NJU-ProjectN/nemu ics2023 initialized

NJU-ProjectN/nemu eb63cf3568dbf4e0c3c6ef462e6ec685550fabbc Merge pull request #76 from rijuyuezhu/master

nemu/tools/qemu-diff/src/diff-test.c

@@ -0,0 +1,99 @@
+/***************************************************************************************
+* 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 "common.h"
+#include <difftest-def.h>
+#include <sys/prctl.h>
+#include <signal.h>
+
+bool gdb_connect_qemu(int);
+bool gdb_memcpy_to_qemu(uint32_t, void *, int);
+bool gdb_getregs(union isa_gdb_regs *);
+bool gdb_setregs(union isa_gdb_regs *);
+bool gdb_si();
+void gdb_exit();
+
+void init_isa();
+
+__EXPORT void difftest_memcpy(paddr_t addr, void *buf, size_t n, bool direction) {
+  assert(direction == DIFFTEST_TO_REF);
+  if (direction == DIFFTEST_TO_REF) {
+    bool ok = gdb_memcpy_to_qemu(addr, buf, n);
+    assert(ok == 1);
+  }
+}
+
+__EXPORT void difftest_regcpy(void *dut, bool direction) {
+  union isa_gdb_regs qemu_r;
+  gdb_getregs(&qemu_r);
+  if (direction == DIFFTEST_TO_REF) {
+    memcpy(&qemu_r, dut, DIFFTEST_REG_SIZE);
+    gdb_setregs(&qemu_r);
+  } else {
+    memcpy(dut, &qemu_r, DIFFTEST_REG_SIZE);
+  }
+}
+
+__EXPORT void difftest_exec(uint64_t n) {
+  while (n --) gdb_si();
+}
+
+__EXPORT void difftest_init(int port) {
+  char buf[32];
+  sprintf(buf, "tcp::%d", port);
+
+  int ppid_before_fork = getpid();
+  int pid = fork();
+  if (pid == -1) {
+    perror("fork");
+    assert(0);
+  }
+  else if (pid == 0) {
+    // child
+
+    // install a parent death signal in the chlid
+    int r = prctl(PR_SET_PDEATHSIG, SIGTERM);
+    if (r == -1) {
+      perror("prctl error");
+      assert(0);
+    }
+
+    if (getppid() != ppid_before_fork) {
+      printf("parent has died!\n");
+      assert(0);
+    }
+
+    close(STDIN_FILENO);
+    execlp(ISA_QEMU_BIN, ISA_QEMU_BIN, ISA_QEMU_ARGS "-S", "-gdb", buf, "-nographic",
+        "-serial", "none", "-monitor", "none", NULL);
+    perror("exec");
+    assert(0);
+  }
+  else {
+    // father
+
+    gdb_connect_qemu(port);
+    printf("Connect to QEMU with %s successfully\n", buf);
+
+    atexit(gdb_exit);
+
+    init_isa();
+  }
+}
+
+__EXPORT void difftest_raise_intr(uint64_t NO) {
+  printf("raise_intr is not supported\n");
+  assert(0);
+}