+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, '/')) {
+#ifdef DARWIN
+ len = snprintf(lib, MAXPATHLEN, "lib%s.dylib", ptr);
+#else
+ len = snprintf(lib, MAXPATHLEN, "lib%s.so", ptr);
+#endif
+ if (MAXPATHLEN == len) {
+ data->error(PSI_WARNING, "Library name too long: '%s'", ptr);
+ }
+ lib[len] = 0;
+ ptr = lib;
+ }
+ if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
+ data->error(PSI_WARNING, "Could not open library '%s': %s.",
+ data->psi.file.fn, dlerror());
+ return 0;
+ }
+ return 1;
+}
+
+static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
+ size_t i;
+
+ 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;
+ 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;
+ }
+ return validate_decl_type(data, type->real);
+ 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(PSI_WARNING, "Type '%s' cannot be aliased to '%s'",
+ def->type->name, 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(PSI_WARNING, "Cannot use '%s' as type for '%s'",
+ arg->type->name, 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;
+
+ 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;
+ }
+ }
+ data->error(PSI_WARNING, "Invalid calling convention: '%s'", abi->convention);
+ return 0;
+}
+static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_arg *func)
+{
+ if (!strcmp(func->var->name, "dlsym")) {
+ data->error(PSI_WARNING, "Cannot dlsym dlsym (sic!)");
+ return 0;
+ }
+
+ if (!validate_decl_arg(data, func)) {
+ return 0;
+ }
+#ifndef RTLD_NEXT
+# define RTLD_NEXT ((void *) -1l)
+#endif
+ decl->dlptr = dlsym(dl ?: RTLD_NEXT, func->var->name);
+ if (!decl->dlptr) {
+ data->error(PSI_WARNING, "Failed to located 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)) {
+ 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 *locate_impl_decl(decls *decls, return_stmt *ret) {
+ size_t i;
+
+ for (i = 0; i < decls->count; ++i) {
+ if (!strcmp(decls->list[i]->func->var->name, ret->decl->name)) {
+ ret->decl->arg = decls->list[i]->func;
+ return decls->list[i];
+ }
+ }
+ return NULL;
+}
+static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
+ /* 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(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(PSI_WARNING, "Missing `return` statement for implementation %s",
+ impl->func->name);
+ }
+ return 0;
+ }
+ if (!(impl->decl = locate_impl_decl(data->decls, impl->stmts->ret.list[0]))) {
+ data->error(PSI_WARNING, "Missing declaration for implementation %s",
+ impl->func->name);
+ return 0;
+ }
+
+ 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 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(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;
+ }
+ }
+ /* 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 '$%s' of `let` statement"
+ " for variable '%s' of implementation '%s'",
+ let->val->var->name, let->var->name, impl->func->name);
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
+ size_t i, j, k;
+ /* we can have any count of set stmts; processing out vars */
+ /* check that set stmts reference known variables */
+ for (i = 0; i < impl->stmts->set.count; ++i) {
+ set_stmt *set = impl->stmts->set.list[i];
+ int check = 0;
+
+ if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
+ impl_arg *iarg = impl->func->args->args[j];
+
+ if (!strcmp(set->var->name, iarg->var->name)) {
+ set->arg = iarg;
+ check = 1;
+ break;
+ }
+ }
+ if (!check) {
+ data->error(PSI_WARNING, "Unknown variable '$%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;
+ break;
+ }
+ }
+
+ if (!check) {
+ data->error(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 int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
+ size_t i, j, k;
+ /* 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;
+
+ if (!strcmp(free_var->name, impl->decl->func->var->name)) {
+ continue;
+ }
+ 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;
+ }
+ }
+
+ if (!check) {
+ data->error(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(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;
+}
+
projects / m6w6 / ext-psi / commitdiff
