/*************************************************************************** class_load.c Gambas class loader (c) 2000-2007 Benoit Minisini This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ***************************************************************************/ #define __GBX_CLASS_LOAD_C #include "gb_common.h" #include "gb_common_case.h" #include "gb_common_buffer.h" #include "gb_common_swap.h" #include "gb_alloc.h" #include "gb_error.h" #include "gb_limit.h" #include #include "gb_buffer.h" #include "gb_file.h" #include "gbx_type.h" #include "gbx_exec.h" #include "gbx_debug.h" #include "gb_magic.h" #include "gbx_stream.h" #include "gbx_string.h" #include "gbx_object.h" #include "gbx_variant.h" #include "gbx_number.h" #include "gambas.h" #include "gbx_class.h" //#define DEBUG //#define DEBUG_LOAD 1 //long total = 0; static const char *ClassName; static bool _swap; #define _b "\x1" #define _s "\x2" #define _i "\x3" #define _p "\x4" #define _c "\x5" #define _t "\x6" #ifdef DEBUG static CLASS *Class; static int NSection; #endif static void SWAP_type(CTYPE *p) { SWAP_short(&p->value); } static char *get_section(char *sec_name, char **section, short *pcount, const char *desc) { static void *jump_swap[] = { &&__SWAP_END, &&__SWAP_BYTE, &&__SWAP_SHORT, &&__SWAP_INT, &&__SWAP_POINTER, &&__SWAP_CTYPE, &&__SWAP_TYPE }; static size_t sizeof_32[] = { 0, 1, 2, 4, 4, 4, 4 }; #ifdef OS_64BITS static void *jump_trans[] = { &&__TRANS_END, &&__TRANS_BYTE, &&__TRANS_SHORT, &&__TRANS_INT, &&__TRANS_POINTER, &&__TRANS_CTYPE, &&__TRANS_TYPE }; static size_t sizeof_64[] = { 0, 1, 2, 4, 8, 4, 8 }; #endif char *current = *section + sizeof(int); int section_size = *((int *)(*section)); int i; char *p; const char *pdesc; short size; size_t size_one = 0; #ifdef OS_64BITS size_t size_one_64 = 0; char *alloc = NULL; char *pa = NULL; #endif if (_swap) SWAP_int(§ion_size); #ifdef DEBUG NSection++; printf("Section #%d %s %08lX %d %d\n", NSection + 1, sec_name, (int)(current - (char *)Class->data), one, section_size); #endif *section += section_size + sizeof(int); if (desc) { pdesc = desc; while (*pdesc) { size_one += sizeof_32[(int)*pdesc]; #ifdef OS_64BITS size_one_64 += sizeof_64[(int)*pdesc]; #endif pdesc++; } if (section_size % size_one) THROW(E_CLASS, ClassName, "Bad format in section: ", sec_name); size = section_size / size_one; if (pcount) *pcount = size; if (!size) return NULL; if (_swap) { for (i = 0; i < size; i++) { p = current + i * size_one; pdesc = desc; __SWAP_NEXT: goto *jump_swap[(int)(*pdesc++)]; __SWAP_BYTE: p++; goto __SWAP_NEXT; __SWAP_SHORT: SWAP_short((short *)p); p += sizeof(short); goto __SWAP_NEXT; __SWAP_INT: __SWAP_POINTER: SWAP_int((int *)p); p += sizeof(int); goto __SWAP_NEXT; __SWAP_CTYPE: __SWAP_TYPE: SWAP_type((CTYPE *)p); p += sizeof(CTYPE); goto __SWAP_NEXT; __SWAP_END: continue; } } #ifdef OS_64BITS if (size_one_64 != size_one) { ALLOC(POINTER(&alloc), size_one_64 * size, "get_section"); for (i = 0; i < size; i++) { p = current + i * size_one; pa = alloc + i * size_one_64; pdesc = desc; __TRANS_NEXT: goto *jump_trans[(int)(*pdesc++)]; __TRANS_BYTE: *pa++ = *p++; goto __TRANS_NEXT; __TRANS_SHORT: *((short *)pa) = *((short *)p); pa += sizeof(short); p += sizeof(short); goto __TRANS_NEXT; __TRANS_INT: __TRANS_CTYPE: *((int *)pa) = *((int *)p); pa += sizeof(int); p += sizeof(int); goto __TRANS_NEXT; __TRANS_TYPE: *((int *)pa) = *((int *)p); pa += sizeof(int); p += sizeof(int); *((int *)pa) = 0; pa += sizeof(int); goto __TRANS_NEXT; __TRANS_POINTER: *((int64_t *)pa) = *((int *)p); pa += sizeof(int64_t); p += sizeof(int); goto __TRANS_NEXT; __TRANS_END: continue; } return alloc; } #endif } return current; #if 0 for (i = 0; i < size; i++) { p = current + i * one; ps = swapcode; while (*ps) { if (*ps == 's') { func = SWAP_short; ss = sizeof(short); } else if (*ps == 'i') { func = SWAP_int; ss = sizeof(int); } else if (*ps == 't') { func = SWAP_type; ss = sizeof(int); } else { func = NULL; ss = 1; } ps++; if (isdigit(*ps)) { n = *ps - '0'; ps++; } else if (*ps == '*') { n = one / ss; ps++; } else n = 1; if (func) { while (n) { (*func)(p); p += ss; n--; } } else p += n; } } #endif } TYPE CLASS_ctype_to_type(CLASS *class, CTYPE ctype) { if (ctype.id == T_OBJECT && ctype.value >= 0) return (TYPE)(class->load->class_ref[ctype.value]); else if (ctype.id == T_ARRAY) ERROR_panic("conv_type: bad type"); else return (TYPE)(ctype.id); } static void conv_type(CLASS *class, void *ptype) { CTYPE ctype = *(CTYPE *)ptype; TYPE type; if (_swap) { SWAP_int((int *)&ctype); SWAP_type(&ctype); } if (ctype.id == T_OBJECT && ctype.value >= 0) type = (TYPE)(class->load->class_ref[ctype.value]); else if (ctype.id == T_ARRAY) ERROR_panic("conv_type: bad type"); else type = (TYPE)(ctype.id); *((TYPE *)ptype) = type; } static void conv_type_simple(CLASS *class, int *ptype) { CTYPE ctype = *(CTYPE *)ptype; if (_swap) SWAP_int((int *)&ctype); *ptype = ctype.id; } static void check_version(int loaded) { static bool warning = FALSE; int current = GAMBAS_PCODE_VERSION; if (GAMBAS_FULL_VERSION > 0x01090000 && GAMBAS_FULL_VERSION <= 0x0200FFFF) { if (loaded == current) return; if ((COMPONENT_current && COMPONENT_current->warning) || warning) return; fprintf(stderr, "WARNING: "); if (COMPONENT_current) fprintf(stderr, "%s: ", COMPONENT_current->name); fprintf(stderr, "current bytecode version is "); fprintf(stderr, "%X.%X.%X ", current >> 24, (current >> 16) & 0xFF, current & 0xFFFF); fprintf(stderr, "and project bytecode version is "); fprintf(stderr, "%X.%X.%X. You should recompile your project.\n", loaded >> 24, (loaded >> 16) & 0xFF, loaded & 0xFFFF); if (COMPONENT_current) COMPONENT_current->warning = TRUE; else warning = TRUE; return; } if (loaded > current) THROW(E_CLASS, ClassName, "Version too recent. Please upgrade Gambas.", ""); if (loaded < current) THROW(E_CLASS, ClassName, "Version too old. Please recompile the project.", ""); } #define RELOCATE(_ptr) (_ptr = (char *)&class->string[(int)(intptr_t)(_ptr)]) static int sizeof_ctype(CLASS *class, CTYPE ctype) { size_t size; if (ctype.id != T_ARRAY) return TYPE_sizeof_memory(ctype.id); size = ARRAY_get_size((ARRAY_DESC *)class->load->array[ctype.value]); return (size + 3) & ~3; } static void load_and_relocate(CLASS *class, int len_data, int *pndesc, int *pfirst) { char *section; CLASS_INFO *info; CLASS_HEADER *header; CLASS_DESC *start; CLASS_PARAM *local; CLASS_EVENT *event; CLASS_EXTERN *ext; FUNCTION *func; FUNC_DEBUG *debug; int i, j; int offset; short n_desc, n_class_ref, n_unknown, n_array; ALLOC_ZERO(&class->load, sizeof(CLASS_LOAD), "CLASS_load"); /* header */ section = class->data; header = (CLASS_HEADER *)section; section += sizeof(CLASS_HEADER); class->swap = header->endian != OUTPUT_ENDIAN; _swap = class->swap; if (_swap) fprintf(stderr, "Swapping class %s\n", class->name); if (_swap) { SWAP_int((int *)&header->magic); SWAP_int((int *)&header->version); SWAP_int((int *)&header->flag); } if (header->magic != OUTPUT_MAGIC) { int fd; fprintf(stderr, "Dumping class file at /tmp/gambas-bad-header.out: %d bytes\n", len_data); fd = open("/tmp/gambas-bad-header.out", O_CREAT | O_WRONLY, 0666); write(fd, class->data, len_data); close(fd); THROW(E_CLASS, ClassName, "Bad header", ""); } check_version(header->version); class->debug = header->flag & CF_DEBUG; info = (CLASS_INFO *)get_section("info", §ion, NULL, _s _s _i _i ); #ifdef OS_64BITS class->load->desc = #endif start = (CLASS_DESC *)get_section("description", §ion, &n_desc, _p _t _p _p _p _p ); class->load->cst = (CLASS_CONST *)get_section("constant", §ion, &class->load->n_cst, _i _p _i ); // A special process is needed later class->load->class_ref = (CLASS **)get_section("reference", §ion, &n_class_ref, _p ); class->load->unknown = (char **)get_section("unknown", §ion, &n_unknown, _p ); class->load->stat = (CLASS_VAR *)get_section("static", §ion, &class->load->n_stat, _c _i ); class->load->dyn = (CLASS_VAR *)get_section("dynamic", §ion, &class->load->n_dyn, _c _i ); class->load->event = (CLASS_EVENT *)get_section("event", §ion, &class->n_event, _t _s _s _p _p ); class->load->ext = (CLASS_EXTERN *)get_section("extern", §ion, &class->load->n_ext, _t _s _s _p _p _p ); class->load->func = (FUNCTION *)get_section("function", §ion, &class->load->n_func, _t _b _b _b _b _s _s _s _s _p _p _p _p ); #ifdef OS_64BITS class->load->local = #endif local = (CLASS_PARAM *)get_section("local", §ion, NULL, _t); class->load->array = (CLASS_ARRAY **)get_section("array", §ion, &n_array, _i); // A special process is needed later /* Loading code */ for (i = 0; i < class->load->n_func; i++) { func = &class->load->func[i]; func->code = (ushort *)get_section("code", §ion, NULL, _s); } /* Creation flags */ class->auto_create = (info->flag & CI_AUTOCREATE) != 0; class->no_create = (info->flag & CI_NOCREATE) != 0; //fprintf(stderr, "%s: info->flag = %d auto_create = %d no_create = %d\n", class->name, info->flag, class->auto_create, class->no_create); /* Debugging information */ if (class->debug) { class->load->global = (GLOBAL_SYMBOL *)get_section("debug global", §ion, &class->load->n_global, _s _s _p _c _i ); #ifdef OS_64BITS class->load->debug = #endif debug = (FUNC_DEBUG *)get_section("debug method", §ion, NULL, _s _s _p _p _p _s _s ); for (i = 0; i < class->load->n_func; i++) { func = &class->load->func[i]; func->debug = &debug[i]; } for (i = 0; i < class->load->n_func; i++) { func = &class->load->func[i]; func->debug->pos = (ushort *)get_section("debug line", §ion, NULL, _s ); } for (i = 0; i < class->load->n_func; i++) { func = &class->load->func[i]; func->debug->local = (LOCAL_SYMBOL *)get_section("debug local", §ion, &func->debug->n_local, _s _s _p _i ); } } /* Source file path */ if (class->debug) class->path = (char *)get_section("debug file name", §ion, NULL, NULL); /* Strings */ class->string = (char *)get_section("string", §ion, NULL, NULL); /* Referenced classes */ for (i = 0; i < n_class_ref; i++) { offset = (int)(intptr_t)class->load->class_ref[i]; if (offset >= 0) class->load->class_ref[i] = CLASS_find(&class->string[offset]); else class->load->class_ref[i] = 0; //0x31415926; //CLASS_find(&class->string[-offset]); } /* Datatype conversion */ for (i = 0; i < class->load->n_func; i++) { func = &class->load->func[i]; conv_type(class, &func->type); if (func->n_param > 0) { func->param = (CLASS_PARAM *)local; for (j = 0; j < func->n_param; j++) conv_type(class, &func->param[j].type); local += func->n_param; } if (func->n_local > 0) { func->local = (CLASS_LOCAL *)local; #ifdef OS_64BITS // The local variable descriptions are CTYPE that are 32 bits only. // We must transform a 64 bits integer array into a 32 bits integer array. for (j = 0; j < func->n_local; j++) { func->local[j] = func->local[j * 2]; } #endif // As the 'local' section is a mix of CLASS_PARAM and CLASS_LOCAL, // we swap endianness there and not during get_section() if (_swap) { for (j = 0; j < func->n_local; j++) { SWAP_int((int *)&func->local[j].type); SWAP_type(&func->local[j].type); } } local += func->n_local; } } /* Events information */ for (i = 0; i < class->n_event; i++) { event = &class->load->event[i]; conv_type(class, &event->type); if (event->n_param > 0) { event->param = (CLASS_PARAM *)local; for (j = 0; j < event->n_param; j++) conv_type(class, &event->param[j].type); local += event->n_param; } } /* Extern calls information */ for (i = 0; i < class->load->n_ext; i++) { ext = &class->load->ext[i]; conv_type(class, &ext->type); if (ext->n_param > 0) { ext->param = (CLASS_PARAM *)local; for (j = 0; j < ext->n_param; j++) conv_type(class, &ext->param[j].type); local += ext->n_param; } } /* End of file reached ? */ if (section != &class->data[len_data]) { /*printf("%d\n", &class->load[BUFFER_length(class->load)] - section);*/ THROW(E_CLASS, ClassName, "Unknown section", ""); } /* Static array definition relocation */ if (n_array > 0) { #ifdef OS_64BITS CLASS_ARRAY **array = class->load->array; n_array = *((int *)array) / sizeof(int); ALLOC(&class->load->array, sizeof(void *) * n_array, "CLASS_load"); #else n_array = *((int *)class->load->array) / sizeof(int); #endif for (i = 0; i < n_array; i++) { #ifdef OS_64BITS class->load->array[i] = (CLASS_ARRAY *)((char *)array + ((int *)array)[i]); #else class->load->array[i] = (CLASS_ARRAY *)((char *)class->load->array + ((int *)class->load->array)[i]); #endif } } /* Computes variable position again */ { int pos; CLASS_VAR *var; pos = 0; for (i = 0; i < class->load->n_stat; i++) { var = &class->load->stat[i]; var->pos = pos; pos += sizeof_ctype(class, var->type); } info->s_static = pos; pos = 0; for (i = 0; i < class->load->n_dyn; i++) { var = &class->load->dyn[i]; var->pos = pos; pos += sizeof_ctype(class, var->type); } info->s_dynamic = pos; } /* String relocation */ for (i = 0; i < n_desc; i++) RELOCATE(start[i].gambas.name); for (i = 0; i < n_unknown; i++) RELOCATE(class->load->unknown[i]); for (i = 0; i < class->n_event; i++) RELOCATE(class->load->event[i].name); for (i = 0; i < class->load->n_ext; i++) { RELOCATE(class->load->ext[i].library); RELOCATE(class->load->ext[i].alias); } if (class->debug) { for (i = 0; i < class->load->n_global; i++) { RELOCATE(class->load->global[i].sym.name); /*conv_type(class, &(class->load->global[i].type));*/ } for (i = 0; i < class->load->n_func; i++) { func = &class->load->func[i]; RELOCATE(func->debug->name); for (j = 0; j < func->debug->n_local; j++) RELOCATE(func->debug->local[j].sym.name); } } /* Inheritance */ if (info->parent >= 0) { //printf("%s inherits %s\n", class->name, (class->load->class_ref[info->parent])->name); CLASS_inheritance(class, class->load->class_ref[info->parent]); } /* If there is no dynamic variable, then the class is not instanciable */ //if (info->s_dynamic == 0) // class->no_create = TRUE; /* Descriptions */ CLASS_make_description(class, start, n_desc, pfirst); /* Class size and offsets */ CLASS_calc_info(class, class->n_event, info->s_dynamic, FALSE, info->s_static); *pndesc = n_desc; } void CLASS_load_without_init(CLASS *class) { int i; FUNCTION *func; CLASS_DESC *desc; CLASS_CONST *cc; CLASS_VAR *var; int len; CLASS_EVENT *event; CLASS_EXTERN *ext; VALUE value; int len_data; int n_desc; int offset; int first; int first_event; COMPONENT *save; //size_t alloc = MEMORY_size; if (class->state >= CS_LOADED) return; #if DEBUG_LOAD printf("Loading class %s (%p)...