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pyexec.c

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  • main.c 12.96 KiB
    /*
     * This file is part of the Micro Python project, http://micropython.org/
     *
     * The MIT License (MIT)
     *
     * Copyright (c) 2013, 2014 Damien P. George
     *
     * 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 the Software without restriction, including without limitation the rights
     * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     * copies of the Software, and to permit persons to whom the Software is
     * furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice shall be included in
     * all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     * THE SOFTWARE.
     */
    
    #include <stdint.h>
    #include <stdbool.h>
    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #include <stdarg.h>
    #include <ctype.h>
    #include <sys/stat.h>
    #include <sys/types.h>
    #include <errno.h>
    
    #include "mpconfig.h"
    #include "nlr.h"
    #include "misc.h"
    #include "qstr.h"
    #include "lexer.h"
    #include "lexerunix.h"
    #include "parse.h"
    #include "obj.h"
    #include "parsehelper.h"
    #include "compile.h"
    #include "runtime0.h"
    #include "runtime.h"
    #include "repl.h"
    #include "gc.h"
    #include "genhdr/py-version.h"
    #include "input.h"
    #include "stackctrl.h"
    
    // Command line options, with their defaults
    bool compile_only = false;
    uint emit_opt = MP_EMIT_OPT_NONE;
    uint mp_verbose_flag;
    
    #if MICROPY_ENABLE_GC
    // Heap size of GC heap (if enabled)
    // Make it larger on a 64 bit machine, because pointers are larger.
    long heap_size = 128*1024 * (sizeof(mp_uint_t) / 4);
    #endif
    
    void microsocket_init();
    void time_init();
    void ffi_init();
    
    // returns standard error codes: 0 for success, 1 for all other errors
    STATIC int execute_from_lexer(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
        if (lex == NULL) {
            return 1;
        }
    
        if (0) {
            // just tokenise
            while (!mp_lexer_is_kind(lex, MP_TOKEN_END)) {
                mp_token_show(mp_lexer_cur(lex));
                mp_lexer_to_next(lex);
            }
            mp_lexer_free(lex);
            return 0;
        }
    
        mp_parse_error_kind_t parse_error_kind;
        mp_parse_node_t pn = mp_parse(lex, input_kind, &parse_error_kind);
    
        if (pn == MP_PARSE_NODE_NULL) {
            // parse error
            mp_parse_show_exception(lex, parse_error_kind);
            mp_lexer_free(lex);
            return 1;
        }
    
        qstr source_name = mp_lexer_source_name(lex);
        #if MICROPY_PY___FILE__
        if (input_kind == MP_PARSE_FILE_INPUT) {
            mp_store_global(MP_QSTR___file__, MP_OBJ_NEW_QSTR(source_name));
        }
        #endif
        mp_lexer_free(lex);
    
        /*
        printf("----------------\n");
        mp_parse_node_print(pn, 0);
        printf("----------------\n");
        */
    
        mp_obj_t module_fun = mp_compile(pn, source_name, emit_opt, is_repl);
    
        if (module_fun == mp_const_none) {
            // compile error
            return 1;
        }
    
        if (compile_only) {
            return 0;
        }
    
        // execute it
        nlr_buf_t nlr;
        if (nlr_push(&nlr) == 0) {
            mp_call_function_0(module_fun);
            nlr_pop();
            return 0;
        } else {
            // uncaught exception
            // check for SystemExit
            mp_obj_t exc = (mp_obj_t)nlr.ret_val;
            if (mp_obj_is_subclass_fast(mp_obj_get_type(exc), &mp_type_SystemExit)) {
                exit(mp_obj_get_int(mp_obj_exception_get_value(exc)));
            }
            mp_obj_print_exception((mp_obj_t)nlr.ret_val);
            return 1;
        }
    }
    
    STATIC char *strjoin(const char *s1, int sep_char, const char *s2) {
        int l1 = strlen(s1);
        int l2 = strlen(s2);
        char *s = malloc(l1 + l2 + 2);
        memcpy(s, s1, l1);
        if (sep_char != 0) {
            s[l1] = sep_char;
            l1 += 1;
        }
        memcpy(s + l1, s2, l2);
        s[l1 + l2] = 0;
        return s;
    }
    
    STATIC void do_repl(void) {
        printf("Micro Python " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; " MICROPY_PY_SYS_PLATFORM " version\n");
    
        for (;;) {
            char *line = prompt(">>> ");
            if (line == NULL) {
                // EOF
                return;
            }
            while (mp_repl_continue_with_input(line)) {
                char *line2 = prompt("... ");
                if (line2 == NULL) {
                    break;
                }
                char *line3 = strjoin(line, '\n', line2);
                free(line);
                free(line2);
                line = line3;
            }
    
            mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line, strlen(line), false);
            execute_from_lexer(lex, MP_PARSE_SINGLE_INPUT, true);
            free(line);
        }
    }
    
