better errors
[m6w6/ext-psi] / src / context.c
index 49391305879892bfc33399d34ab0a4c0be77f4ec..a75368eb108dc240741937bfc90b0b912c83bc8c 100644 (file)
+#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_SYSLOG_H
+# include <syslog.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 <dirent.h>
+#include <dlfcn.h>
 #include <fnmatch.h>
-#include <errno.h>
 
 #include "php.h"
 #include "php_scandir.h"
-#include "context.h"
-#include "parser.h"
-#include "validator.h"
+#include "php_psi.h"
+
+#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_types[] = {
+       PSI_TYPES
+       {0}
+};
+
+static struct psi_predef_const {
+       token_t type_tag;
+       const char *type_name;
+       const char *var_name;
+       const char *val_text;
+       token_t val_type_tag;
+} psi_predef_consts[] = {
+       PSI_CONSTS
+       {0}
+};
+
+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;
+}
+
+static struct psi_func_redir {
+       const char *name;
+       void (*func)(void);
+} psi_func_redirs[] = {
+       {"glob", (void (*)(void)) psi_glob},
+       PSI_REDIRS
+       {0}
+};
+
+static struct psi_predef_decl {
+       token_t type_tag;
+       const char *type_name;
+       const char *var_name;
+       size_t pointer_level;
+       size_t array_size;
+} psi_predef_decls[] = {
+       PSI_DECLS
+       {0}
+};
+static struct psi_predef_decl psi_predef_vararg_decls[] = {
+       PSI_VA_DECLS
+       {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}
+};
+
+static int validate_lib(PSI_Data *data, void **dlopened) {
+       char lib[MAXPATHLEN];
+       const char *ptr = data->psi.file.ln;
+       size_t len;
+
+       if (!ptr) {
+               /* FIXME: assume stdlib */
+               return 1;
+       } else if (!strchr(ptr, '/')) {
+               len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
+               if (MAXPATHLEN == len) {
+                       data->error(NULL, PSI_WARNING, "Library name too long: '%s'", ptr);
+               }
+               lib[len] = 0;
+               ptr = lib;
+       }
+       if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
+               data->error(NULL, PSI_WARNING, "Could not open library '%s': %s.",
+                               data->psi.file.ln, dlerror());
+               return 0;
+       }
+       return 1;
+}
+
+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) {
+               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) {
+       size_t i;
+
+       if (type->strct) {
+               return 1;
+       }
+       for (i = 0; i < structs->count; ++i) {
+               if (!strcmp(structs->list[i]->name, type->name)) {
+                       type->strct = structs->list[i];
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
+       switch (type->type) {
+       case PSI_T_NAME:
+               if (!data->defs || !locate_decl_type_alias(data->defs, type)) {
+                       return 0;
+               }
+               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;
+               }
+               break;
+       }
+       return 1;
+}
+static inline int validate_decl_typedef(PSI_Data *data, decl_typedef *def) {
+       if (!validate_decl_type(data, def->type)) {
+               data->error(def->token, 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 */
+       return 1;
+}
+
+static inline int validate_constant(PSI_Data *data, constant *c) {
+       /* FIXME */
+       return 1;
+}
+
+static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
+       if (!validate_decl_type(data, arg->type)) {
+               data->error(arg->type->token, PSI_WARNING,
+                       "Cannot use '%s'(%d) as type for decl var '%s'",
+                       arg->type->name, arg->type->type, arg->var->name);
+               return 0;
+       }
+       return 1;
+}
+
+static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
+       size_t i;
+
+       for (i = 0; i < s->args->count; ++i) {
+               if (!validate_decl_arg(data, s->args->args[i])) {
+                       return 0;
+               }
+       }
+
+       for (i = 0; i < s->args->count; ++i) {
+               decl_arg *darg = s->args->args[i];
+
+               if (!validate_decl_arg(data, darg)) {
+                       return 0;
+               }
+
+               ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
+               darg->var->arg = darg;
+
+               if (!darg->layout) {
+                       token_t t;
+
+                       if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level == 1)) {
+                               t = PSI_T_POINTER;
+                       } else {
+                               t = real_decl_type(darg->type)->type;
+                       }
+
+                       if (i) {
+                               decl_arg *last = s->args->args[i-1];
+                               darg->layout = init_decl_struct_layout(
+                                               psi_t_align(t, last->layout->pos + last->layout->len),
+                                               psi_t_size(t) * darg->var->array_size);
+                       } else {
+                               darg->layout = init_decl_struct_layout(0, psi_t_size(t));
+                       }
+               }
+               if (s->size < darg->layout->pos + darg->layout->len) {
+                       s->size = darg->layout->pos + darg->layout->len;
+               }
+       }
+       return 1;
+}
+
+static const char * const abi_ccs[] = {
+               "default", /* \                 */
+               "extern",  /*  > - all the same */
+               "cdecl",   /* /                 */
+               "stdcall",
+               "fastcall",
+};
+static inline int validate_decl_abi(PSI_Data *data, decl_abi *abi) {
+       size_t i;
+
+       for (i = 0; i < sizeof(abi_ccs)/sizeof(char*); ++i) {
+               if (strcasecmp(abi->convention, abi_ccs[i])) {
+                       return 1;
+               }
+       }
+       return 0;
+}
+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(func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
+               return 0;
+       }
+
+       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->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
+               if (!decl->call.sym) {
+                       data->error(func->token, PSI_WARNING,
+                               "Failed to locate symbol '%s': %s",
+                               func->var->name, dlerror());
+               }
+       }
+       return 1;
+}
+
+static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
+       if (!validate_decl_abi(data, decl->abi)) {
+               data->error(decl->abi->token, PSI_WARNING,
+                               "Invalid calling convention: '%s'", decl->abi->token->text);
+               return 0;
+       }
+       if (!validate_decl_func(data, dl, decl, decl->func)) {
+               return 0;
+       }
+       if (decl->args) {
+               size_t i;
+
+               for (i = 0; i < decl->args->count; ++i) {
+                       if (!validate_decl_arg(data, decl->args->args[i])) {
+                               return 0;
+                       }
+               }
+       }
+       return 1;
+}
+static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
+       size_t i;
+
+       for (i = 0; i < args->count; ++i) {
+               decl_arg *arg = args->args[i];
+
+               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 constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
+       size_t i;
+
+       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(exp->token, 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(exp->token, 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;
+               break;
+       case PSI_T_TO_INT:
+               set->func->handler = psi_to_int;
+               break;
+       case PSI_T_TO_FLOAT:
