X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=src%2Flibffi.c;h=301995e5903d9bc377c3d2630f1be48fed9e0513;hp=f1d72829ae5c231d7d88c628bdebf5272a0dc39a;hb=d3171526ab7658114cac4ebe1098af4b038e576e;hpb=d560a27ff8431c678d25ecf4d8190b562a766f41

diff --git a/src/libffi.c b/src/libffi.c
index f1d7282..301995e 100644
--- a/src/libffi.c
+++ b/src/libffi.c
@@ -1,6 +1,14 @@
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include "php.h"
+
+#ifdef HAVE_LIBFFI
+
 #include "php_psi.h"
 #include "libffi.h"
+#include "engine.h"
 
 #undef PACKAGE
 #undef PACKAGE_BUGREPORT
@@ -49,11 +57,12 @@ static void psi_ffi_closure_free(void *c)
 }
 
 static void psi_ffi_handler(ffi_cif *signature, void *_result, void **_args, void *_data);
+static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg);
 
 static inline ffi_abi psi_ffi_abi(const char *convention) {
 	return FFI_DEFAULT_ABI;
 }
-static inline ffi_type *psi_ffi_type(token_t t) {
+static inline ffi_type *psi_ffi_token_type(token_t t) {
 	switch (t) {
 	default:
 		ZEND_ASSERT(0);
@@ -79,15 +88,131 @@ static inline ffi_type *psi_ffi_type(token_t t) {
 	case PSI_T_BOOL:
 		return &ffi_type_uchar;
 	case PSI_T_INT:
+	case PSI_T_ENUM:
 		return &ffi_type_sint;
+	case PSI_T_LONG:
+		return &ffi_type_slong;
 	case PSI_T_FLOAT:
 		return &ffi_type_float;
 	case PSI_T_DOUBLE:
 		return &ffi_type_double;
+#ifdef HAVE_LONG_DOUBLE
+	case PSI_T_LONG_DOUBLE:
+		return &ffi_type_longdouble;
+#endif
+	case PSI_T_POINTER:
+		return &ffi_type_pointer;
+	}
+}
+static inline ffi_type *psi_ffi_impl_type(token_t impl_type) {
+	switch (impl_type) {
+	case PSI_T_BOOL:
+		return &ffi_type_sint8;
+	case PSI_T_INT:
+		return &ffi_type_sint64;
+	case PSI_T_STRING:
+		return &ffi_type_pointer;
+	case PSI_T_FLOAT:
+	case PSI_T_DOUBLE:
+		return &ffi_type_double;
+	EMPTY_SWITCH_DEFAULT_CASE();
+	}
+	return NULL;
+}
+static void psi_ffi_struct_type_dtor(void *type) {
+	ffi_type *strct = type;
+
+	if (strct->elements) {
+		ffi_type **ptr;
+
+		for (ptr = strct->elements; *ptr; ++ptr) {
+			free(*ptr);
+		}
+		free(strct->elements);
 	}
+	free(strct);
+}
+
+static size_t psi_ffi_struct_type_pad(ffi_type **els, size_t padding) {
+	size_t i;
+
+	for (i = 0; i < padding; ++i) {
+		ffi_type *pad = malloc(sizeof(*pad));
+
+		memcpy(pad, &ffi_type_schar, sizeof(*pad));
+		*els++ = pad;
+	}
+
+	return padding;
+}
+
+static ffi_type **psi_ffi_struct_type_elements(decl_struct *strct) {
+	size_t i, argc = strct->args->count, nels = 0, offset = 0, maxalign = 0;
+	ffi_type **els = calloc(argc + 1, sizeof(*els));
+
+	for (i = 0; i < strct->args->count; ++i) {
+		decl_arg *darg = strct->args->args[i];
+		ffi_type *type = malloc(sizeof(*type));
+		size_t padding;
+
+		memcpy(type, psi_ffi_decl_arg_type(darg), sizeof(*type));
+
+		ZEND_ASSERT(type->size == darg->layout->len);
+
+		if (type->alignment > maxalign) {
+			maxalign = type->alignment;
+		}
+
+		if ((padding = psi_offset_padding(darg->layout->pos - offset, type->alignment))) {
+			if (nels + padding + 1 > argc) {
+				argc += padding;
+				els = realloc(els, (argc + 1) * sizeof(*els));
+				els[argc] = NULL;
+			}
+			psi_ffi_struct_type_pad(&els[nels], padding);
+			nels += padding;
+			offset += padding;
+		}
+		ZEND_ASSERT(offset == darg->layout->pos);
+
+		offset = (offset + darg->layout->len + type->alignment - 1) & ~(type->alignment - 1);
+		els[nels++] = type;
+	}
+
+	/* apply struct alignment padding */
+	offset = (offset + maxalign - 1) & ~(maxalign - 1);
+
+	ZEND_ASSERT(offset <= strct->size);
+	if (offset < strct->size) {
+		psi_ffi_struct_type_pad(&els[nels], strct->size - offset);
+	}
+
+	return els;
 }
 static inline ffi_type *psi_ffi_decl_type(decl_type *type) {
-	return psi_ffi_type(real_decl_type(type)->type);
+	decl_type *real = real_decl_type(type);
+
+	switch (real->type) {
+	case PSI_T_STRUCT:
+		if (!real->strct->engine.type) {
+			ffi_type *strct = calloc(1, sizeof(ffi_type));
+
+			strct->type = FFI_TYPE_STRUCT;
+			strct->size = 0;
+			strct->elements = psi_ffi_struct_type_elements(real->strct);
+
+			real->strct->engine.type = strct;
+			real->strct->engine.dtor = psi_ffi_struct_type_dtor;
+		}
+
+		return real->strct->engine.type;
+
+	case PSI_T_UNION:
+		return psi_ffi_decl_arg_type(real->unn->args->args[0]);
+
+	default:
+		return psi_ffi_token_type(real->type);
+	}
 }
 static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg) {
 	if (darg->var->pointer_level) {
@@ -100,70 +225,65 @@ static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg) {
 typedef struct PSI_LibffiContext {
 	ffi_cif signature;
 	ffi_type *params[2];
-	struct {
-		struct PSI_LibffiData **list;
-		size_t count;
-	} data;
 } PSI_LibffiContext;
 
