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authorMichael Smith <mikesmiffy128@gmail.com>2021-12-29 18:33:40 +0000
committerMichael Smith <mikesmiffy128@gmail.com>2021-12-29 18:33:40 +0000
commit0f232d8eaee1f94896596a9969982297cee7dc67 (patch)
treea4058c336806e9f150d4d02b0358d00266ef11ce /src/3p/chibicc/main.c
parentd40d588f6d7cf866f7de41db9efffdd6c1a05135 (diff)
Remove some unused files
Diffstat (limited to 'src/3p/chibicc/main.c')
-rw-r--r--src/3p/chibicc/main.c791
1 files changed, 0 insertions, 791 deletions
diff --git a/src/3p/chibicc/main.c b/src/3p/chibicc/main.c
deleted file mode 100644
index ffaabf4..0000000
--- a/src/3p/chibicc/main.c
+++ /dev/null
@@ -1,791 +0,0 @@
-#include "chibicc.h"
-
-typedef enum {
- FILE_NONE, FILE_C, FILE_ASM, FILE_OBJ, FILE_AR, FILE_DSO,
-} FileType;
-
-StringArray include_paths;
-bool opt_fcommon = true;
-bool opt_fpic;
-
-static FileType opt_x;
-static StringArray opt_include;
-static bool opt_E;
-static bool opt_M;
-static bool opt_MD;
-static bool opt_MMD;
-static bool opt_MP;
-static bool opt_S;
-static bool opt_c;
-static bool opt_cc1;
-static bool opt_hash_hash_hash;
-static bool opt_static;
-static bool opt_shared;
-static char *opt_MF;
-static char *opt_MT;
-static char *opt_o;
-
-static StringArray ld_extra_args;
-static StringArray std_include_paths;
-
-char *base_file;
-static char *output_file;
-
-static StringArray input_paths;
-static StringArray tmpfiles;
-
-static void usage(int status) {
- fprintf(stderr, "chibicc [ -o <path> ] <file>\n");
- exit(status);
-}
-
-static bool take_arg(char *arg) {
- char *x[] = {
- "-o", "-I", "-idirafter", "-include", "-x", "-MF", "-MT", "-Xlinker",
- };
-
- for (int i = 0; i < sizeof(x) / sizeof(*x); i++)
- if (!strcmp(arg, x[i]))
- return true;
- return false;
-}
-
-static void add_default_include_paths(char *argv0) {
- // We expect that chibicc-specific include files are installed
- // to ./include relative to argv[0].
- strarray_push(&include_paths, format("%s/include", dirname(strdup(argv0))));
-
- // Add standard include paths.
- strarray_push(&include_paths, "/usr/local/include");
- strarray_push(&include_paths, "/usr/include/x86_64-linux-gnu");
- strarray_push(&include_paths, "/usr/include");
-
- // Keep a copy of the standard include paths for -MMD option.
- for (int i = 0; i < include_paths.len; i++)
- strarray_push(&std_include_paths, include_paths.data[i]);
-}
-
-static void define(char *str) {
- char *eq = strchr(str, '=');
- if (eq)
- define_macro(strndup(str, eq - str), eq + 1);
- else
- define_macro(str, "1");
-}
-
-static FileType parse_opt_x(char *s) {
- if (!strcmp(s, "c"))
- return FILE_C;
- if (!strcmp(s, "assembler"))
- return FILE_ASM;
- if (!strcmp(s, "none"))
- return FILE_NONE;
- error("<command line>: unknown argument for -x: %s", s);
-}
-
-static char *quote_makefile(char *s) {
- char *buf = calloc(1, strlen(s) * 2 + 1);
-
- for (int i = 0, j = 0; s[i]; i++) {
- switch (s[i]) {
- case '$':
- buf[j++] = '$';
- buf[j++] = '$';
- break;
- case '#':
- buf[j++] = '\\';
- buf[j++] = '#';
- break;
- case ' ':
- case '\t':
- for (int k = i - 1; k >= 0 && s[k] == '\\'; k--)
- buf[j++] = '\\';
- buf[j++] = '\\';
- buf[j++] = s[i];
- break;
- default:
- buf[j++] = s[i];
- break;
- }
- }
- return buf;
-}
-
-static void parse_args(int argc, char **argv) {
- // Make sure that all command line options that take an argument
- // have an argument.