+               set->func->handler = psi_to_double;
+               break;
+       case PSI_T_TO_STRING:
+               set->func->handler = psi_to_string;
+               break;
+       case PSI_T_TO_ARRAY:
+               set->func->handler = psi_to_array;
+               break;
+       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;
+
+       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 (!validate_set_value_handler(set)) {
+               data->error(set->func->token, PSI_WARNING, "Invalid cast '%s'", set->func->name);
+               return 0;
+       }
+
+       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(svar->token, 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(set->func->token, 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 (strcmp(sub_var->name, set_var->name)) {
+                               data->error(sub_var->token, 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(set->func->token, 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) {
+       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];
+                       }
+               }
+       }
+
+       return NULL;
+}
+static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
+       return_stmt *ret;
+
+       /* we must have exactly one ret stmt delcaring the native func to call */
+       /* and which type cast to apply */
+       if (impl->stmts->ret.count != 1) {
+               if (impl->stmts->ret.count > 1) {
+                       data->error(impl->stmts->ret.list[1]->token, PSI_WARNING,
+                                       "Too many `return` statements for implmentation %s;"
+                                       " found %zu, exactly one is needed",
+                                       impl->func->name, impl->stmts->ret.count);
+               } else {
+                       data->error(impl->func->token, PSI_WARNING,
+                                       "Missing `return` statement for implementation %s",
+                                       impl->func->name);
+               }
+               return 0;
+       }
+
+       ret = impl->stmts->ret.list[0];
+
+       if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
+               data->error(ret->token, PSI_WARNING,
+                               "Missing declaration '%s' for `return` statment for implementation %s",
+                               ret->set->vars->vars[0]->name, impl->func->name);
+               return 0;
+       }
+
+       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(let_var->token, 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(let->var->token, 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];
+               int check = 0;
+
+               for (j = 0; j < impl->stmts->let.count; ++j) {
+                       let_stmt *let = impl->stmts->let.list[j];
+
+                       if (!strcmp(let->var->name, darg->var->name)) {
+                               darg->let = let;
+                               check = 1;
+                               break;
+                       }
+               }
+               if (!check) {
+                       data->error(impl->func->token, PSI_WARNING,
+                                       "Missing `let` statement for arg '%s %.*s%s'"
+                                       " of declaration '%s' for implementation '%s'",
+                                       darg->type->name, (int) darg->var->pointer_level, "*****",
+                                       darg->var->name, impl->decl->func->var->name, impl->func->name);
+                       return 0;
+               }
+       }
+
+       return 1;
+}
+static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
+       size_t i, j, k;
+       /* we can have any count of set stmts; processing out vars */
+       /* check that set stmts reference known variables */
+       for (i = 0; i < impl->stmts->set.count; ++i) {
+               set_stmt *set = impl->stmts->set.list[i];
+               int check = 0;
+
+               if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
+                       impl_arg *iarg = impl->func->args->args[j];
+
+                       if (!strcmp(set->var->name, iarg->var->name)) {
+                               set->arg = iarg;
+                               check = 1;
+                               break;
+                       }
+               }
+               if (!check) {
+                       data->error(set->var->token, PSI_WARNING, "Unknown variable '$%s' of `set` statement"
+                                       " of implementation '%s'",
+                                       set->var->name, impl->func->name);
+                       return 0;
+               }
+
+               for (j = 0; j < set->val->vars->count; ++j) {
+                       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;
+                                               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;
+                                               }
+                                       }
+                               }
+                       }
+
+                       if (!check) {
+                               data->error(set_var->token, PSI_WARNING, "Unknown value '%s' of `set` statement"
+                                               " for variable '$%s' of implementation '%s'",
+                                               set_var->name, set->arg->var->name, impl->func->name);
+                               return 0;
+                       }
+               }
+       }
+       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, 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->calls->count; ++j) {
+                       free_call *free_call = fre->calls->list[j];
+
+                       /* first find the decl of the free func */
+                       if (!locate_free_decl(data->decls, free_call)) {
+                               data->error(free_call->token, PSI_WARNING,
+                                               "Missing declaration '%s' in `free` statement"
+                                               " of implementation '%s'",
+                                               free_call->func, impl->func->name);
+                               return 0;
+                       }
+                       if (!impl->decl->args) {
+                               data->error(free_call->token, PSI_WARNING,
+                                               "Declaration '%s' of implementation '%s'"
+                                               " does not have any arguments to free",
+                                               impl->decl->func->var->name, impl->func->name);
+                       }
+
+                       /* 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(free_var->token, PSI_WARNING,
+                                                       "Unknown variable '%s' of `free` statement"
+                                                       " of implementation '%s'",
+                                                       free_var->name, impl->func->name);
+                                       return 0;
+                               }
+                       }
+               }
+       }
+       return 1;
+}
+static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
+       if (!impl->stmts) {
+               data->error(impl->func->token, PSI_WARNING,
+                               "Missing body for implementation %s!",
+                               impl->func->name);
+               return 0;
+       }
+
+       if (!validate_impl_ret_stmt(data, impl)) {
+               return 0;
+       }
+
+       if (!validate_impl_let_stmts(data, impl)) {
+               return 0;
+       }
+       if (!validate_impl_set_stmts(data, impl)) {
+               return 0;
+       }
+       if (!validate_impl_free_stmts(data, impl)) {
+               return 0;
+       }
+
+       return 1;
+}
 
 PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErrorFunc error)
 {
+       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));
        }
@@ -18,11 +956,195 @@ 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 (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 (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 (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 = init_decl_struct(predef_struct->var_name, dargs);
+
+               dstruct->size = predef_struct->size;
+               for (member = &predef_struct[1]; member->type_tag; ++member) {
+                       decl_type *type;
+                       decl_var *dvar;
+                       decl_arg *darg;
+
+                       type = init_decl_type(member->type_tag, member->type_name);
+                       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->offset, member->size);
+                       dargs = add_decl_arg(dargs, darg);
+               }
+
+               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);
+               }
+
+               T.decls = add_decl(T.decls, decl);
+               predef_decl = farg;
+       }
+
+       for (predef_decl = &psi_predef_vararg_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);
+               }
+               args->varargs = 1;
+
+               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)) {
+                       C->defs = add_decl_typedef(C->defs, def);
+               }
+       }
+
+       for (i = 0; i < T.consts->count; ++i) {
+               constant *constant = T.consts->list[i];
+
+               if (validate_constant(&T, constant)) {
+                       C->consts = add_constant(C->consts, constant);
+               }
+       }
+
+       for (i = 0; i < T.structs->count; ++i) {
+               decl_struct *dstruct = T.structs->list[i];
+
+               if (validate_decl_struct(&T, dstruct)) {
+                       C->structs = add_decl_struct(C->structs, dstruct);
+               }
+       }
+
+       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);
 
