X-Git-Url: https://git.xonotic.org/?a=blobdiff_plain;f=code.c;h=35f758a22526f966cc00c7a28c45c74c0ee0d43a;hb=b2348e1de06ecbc6298c7caae7ac0deaa444dffb;hp=ef33d314ab367b4eaa12a4e9777d1bc66ae927ff;hpb=bda6fc826cac615d0d3a7ed546ff08d9dbce3bce;p=xonotic%2Fgmqcc.git diff --git a/code.c b/code.c index ef33d31..35f758a 100644 --- a/code.c +++ b/code.c @@ -1,6 +1,7 @@ /* - * Copyright (C) 2012 - * Dale Weiler + * Copyright (C) 2012, 2013 + * Dale Weiler + * Wolfgang Bumiller * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in @@ -21,9 +22,365 @@ * SOFTWARE. */ #include "gmqcc.h" + /* - * This file is empty: This is where codegen will take place: Once the - * parser is completed, right now it on;y creates parse trees. Syntax - * checking and other convoluted things on the parse tree need to take - * place much like a parser. + * We could use the old method of casting to uintptr_t then to void* + * or qcint; however, it's incredibly unsafe for two reasons. + * 1) The compilers aliasing optimization can legally make it unstable + * (it's undefined behaviour). + * + * 2) The cast itself depends on fresh storage (newly allocated in which + * ever function is using the cast macros), the contents of which are + * transferred in a way that the obligation to release storage is not + * propagated. */ +typedef union { + void *enter; + qcint leave; +} code_hash_entry_t; + +/* Some sanity macros */ +#define CODE_HASH_ENTER(ENTRY) ((ENTRY).enter) +#define CODE_HASH_LEAVE(ENTRY) ((ENTRY).leave) + +void code_push_statement(code_t *code, prog_section_statement *stmt, int linenum) +{ + vec_push(code->statements, *stmt); + vec_push(code->linenums, linenum); +} + +void code_pop_statement(code_t *code) +{ + vec_pop(code->statements); + vec_pop(code->linenums); +} + +code_t *code_init() { + static prog_section_function empty_function = {0,0,0,0,0,0,0,{0,0,0,0,0,0,0,0}}; + static prog_section_statement empty_statement = {0,{0},{0},{0}}; + static prog_section_def empty_def = {0, 0, 0}; + + code_t *code = (code_t*)mem_a(sizeof(code_t)); + int i = 0; + + memset(code, 0, sizeof(code_t)); + code->entfields = 0; + code->string_cache = util_htnew(OPTS_OPTIMIZATION(OPTIM_OVERLAP_STRINGS) ? 0x100 : 1024); + + /* + * The way progs.dat is suppose to work is odd, there needs to be + * some null (empty) statements, functions, and 28 globals + */ + for(; i < 28; i++) + vec_push(code->globals, 0); + + vec_push(code->chars, '\0'); + vec_push(code->functions, empty_function); + + code_push_statement(code, &empty_statement, 0); + + vec_push(code->defs, empty_def); + vec_push(code->fields, empty_def); + + return code; +} + +void *code_util_str_htgeth(hash_table_t *ht, const char *key, size_t bin); + +uint32_t code_genstring(code_t *code, const char *str) { + size_t hash; + code_hash_entry_t existing; + + if (!str) + return 0; + + if (!*str) { + if (!code->string_cached_empty) { + code->string_cached_empty = vec_size(code->chars); + vec_push(code->chars, 0); + } + return code->string_cached_empty; + } + + if (OPTS_OPTIMIZATION(OPTIM_OVERLAP_STRINGS)) { + hash = ((unsigned char*)str)[strlen(str)-1]; + CODE_HASH_ENTER(existing) = code_util_str_htgeth(code->string_cache, str, hash); + } else { + hash = util_hthash(code->string_cache, str); + CODE_HASH_ENTER(existing) = util_htgeth(code->string_cache, str, hash); + } + + if (CODE_HASH_ENTER(existing)) + return CODE_HASH_LEAVE(existing); + + CODE_HASH_LEAVE(existing) = vec_size(code->chars); + vec_upload(code->chars, str, strlen(str)+1); + + util_htseth(code->string_cache, str, hash, CODE_HASH_ENTER(existing)); + return