X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=src%2Flibffi.c;h=514394f4047f506650473e367a724a7c729d4d8b;hp=eb5b2b518aa800bf8f9922d50cdd1d66e833785c;hb=70f215a31fab4be1fe3e80125eb401e11eb02b9f;hpb=f6b2422d4a9cb0424412a4077241cfd5bcb9ebeb

diff --git a/src/libffi.c b/src/libffi.c
index eb5b2b5..514394f 100644
--- a/src/libffi.c
+++ b/src/libffi.c
@@ -1,6 +1,21 @@
+#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
+#undef PACKAGE_NAME
+#undef PACKAGE_STRING
+#undef PACKAGE_TARNAME
+#undef PACKAGE_VERSION
 
 #include <ffi.h>
 
@@ -10,6 +25,9 @@
 # endif
 # if HAVE_SYS_MMAN_H
 #  include <sys/mman.h>
+#  ifndef MAP_ANONYMOUS
+#   define MAP_ANONYMOUS MAP_ANON
+#  endif
 # endif
 #endif
 
@@ -25,10 +43,25 @@ static void *psi_ffi_closure_alloc(size_t s, void **code)
 	}
 	return *code;
 #else
-	return NULL;
+# error "Neither ffi_closure_alloc() nor mmap() available"
 #endif
 }
 
+static ffi_status psi_ffi_prep_closure(ffi_closure **closure, void **code, ffi_cif *sig, void (*handler)(ffi_cif*,void*,void**,void*), void *data) {
+	*closure = psi_ffi_closure_alloc(sizeof(ffi_closure), code);
+	ZEND_ASSERT(*closure != NULL);
+
+#if PSI_HAVE_FFI_PREP_CLOSURE_LOC
+	return ffi_prep_closure_loc(*closure, sig, handler, data, *code);
+
+#elif PSI_HAVE_FFI_PREP_CLOSURE
+	return ffi_prep_closure(*code, sig, handler, data);
+#else
+# error "Neither ffi_prep_closure() nor ffi_prep_closure_loc() is available"
+#endif
+
+}
+
 static void psi_ffi_closure_free(void *c)
 {
 #ifdef PSI_HAVE_FFI_CLOSURE_ALLOC
@@ -38,41 +71,143 @@ static void psi_ffi_closure_free(void *c)
 #endif
 }
 
-static void handler(ffi_cif *signature, void *_result, void **_args, void *_data);
+static void psi_ffi_handler(ffi_cif *_sig, void *_result, void **_args, void *_data)
+{
+	psi_call(*(zend_execute_data **)_args[0], *(zval **)_args[1], _data);
+}
+
+static void psi_ffi_callback(ffi_cif *_sig, void *_result, void **_args, void *_data)
+{
+	size_t i;
+	unsigned argc = _sig->nargs;
+	void **argv = _args;
+	let_callback *cb = _data;
+	decl *decl_cb = cb->decl;
+	impl_arg *iarg = cb->func->var->arg;
+	zval return_value, *zargv = calloc(argc, sizeof(*zargv));
+	void *result, *to_free = NULL;
+
+	ZEND_ASSERT(argc == cb->decl->args->count);
+
+	/* prepare args for the userland call */
+	for (i = 0; i < argc; ++i) {
+		cb->decl->args->args[i]->ptr = argv[i];
+	}
+	for (i = 0; i < cb->args->count; ++i) {
+		psi_do_set(&zargv[i], cb->args->vals[i]);
+	}
+	zend_fcall_info_argp(&iarg->val.zend.cb->fci, cb->args->count, zargv);
+
+	/* callback into userland */
+	ZVAL_UNDEF(&return_value);
+	iarg->_zv = &return_value;
+	zend_fcall_info_call(&iarg->val.zend.cb->fci, &iarg->val.zend.cb->fcc, iarg->_zv, NULL);
+
+	/* marshal return value of the userland call */
+	switch (iarg->type->type) {
+	case PSI_T_BOOL:	zend_parse_arg_bool(iarg->_zv, &iarg->val.zend.bval, NULL, 0);		break;
+	case PSI_T_LONG:	zend_parse_arg_long(iarg->_zv, &iarg->val.zend.lval, NULL, 0, 1);	break;
+	case PSI_T_FLOAT:
+	case PSI_T_DOUBLE:	zend_parse_arg_double(iarg->_zv, &iarg->val.dval, NULL, 0);			break;
+	case PSI_T_STRING:	zend_parse_arg_str(iarg->_zv, &iarg->val.zend.str, 0);				break;
+	}
+	result = cb->func->handler(_result, decl_cb->func->type, iarg, &to_free);
+
+	if (result != _result) {
+		*(void **)_result = result;
+	}
+
+	zend_fcall_info_args_clear(&iarg->val.zend.cb->fci, 0);
+	for (i = 0; i < cb->args->count; ++i) {
+		zval_ptr_dtor(&zargv[i]);
+	}
+	free(zargv);
+}
+
+static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg);
+
+typedef struct PSI_LibffiContext {
+	ffi_cif signature;
+	ffi_type *params[2];
+} PSI_LibffiContext;
+
+typedef struct PSI_LibffiCall {
+	void *code;
+	ffi_closure *closure;
+	ffi_cif signature;
+	void *params[1]; /* [type1, type2, NULL, arg1, arg2] ... */
+} PSI_LibffiCall;
 