- for (int i = 1; i < argc; i++)
- if (take_arg(argv[i]))
- if (!argv[++i])
- usage(1);
-
- StringArray idirafter = {};
-
- for (int i = 1; i < argc; i++) {
- if (!strcmp(argv[i], "-###")) {
- opt_hash_hash_hash = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-cc1")) {
- opt_cc1 = true;
- continue;
- }
-
- if (!strcmp(argv[i], "--help"))
- usage(0);
-
- if (!strcmp(argv[i], "-o")) {
- opt_o = argv[++i];
- continue;
- }
-
- if (!strncmp(argv[i], "-o", 2)) {
- opt_o = argv[i] + 2;
- continue;
- }
-
- if (!strcmp(argv[i], "-S")) {
- opt_S = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-fcommon")) {
- opt_fcommon = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-fno-common")) {
- opt_fcommon = false;
- continue;
- }
-
- if (!strcmp(argv[i], "-c")) {
- opt_c = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-E")) {
- opt_E = true;
- continue;
- }
-
- if (!strncmp(argv[i], "-I", 2)) {
- strarray_push(&include_paths, argv[i] + 2);
- continue;
- }
-
- if (!strcmp(argv[i], "-D")) {
- define(argv[++i]);
- continue;
- }
-
- if (!strncmp(argv[i], "-D", 2)) {
- define(argv[i] + 2);
- continue;
- }
-
- if (!strcmp(argv[i], "-U")) {
- undef_macro(argv[++i]);
- continue;
- }
-
- if (!strncmp(argv[i], "-U", 2)) {
- undef_macro(argv[i] + 2);
- continue;
- }
-
- if (!strcmp(argv[i], "-include")) {
- strarray_push(&opt_include, argv[++i]);
- continue;
- }
-
- if (!strcmp(argv[i], "-x")) {
- opt_x = parse_opt_x(argv[++i]);
- continue;
- }
-
- if (!strncmp(argv[i], "-x", 2)) {
- opt_x = parse_opt_x(argv[i] + 2);
- continue;
- }
-
- if (!strncmp(argv[i], "-l", 2) || !strncmp(argv[i], "-Wl,", 4)) {
- strarray_push(&input_paths, argv[i]);
- continue;
- }
-
- if (!strcmp(argv[i], "-Xlinker")) {
- strarray_push(&ld_extra_args, argv[++i]);
- continue;
- }
-
- if (!strcmp(argv[i], "-s")) {
- strarray_push(&ld_extra_args, "-s");
- continue;
- }
-
- if (!strcmp(argv[i], "-M")) {
- opt_M = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-MF")) {
- opt_MF = argv[++i];
- continue;
- }
-
- if (!strcmp(argv[i], "-MP")) {
- opt_MP = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-MT")) {
- if (opt_MT == NULL)
- opt_MT = argv[++i];
- else
- opt_MT = format("%s %s", opt_MT, argv[++i]);
- continue;
- }
-
- if (!strcmp(argv[i], "-MD")) {
- opt_MD = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-MQ")) {
- if (opt_MT == NULL)
- opt_MT = quote_makefile(argv[++i]);
- else
- opt_MT = format("%s %s", opt_MT, quote_makefile(argv[++i]));
- continue;
- }
-
- if (!strcmp(argv[i], "-MMD")) {
- opt_MD = opt_MMD = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-fpic") || !strcmp(argv[i], "-fPIC")) {
- opt_fpic = true;
- continue;
- }
-
- if (!strcmp(argv[i], "-cc1-input")) {
- base_file = argv[++i];
- continue;
- }
-
- if (!strcmp(argv[i], "-cc1-output")) {
- output_file = argv[++i];
- continue;
- }
-
- if (!strcmp(argv[i], "-idirafter")) {
- strarray_push(&idirafter, argv[i++]);
- continue;
- }
-
- if (!strcmp(argv[i], "-static")) {
- opt_static = true;
- strarray_push(&ld_extra_args, "-static");
- continue;
- }
-
- if (!strcmp(argv[i], "-shared")) {
- opt_shared = true;
- strarray_push(&ld_extra_args, "-shared");
- continue;
- }
-
- if (!strcmp(argv[i], "-L")) {
- strarray_push(&ld_extra_args, "-L");
- strarray_push(&ld_extra_args, argv[++i]);
- continue;
- }
-
- if (!strncmp(argv[i], "-L", 2)) {
- strarray_push(&ld_extra_args, "-L");
- strarray_push(&ld_extra_args, argv[i] + 2);
- continue;
- }
-
- if (!strcmp(argv[i], "-hashmap-test")) {
- hashmap_test();
- exit(0);
- }
-
- // These options are ignored for now.