-typedef struct PSI_LibffiData {
-	PSI_LibffiContext *context;
-	impl *impl;
-	zend_internal_arg_info *arginfo;
+typedef struct PSI_LibffiCall {
 	void *code;
 	ffi_closure *closure;
 	ffi_cif signature;
-	ffi_type *params[1];
-} PSI_LibffiData;
+	void *params[1]; /* [type1, type2, NULL, arg1, arg2] ... */
+} PSI_LibffiCall;
 
-static inline PSI_LibffiData *PSI_LibffiDataAlloc(PSI_LibffiContext *context, impl *impl) {
-	ffi_status rc;
-	size_t i, c = impl->decl->args ? impl->decl->args->count : 0;
-	PSI_LibffiData *data = malloc(sizeof(*data) + c * sizeof(ffi_type *));
+static inline PSI_LibffiCall *PSI_LibffiCallAlloc(PSI_Context *C, decl *decl) {
+	int rc;
+	size_t i, c = decl->args ? decl->args->count : 0;
+	PSI_LibffiCall *call = calloc(1, sizeof(*call) + 2 * c * sizeof(void *));
 
-	data->context = context;
-	data->impl = impl;
-	data->arginfo = psi_internal_arginfo(impl);
 	for (i = 0; i < c; ++i) {
-		data->params[i] = psi_ffi_decl_arg_type(impl->decl->args->args[i]);
+		call->params[i] = psi_ffi_decl_arg_type(decl->args->args[i]);
 	}
-	data->params[c] = NULL;
-
-	rc = ffi_prep_cif(
-			&data->signature,
-			psi_ffi_abi(data->impl->decl->abi->convention),
-			c,
-			psi_ffi_decl_arg_type(data->impl->decl->func),
-			data->params);
+	call->params[c] = NULL;
+
+	decl->call.info = call;
+	decl->call.rval = &decl->func->ptr;
+	decl->call.argc = c;
+	decl->call.args = (void **) &call->params[c+1];
+
+	rc = ffi_prep_cif(&call->signature, psi_ffi_abi(decl->abi->convention),
+			c, psi_ffi_decl_arg_type(decl->func), (ffi_type **) call->params);
 	ZEND_ASSERT(FFI_OK == rc);
 