CODE_HASH_LEAVE(existing); +} + +qcint code_alloc_field (code_t *code, size_t qcsize) +{ + qcint pos = (qcint)code->entfields; + code->entfields += qcsize; + return pos; +} + +static void code_create_header(code_t *code, prog_header *code_header) { + code_header->statements.offset = sizeof(prog_header); + code_header->statements.length = vec_size(code->statements); + code_header->defs.offset = code_header->statements.offset + (sizeof(prog_section_statement) * vec_size(code->statements)); + code_header->defs.length = vec_size(code->defs); + code_header->fields.offset = code_header->defs.offset + (sizeof(prog_section_def) * vec_size(code->defs)); + code_header->fields.length = vec_size(code->fields); + code_header->functions.offset = code_header->fields.offset + (sizeof(prog_section_field) * vec_size(code->fields)); + code_header->functions.length = vec_size(code->functions); + code_header->globals.offset = code_header->functions.offset + (sizeof(prog_section_function) * vec_size(code->functions)); + code_header->globals.length = vec_size(code->globals); + code_header->strings.offset = code_header->globals.offset + (sizeof(int32_t) * vec_size(code->globals)); + code_header->strings.length = vec_size(code->chars); + code_header->version = 6; + + if (OPTS_OPTION_BOOL(OPTION_FORCECRC)) + code_header->crc16 = OPTS_OPTION_U16(OPTION_FORCED_CRC); + else + code_header->crc16 = code->crc; + code_header->entfield = code->entfields; + + if (OPTS_FLAG(DARKPLACES_STRING_TABLE_BUG)) { + util_debug("GEN", "Patching stringtable for -fdarkplaces-stringtablebug\n"); + + /* >= + P */ + vec_push(code->chars, '\0'); /* > */ + vec_push(code->chars, '\0'); /* = */ + vec_push(code->chars, '\0'); /* P */ + } + + /* ensure all data is in LE format */ + util_endianswap(&code_header->version, 1, sizeof(code_header->version)); + util_endianswap(&code_header->crc16, 1, sizeof(code_header->crc16)); + util_endianswap(&code_header->statements, 2, sizeof(code_header->statements.offset)); + util_endianswap(&code_header->defs, 2, sizeof(code_header->statements.offset)); + util_endianswap(&code_header->fields, 2, sizeof(code_header->statements.offset)); + util_endianswap(&code_header->functions, 2, sizeof(code_header->statements.offset)); + util_endianswap(&code_header->strings, 2, sizeof(code_header->statements.offset)); + util_endianswap(&code_header->globals, 2, sizeof(code_header->statements.offset)); + util_endianswap(&code_header->entfield, 1, sizeof(code_header->entfield)); + + /* + * These are not part of the header but we ensure LE format here to save on duplicated + * code. + */ + util_endianswap(code->statements, vec_size(code->statements), sizeof(prog_section_statement)); + util_endianswap(code->defs, vec_size(code->defs), sizeof(prog_section_def)); + util_endianswap(code->fields, vec_size(code->fields), sizeof(prog_section_field)); + util_endianswap(code->functions, vec_size(code->functions), sizeof(prog_section_function)); + util_endianswap(code->globals, vec_size(code->globals), sizeof(int32_t)); +} + +/* + * Same principle except this one allocates memory and writes the lno(optional) and the dat file + * directly out to allocated memory. Which is actually very useful for the future library support + * we're going to add. + */ +bool code_write_memory(code_t *code, uint8_t **datmem, size_t *sizedat, uint8_t **lnomem, size_t *sizelno) { + prog_header code_header; + uint32_t offset = 0; + + if (!datmem) + return false; + + code_create_header(code, &code_header); + + #define WRITE_CHUNK(C,X,S) \ + do { \ + memcpy((void*)(&(*C)[offset]), (const void*)(X), (S)); \ + offset += (S); \ + } while (0) + + /* Calculate size required to store entire file out to memory */ + if (lnomem) { + uint32_t version = 1; + + *sizelno += 4; /* LNOF */ + *sizelno += sizeof(version); + *sizelno += sizeof(code_header.defs.length); + *sizelno += sizeof(code_header.globals.length); + *sizelno += sizeof(code_header.fields.length); + *sizelno += sizeof(code_header.statements.length); + *sizelno += sizeof(code->linenums[0]) * vec_size(code->linenums); + + *lnomem = (uint8_t*)mem_a(*sizelno); + + WRITE_CHUNK(lnomem, "LNOF", 4); + WRITE_CHUNK(lnomem, &version, sizeof(version)); + WRITE_CHUNK(lnomem, &code_header.defs.length, sizeof(code_header.defs.length)); + WRITE_CHUNK(lnomem, &code_header.globals.length, sizeof(code_header.globals.length)); + WRITE_CHUNK(lnomem, &code_header.fields.length, sizeof(code_header.fields.length)); + WRITE_CHUNK(lnomem, &code_header.statements.length, sizeof(code_header.statements.length)); + + /* something went terribly wrong */ + if (offset != *sizelno) { + mem_d(*lnomem); + *sizelno = 0; + return false; + } + offset = 0; + } + + /* Write out the dat */ + *sizedat += sizeof(prog_header); + *sizedat += sizeof(prog_section_statement) * vec_size(code->statements); + *sizedat += sizeof(prog_section_def) * vec_size(code->defs); + *sizedat += sizeof(prog_section_field) * vec_size(code->fields); + *sizedat += sizeof(prog_section_function) * vec_size(code->functions); + *sizedat += sizeof(int32_t) * vec_size(code->globals); + *sizedat += 1 * vec_size(code->chars); + + *datmem = (uint8_t*)mem_a(*sizedat); + + WRITE_CHUNK(datmem, &code_header, sizeof(prog_header)); + WRITE_CHUNK(datmem, code->statements, sizeof(prog_section_statement) * vec_size(code->statements)); + WRITE_CHUNK(datmem, code->defs, sizeof(prog_section_def) * vec_size(code->defs)); + WRITE_CHUNK(datmem, code->fields, sizeof(prog_section_field) * vec_size(code->fields)); + WRITE_CHUNK(datmem, code->functions, sizeof(prog_section_function) * vec_size(code->functions)); + WRITE_CHUNK(datmem, code->globals, sizeof(int32_t) * vec_size(code->globals)); + WRITE_CHUNK(datmem, code->chars, 1 * vec_size(code->chars)); + + #undef WRITE_CHUNK + + vec_free(code->statements); + vec_free(code->linenums); + vec_free(code->defs); + vec_free(code->fields); + vec_free(code->functions); + vec_free(code->globals); + vec_free(code->chars); + + util_htdel(code->string_cache); + mem_d(code); + + return true; +} + +bool code_write(code_t *code, const char *filename, const char *lnofile) { + prog_header code_header; + FILE *fp = NULL; + size_t it = 2; + + code_create_header(code, &code_header); + + if (lnofile) { + uint32_t version = 1; + + fp = fs_file_open(lnofile, "wb"); + if (!fp) + return false; + + util_endianswap(&version, 1, sizeof(version)); + util_endianswap(code->linenums, vec_size(code->linenums), sizeof(code->linenums[0])); + + + if (fs_file_write("LNOF", 4, 1, fp) != 1 || + fs_file_write(&version, sizeof(version), 1, fp) != 1 || + fs_file_write(&code_header.defs.length, sizeof(code_header.defs.length), 1, fp) != 1 || + fs_file_write(&code_header.globals.length, sizeof(code_header.globals.length), 1, fp) != 1 || + fs_file_write(&code_header.fields.length, sizeof(code_header.fields.length), 1, fp) != 1 || + fs_file_write(&code_header.statements.length, sizeof(code_header.statements.length), 1, fp) != 1 || + fs_file_write(code->linenums, sizeof(code->linenums[0]), vec_size(code->linenums), fp) != vec_size(code->linenums)) + { + con_err("failed to write