\n", class->name, class); #endif #ifdef DEBUG Class = class; NSection = 0; #endif ClassName = class->name; if (class->in_load) THROW(E_CLASS, ClassName, "Circular reference", ""); if (COMPONENT_current) class->component = COMPONENT_current; else if (CP) class->component = CP->component; else class->component = NULL; save = COMPONENT_current; COMPONENT_current = class->component; len = strlen(class->name); { char name[len + 9]; char *p; strcpy(name, ".gambas/"); p = &name[8]; for (i = 0; i < len; i++) *p++ = toupper(class->name[i]); *p = 0; TRY { //class->mmapped = !STREAM_map(name, &class->data, &len_data); STREAM_load(name, &class->data, &len_data); } CATCH { THROW(E_CLASS, class->name, "Unable to load class file", ""); } END_TRY /*if (BUFFER_load_file(&class->data, FILE_get(name))) THROW(E_CLASS, ClassName, "Unable to load class file", "");*/ } COMPONENT_current = save; class->in_load = TRUE; #if DEBUG_COMP if (class->component) fprintf(stderr, "class %s -> component %s\n", class->name, class->component->name); else fprintf(stderr, "class %s -> no component\n", class->name); #endif load_and_relocate(class, len_data, &n_desc, &first); /* Information on static and dynamic variables */ if (class->parent) offset = class->parent->off_event; else offset = sizeof(OBJECT); for (i = 0; i < class->load->n_dyn; i++) { var = &class->load->dyn[i]; var->pos += offset; } /* Constant conversion & relocation */ for (i = 0; i < class->load->n_cst; i++) { cc = &class->load->cst[i]; conv_type_simple(class, &(cc->type)); switch (cc->type) { case T_BOOLEAN: case T_BYTE: case T_SHORT: case T_INTEGER: #ifdef OS_64BITS // Special process for integer constants cc->_integer.value = (int)(intptr_t)cc->_string.addr; #endif break; case T_LONG: #ifdef OS_64BITS // Special process for long constants: the first 32 bits part of the LONG constant // has been extended to 64 bits cc->_swap.val[0] = (int)(*((int64_t *)(void *)&cc->_string.addr)); cc->_swap.val[1] = cc->_string.len; #endif /* The two 32 bits parts of the LONG value have been already swapped independently. So we just have to swap the two parts again. */ if (_swap) { int val; val = cc->_swap.val[0]; cc->_swap.val[0] = cc->_swap.val[1]; cc->_swap.val[1] = val; } break; case T_STRING: case T_CSTRING: cc->_string.addr += (intptr_t)class->string; break; case T_FLOAT: case T_SINGLE: cc->_string.addr += (intptr_t)class->string; if (NUMBER_from_string(NB_READ_FLOAT, cc->_string.addr, strlen(cc->_string.addr), &value)) THROW(E_CLASS, ClassName, "Bad constant", ""); cc->_float.value = value._float.value; break; } #if 0 if (!TYPE_is_integer_long(cc->type)) cc->_string.addr += (int)class->string; if (cc->type == T_FLOAT || cc->type == T_SINGLE) { if (NUMBER_from_string(NB_READ_FLOAT, cc->_string.addr, strlen(cc->_string.addr), &value)) THROW(E_CLASS, ClassName, "Bad constant", ""); cc->_float.value = value._float.value; } else if (cc->type == T_LONG) { /* Each long value has been already swapped independently. In the case of a LONG constant, we just have