- if (!strncmp(argv[i], "-O", 2) ||
- !strncmp(argv[i], "-W", 2) ||
- !strncmp(argv[i], "-g", 2) ||
- !strncmp(argv[i], "-std=", 5) ||
- !strcmp(argv[i], "-ffreestanding") ||
- !strcmp(argv[i], "-fno-builtin") ||
- !strcmp(argv[i], "-fno-omit-frame-pointer") ||
- !strcmp(argv[i], "-fno-stack-protector") ||
- !strcmp(argv[i], "-fno-strict-aliasing") ||
- !strcmp(argv[i], "-m64") ||
- !strcmp(argv[i], "-mno-red-zone") ||
- !strcmp(argv[i], "-w"))
- continue;
-
- if (argv[i][0] == '-' && argv[i][1] != '\0')
- error("unknown argument: %s", argv[i]);
-
- strarray_push(&input_paths, argv[i]);
- }
-
- for (int i = 0; i < idirafter.len; i++)
- strarray_push(&include_paths, idirafter.data[i]);
-
- if (input_paths.len == 0)
- error("no input files");
-
- // -E implies that the input is the C macro language.
- if (opt_E)
- opt_x = FILE_C;
-}
-
-static FILE *open_file(char *path) {
- if (!path || strcmp(path, "-") == 0)
- return stdout;
-
- FILE *out = fopen(path, "w");
- if (!out)
- error("cannot open output file: %s: %s", path, strerror(errno));
- return out;
-}
-
-static bool endswith(char *p, char *q) {
- int len1 = strlen(p);
- int len2 = strlen(q);
- return (len1 >= len2) && !strcmp(p + len1 - len2, q);
-}
-
-// Replace file extension
-static char *replace_extn(char *tmpl, char *extn) {
- char *filename = basename(strdup(tmpl));
- char *dot = strrchr(filename, '.');
- if (dot)
- *dot = '\0';
- return format("%s%s", filename, extn);
-}
-
-static void cleanup(void) {
- for (int i = 0; i < tmpfiles.len; i++)
- unlink(tmpfiles.data[i]);
-}
-
-static char *create_tmpfile(void) {
- char *path = strdup("/tmp/chibicc-XXXXXX");
- int fd = mkstemp(path);
- if (fd == -1)
- error("mkstemp failed: %s", strerror(errno));
- close(fd);
-
- strarray_push(&tmpfiles, path);
- return path;
-}
-
-static void run_subprocess(char **argv) {
- // If -### is given, dump the subprocess's command line.
- if (opt_hash_hash_hash) {
- fprintf(stderr, "%s", argv[0]);
- for (int i = 1; argv[i]; i++)
- fprintf(stderr, " %s", argv[i]);
- fprintf(stderr, "\n");
- }
-
- if (fork() == 0) {
- // Child process. Run a new command.