        return C;
 }
 
+int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
+{
+       PSI_Data *D;
+       void *dlopened = NULL;
+       size_t count = C->count++;
+
+       C->data = realloc(C->data, C->count * sizeof(*C->data));
+       D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
+
+       if (D->defs) {
+               size_t i;
+
+               for (i = 0; i < D->defs->count; ++i) {
+                       if (validate_decl_typedef(PSI_DATA(C), D->defs->list[i])) {
+                               C->defs = add_decl_typedef(C->defs, D->defs->list[i]);
+                       }
+               }
+       }
+       if (D->structs) {
+               size_t i;
+
+               for (i = 0; i < D->structs->count; ++i) {
+                       if (validate_decl_struct(PSI_DATA(C), D->structs->list[i])) {
+                               C->structs = add_decl_struct(C->structs, D->structs->list[i]);
+                       }
+               }
+       }
+       if (D->consts) {
+               size_t i;
+
+               for (i = 0; i < D->consts->count; ++i) {
+                       if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
+                               C->consts = add_constant(C->consts, D->consts->list[i]);
+                       }
+               }
+       }
+
+       if (!validate_lib(D, &dlopened)) {
+               return 0;
+       }
+
+       add_decl_lib(&C->psi.libs, dlopened);
+
+       if (D->decls) {
+               size_t i;
+
+               for (i = 0; i < D->decls->count; ++i) {
+                       if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
+                               C->decls = add_decl(C->decls, D->decls->list[i]);
+                       }
+               }
+       }
+       if (D->impls) {
+               size_t i;
+
+               for (i = 0; i < D->impls->count; ++i) {
+                       if (validate_impl_stmts(PSI_DATA(C), D->impls->list[i])) {
+                               C->impls = add_impl(C->impls, D->impls->list[i]);
+                       }
+               }
+       }
+
+       return 1;
+}
+
 static int psi_select_dirent(const struct dirent *entry)
 {
 #ifndef FNM_CASEFOLD
@@ -31,74 +1153,81 @@ 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;
-               PSI_Validator V;
+       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 (!PSI_ParserInit(&P, psi, C->error, 0)) {
-                       C->error(PSI_WARNING, "Failed to init PSI parser (%s): %s",
-                               psi, strerror(errno));
-                       continue;
+               if (sep) {
+                       *sep = 0;
                }
 
-               while (-1 != PSI_ParserScan(&P)) {
-                       PSI_ParserParse(&P, PSI_TokenAlloc(&P));
-               };
-               PSI_ParserParse(&P, NULL);
+               n = php_scandir(ptr, &entries, psi_select_dirent, alphasort);
 
-               if (!PSI_ValidatorInit(&V, &P)) {
-                       C->error(PSI_WARNING, "Failed to init PSI validator");
-                       break;
-               }
-               PSI_ParserDtor(&P);
+               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(NULL, 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(NULL, PSI_WARNING, "Failed to init PSI parser (%s): %s",
+                                               psi, strerror(errno));
+                                       continue;
+                               }
 
-               if (PSI_ValidatorValidate(&V)) {
-                       zend_function_entry *closures;
+                               while (0 < PSI_ParserScan(&P)) {
+                                       PSI_ParserParse(&P, PSI_TokenAlloc(&P));
+                                       if (P.num == PSI_T_EOF) {
+                                               break;
+                                       }
+                               }
 
