fd, let->val->data.var);
+							break;
+						case PSI_LET_CALLOC:
+							dprintf(fd, "calloc(");
+							dump_num_exp(fd, let->val->data.alloc->nmemb);
+							dprintf(fd, ", ");
+							dump_num_exp(fd, let->val->data.alloc->size);
+							dprintf(fd, ")");
+							break;
+						case PSI_LET_FUNC:
+							dprintf(fd, "%s($%s)", let->val->data.func->name,
+									let->val->data.func->var->name);
+							break;
+
+						EMPTY_SWITCH_DEFAULT_CASE();
+						}
+						dprintf(fd, ";\n");
+					}
+				}
+				for (j = 0; j < impl->stmts->ret.count; ++j) {
+					return_stmt *ret = impl->stmts->ret.list[j];
+
+					dprintf(fd, "\treturn ");
+					dump_impl_set_value(fd, ret->set, 1);
+				}
+				for (j = 0; j < impl->stmts->set.count; ++j) {
+					set_stmt *set = impl->stmts->set.list[j];
+
+					dprintf(fd, "\tset $%s = ", set->var->name);
+					dump_impl_set_value(fd, set->val, 1);
+				}
+				for (j = 0; j < impl->stmts->fre.count; ++j) {
+					free_stmt *fre = impl->stmts->fre.list[j];
+
+					dprintf(fd, "\tfree ");
+					for (k = 0; k < fre->calls->count; ++k) {
+						free_call *call = fre->calls->list[k];
+
+						if (k) {
+							dprintf(fd, ", ");
+						}
+						dprintf(fd, "%s(", call->func);
+						for (l = 0; l < call->vars->count; ++l) {
+							decl_var *fvar = call->vars->vars[l];
+
+							dump_decl_var(fd, fvar);
+						}
+						dprintf(fd, ");\n");
+					}
+				}
+			}
+			dprintf(fd, "}\n");
+		}
+		dprintf(fd, "\n");
+	}
+}
+
 void PSI_ContextDtor(PSI_Context *C)
 {
 	size_t i;
+	zend_function_entry *zfe;
 
-	C->ops->dtor(C);
+	if (C->ops->dtor) {
+		C->ops->dtor(C);
+	}
 
 	free_decl_libs(&C->psi.libs);
 
-	for (i = 0; i < C->count; ++i) {
-		PSI_DataDtor(&C->data[i]);
+	if (C->data) {
+		for (i = 0; i < C->count; ++i) {
+			PSI_DataDtor(&C->data[i]);
+		}
+		free(C->data);
 	}
 
-	free(C->data);
-	free(C->closures);
+	if (C->closures) {
+		for (zfe = C->closures; zfe->fname; ++zfe) {
+			free((void *) zfe->arg_info);
+		}
+		free(C->closures);
+	}
 
 	if (C->consts) {
 		if (C->consts->list) {