| /* |
| * Copyright (c) 2008-2010 Wayne Meissner |
| * |
| * Copyright (c) 2008-2013, Ruby FFI project contributors |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of the Ruby FFI project nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <sys/types.h> |
| #include <stdio.h> |
| #ifndef _MSC_VER |
| # include <stdint.h> |
| #endif |
| #if (defined(_WIN32) || defined(__WIN32__)) && !defined(__CYGWIN__) |
| # include <winsock2.h> |
| # define _WINSOCKAPI_ |
| # include <windows.h> |
| # include <shlwapi.h> |
| #else |
| # include <dlfcn.h> |
| #endif |
| #include <ruby.h> |
| #if defined(_MSC_VER) && !defined(INT8_MIN) |
| # include "win32/stdint.h" |
| #endif |
| |
| #include <ffi.h> |
| |
| #include "rbffi.h" |
| #include "compat.h" |
| #include "AbstractMemory.h" |
| #include "Pointer.h" |
| #include "DynamicLibrary.h" |
| |
| typedef struct LibrarySymbol_ { |
| Pointer base; |
| VALUE library; |
| VALUE name; |
| } LibrarySymbol; |
| |
| static VALUE library_initialize(VALUE self, VALUE libname, VALUE libflags); |
| static void library_free(Library* lib); |
| |
| |
| static VALUE symbol_allocate(VALUE klass); |
| static VALUE symbol_new(VALUE library, void* address, VALUE name); |
| static void symbol_mark(LibrarySymbol* sym); |
| |
| static VALUE LibraryClass = Qnil, SymbolClass = Qnil; |
| |
| #if (defined(_WIN32) || defined(__WIN32__)) && !defined(__CYGWIN__) |
| static void* dl_open(const char* name, int flags); |
| static void dl_error(char* buf, int size); |
| #define dl_sym(handle, name) GetProcAddress(handle, name) |
| #define dl_close(handle) FreeLibrary(handle) |
| #else |
| # define dl_open(name, flags) dlopen(name, flags != 0 ? flags : RTLD_LAZY) |
| # define dl_error(buf, size) do { snprintf(buf, size, "%s", dlerror()); } while(0) |
| # define dl_sym(handle, name) dlsym(handle, name) |
| # define dl_close(handle) dlclose(handle) |
| #endif |
| |
| static VALUE |
| library_allocate(VALUE klass) |
| { |
| Library* library; |
| return Data_Make_Struct(klass, Library, NULL, library_free, library); |
| } |
| |
| /* |
| * call-seq: DynamicLibrary.open(libname, libflags) |
| * @param libname (see #initialize) |
| * @param libflags (see #initialize) |
| * @return [FFI::DynamicLibrary] |
| * @raise {LoadError} if +libname+ cannot be opened |
| * Open a library. |
| */ |
| static VALUE |
| library_open(VALUE klass, VALUE libname, VALUE libflags) |
| { |
| return library_initialize(library_allocate(klass), libname, libflags); |
| } |
| |
| /* |
| * call-seq: initialize(libname, libflags) |
| * @param [String] libname name of library to open |
| * @param [Fixnum] libflags flags for library to open |
| * @return [FFI::DynamicLibrary] |
| * @raise {LoadError} if +libname+ cannot be opened |
| * A new DynamicLibrary instance. |
| */ |
| static VALUE |
| library_initialize(VALUE self, VALUE libname, VALUE libflags) |
| { |
| Library* library; |
| int flags; |
| |
| Check_Type(libflags, T_FIXNUM); |
| |
| Data_Get_Struct(self, Library, library); |
| flags = libflags != Qnil ? NUM2UINT(libflags) : 0; |
| |
