mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-14 07:38:42 +00:00
573 lines
15 KiB
C++
573 lines
15 KiB
C++
#include <iostream>
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#include <cstdio>
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#include <cstdlib>
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#include <unistd.h>
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#include <asm/unistd.h>
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#include <sys/ptrace.h>
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#include <sys/wait.h>
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#include <sys/resource.h>
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#include <sys/user.h>
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#include <fcntl.h>
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#include <cstring>
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#include <string>
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#include <vector>
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#include <set>
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#include <argp.h>
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#include "uoj_env.h"
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using namespace std;
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struct RunResult {
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int result;
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int ust;
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int usm;
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int exit_code;
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RunResult(int _result, int _ust = -1, int _usm = -1, int _exit_code = -1)
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: result(_result), ust(_ust), usm(_usm), exit_code(_exit_code) {
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if (result != RS_AC) {
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ust = -1, usm = -1;
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}
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}
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};
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struct RunProgramConfig
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{
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int time_limit;
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int real_time_limit;
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int memory_limit;
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int output_limit;
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int stack_limit;
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string input_file_name;
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string output_file_name;
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string error_file_name;
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string result_file_name;
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string work_path;
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string type;
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vector<string> extra_readable_files;
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vector<string> extra_writable_files;
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bool allow_proc;
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bool safe_mode;
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bool need_show_trace_details;
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string program_name;
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string program_basename;
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vector<string> argv;
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};
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int put_result(string result_file_name, RunResult res) {
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FILE *f;
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if (result_file_name == "stdout") {
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f = stdout;
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} else if (result_file_name == "stderr") {
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f = stderr;
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} else {
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f = fopen(result_file_name.c_str(), "w");
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}
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fprintf(f, "%d %d %d %d\n", res.result, res.ust, res.usm, res.exit_code);
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if (f != stdout && f != stderr) {
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fclose(f);
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}
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if (res.result == RS_JGF) {
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return 1;
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} else {
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return 0;
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}
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}
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char self_path[PATH_MAX + 1] = {};
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#include "run_program_conf.h"
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argp_option run_program_argp_options[] =
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{
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{"tl" , 'T', "TIME_LIMIT" , 0, "Set time limit (in second)" , 1},
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{"rtl" , 'R', "TIME_LIMIT" , 0, "Set real time limit (in second)" , 2},
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{"ml" , 'M', "MEMORY_LIMIT", 0, "Set memory limit (in mb)" , 3},
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{"ol" , 'O', "OUTPUT_LIMIT", 0, "Set output limit (in mb)" , 4},
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{"sl" , 'S', "STACK_LIMIT" , 0, "Set stack limit (in mb)" , 5},
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{"in" , 'i', "IN" , 0, "Set input file name" , 6},
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{"out" , 'o', "OUT" , 0, "Set output file name" , 7},
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{"err" , 'e', "ERR" , 0, "Set error file name" , 8},
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{"work-path" , 'w', "WORK_PATH" , 0, "Set the work path of the program" , 9},
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{"type" , 't', "TYPE" , 0, "Set the program type (for some program such as python)", 10},
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{"res" , 'r', "RESULT_FILE" , 0, "Set the file name for outputing the result ", 10},
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{"add-readable" , 500, "FILE" , 0, "Add a readable file" , 11},
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{"add-writable" , 505, "FILE" , 0, "Add a writable file" , 11},
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{"unsafe" , 501, 0 , 0, "Don't check dangerous syscalls" , 12},
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{"show-trace-details" , 502, 0 , 0, "Show trace details" , 13},
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{"allow-proc" , 503, 0 , 0, "Allow fork, exec... etc." , 14},
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{"add-readable-raw" , 504, "FILE" , 0, "Add a readable (don't transform to its real path)" , 15},
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{"add-writable-raw" , 506, "FILE" , 0, "Add a writable (don't transform to its real path)" , 15},
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{0}
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};
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error_t run_program_argp_parse_opt (int key, char *arg, struct argp_state *state)
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{
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RunProgramConfig *config = (RunProgramConfig*)state->input;
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switch (key)
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{
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case 'T':
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config->time_limit = atoi(arg);
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break;
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case 'R':
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config->real_time_limit = atoi(arg);
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break;
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case 'M':
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config->memory_limit = atoi(arg);
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break;
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case 'O':
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config->output_limit = atoi(arg);
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break;
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case 'S':
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config->stack_limit = atoi(arg);
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break;