lno file\n"); + } + + fs_file_close(fp); + fp = NULL; + } + + fp = fs_file_open(filename, "wb"); + if (!fp) + return false; + + if (1 != fs_file_write(&code_header, sizeof(prog_header) , 1 , fp) || + vec_size(code->statements) != fs_file_write(code->statements, sizeof(prog_section_statement), vec_size(code->statements), fp) || + vec_size(code->defs) != fs_file_write(code->defs, sizeof(prog_section_def) , vec_size(code->defs) , fp) || + vec_size(code->fields) != fs_file_write(code->fields, sizeof(prog_section_field) , vec_size(code->fields) , fp) || + vec_size(code->functions) != fs_file_write(code->functions, sizeof(prog_section_function) , vec_size(code->functions) , fp) || + vec_size(code->globals) != fs_file_write(code->globals, sizeof(int32_t) , vec_size(code->globals) , fp) || + vec_size(code->chars) != fs_file_write(code->chars, 1 , vec_size(code->chars) , fp)) + { + fs_file_close(fp); + return false; + } + + util_debug("GEN","HEADER:\n"); + util_debug("GEN"," version: = %d\n", code_header.version ); + util_debug("GEN"," crc16: = %d\n", code_header.crc16 ); + util_debug("GEN"," entfield: = %d\n", code_header.entfield); + util_debug("GEN"," statements = {.offset = % 8d, .length = % 8d}\n", code_header.statements.offset, code_header.statements.length); + util_debug("GEN"," defs = {.offset = % 8d, .length = % 8d}\n", code_header.defs .offset, code_header.defs .length); + util_debug("GEN"," fields = {.offset = % 8d, .length = % 8d}\n", code_header.fields .offset, code_header.fields .length); + util_debug("GEN"," functions = {.offset = % 8d, .length = % 8d}\n", code_header.functions .offset, code_header.functions .length); + util_debug("GEN"," globals = {.offset = % 8d, .length = % 8d}\n", code_header.globals .offset, code_header.globals .length); + util_debug("GEN"," strings = {.offset = % 8d, .length = % 8d}\n", code_header.strings .offset, code_header.strings .length); + + /* FUNCTIONS */ + util_debug("GEN", "FUNCTIONS:\n"); + for (; it < vec_size(code->functions); it++) { + size_t j = code->functions[it].entry; + util_debug("GEN", " {.entry =% 5d, .firstlocal =% 5d, .locals =% 5d, .profile =% 5d, .name =% 5d, .file =% 5d, .nargs =% 5d, .argsize ={%d,%d,%d,%d,%d,%d,%d,%d} }\n", + code->functions[it].entry, + code->functions[it].firstlocal, + code->functions[it].locals, + code->functions[it].profile, + code->functions[it].name, + code->functions[it].file, + code->functions[it].nargs, + code->functions[it].argsize[0], + code->functions[it].argsize[1], + code->functions[it].argsize[2], + code->functions[it].argsize[3], + code->functions[it].argsize[4], + code->functions[it].argsize[5], + code->functions[it].argsize[6], + code->functions[it].argsize[7] + + ); + util_debug("GEN", " NAME: %s\n", &code->chars[code->functions[it].name]); + /* Internal functions have no code */ + if (code->functions[it].entry >= 0) { + util_debug("GEN", " CODE:\n"); + for (;;) { + if (code->statements[j].opcode != INSTR_DONE) + util_debug("GEN", " %-12s {% 5i,% 5i,% 5i}\n", + asm_instr[code->statements[j].opcode].m, + code->statements[j].o1.s1, + code->statements[j].o2.s1, + code->statements[j].o3.s1 + ); + else { + util_debug("GEN", " DONE {0x00000,0x00000,0x00000}\n"); + break; + } + j++; + } + } + } + + fs_file_close(fp); + return true; +} + +void code_cleanup(code_t *code) { + vec_free(code->statements); + vec_free(code->linenums); + vec_free(code->defs); + vec_free(code->fields); + vec_free(code->functions); + vec_free(code->globals); + vec_free(code->chars); + + util_htdel(code->string_cache); + + mem_d(code); +}