    STATIC int do_file(const char *file) {
        mp_lexer_t *lex = mp_lexer_new_from_file(file);
        return execute_from_lexer(lex, MP_PARSE_FILE_INPUT, false);
    }
    
    STATIC int do_str(const char *str) {
        mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, str, strlen(str), false);
        return execute_from_lexer(lex, MP_PARSE_SINGLE_INPUT, false);
    }
    
    int usage(char **argv) {
        printf(
    "usage: %s [<opts>] [-X <implopt>] [-c <command>] [<filename>]\n"
    "Options:\n"
    "-v : verbose (trace various operations); can be multiple\n"
    "-O[N] : apply bytecode optimizations of level N\n"
    "\n"
    "Implementation specific options:\n", argv[0]
    );
        int impl_opts_cnt = 0;
        printf(
    "  compile-only                 -- parse and compile only\n"
    "  emit={bytecode,native,viper} -- set the default code emitter\n"
    );
        impl_opts_cnt++;
    #if MICROPY_ENABLE_GC
        printf(
    "  heapsize=<n> -- set the heap size for the GC (default %ld)\n"
    , heap_size);
        impl_opts_cnt++;
    #endif
    
        if (impl_opts_cnt == 0) {
            printf("  (none)\n");
        }
    
        return 1;
    }
    
    mp_obj_t mem_info(void) {
        printf("mem: total=%d, current=%d, peak=%d\n",
            m_get_total_bytes_allocated(), m_get_current_bytes_allocated(), m_get_peak_bytes_allocated());
        printf("stack: %u\n", mp_stack_usage());
    #if MICROPY_ENABLE_GC
        gc_dump_info();
    #endif
        return mp_const_none;
    }
    
    mp_obj_t qstr_info(void) {
        uint n_pool, n_qstr, n_str_data_bytes, n_total_bytes;
        qstr_pool_info(&n_pool, &n_qstr, &n_str_data_bytes, &n_total_bytes);
        printf("qstr pool: n_pool=%u, n_qstr=%u, n_str_data_bytes=%u, n_total_bytes=%u\n", n_pool, n_qstr, n_str_data_bytes, n_total_bytes);
        return mp_const_none;
    }
    
    // Process options which set interpreter init options
    void pre_process_options(int argc, char **argv) {
        for (int a = 1; a < argc; a++) {
            if (argv[a][0] == '-') {
                if (strcmp(argv[a], "-X") == 0) {
                    if (a + 1 >= argc) {
                        exit(usage(argv));
                    }
                    if (0) {
                    } else if (strcmp(argv[a + 1], "compile-only") == 0) {
                        compile_only = true;
                    } else if (strcmp(argv[a + 1], "emit=bytecode") == 0) {
                        emit_opt = MP_EMIT_OPT_BYTECODE;
                    } else if (strcmp(argv[a + 1], "emit=native") == 0) {
                        emit_opt = MP_EMIT_OPT_NATIVE_PYTHON;
                    } else if (strcmp(argv[a + 1], "emit=viper") == 0) {
                        emit_opt = MP_EMIT_OPT_VIPER;
    #if MICROPY_ENABLE_GC
                    } else if (strncmp(argv[a + 1], "heapsize=", sizeof("heapsize=") - 1) == 0) {
                        heap_size = strtol(argv[a + 1] + sizeof("heapsize=") - 1, NULL, 0);
    #endif
                    } else {
                        exit(usage(argv));
                    }
                    a++;
                }
            }
        }
    }
    
    #ifdef _WIN32
    #define PATHLIST_SEP_CHAR ';'
    #else
    #define PATHLIST_SEP_CHAR ':'
    #endif
    
    int main(int argc, char **argv) {
        mp_stack_set_limit(32768);
    
        pre_process_options(argc, argv);
    
    #if MICROPY_ENABLE_GC
        char *heap = malloc(heap_size);
        gc_init(heap, heap + heap_size);
    #endif
    
        mp_init();
    
        char *home = getenv("HOME");
        char *path = getenv("MICROPYPATH");
        if (path == NULL) {
            path = "~/.micropython/lib:/usr/lib/micropython";
        }
        uint path_num = 1; // [0] is for current dir (or base dir of the script)
        for (char *p = path; p != NULL; p = strchr(p, PATHLIST_SEP_CHAR)) {
            path_num++;
            if (p != NULL) {
                p++;
            }
        }
        mp_obj_list_init(mp_sys_path, path_num);
        mp_obj_t *path_items;
        mp_obj_list_get(mp_sys_path, &path_num, &path_items);
        path_items[0] = MP_OBJ_NEW_QSTR(MP_QSTR_);
        char *p = path;
        for (int i = 1; i < path_num; i++) {
            char *p1 = strchr(p, PATHLIST_SEP_CHAR);
            if (p1 == NULL) {
                p1 = p + strlen(p);
            }
            if (p[0] == '~' && p[1] == '/' && home != NULL) {
                // Expand standalone ~ to $HOME
                CHECKBUF(buf, PATH_MAX);
                CHECKBUF_APPEND(buf, home, strlen(home));
                CHECKBUF_APPEND(buf, p + 1, p1 - p - 1);
                path_items[i] = MP_OBJ_NEW_QSTR(qstr_from_strn(buf, CHECKBUF_LEN(buf)));
            } else {
                path_items[i] = MP_OBJ_NEW_QSTR(qstr_from_strn(p, p1 - p));
            }
            p = p1 + 1;
        }
    
        mp_obj_list_init(mp_sys_argv, 0);
    
        mp_store_name(qstr_from_str("mem_info"), mp_make_function_n(0, mem_info));
        mp_store_name(qstr_from_str("qstr_info"), mp_make_function_n(0, qstr_info));
    