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case 'i':
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config->input_file_name = arg;
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break;
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case 'o':
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config->output_file_name = arg;
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break;
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case 'e':
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config->error_file_name = arg;
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break;
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case 'w':
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config->work_path = realpath(arg);
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if (config->work_path.empty()) {
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argp_usage(state);
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}
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break;
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case 'r':
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config->result_file_name = arg;
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break;
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case 't':
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config->type = arg;
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break;
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case 500:
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config->extra_readable_files.push_back(realpath(arg));
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break;
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case 501:
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config->safe_mode = false;
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break;
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case 502:
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config->need_show_trace_details = true;
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break;
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case 503:
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config->allow_proc = true;
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break;
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case 504:
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config->extra_readable_files.push_back(arg);
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break;
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case 505:
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config->extra_writable_files.push_back(realpath(arg));
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break;
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case 506:
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config->extra_writable_files.push_back(arg);
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break;
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case ARGP_KEY_ARG:
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config->argv.push_back(arg);
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for (int i = state->next; i < state->argc; i++) {
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config->argv.push_back(state->argv[i]);
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}
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state->next = state->argc;
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break;
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case ARGP_KEY_END:
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if (state->arg_num == 0) {
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argp_usage(state);
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}
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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char run_program_argp_args_doc[] = "program arg1 arg2 ...";
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char run_program_argp_doc[] = "run_program: a tool to run program safely";
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argp run_program_argp = {
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run_program_argp_options,
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run_program_argp_parse_opt,
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run_program_argp_args_doc,
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run_program_argp_doc
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};
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RunProgramConfig run_program_config;
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void parse_args(int argc, char **argv) {
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run_program_config.time_limit = 1;
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run_program_config.real_time_limit = -1;
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run_program_config.memory_limit = 256;
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run_program_config.output_limit = 64;
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run_program_config.stack_limit = 1024;
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run_program_config.input_file_name = "stdin";
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run_program_config.output_file_name = "stdout";
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run_program_config.error_file_name = "stderr";
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run_program_config.work_path = "";
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run_program_config.result_file_name = "stdout";
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run_program_config.type = "default";
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run_program_config.safe_mode = true;
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run_program_config.need_show_trace_details = false;
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run_program_config.allow_proc = false;
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argp_parse(&run_program_argp, argc, argv, ARGP_NO_ARGS | ARGP_IN_ORDER, 0, &run_program_config);
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if (run_program_config.real_time_limit == -1)
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run_program_config.real_time_limit = run_program_config.time_limit + 2;
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run_program_config.stack_limit = min(run_program_config.stack_limit, run_program_config.memory_limit);
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if (!run_program_config.work_path.empty()) {
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if (chdir(run_program_config.work_path.c_str()) == -1) {
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exit(put_result(run_program_config.result_file_name, RS_JGF));
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}
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}
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run_program_config.program_name = realpath(run_program_config.argv[0]);
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if (run_program_config.work_path.empty()) {
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run_program_config.work_path = dirname(run_program_config.program_name);
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run_program_config.program_basename = basename(run_program_config.program_name);
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run_program_config.argv[0] = "./" + run_program_config.program_basename;
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if (chdir(run_program_config.work_path.c_str()) == -1) {
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exit(put_result(run_program_config.result_file_name, RS_JGF));
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}
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}
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if (run_program_config.type == "python2") {
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string pre[4] = {"/usr/bin/python2.7", "-E", "-s", "-B"};
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run_program_config.argv.insert(run_program_config.argv.begin(), pre, pre + 4);
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} else if (run_program_config.type == "python3") {
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string pre[3] = {"/usr/bin/python3.8", "-I", "-B"};
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run_program_config.argv.insert(run_program_config.argv.begin(), pre, pre + 3);
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}
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}
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void set_limit(int r, int rcur, int rmax = -1) {
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if (rmax == -1)
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rmax = rcur;
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struct rlimit l;
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if (getrlimit(r, &l) == -1) {
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exit(55);
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}
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l.rlim_cur = rcur;