- execvp(argv[0], argv);
- fprintf(stderr, "exec failed: %s: %s\n", argv[0], strerror(errno));
- _exit(1);
- }
-
- // Wait for the child process to finish.
- int status;
- while (wait(&status) > 0);
- if (status != 0)
- exit(1);
-}
-
-static void run_cc1(int argc, char **argv, char *input, char *output) {
- char **args = calloc(argc + 10, sizeof(char *));
- memcpy(args, argv, argc * sizeof(char *));
- args[argc++] = "-cc1";
-
- if (input) {
- args[argc++] = "-cc1-input";
- args[argc++] = input;
- }
-
- if (output) {
- args[argc++] = "-cc1-output";
- args[argc++] = output;
- }
-
- run_subprocess(args);
-}
-
-// Print tokens to stdout. Used for -E.
-static void print_tokens(Token *tok) {
- FILE *out = open_file(opt_o ? opt_o : "-");
-
- int line = 1;
- for (; tok->kind != TK_EOF; tok = tok->next) {
- if (line > 1 && tok->at_bol)
- fprintf(out, "\n");
- if (tok->has_space && !tok->at_bol)
- fprintf(out, " ");
- fprintf(out, "%.*s", tok->len, tok->loc);
- line++;
- }
- fprintf(out, "\n");
-}
-
-static bool in_std_include_path(char *path) {
- for (int i = 0; i < std_include_paths.len; i++) {
- char *dir = std_include_paths.data[i];
- int len = strlen(dir);
- if (strncmp(dir, path, len) == 0 && path[len] == '/')
- return true;
- }
- return false;
-}
-
-// If -M options is given, the compiler write a list of input files to
-// stdout in a format that "make" command can read. This feature is
-// used to automate file dependency management.
-static void print_dependencies(void) {
- char *path;
- if (opt_MF)
- path = opt_MF;
- else if (opt_MD)
- path = replace_extn(opt_o ? opt_o : base_file, ".d");
- else if (opt_o)
- path = opt_o;
- else
- path = "-";
-
- FILE *out = open_file(path);
- if (opt_MT)
- fprintf(out, "%s:", opt_MT);
- else
- fprintf(out, "%s:", quote_makefile(replace_extn(base_file, ".o")));
-
- File **files = get_input_files();
-
- for (int i = 0; files[i]; i++) {
- if (opt_MMD && in_std_include_path(files[i]->name))
- continue;
- fprintf(out, " \\\n %s", files[i]->name);
- }
-
- fprintf(out, "\n\n");
-
- if (opt_MP) {
- for (int i = 1; files[i]; i++) {
- if (opt_MMD && in_std_include_path(files[i]->name))
- continue;
- fprintf(out, "%s:\n\n", quote_makefile(files[i]->name));
- }
- }
-}
-
-static Token *must_tokenize_file(char *path) {
- Token *tok = tokenize_file(path);
- if (!tok)
- error("%s: %s", path, strerror(errno));
- return tok;
-}
-
-static Token *append_tokens(Token *tok1, Token *tok2) {
- if (!tok1 || tok1->kind == TK_EOF)
- return tok2;
-
- Token *t = tok1;
- while (t->next->kind != TK_EOF)
- t = t->next;
- t->next = tok2;
- return tok1;
-}
-
-static void cc1(void) {
- Token *tok = NULL;
-
- // Process -include option
- for (int i = 0; i < opt_include.len; i++) {
- char *incl = opt_include.data[i];
-
- char *path;
- if (file_exists(incl)) {
- path = incl;
- } else {
- path = search_include_paths(incl);
- if (!path)
- error("-include: %s: %s", incl, strerror(errno));
- }
-
- Token *tok2 = must_tokenize_file(path);
- tok = append_tokens(tok, tok2);
- }
-
- // Tokenize and parse.
- Token *tok2 = must_tokenize_file(base_file);
- tok = append_tokens(tok, tok2);
- tok = preprocess(tok);
-
- // If -M or -MD are given, print file dependencies.