| library->handle = dl_open(libname != Qnil ? StringValueCStr(libname) : NULL, flags); |
| if (library->handle == NULL) { |
| char errmsg[1024]; |
| dl_error(errmsg, sizeof(errmsg)); |
| rb_raise(rb_eLoadError, "Could not open library '%s': %s", |
| libname != Qnil ? StringValueCStr(libname) : "[current process]", |
| errmsg); |
| } |
| #ifdef __CYGWIN__ |
| // On Cygwin 1.7.17 "dlsym(dlopen(0,0), 'getpid')" fails. (dlerror: "No such process") |
| // As a workaround we can use "dlsym(RTLD_DEFAULT, 'getpid')" instead. |
| // Since 0 == RTLD_DEFAULT we won't call dl_close later. |
| if (libname == Qnil) { |
| dl_close(library->handle); |
| library->handle = RTLD_DEFAULT; |
| } |
| #endif |
| rb_iv_set(self, "@name", libname != Qnil ? libname : rb_str_new2("[current process]")); |
| return self; |
| } |
| |
| static VALUE |
| library_dlsym(VALUE self, VALUE name) |
| { |
| Library* library; |
| void* address = NULL; |
| Check_Type(name, T_STRING); |
| |
| Data_Get_Struct(self, Library, library); |
| address = dl_sym(library->handle, StringValueCStr(name)); |
| |
| return address != NULL ? symbol_new(self, address, name) : Qnil; |
| } |
| |
| /* |
| * call-seq: last_error |
| * @return [String] library's last error string |
| */ |
| static VALUE |
| library_dlerror(VALUE self) |
| { |
| char errmsg[1024]; |
| dl_error(errmsg, sizeof(errmsg)); |
| return rb_tainted_str_new2(errmsg); |
| } |
| |
| static void |
| library_free(Library* library) |
| { |
| /* dlclose() on MacOS tends to segfault - avoid it */ |
| #ifndef __APPLE__ |
| if (library->handle != NULL) { |
| dl_close(library->handle); |
| } |
| #endif |
| xfree(library); |
| } |
| |
| #if (defined(_WIN32) || defined(__WIN32__)) && !defined(__CYGWIN__) |
| static void* |
| dl_open(const char* name, int flags) |
| { |
| if (name == NULL) { |
| return GetModuleHandle(NULL); |
| } else { |
| DWORD dwFlags = PathIsRelativeA(name) ? 0 : LOAD_WITH_ALTERED_SEARCH_PATH; |
| return LoadLibraryExA(name, NULL, dwFlags); |
| } |
| } |
| |
| static void |
| dl_error(char* buf, int size) |
| { |
| FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), |
| 0, buf, size, NULL); |
| } |
| #endif |
| |
| static VALUE |
| symbol_allocate(VALUE klass) |
| { |
| LibrarySymbol* sym; |
| VALUE obj = Data_Make_Struct(klass, LibrarySymbol, NULL, -1, sym); |
| sym->name = Qnil; |
| sym->library = Qnil; |
| sym->base.rbParent = Qnil; |
| |
| return obj; |
| } |
| |
| |
| /* |
| * call-seq: initialize_copy(other) |
| * @param [Object] other |
| * @return [nil] |
| * DO NOT CALL THIS METHOD |
| */ |
| static VALUE |
| symbol_initialize_copy(VALUE self, VALUE other) |
| { |
| rb_raise(rb_eRuntimeError, "cannot duplicate symbol"); |
| return Qnil; |
| } |
| |
| static VALUE |
| symbol_new(VALUE library, void* address, VALUE name) |
| { |
| LibrarySymbol* sym; |
| VALUE obj = Data_Make_Struct(SymbolClass, LibrarySymbol, symbol_mark, -1, sym); |
| |
| sym->base.memory.address = address; |
| sym->base.memory.size = LONG_MAX; |
| sym->base.memory.typeSize = 1; |
| sym->base.memory.flags = MEM_RD | MEM_WR; |
| sym->library = library; |
| sym->name = name; |
| |
| return obj; |
