> compile NEMU

221220000 张三
Linux zzy 5.15.146.1-microsoft-standard-WSL2 #1 SMP Thu Jan 11 04:09:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
 16:50:15 up 19:15,  2 users,  load average: 0.46, 0.30, 0.20

nemu/src/monitor/sdb/expr.c

@@ -167,6 +167,7 @@ int check_parentheses(const Token* arr, size_t p, size_t q) {
 word_t eval(const Token* arr, size_t p, size_t q, bool* success) {
   Assert (p >= 0 && q < nr_token, "invalid range on eval, "\
     "p = %"PRIuMAX", q = %"PRIuMAX"\n", p, q);
+
   int parten = check_parentheses(arr, p, q);
   if (parten == -1 || p > q) {
     *success = false;

nemu/src/monitor/sdb/sdb.c

@@ -170,10 +170,29 @@ void sdb_set_batch_mode() {
   is_batch_mode = true;
 }
 
+int test_expr() {
+  Log("test_expr");
+  uint32_t expect, res;
+  char buf[65536] = {0};
+  if (scanf("%d %s", &expect, buf));
+  res = expr(buf, NULL);
+  if (res == expect) {
+    printf("True  :");
+  } else {
+    printf("Failed:");
+  }
+  printf("%"PRIuLEAST32" : %"PRIuLEAST32"\n", expect, res);
+  return 0;
+}
+
 void sdb_mainloop() {
 #ifdef _TEST_SDB_MAIN_LOOP_
   Log("_TEST_SDB_MAIN_LOOP_");
 #endif
+#ifdef _TEST_EXPR_
+  return test_expr();
+#endif
+
 
   if (is_batch_mode) {
     cmd_c(NULL);

nemu/tools/gen-expr/gen-expr.c

@@ -31,8 +31,37 @@ static char *code_format =
 "  return 0; "
 "}";
 
+static inline int choose(int n) {
+  return rand() % n;
+}
+
+static int pos;
+#define _GEN(buf, pos, fmt, ...) (pos += snprintf(buf + pos, sizeof(buf) - pos, fmt, ##__VA_ARGS__))
+#define GEN(fmt, ...) _GEN(buf, pos, fmt, ##__VA_ARGS__)
+
+#define RAND_NUM_MAX 100
+#define GEN_RAND() GEN("%d", choose(RAND_NUM_MAX))
+#define GEN_OP() do{ \
+        switch (choose(4)) { \
+        case 0: GEN("+"); break; \
+        case 1: GEN("-"); break; \
+        case 2: GEN("*"); break; \
+        case 3: GEN("/"); break; \
+        } \
+      } while(0)
+
+static void _gen_rand_expr() {
+  switch (choose(3)) {
+    case 0: GEN_RAND(); break;
+    case 1: GEN("("); _gen_rand_expr(); GEN(")"); break;
+    default: _gen_rand_expr(); GEN_OP(); _gen_rand_expr(); break;
+  }
+}
+
 static void gen_rand_expr() {
   buf[0] = '\0';
+  pos = 0;
+  _gen_rand_expr();
 }
 
 int main(int argc, char *argv[]) {