- if (opt_M || opt_MD) {
- print_dependencies();
- if (opt_M)
- return;
- }
-
- // If -E is given, print out preprocessed C code as a result.
- if (opt_E) {
- print_tokens(tok);
- return;
- }
-
- Obj *prog = parse(tok);
-
- // Open a temporary output buffer.
- char *buf;
- size_t buflen;
- FILE *output_buf = open_memstream(&buf, &buflen);
-
- // Traverse the AST to emit assembly.
- codegen(prog, output_buf);
- fclose(output_buf);
-
- // Write the asembly text to a file.
- FILE *out = open_file(output_file);
- fwrite(buf, buflen, 1, out);
- fclose(out);
-}
-
-static void assemble(char *input, char *output) {
- char *cmd[] = {"as", "-c", input, "-o", output, NULL};
- run_subprocess(cmd);
-}
-
-static char *find_file(char *pattern) {
- char *path = NULL;
- glob_t buf = {};
- glob(pattern, 0, NULL, &buf);
- if (buf.gl_pathc > 0)
- path = strdup(buf.gl_pathv[buf.gl_pathc - 1]);
- globfree(&buf);
- return path;
-}
-
-// Returns true if a given file exists.
-bool file_exists(char *path) {
- struct stat st;
- return !stat(path, &st);
-}
-
-static char *find_libpath(void) {
- if (file_exists("/usr/lib/x86_64-linux-gnu/crti.o"))
- return "/usr/lib/x86_64-linux-gnu";
- if (file_exists("/usr/lib64/crti.o"))
- return "/usr/lib64";
- error("library path is not found");
-}
-
-static char *find_gcc_libpath(void) {
- char *paths[] = {
- "/usr/lib/gcc/x86_64-linux-gnu/*/crtbegin.o",
- "/usr/lib/gcc/x86_64-pc-linux-gnu/*/crtbegin.o", // For Gentoo
- "/usr/lib/gcc/x86_64-redhat-linux/*/crtbegin.o", // For Fedora
- };
-
- for (int i = 0; i < sizeof(paths) / sizeof(*paths); i++) {
- char *path = find_file(paths[i]);
- if (path)
- return dirname(path);
- }
-
- error("gcc library path is not found");
-}
-
-static void run_linker(StringArray *inputs, char *output) {
- StringArray arr = {};
-
- strarray_push(&arr, "ld");
- strarray_push(&arr, "-o");
- strarray_push(&arr, output);
- strarray_push(&arr, "-m");
- strarray_push(&arr, "elf_x86_64");
-
- char *libpath = find_libpath();
- char *gcc_libpath = find_gcc_libpath();
-
- if (opt_shared) {
- strarray_push(&arr, format("%s/crti.o", libpath));
- strarray_push(&arr, format("%s/crtbeginS.o", gcc_libpath));
- } else {
- strarray_push(&arr, format("%s/crt1.o", libpath));
- strarray_push(&arr, format("%s/crti.o", libpath));
- strarray_push(&arr, format("%s/crtbegin.o", gcc_libpath));
- }
-
- strarray_push(&arr, format("-L%s", gcc_libpath));
- strarray_push(&arr, "-L/usr/lib/x86_64-linux-gnu");
- strarray_push(&arr, "-L/usr/lib64");
- strarray_push(&arr, "-L/lib64");
- strarray_push(&arr, "-L/usr/lib/x86_64-linux-gnu");
- strarray_push(&arr, "-L/usr/lib/x86_64-pc-linux-gnu");
- strarray_push(&arr, "-L/usr/lib/x86_64-redhat-linux");
- strarray_push(&arr, "-L/usr/lib");
- strarray_push(&arr, "-L/lib");
-
- if (!opt_static) {
- strarray_push(&arr, "-dynamic-linker");
- strarray_push(&arr, "/lib64/ld-linux-x86-64.so.2");
- }
-
- for (int i = 0; i < ld_extra_args.len; i++)
- strarray_push(&arr, ld_extra_args.data[i]);