 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 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 *));
+
+	for (i = 0; i < c; ++i) {
+		call->params[i] = psi_ffi_decl_arg_type(decl->args->args[i]);
+	}
+	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);
+
+	return call;
+}
+
+static inline ffi_status PSI_LibffiCallInitClosure(PSI_Context *C, PSI_LibffiCall *call, impl *impl) {
+	PSI_LibffiContext *context = C->context;
+
+	return psi_ffi_prep_closure(&call->closure, &call->code, &context->signature, psi_ffi_handler, impl);
+}
+
+static inline ffi_status PSI_LibffiCallInitCallbackClosure(PSI_Context *C, PSI_LibffiCall *call, let_callback *cb) {
+	return psi_ffi_prep_closure(&call->closure, &call->code, &call->signature, psi_ffi_callback, cb);
+}
+
+static inline void PSI_LibffiCallFree(PSI_LibffiCall *call) {
+	if (call->closure) {
+		psi_ffi_closure_free(call->closure);
+	}
+	free(call);
+}
+
+static inline ffi_type *psi_ffi_token_type(token_t t) {
 	switch (t) {
 	default:
 		ZEND_ASSERT(0);
 		/* no break */
 	case PSI_T_VOID:
 		return &ffi_type_void;
-	case PSI_T_SINT8:
+	case PSI_T_INT8:
 		return &ffi_type_sint8;
 	case PSI_T_UINT8:
 		return &ffi_type_uint8;
-	case PSI_T_SINT16:
+	case PSI_T_INT16:
 		return &ffi_type_sint16;
 	case PSI_T_UINT16:
 		return &ffi_type_uint16;
-	case PSI_T_SINT32:
+	case PSI_T_INT32:
 		return &ffi_type_sint32;
 	case PSI_T_UINT32:
 		return &ffi_type_uint32;
-	case PSI_T_SINT64:
+	case PSI_T_INT64:
 		return &ffi_type_sint64;
 	case PSI_T_UINT64:
 		return &ffi_type_uint64;
 	case PSI_T_BOOL:
 		return &ffi_type_uchar;
-	case PSI_T_CHAR:
-		return &ffi_type_schar;
-	case PSI_T_SHORT:
-		return &ffi_type_sshort;
 	case PSI_T_INT:
+	case PSI_T_ENUM:
 		return &ffi_type_sint;
 	case PSI_T_LONG:
 		return &ffi_type_slong;
@@ -80,88 +215,137 @@ static inline ffi_type *psi_ffi_type(token_t t) {
 		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:
+	case PSI_T_FUNCTION:
+		return &ffi_type_pointer;
 	}
 }
-static inline ffi_type *psi_ffi_decl_type(decl_type *type) {
-	return psi_ffi_type(real_decl_type(type)->type);
-}
-static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg) {
-	if (darg->var->pointer_level) {
+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;
-	} else {
-		return psi_ffi_decl_type(darg->type);
+	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;
 
-typedef struct PSI_LibffiContext {
-	ffi_cif signature;
-	ffi_type *params[2];
-	struct {
-		struct PSI_LibffiData **list;
-		size_t count;
-	} data;
-} PSI_LibffiContext;
+	if (strct->elements) {
+		ffi_type **ptr;
 