-	data->closure = psi_ffi_closure_alloc(sizeof(ffi_closure), &data->code);
-	ZEND_ASSERT(data->closure != NULL);
+	return call;
+}
+
+static inline void PSI_LibffiCallInitClosure(PSI_Context *C, PSI_LibffiCall *call, impl *impl) {
+	PSI_LibffiContext *context = C->context;
+	int rc;
+
+	call->closure = psi_ffi_closure_alloc(sizeof(ffi_closure), &call->code);
+	ZEND_ASSERT(call->closure != NULL);
+
 #if PSI_HAVE_FFI_PREP_CLOSURE_LOC
 	rc = ffi_prep_closure_loc(
-			data->closure,
+			call->closure,
 			&context->signature,
 			psi_ffi_handler,
-			data,
-			data->code);
-	ZEND_ASSERT(FFI_OK == rc);
+			impl,
+			call->code);
+
 #elif PSI_HAVE_FFI_PREP_CLOSURE
-	rc = ffi_prep_closure(data->code, &context->signature, psi_ffi_handler, data);
-	ZEND_ASSERT(FFI_OK == rc);
+	rc = ffi_prep_closure(call->code, &context->signature, psi_ffi_handler, impl);
 #else
 # error "Neither ffi_prep_closure() nor ffi_prep_closure_loc() available"
 #endif
-
-	context->data.list = realloc(context->data.list, ++context->data.count * sizeof(*context->data.list));
-	context->data.list[context->data.count-1] = data;
-
-	return data;
+	ZEND_ASSERT(FFI_OK == rc);
 }
 
-static inline void PSI_LibffiDataFree(PSI_LibffiData *data) {
-	psi_ffi_closure_free(data->closure);
-	free(data->arginfo);
-	free(data);
+static inline void PSI_LibffiCallFree(PSI_LibffiCall *call) {
+	if (call->closure) {
+		psi_ffi_closure_free(call->closure);
+	}
+	free(call);
 }
 
 static inline PSI_LibffiContext *PSI_LibffiContextInit(PSI_LibffiContext *L) {
@@ -182,69 +302,9 @@ static inline PSI_LibffiContext *PSI_LibffiContextInit(PSI_LibffiContext *L) {
 	return L;
 }
 
-static inline void PSI_LibffiContextDtor(PSI_LibffiContext *L) {
-	size_t i;
-
-	for (i = 0; i < L->data.count; ++i) {
-		PSI_LibffiDataFree(L->data.list[i]);
-	}
-	if (L->data.list) {
-		free(L->data.list);
-	}
-}
-
-static inline void PSI_LibffiContextFree(PSI_LibffiContext **L) {
-	if (*L) {
-		PSI_LibffiContextDtor(*L);
-		free(*L);
-		*L = NULL;
-	}
-}
-
 static void psi_ffi_handler(ffi_cif *_sig, void *_result, void **_args, void *_data)
 {
-	PSI_LibffiData *data = _data;
-	size_t i;
-	void **arg_prm = NULL;
-	impl_val ret_val;
-
-	if (SUCCESS != psi_parse_args(*(zend_execute_data **)_args[0], data->impl)) {
-		return;
-	}
-
-	if (data->impl->decl->args) {
-		arg_prm = malloc(data->impl->decl->args->count * sizeof(*arg_prm));
-
-		for (i = 0; i < data->impl->decl->args->count; ++i) {
-			decl_arg *darg = data->impl->decl->args->args[i];
-
-			arg_prm[i] = psi_do_let(darg);
-		}
-	}
-
-	ffi_call(&data->signature, FFI_FN(data->impl->decl->dlptr), &ret_val, arg_prm);
-
-	psi_do_return(*(zval **)_args[1], data->impl->stmts->ret.list[0], &ret_val);
-
-	for (i = 0; i < data->impl->stmts->set.count; ++i) {
-		set_stmt *set = data->impl->stmts->set.list[i];
-
-		if (set->arg->_zv) {
-			psi_do_set(set->arg->_zv, set->val);
-		}
-	}
-
-	for (i = 0; i < data->impl->stmts->fre.count; ++i) {
-		free_stmt *fre = data->impl->stmts->fre.list[i];
-
-		psi_do_free(fre);
-	}
-
-	psi_do_clean(data->impl);
-
-	if (arg_prm) {
-		free(arg_prm);
-	}
+	psi_call(*(zend_execute_data **)_args[0], *(zval **)_args[1], _data);
 }
 
 static void psi_ffi_init(PSI_Context *C)
@@ -254,14 +314,24 @@ static void psi_ffi_init(PSI_Context *C)
 
 static void psi_ffi_dtor(PSI_Context *C)
 {
-	PSI_LibffiContextFree((void *) &C->context);
+	if (C->decls) {
+		size_t i;
+
+		for (i = 0; i < C->decls->count; ++i) {
+			decl *decl = C->decls->list[i];
+
+			if (decl->call.info) {
+				PSI_LibffiCallFree(decl->call.info);
+			}
+		}
+	}
+	free(C->context);
 }
 
 static zend_function_entry *psi_ffi_compile(PSI_Context *C)
 {
 	size_t i, j = 0;
 	zend_function_entry *zfe;
-	PSI_LibffiContext *ctx = C->context;
 
 	if (!C->impls) {
 		return NULL;
@@ -270,46 +340,68 @@ static zend_function_entry *psi_ffi_compile(PSI_Context *C)
 	zfe = calloc(C->impls->count + 1, sizeof(*zfe));
 	for (i = 0; i < C->impls->count; ++i) {
 		zend_function_entry *zf = &zfe[j];
-		PSI_LibffiData *data;
+		PSI_LibffiCall *call;
+		impl *impl = C->impls->list[i];
 