-
- for (int i = 0; i < inputs->len; i++)
- strarray_push(&arr, inputs->data[i]);
-
- if (opt_static) {
- strarray_push(&arr, "--start-group");
- strarray_push(&arr, "-lgcc");
- strarray_push(&arr, "-lgcc_eh");
- strarray_push(&arr, "-lc");
- strarray_push(&arr, "--end-group");
- } else {
- strarray_push(&arr, "-lc");
- strarray_push(&arr, "-lgcc");
- strarray_push(&arr, "--as-needed");
- strarray_push(&arr, "-lgcc_s");
- strarray_push(&arr, "--no-as-needed");
- }
-
- if (opt_shared)
- strarray_push(&arr, format("%s/crtendS.o", gcc_libpath));
- else
- strarray_push(&arr, format("%s/crtend.o", gcc_libpath));
-
- strarray_push(&arr, format("%s/crtn.o", libpath));
- strarray_push(&arr, NULL);
-
- run_subprocess(arr.data);
-}
-
-static FileType get_file_type(char *filename) {
- if (opt_x != FILE_NONE)
- return opt_x;
-
- if (endswith(filename, ".a"))
- return FILE_AR;
- if (endswith(filename, ".so"))
- return FILE_DSO;
- if (endswith(filename, ".o"))
- return FILE_OBJ;
- if (endswith(filename, ".c"))
- return FILE_C;
- if (endswith(filename, ".s"))
- return FILE_ASM;
-
- error("<command line>: unknown file extension: %s", filename);
-}
-
-int main(int argc, char **argv) {
- atexit(cleanup);
- init_macros();
- parse_args(argc, argv);
-
- if (opt_cc1) {
- add_default_include_paths(argv[0]);
- cc1();
- return 0;
- }
-
- if (input_paths.len > 1 && opt_o && (opt_c || opt_S | opt_E))
- error("cannot specify '-o' with '-c,' '-S' or '-E' with multiple files");
-
- StringArray ld_args = {};
-
- for (int i = 0; i < input_paths.len; i++) {
- char *input = input_paths.data[i];
-
- if (!strncmp(input, "-l", 2)) {
- strarray_push(&ld_args, input);
- continue;
- }
-
- if (!strncmp(input, "-Wl,", 4)) {
- char *s = strdup(input + 4);
- char *arg = strtok(s, ",");
- while (arg) {
- strarray_push(&ld_args, arg);
- arg = strtok(NULL, ",");
- }
- continue;
- }
-
- char *output;
- if (opt_o)
- output = opt_o;
- else if (opt_S)
- output = replace_extn(input, ".s");
- else
- output = replace_extn(input, ".o");
-
- FileType type = get_file_type(input);
-
- // Handle .o or .a
- if (type == FILE_OBJ || type == FILE_AR || type == FILE_DSO) {
- strarray_push(&ld_args, input);
- continue;
- }
-
- // Handle .s
- if (type == FILE_ASM) {
- if (!opt_S)
- assemble(input, output);
- continue;
- }
-
- assert(type == FILE_C);
-
- // Just preprocess
- if (opt_E || opt_M) {
- run_cc1(argc, argv, input, NULL);
- continue;
- }
-
- // Compile
- if (opt_S) {
- run_cc1(argc, argv, input, output);
- continue;
- }
-
- // Compile and assemble
- if (opt_c) {
- char *tmp = create_tmpfile();
- run_cc1(argc, argv, input, tmp);
- assemble(tmp, output);
- continue;
- }
-
- // Compile, assemble and link
- char *tmp1 = create_tmpfile();
- char *tmp2 = create_tmpfile();
- run_cc1(argc, argv, input, tmp1);
- assemble(tmp1, tmp2);
- strarray_push(&ld_args, tmp2);
- continue;
- }
-
- if (ld_args.len > 0)
- run_linker(&ld_args, opt_o ? opt_o : "a.out");
- return 0;
-}