to swap the two 32 bits parts of the constant value. */ if (_swap) { int val; val = cc->_swap.val[0]; cc->_swap.val[0] = cc->_swap.val[1]; cc->_swap.val[1] = val; } } #ifdef OS_64BITS // Special process for integer constants else if (cc->type <= T_INTEGER) { cc->_integer.value = (int)cc->_string.addr; } #endif #endif } /* Class public description */ for (i = first; i < class->n_desc; i++) { desc = class->table[i].desc; desc->gambas.name = (char *)CLASS_DESC_get_type_name(desc); conv_type(class, &desc->gambas.type); switch (CLASS_DESC_get_type(desc)) { case CD_METHOD: case CD_STATIC_METHOD: func = &class->load->func[desc->gambas.val1]; desc->method.exec = (void (*)())desc->gambas.val1; desc->method.npmin = func->npmin; desc->method.npmax = func->n_param; desc->method.signature = (TYPE *)func->param; //desc->method.help = NULL; desc->method.native = FALSE; break; case CD_PROPERTY: case CD_STATIC_PROPERTY: desc->property.read = (void (*)())desc->gambas.val1; desc->property.write = (void (*)())desc->gambas.val2; if ((intptr_t)desc->property.write == -1L) desc->gambas.name = *desc->gambas.name == 'p' ? "r" : "R"; desc->property.native = FALSE; break; case CD_VARIABLE: case CD_STATIC_VARIABLE: if (CLASS_DESC_get_type(desc) == CD_STATIC_VARIABLE) var = &class->load->stat[desc->gambas.val1]; else var = &class->load->dyn[desc->gambas.val1]; desc->variable.offset = var->pos; break; case CD_CONSTANT: cc = &class->load->cst[desc->gambas.val1]; if (TYPE_is_integer(desc->constant.type)) desc->constant.value._integer = cc->_integer.value; else if (desc->constant.type == T_FLOAT) desc->constant.value._float = cc->_float.value; else if (desc->constant.type == T_LONG) desc->constant.value._long = cc->_long.value; else { desc->constant.type = T_CSTRING; desc->constant.value._string = cc->_string.addr; } break; case CD_EVENT: event = &class->load->event[desc->gambas.val1]; desc->event.npmin = event->n_param; desc->event.npmax = event->n_param; desc->event.signature = (TYPE *)event->param; //desc->event.help = NULL; break; case CD_EXTERN: ext = &class->load->ext[desc->gambas.val1]; desc->ext.npmin = ext->n_param; desc->ext.npmax = ext->n_param; desc->ext.npmin = ext->n_param; desc->ext.signature = (TYPE *)ext->param; //desc->event.help = NULL; break; default: THROW(E_CLASS, ClassName, "Bad description", ""); } desc->method.class = class; } /* Event description */ CLASS_make_event(class, &first_event); if (class->free_event && class->n_event > first_event) memcpy(&class->event[first_event], class->load->event, (class->n_event - first_event) * sizeof(CLASS_EVENT)); /* Sort the class description */ CLASS_sort(class); /* Special methods */ CLASS_search_special(class); /* Class is loaded... */ class->in_load = FALSE; /* ...and usable ! */ class->state = CS_LOADED; /* Init breakpoints */ if (EXEC_debug) DEBUG.InitBreakpoints(class); /* Call the static initializer */ EXEC.native = FALSE; EXEC.class = class; EXEC.object = NULL; EXEC.nparam = 0; EXEC.index = FUNC_INIT_STATIC; //EXEC.func = &class->load->func[FUNC_INIT_STATIC]; EXEC_function(); //total += MEMORY_size - alloc; //printf("%s: %d TOTAL = %d\n", class->name, MEMORY_size - alloc, total); } void CLASS_load_real(CLASS *class) { #if 0 char *name = class->name; int len = strlen(name); if (len >= 3 && name[len - 2] == '[' && name[len - 1] == ']') { CLASS_create_array_class(class); return; } #endif CLASS_load_without_init(class); class->state = CS_READY; EXEC_public(class, NULL, "_init", 0); }