-		if (!C->impls->list[i]->decl) {
+		if (!impl->decl) {
 			continue;
 		}
 
-		data = PSI_LibffiDataAlloc(ctx, C->impls->list[i]);
-		zf->fname = C->impls->list[i]->func->name + (C->impls->list[i]->func->name[0] == '\\');
-		zf->num_args = C->impls->list[i]->func->args->count;
-		zf->handler = data->code;
-		zf->arg_info = data->arginfo;
+		call = PSI_LibffiCallAlloc(C, impl->decl);
+		PSI_LibffiCallInitClosure(C, call, impl);
+
+		zf->fname = impl->func->name + (impl->func->name[0] == '\\');
+		zf->num_args = impl->func->args->count;
+		zf->handler = call->code;
+		zf->arg_info = psi_internal_arginfo(impl);
 		++j;
 	}
 
-	return zfe;
-}
+	for (i = 0; i < C->decls->count; ++i) {
+		decl *decl = C->decls->list[i];
 
-static void psi_ffi_call(PSI_Context *C, impl_val *ret_val, decl *decl, impl_val **args) {
-	ffi_cif signature;
-	ffi_type **types;
-	void **argps;
-	size_t i;
+		if (decl->impl) {
+			continue;
+		}
 
-	/* FIXME: cache in decl */
+		PSI_LibffiCallAlloc(C, decl);
+	}
 
-	types = calloc(decl->args->count + 1, sizeof(*types));
-	argps = calloc(decl->args->count + 1, sizeof(*argps));
-	for (i = 0; i < decl->args->count; ++i) {
-		decl_arg *darg = decl->args->args[i];
+	return zfe;
+}
 
-		types[i] = psi_ffi_decl_arg_type(darg);
-		argps[i] = args[i];
-	}
+static void psi_ffi_call(PSI_Context *C, decl_callinfo *decl_call, impl_vararg *va) {
+	PSI_LibffiCall *call = decl_call->info;
 
-	ffi_prep_cif(&signature, psi_ffi_abi(decl->abi->convention), decl->args->count,
-			psi_ffi_decl_arg_type(decl->func), types);
-	ffi_call(&signature, FFI_FN(decl->dlptr), ret_val, argps);
+	if (va) {
+		ffi_status rc;
+		ffi_cif signature;
+		size_t i, nfixedargs = decl_call->argc, ntotalargs = nfixedargs + va->args->count;
+		void **params = calloc(2 * ntotalargs + 2, sizeof(void *));
 
-	free(types);
-	free(argps);
+		for (i = 0; i < nfixedargs; ++i) {
+			params[i] = call->params[i];
+			params[i + ntotalargs + 1] = call->params[i + nfixedargs + 1];
+		}
+		for (i = 0; i < va->args->count; ++i) {
+			params[nfixedargs + i] = psi_ffi_impl_type(va->types[i]);
+			params[nfixedargs + i + ntotalargs + 1] = &va->values[i];
+		}
+#ifdef PSI_HAVE_FFI_PREP_CIF_VAR
+		rc = ffi_prep_cif_var(&signature, call->signature.abi,
+				nfixedargs, ntotalargs,
+				call->signature.rtype, (ffi_type **) params);
+#else
+		/* FIXME: test in config.m4; assume we can just call anyway */
+		rc = ffi_prep_cif(&signature, call->signature.abi, ntotalargs,
+				call->signature.rtype, (ffi_type **) params);
+#endif
+		ZEND_ASSERT(FFI_OK == rc);
+		ffi_call(&signature, FFI_FN(decl_call->sym), *decl_call->rval, &params[ntotalargs + 1]);
+		free(params);
+	} else {
+		ffi_call(&call->signature, FFI_FN(decl_call->sym), *decl_call->rval, decl_call->args);
+	}
 }
 
 static PSI_ContextOps ops = {
@@ -323,3 +415,5 @@ PSI_ContextOps *PSI_Libffi(void)
 {
 	return &ops;
 }
+
+#endif /* HAVE_LIBFFI */