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l.rlim_max = rmax;
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if (setrlimit(r, &l) == -1) {
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exit(55);
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}
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}
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void run_child() {
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set_limit(RLIMIT_CPU, run_program_config.time_limit, run_program_config.real_time_limit);
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set_limit(RLIMIT_FSIZE, run_program_config.output_limit << 20);
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set_limit(RLIMIT_STACK, run_program_config.stack_limit << 20);
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if (run_program_config.input_file_name != "stdin") {
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if (freopen(run_program_config.input_file_name.c_str(), "r", stdin) == NULL) {
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exit(11);
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}
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}
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if (run_program_config.output_file_name != "stdout" && run_program_config.output_file_name != "stderr") {
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if (freopen(run_program_config.output_file_name.c_str(), "w", stdout) == NULL) {
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exit(12);
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}
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}
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if (run_program_config.error_file_name != "stderr") {
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if (run_program_config.error_file_name == "stdout") {
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if (dup2(1, 2) == -1) {
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exit(13);
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}
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} else {
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if (freopen(run_program_config.error_file_name.c_str(), "w", stderr) == NULL) {
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exit(14);
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}
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}
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if (run_program_config.output_file_name == "stderr") {
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if (dup2(2, 1) == -1) {
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exit(15);
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}
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}
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}
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char *env_path_str = getenv("PATH");
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char *env_lang_str = getenv("LANG");
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char *env_shell_str = getenv("SHELL");
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string env_path = env_path_str ? env_path_str : "";
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string env_lang = env_lang_str ? env_lang_str : "";
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string env_shell = env_shell_str ? env_shell_str : "";
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clearenv();
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setenv("USER", "poor_program", 1);
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setenv("LOGNAME", "poor_program", 1);
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setenv("HOME", run_program_config.work_path.c_str(), 1);
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if (env_lang_str) {
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setenv("LANG", env_lang.c_str(), 1);
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}
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if (env_path_str) {
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setenv("PATH", env_path.c_str(), 1);
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}
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setenv("PWD", run_program_config.work_path.c_str(), 1);
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if (env_shell_str) {
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setenv("SHELL", env_shell.c_str(), 1);
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}
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char **program_c_argv = new char*[run_program_config.argv.size() + 1];
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for (size_t i = 0; i < run_program_config.argv.size(); i++) {
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program_c_argv[i] = new char[run_program_config.argv[i].size() + 1];
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strcpy(program_c_argv[i], run_program_config.argv[i].c_str());
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}
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program_c_argv[run_program_config.argv.size()] = NULL;
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if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) == -1) {
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exit(16);
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}
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if (execv(program_c_argv[0], program_c_argv) == -1) {
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exit(17);
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}
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}
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const int MaxNRPChildren = 50;
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struct rp_child_proc {
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pid_t pid;
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int mode;
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};
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int n_rp_children;
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pid_t rp_timer_pid;
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rp_child_proc rp_children[MaxNRPChildren];
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int rp_children_pos(pid_t pid) {
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for (int i = 0; i < n_rp_children; i++) {
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if (rp_children[i].pid == pid) {
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return i;
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}
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}
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return -1;
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}
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int rp_children_add(pid_t pid) {
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if (n_rp_children == MaxNRPChildren) {
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return -1;
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}
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rp_children[n_rp_children].pid = pid;
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rp_children[n_rp_children].mode = -1;
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n_rp_children++;
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return 0;
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}
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void rp_children_del(pid_t pid) {
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int new_n = 0;
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for (int i = 0; i < n_rp_children; i++) {
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if (rp_children[i].pid != pid) {
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rp_children[new_n++] = rp_children[i];
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}
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}
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n_rp_children = new_n;
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}
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void stop_child(pid_t pid) {
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kill(pid, SIGKILL);
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}
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void stop_all() {
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kill(rp_timer_pid, SIGKILL);
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for (int i = 0; i < n_rp_children; i++) {
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kill(rp_children[i].pid, SIGKILL);
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}
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}
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RunResult trace_children() {
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rp_timer_pid = fork();
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if (rp_timer_pid == -1) {
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stop_all();
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return RunResult(RS_JGF);
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} else if (rp_timer_pid == 0) {