-                       closures = PSI_ContextCompile(C, (PSI_Data *) &V);
-                       if (closures && SUCCESS != zend_register_functions(NULL, closures, NULL, MODULE_PERSISTENT)) {
-                               C->error(PSI_WARNING, "Failed to register functions!");
+                               PSI_ParserParse(&P, NULL);
+                               PSI_ContextValidate(C, &P);
+                               PSI_ParserDtor(&P);
                        }
                }
-               PSI_ValidatorDtor(&V);
-       }
-       if (entries) {
-               for (i = 0; i < n; ++i) {
-                       free(entries[i]);
+
+               if (entries) {
+                       for (i = 0; i < n; ++i) {
+                               free(entries[i]);
+                       }
+                       free(entries);
                }
-               free(entries);
+
+               ptr = sep + 1;
+       } while (sep);
+
+
+       if (PSI_ContextCompile(C) && SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
+               C->error(NULL, PSI_WARNING, "Failed to register functions!");
        }
 
+       free(cpy);
+
 }
 
-zend_function_entry *PSI_ContextCompile(PSI_Context *C, PSI_Data *D)
+zend_function_entry *PSI_ContextCompile(PSI_Context *C)
 {
-       size_t i, count = C->count++;
-       zend_function_entry *zfe;
+       size_t i;
 
-       if (D->consts) {
+       if (C->consts) {
                zend_constant zc;
 
                zc.flags = CONST_PERSISTENT|CONST_CS;
                zc.module_number = EG(current_module)->module_number;
 
-               for (i = 0; i < D->consts->count; ++i) {
-                       constant *c = D->consts->list[i];
+               for (i = 0; i < C->consts->count; ++i) {
+                       constant *c = C->consts->list[i];
 
                        zc.name = zend_string_init(c->name + (c->name[0] == '\\'), strlen(c->name) - (c->name[0] == '\\'), 1);
                        ZVAL_NEW_STR(&zc.value, zend_string_init(c->val->text, strlen(c->val->text), 1));
@@ -118,31 +1247,336 @@ zend_function_entry *PSI_ContextCompile(PSI_Context *C, PSI_Data *D)
                }
        }
 
-       C->data = realloc(C->data, C->count * sizeof(*C->data));
-       PSI_DataExchange(&C->data[count], D);
+       return C->closures = C->ops->compile(C);
+}
 
-       zfe = C->ops->compile(C, &C->data[count]);
 
-       C->closures = realloc(C->closures, C->count * sizeof(*C->closures));
-       C->closures[count] = zfe;
+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);
 
-       return zfe;
+       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;
+
+       if (C->ops->dtor) {
+               C->ops->dtor(C);
+       }
+
+       free_decl_libs(&C->psi.libs);
 
-       C->ops->dtor(C);
+       if (C->data) {
+               for (i = 0; i < C->count; ++i) {
+                       PSI_DataDtor(&C->data[i]);
+               }
+               free(C->data);
+       }
 
-       for (i = 0; i < C->count; ++i) {
-               PSI_DataDtor(&C->data[i]);
-               if (C->closures[i]){
-                       free(C->closures[i]);
+       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) {
+                       free(C->consts->list);
+               }
+               free(C->consts);
+       }
+       if (C->defs) {
+               if (C->defs->list) {
+                       free(C->defs->list);
                }
+               free(C->defs);
+       }
+       if (C->structs) {
+               if (C->structs->list) {
+                       free(C->structs->list);
+               }
+               free(C->structs);
+       }
+       if (C->decls) {
+               if (C->decls->list) {
+                       free(C->decls->list);
+               }
+               free(C->decls);
+       }
+       if (C->impls) {
+               if (C->impls->list) {
+                       free(C->impls->list);
+               }
+               free(C->impls);
        }
-       free(C->data);
-       free(C->closures);
 
        memset(C, 0, sizeof(*C));
 }
@@ -155,4 +1589,3 @@ void PSI_ContextFree(PSI_Context **C)
                *C = NULL;
        }
 }
-