-typedef struct PSI_LibffiData {
-	PSI_LibffiContext *context;
-	impl *impl;
-	zend_internal_arg_info *arginfo;
-	void *code;
-	ffi_closure *closure;
-	ffi_cif signature;
-	ffi_type *params[1];
-} PSI_LibffiData;
+		for (ptr = strct->elements; *ptr; ++ptr) {
+			free(*ptr);
+		}
+		free(strct->elements);
+	}
+	free(strct);
+}
 
-static inline PSI_LibffiData *PSI_LibffiDataAlloc(PSI_LibffiContext *context, impl *impl) {
-	ffi_status rc;
-	size_t i, c = impl->decl->args->count;
-	PSI_LibffiData *data = malloc(sizeof(*data) + c * sizeof(ffi_type *));
+static size_t psi_ffi_struct_type_pad(ffi_type **els, size_t padding) {
+	size_t i;
 
-	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]);
+	for (i = 0; i < padding; ++i) {
+		ffi_type *pad = malloc(sizeof(*pad));
+
+		memcpy(pad, &ffi_type_schar, sizeof(*pad));
+		*els++ = pad;
 	}
-	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);
-	ZEND_ASSERT(FFI_OK == rc);
 
-	data->closure = psi_ffi_closure_alloc(sizeof(ffi_closure), &data->code);
-	ZEND_ASSERT(data->closure != NULL);
-#if PSI_HAVE_FFI_PREP_CLOSURE_LOC
-	rc = ffi_prep_closure_loc(
-			data->closure,
-			&context->signature,
-			handler,
-			data,
-			data->code);
-	ZEND_ASSERT(FFI_OK == rc);
-#elif PSI_HAVE_FFI_PREP_CLOSURE
-	rc = ffi_prep_closure(data->code, &context->signature, handler, data);
-	ZEND_ASSERT(FFI_OK == rc);
-#else
-# error "Neither ffi_prep_closure() nor ffi_prep_closure_loc() available"
-#endif
+	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));
 
-	context->data.list = realloc(context->data.list, ++context->data.count * sizeof(*context->data.list));
-	context->data.list[context->data.count-1] = data;
+	for (i = 0; i < strct->args->count; ++i) {
+		decl_arg *darg = strct->args->args[i];
+		ffi_type *type = malloc(sizeof(*type));
+		size_t padding;
 
-	return data;
+		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) {
+	decl_type *real = real_decl_type(type);
+
+	switch (real->type) {
+	case PSI_T_FUNCTION:
+		return &ffi_type_pointer;
 
-static inline void PSI_LibffiDataFree(PSI_LibffiData *data) {
-	psi_ffi_closure_free(data->closure);
-	free(data->arginfo);
-	free(data);
+	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) {
+		return &ffi_type_pointer;
+	} else {
+		return psi_ffi_decl_type(darg->type);
+	}
 }
 
+
 static inline PSI_LibffiContext *PSI_LibffiContextInit(PSI_LibffiContext *L) {
 	ffi_status rc;
 
@@ -178,118 +362,155 @@ 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_init(PSI_Context *C)
+{
+	C->context = PSI_LibffiContextInit(NULL);
 }
 
-static void handler(ffi_cif *_sig, void *_result, void **_args, void *_data)
+static void psi_ffi_dtor(PSI_Context *C)
 {
-	PSI_LibffiData *data = _data;
-	size_t i;
-	void **arg_ptr = NULL, **arg_prm = NULL;
-	impl_val ret_val;
+	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);
+			}
+		}
 
-	if (SUCCESS != psi_parse_args(*(zend_execute_data **)_args[0], data->impl)) {
-		return;
 	}
+	if (C->impls) {
+		size_t i, j;
 
-	if (data->impl->decl->args->count) {
-		arg_ptr = malloc(data->impl->decl->args->count * sizeof(*arg_ptr));
-		arg_prm = malloc(data->impl->decl->args->count * sizeof(*arg_prm));
+		for (i = 0; i < C->impls->count; ++i) {
+			impl *impl = C->impls->list[i];
 
-		for (i = 0; i < data->impl->decl->args->count; ++i) {
-			decl_arg *darg = data->impl->decl->args->args[i];
+			for (j = 0; j < impl->stmts->let.count; ++j) {
+				let_stmt *let = impl->stmts->let.list[j];
 
-			arg_ptr[i] = psi_do_let(darg);
-			arg_prm[i] = darg->let->val->is_reference ? &arg_ptr[i] : arg_ptr[i];
+				if (let->val && let->val->kind == PSI_LET_CALLBACK) {
+					let_callback *cb = let->val->data.callback;
 
