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NJU-ProjectN/nemu eb63cf3568dbf4e0c3c6ef462e6ec685550fabbc Merge pull request #76 from rijuyuezhu/master
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xinyangli 2023-12-21 00:20:36 +08:00
parent 1efe03efb9
commit 2824efad33
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nemu/tools/gen-expr/.gitignore vendored Normal file
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.code.c

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nemu/tools/gen-expr/Makefile Normal file
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#***************************************************************************************
# Copyright (c) 2014-2022 Zihao Yu, Nanjing University
#
# NEMU is licensed under Mulan PSL v2.
# You can use this software according to the terms and conditions of the Mulan PSL v2.
# You may obtain a copy of Mulan PSL v2 at:
# http://license.coscl.org.cn/MulanPSL2
#
# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
#
# See the Mulan PSL v2 for more details.
#**************************************************************************************/
NAME = gen-expr
SRCS = gen-expr.c
include $(NEMU_HOME)/scripts/build.mk

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nemu/tools/gen-expr/gen-expr.c Normal file
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/***************************************************************************************
* Copyright (c) 2014-2022 Zihao Yu, Nanjing University
*
* NEMU is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
* http://license.coscl.org.cn/MulanPSL2
*
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
*
* See the Mulan PSL v2 for more details.
***************************************************************************************/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <assert.h>
#include <string.h>
// this should be enough
static char buf[65536] = {};
static char code_buf[65536 + 128] = {}; // a little larger than `buf`
static char *code_format =
"#include <stdio.h>\n"
"int main() { "
" unsigned result = %s; "
" printf(\"%%u\", result); "
" return 0; "
"}";
static void gen_rand_expr() {
buf[0] = '\0';
}
int main(int argc, char *argv[]) {
int seed = time(0);
srand(seed);
int loop = 1;
if (argc > 1) {
sscanf(argv[1], "%d", &loop);
}
int i;
for (i = 0; i < loop; i ++) {
gen_rand_expr();
sprintf(code_buf, code_format, buf);
FILE *fp = fopen("/tmp/.code.c", "w");
assert(fp != NULL);
fputs(code_buf, fp);
fclose(fp);
int ret = system("gcc /tmp/.code.c -o /tmp/.expr");
if (ret != 0) continue;
fp = popen("/tmp/.expr", "r");
assert(fp != NULL);
int result;
ret = fscanf(fp, "%d", &result);
pclose(fp);
printf("%u %s\n", result, buf);
}
return 0;
}