        // Here is some example code to create a class and instance of that class.
        // First is the Python, then the C code.
        //
        // class TestClass:
        //     pass
        // test_obj = TestClass()
        // test_obj.attr = 42
        //
        // mp_obj_t test_class_type, test_class_instance;
        // test_class_type = mp_obj_new_type(QSTR_FROM_STR_STATIC("TestClass"), mp_const_empty_tuple, mp_obj_new_dict(0));
        // mp_store_name(QSTR_FROM_STR_STATIC("test_obj"), test_class_instance = mp_call_function_0(test_class_type));
        // mp_store_attr(test_class_instance, QSTR_FROM_STR_STATIC("attr"), mp_obj_new_int(42));
    
        /*
        printf("bytes:\n");
        printf("    total %d\n", m_get_total_bytes_allocated());
        printf("    cur   %d\n", m_get_current_bytes_allocated());
        printf("    peak  %d\n", m_get_peak_bytes_allocated());
        */
    
        const int NOTHING_EXECUTED = -2;
        int ret = NOTHING_EXECUTED;
        for (int a = 1; a < argc; a++) {
            if (argv[a][0] == '-') {
                if (strcmp(argv[a], "-c") == 0) {
                    if (a + 1 >= argc) {
                        return usage(argv);
                    }
                    ret = do_str(argv[a + 1]);
                    a += 1;
                } else if (strcmp(argv[a], "-X") == 0) {
                    a += 1;
                } else if (strcmp(argv[a], "-v") == 0) {
                    mp_verbose_flag++;
                } else if (strncmp(argv[a], "-O", 2) == 0) {
                    if (isdigit(argv[a][2])) {
                        mp_optimise_value = argv[a][2] & 0xf;
                    } else {
                        mp_optimise_value = 0;
                        for (char *p = argv[a] + 1; *p && *p == 'O'; p++, mp_optimise_value++);
                    }
                } else {
                    return usage(argv);
                }
            } else {
                char *pathbuf = malloc(PATH_MAX);
                char *basedir = realpath(argv[a], pathbuf);
                if (basedir == NULL) {
                    fprintf(stderr, "%s: can't open file '%s': [Errno %d] ", argv[0], argv[a], errno);
                    perror("");
                    // CPython exits with 2 in such case
                    ret = 2;
                    break;
                }
    
                // Set base dir of the script as first entry in sys.path
                char *p = strrchr(basedir, '/');
                path_items[0] = MP_OBJ_NEW_QSTR(qstr_from_strn(basedir, p - basedir));
                free(pathbuf);
    
                for (int i = a; i < argc; i++) {
                    mp_obj_list_append(mp_sys_argv, MP_OBJ_NEW_QSTR(qstr_from_str(argv[i])));
                }
                ret = do_file(argv[a]);
                break;
            }
        }
    
        if (ret == NOTHING_EXECUTED) {
            do_repl();
            ret = 0;
        }
    
        mp_deinit();
    
        //printf("total bytes = %d\n", m_get_total_bytes_allocated());
        return ret;
    }
    
    STATIC mp_obj_t mp_sys_exit(uint n_args, const mp_obj_t *args) {
        int rc = 0;
        if (n_args > 0) {
            rc = mp_obj_get_int(args[0]);
        }
        nlr_raise(mp_obj_new_exception_arg1(&mp_type_SystemExit, mp_obj_new_int(rc)));
    }
    MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_sys_exit_obj, 0, 1, mp_sys_exit);
    
    uint mp_import_stat(const char *path) {
        struct stat st;
        if (stat(path, &st) == 0) {
            if (S_ISDIR(st.st_mode)) {
                return MP_IMPORT_STAT_DIR;
            } else if (S_ISREG(st.st_mode)) {
                return MP_IMPORT_STAT_FILE;
            }
        }
        return MP_IMPORT_STAT_NO_EXIST;
    }
    
    int DEBUG_printf(const char *fmt, ...) {
        va_list ap;
        va_start(ap, fmt);
        int ret = vfprintf(stderr, fmt, ap);
        va_end(ap);
        return ret;
    }
    
    void nlr_jump_fail(void *val) {
        printf("FATAL: uncaught NLR %p\n", val);
        exit(1);
    }