-			darg->let->ptr = arg_ptr[i];
+					if (cb->decl && cb->decl->call.info) {
+						PSI_LibffiCallFree(cb->decl->call.info);
+					}
+				}
+			}
 		}
 	}
+	free(C->context);
+}
 
-	ffi_call(&data->signature, FFI_FN(data->impl->decl->dlptr), &ret_val, arg_prm);
-
-	psi_do_return(data->impl, &ret_val, *(zval **)_args[1]);
-
-	for (i = 0; i < data->impl->stmts->set.count; ++i) {
-		set_stmt *set = data->impl->stmts->set.list[i];
+static zend_function_entry *psi_ffi_compile(PSI_Context *C)
+{
+	size_t c, i, j = 0;
+	zend_function_entry *zfe;
 
-		psi_do_set(set->arg->_zv, set->val->func, set->val->vars);
+	if (!C->impls) {
+		return NULL;
 	}
 
-	for (i = 0; i < data->impl->stmts->fre.count; ++i) {
-		free_stmt *fre = data->impl->stmts->fre.list[i];
+	zfe = calloc(C->impls->count + 1, sizeof(*zfe));
+	for (i = 0; i < C->impls->count; ++i) {
+		zend_function_entry *zf = &zfe[j];
+		PSI_LibffiCall *call;
+		impl *impl = C->impls->list[i];
 
-		psi_do_free(fre);
-	}
+		if (!impl->decl) {
+			continue;
+		}
 
-	psi_do_clean(data->impl);
+		call = PSI_LibffiCallAlloc(C, impl->decl);
+		if (FFI_OK != PSI_LibffiCallInitClosure(C, call, impl)) {
+			PSI_LibffiCallFree(call);
+			continue;
+		}
 
-	if (arg_ptr) {
-		free(arg_ptr);
-	}
-	if (arg_prm) {
-		free(arg_prm);
-	}
-}
+		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;
 
-static void init(PSI_Context *C)
-{
-	C->context = PSI_LibffiContextInit(NULL);
-}
+		for (c = 0; c < impl->stmts->let.count; ++c) {
+			let_stmt *let = impl->stmts->let.list[c];
 
-static void dtor(PSI_Context *C)
-{
-	PSI_LibffiContextFree((void *) &C->context);
-}
+			if (let->val->kind == PSI_LET_CALLBACK) {
+				let_callback *cb = let->val->data.callback;
 
-static zend_function_entry *compile(PSI_Context *C, PSI_Data *D)
-{
-	size_t i, j = 0;
-	zend_function_entry *zfe = calloc(D->impls->count + 1, sizeof(*zfe));
-	PSI_LibffiContext *ctx = C->context;
+				call = PSI_LibffiCallAlloc(C, cb->decl);
+				if (FFI_OK != PSI_LibffiCallInitCallbackClosure(C, call, cb)) {
+					PSI_LibffiCallFree(call);
+					continue;
+				}
 
-	for (i = 0; i < D->impls->count; ++i) {
-		zend_function_entry *zf = &zfe[j];
-		PSI_LibffiData *data;
+				cb->decl->call.sym = call->code;
+			}
+		}
+	}
 
-		if (!D->impls->list[i]->decl) {
+	for (i = 0; i < C->decls->count; ++i) {
+		decl *decl = C->decls->list[i];
+
+//		if (decl->impl) {
+//			continue;
+//		}
+		if (decl->call.info) {
 			continue;
 		}
 
-		data = PSI_LibffiDataAlloc(ctx, D->impls->list[i]);
-		zf->fname = D->impls->list[i]->func->name + (D->impls->list[i]->func->name[0] == '\\');
-		zf->num_args = D->impls->list[i]->func->args->count;
-		zf->handler = data->code;
-		zf->arg_info = data->arginfo;
-		++j;
+		PSI_LibffiCallAlloc(C, decl);
 	}
 
 	return zfe;
 }
 
+static void psi_ffi_call(PSI_Context *C, decl_callinfo *decl_call, impl_vararg *va) {
+	PSI_LibffiCall *call = decl_call->info;
+
+	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 *));
+
+		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 = {
-	init,
-	dtor,
-	compile,
+	psi_ffi_init,
+	psi_ffi_dtor,
+	psi_ffi_compile,
+	psi_ffi_call,
 };
 
 PSI_ContextOps *PSI_Libffi(void)
 {
 	return &ops;
 }
+
+#endif /* HAVE_LIBFFI */