add --random-file-fail-output argument to support redirect debug info to a file.

src/dnode/src/dnodeSystem.c

@@ -70,7 +70,13 @@ int32_t main(int32_t argc, char *argv[]) {
     }
 #endif
 #ifdef TAOS_RANDOM_FILE_FAIL
-    else if (strcmp(argv[i], "--random-file-fail-factor") == 0) {
+    else if (strcmp(argv[i], "--random-file-fail-output") == 0) {
+      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
+        taosSetRandomFileFailOutput(argv[++i]);
+      } else {
+        taosSetRandomFileFailOutput(NULL);
+      }
+    } else if (strcmp(argv[i], "--random-file-fail-factor") == 0) {
       if ( (i+1) < argc ) {
         int factor = atoi(argv[i+1]);
         printf("The factor of random failure is %d\n", factor);

src/util/inc/tfile.h

@@ -19,13 +19,14 @@
 #ifdef TAOS_RANDOM_FILE_FAIL
 
 void taosSetRandomFileFailFactor(int factor);
-ssize_t taos_tread(int fd, void *buf, size_t count);
-ssize_t taos_twrite(int fd, void *buf, size_t count);
-off_t taos_lseek(int fd, off_t offset, int whence);
+void taosSetRandomFileFailOutput(const char *path);
+ssize_t taos_tread(int fd, void *buf, size_t count, const char *file, uint32_t line);
+ssize_t taos_twrite(int fd, void *buf, size_t count, const char *file, uint32_t line);
+off_t taos_lseek(int fd, off_t offset, int whence, const char *file, uint32_t line);
 
-#define tread(fd, buf, count)  taos_tread(fd, buf, count)
-#define twrite(fd, buf, count)  taos_twrite(fd, buf, count)
-#define lseek(fd, offset, whence)  taos_lseek(fd, offset, whence)
+#define tread(fd, buf, count)  taos_tread(fd, buf, count, __FILE__, __LINE__)
+#define twrite(fd, buf, count)  taos_twrite(fd, buf, count, __FILE__, __LINE__)
+#define lseek(fd, offset, whence)  taos_lseek(fd, offset, whence, __FILE__, __LINE__)
 
 #endif  // TAOS_RANDOM_FILE_FAIL
 

src/util/src/tfile.c

@@ -29,14 +29,55 @@
 #ifdef TAOS_RANDOM_FILE_FAIL
 
 static int random_file_fail_factor = 20;
+static FILE *fpRandomFileFailOutput = NULL;
 
 void taosSetRandomFileFailFactor(int factor)
 {
   random_file_fail_factor = factor;
 }
+
+static void close_random_file_fail_output()
+{
+  if (fpRandomFileFailOutput != NULL) {
+    if (fpRandomFileFailOutput != stdout) {
+      fclose(fpRandomFileFailOutput);
+    }
+    fpRandomFileFailOutput = NULL;
+  }
+}
+
+static void random_file_fail_output_sig(int sig)
+{
+  fprintf(fpRandomFileFailOutput, "signal %d received.\n", sig);
+
+  struct sigaction act = {0};
+  act.sa_handler = SIG_DFL;
+  sigaction(sig, &act, NULL);
+
+  close_random_file_fail_output();
+  exit(EXIT_FAILURE);
+}
+
+void taosSetRandomFileFailOutput(const char *path)
+{
+  if (path == NULL) {
+    fpRandomFileFailOutput = stdout;
+  } else if ((fpRandomFileFailOutput = fopen(path, "w")) != NULL) {
+    atexit(close_random_file_fail_output);
+  } else {
+    printf("failed to open random file fail log file '%s', errno=%d\n", path, errno);
+    return;
+  }
+
+  struct sigaction act = {0};
+  act.sa_handler = random_file_fail_output_sig;
+  sigaction(SIGFPE, &act, NULL);
+  sigaction(SIGSEGV, &act, NULL);
+  sigaction(SIGILL, &act, NULL);
+}
 #endif
 
-ssize_t taos_tread(int fd, void *buf, size_t count)
+ssize_t taos_tread(int fd, void *buf, size_t count, const char *file, uint32_t line)
 {
 #ifdef TAOS_RANDOM_FILE_FAIL
   if (random_file_fail_factor > 0) {
@@ -49,7 +90,7 @@ ssize_t taos_tread(int fd, void *buf, size_t count)
   return tread(fd, buf, count);
 }
 
-ssize_t taos_twrite(int fd, void *buf, size_t count)
+ssize_t taos_twrite(int fd, void *buf, size_t count, const char *file, uint32_t line)
 {
 #ifdef TAOS_RANDOM_FILE_FAIL
   if (random_file_fail_factor > 0) {
@@ -62,7 +103,7 @@ ssize_t taos_twrite(int fd, void *buf, size_t count)
   return twrite(fd, buf, count);
 }
 
-off_t taos_lseek(int fd, off_t offset, int whence)
+off_t taos_lseek(int fd, off_t offset, int whence, const char *file, uint32_t line)
 {
 #ifdef TAOS_RANDOM_FILE_FAIL
   if (random_file_fail_factor > 0) {