| } |
| |
| static void |
| symbol_mark(LibrarySymbol* sym) |
| { |
| rb_gc_mark(sym->library); |
| rb_gc_mark(sym->name); |
| } |
| |
| /* |
| * call-seq: inspect |
| * @return [String] |
| * Inspect. |
| */ |
| static VALUE |
| symbol_inspect(VALUE self) |
| { |
| LibrarySymbol* sym; |
| char buf[256]; |
| |
| Data_Get_Struct(self, LibrarySymbol, sym); |
| snprintf(buf, sizeof(buf), "#<FFI::Library::Symbol name=%s address=%p>", |
| StringValueCStr(sym->name), sym->base.memory.address); |
| return rb_str_new2(buf); |
| } |
| |
| void |
| rbffi_DynamicLibrary_Init(VALUE moduleFFI) |
| { |
| /* |
| * Document-class: FFI::DynamicLibrary |
| */ |
| LibraryClass = rb_define_class_under(moduleFFI, "DynamicLibrary", rb_cObject); |
| rb_global_variable(&LibraryClass); |
| /* |
| * Document-class: FFI::DynamicLibrary::Symbol < FFI::Pointer |
| * |
| * An instance of this class represents a library symbol. It may be a {Pointer pointer} to |
| * a function or to a variable. |
| */ |
| SymbolClass = rb_define_class_under(LibraryClass, "Symbol", rbffi_PointerClass); |
| rb_global_variable(&SymbolClass); |
| |
| /* |
| * Document-const: FFI::NativeLibrary |
| * Backward compatibility for FFI::DynamicLibrary |
| */ |
| rb_define_const(moduleFFI, "NativeLibrary", LibraryClass); /* backwards compat library */ |
| rb_define_alloc_func(LibraryClass, library_allocate); |
| rb_define_singleton_method(LibraryClass, "open", library_open, 2); |
| rb_define_singleton_method(LibraryClass, "last_error", library_dlerror, 0); |
| rb_define_method(LibraryClass, "initialize", library_initialize, 2); |
| /* |
| * Document-method: find_symbol |
| * call-seq: find_symbol(name) |
| * @param [String] name library symbol's name |
| * @return [FFI::DynamicLibrary::Symbol] library symbol |
| */ |
| rb_define_method(LibraryClass, "find_symbol", library_dlsym, 1); |
| /* |
| * Document-method: find_function |
| * call-seq: find_function(name) |
| * @param [String] name library function's name |
| * @return [FFI::DynamicLibrary::Symbol] library function symbol |
| */ |
| rb_define_method(LibraryClass, "find_function", library_dlsym, 1); |
| /* |
| * Document-method: find_variable |
| * call-seq: find_variable(name) |
| * @param [String] name library variable's name |
| * @return [FFI::DynamicLibrary::Symbol] library variable symbol |
| */ |
| rb_define_method(LibraryClass, "find_variable", library_dlsym, 1); |
| rb_define_method(LibraryClass, "last_error", library_dlerror, 0); |
| rb_define_attr(LibraryClass, "name", 1, 0); |
| |
| rb_define_alloc_func(SymbolClass, symbol_allocate); |
| rb_undef_method(SymbolClass, "new"); |
| rb_define_method(SymbolClass, "inspect", symbol_inspect, 0); |
| rb_define_method(SymbolClass, "initialize_copy", symbol_initialize_copy, 1); |
| |
| #define DEF(x) rb_define_const(LibraryClass, "RTLD_" #x, UINT2NUM(RTLD_##x)) |
| DEF(LAZY); |
| DEF(NOW); |
| DEF(GLOBAL); |
| DEF(LOCAL); |
| DEF(NOLOAD); |
| DEF(NODELETE); |
| DEF(FIRST); |
| DEF(DEEPBIND); |
| DEF(MEMBER); |
| DEF(BINDING_MASK); |
| DEF(LOCATION_MASK); |
| DEF(ALL_MASK); |
| #undef DEF |
| |
| } |
| |