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struct timespec ts;
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ts.tv_sec = run_program_config.real_time_limit;
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ts.tv_nsec = 0;
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nanosleep(&ts, NULL);
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exit(0);
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}
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if (run_program_config.need_show_trace_details) {
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cerr << "timerpid " << rp_timer_pid << endl;
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}
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pid_t prev_pid = -1;
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while (true) {
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int stat = 0;
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int sig = 0;
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struct rusage ruse;
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pid_t pid = wait4(-1, &stat, __WALL, &ruse);
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if (run_program_config.need_show_trace_details) {
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if (prev_pid != pid) {
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cerr << "----------" << pid << "----------" << endl;
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}
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prev_pid = pid;
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}
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if (pid == rp_timer_pid) {
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if (WIFEXITED(stat) || WIFSIGNALED(stat)) {
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stop_all();
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return RunResult(RS_TLE);
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}
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continue;
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}
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int p = rp_children_pos(pid);
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if (p == -1) {
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if (run_program_config.need_show_trace_details) {
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fprintf(stderr, "new_proc %lld\n", (long long int)pid);
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}
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if (rp_children_add(pid) == -1) {
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stop_child(pid);
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stop_all();
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return RunResult(RS_DGS);
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}
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p = n_rp_children - 1;
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}
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int usertim = ruse.ru_utime.tv_sec * 1000 + ruse.ru_utime.tv_usec / 1000;
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int usermem = ruse.ru_maxrss;
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if (usertim > run_program_config.time_limit * 1000) {
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stop_all();
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return RunResult(RS_TLE);
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}
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if (usermem > run_program_config.memory_limit * 1024) {
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stop_all();
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return RunResult(RS_MLE);
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}
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if (WIFEXITED(stat)) {
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if (run_program_config.need_show_trace_details) {
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fprintf(stderr, "exit : %d\n", WEXITSTATUS(stat));
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}
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if (rp_children[0].mode == -1) {
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stop_all();
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return RunResult(RS_JGF, -1, -1, WEXITSTATUS(stat));
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} else {
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if (pid == rp_children[0].pid) {
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stop_all();
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return RunResult(RS_AC, usertim, usermem, WEXITSTATUS(stat));
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} else {
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rp_children_del(pid);
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continue;
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}
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}
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}
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if (WIFSIGNALED(stat)) {
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if (run_program_config.need_show_trace_details) {
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fprintf(stderr, "sig exit : %d\n", WTERMSIG(stat));
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}
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if (pid == rp_children[0].pid) {
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switch(WTERMSIG(stat)) {
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case SIGXCPU: // nearly impossible
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stop_all();
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return RunResult(RS_TLE);
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case SIGXFSZ:
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stop_all();
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return RunResult(RS_OLE);
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default:
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stop_all();
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return RunResult(RS_RE);
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}
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} else {
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rp_children_del(pid);
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continue;
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}
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}
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if (WIFSTOPPED(stat)) {
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sig = WSTOPSIG(stat);
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if (rp_children[p].mode == -1) {
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if ((p == 0 && sig == SIGTRAP) || (p != 0 && sig == SIGSTOP)) {
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if (p == 0) {
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int ptrace_opt = PTRACE_O_EXITKILL | PTRACE_O_TRACESYSGOOD;
|
|
if (run_program_config.safe_mode) {
|
|
ptrace_opt |= PTRACE_O_TRACECLONE | PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK;
|
|
ptrace_opt |= PTRACE_O_TRACEEXEC;
|
|
}
|
|
if (ptrace(PTRACE_SETOPTIONS, pid, NULL, ptrace_opt) == -1) {
|
|
stop_all();
|
|
return RunResult(RS_JGF);
|
|
}
|
|
}
|
|
sig = 0;
|
|
}
|
|
rp_children[p].mode = 0;
|
|
} else if (sig == (SIGTRAP | 0x80)) {
|
|
if (rp_children[p].mode == 0) {
|
|
if (run_program_config.safe_mode) {
|
|
if (!check_safe_syscall(pid, run_program_config.need_show_trace_details)) {
|
|
stop_all();
|
|
return RunResult(RS_DGS);
|
|
}
|
|
}
|
|
rp_children[p].mode = 1;
|
|
} else {
|
|
if (run_program_config.safe_mode) {
|
|
on_syscall_exit(pid, run_program_config.need_show_trace_details);
|
|
}
|
|
rp_children[p].mode = 0;
|
|
}
|
|
|
|
sig = 0;
|
|
} else if (sig == SIGTRAP) {
|
|
switch ((stat >> 16) & 0xffff) {
|
|
case PTRACE_EVENT_CLONE:
|
|
case PTRACE_EVENT_FORK:
|
|
case PTRACE_EVENT_VFORK:
|
|
sig = 0;
|
|
break;
|
|
case PTRACE_EVENT_EXEC:
|
|
rp_children[p].mode = 1;
|
|
sig = 0;
|
|
break;
|
|
case 0:
|
|
break;
|
|
default:
|
|
stop_all();
|
|
return RunResult(RS_JGF);
|
|
}
|
|
}
|
|
|
|
if (sig != 0) {
|
|
if (run_program_config.need_show_trace_details) {
|
|
fprintf(stderr, "sig : %d\n", sig);
|
|
}
|
|
}
|
|
|
|
switch(sig) {
|
|
case SIGXCPU:
|
|
stop_all();
|
|
return RunResult(RS_TLE);
|
|
case SIGXFSZ:
|
|
stop_all();
|
|
return RunResult(RS_OLE);
|
|
}
|
|
}
|
|
|
|
ptrace(PTRACE_SYSCALL, pid, NULL, sig);
|
|
}
|
|
}
|
|
|
|
RunResult run_parent(pid_t pid) {
|
|
init_conf(run_program_config);
|
|
|
|
n_rp_children = 0;
|
|
|
|
rp_children_add(pid);
|
|
return trace_children();
|
|
}
|
|
int main(int argc, char **argv) {
|
|
self_path[readlink("/proc/self/exe", self_path, PATH_MAX)] = '\0';
|
|
parse_args(argc, argv);
|
|
|
|
pid_t pid = fork();
|
|
if (pid == -1) {
|
|
return put_result(run_program_config.result_file_name, RS_JGF);
|
|
} else if (pid == 0) {
|
|
run_child();
|
|
} else {
|
|
return put_result(run_program_config.result_file_name, run_parent(pid));
|
|
}
|
|
return put_result(run_program_config.result_file_name, RS_JGF);
|
|
}
|