.

bigfile/tests/test_virtmem.c

@@ -223,34 +223,40 @@ int M(VMA *vma, pgoff_t idx) {  return bitmap_test_bit(vma->page_ismappedv, idx)
     ok1(!pagemap_get(&(fileh)->pagemap, (pgoffset)));   \
 } while (0)
 
+
+/* _pagev_str returns string representation for vector of pages.
+ * the memory has to be freed by user. */
+char *_pagev_str(Page **pagev, int pagec) {
+        char *vstr;
+        size_t _;
+        FILE *w = open_memstream(&vstr, &_);
+
+        fprintf(w, "[");
+        for (int i=0; i<pagec; i++)
+            fprintf(w, "%sp%ld", (i > 0 ? ", " : ""), pagev[i]->f_pgoffset);
+        fprintf(w, "]");
+        fclose(w);
+        return vstr;
+}
+
 /* _assert_pagev asserts that two page vectors are the same */
 void _assert_pagev(const char *subj, Page **vok, int nok, Page **pagev, int n,
                    const char *func, const char *file, int line)
 {
-    int i;
+    char *vstr = _pagev_str(pagev, n);
 
     if (!(n == nok && !memcmp(pagev, vok, n*sizeof(*pagev)))) {
+        char *vstr_ok = _pagev_str(vok, nok);
         fprintf(stderr, "%s: failed\n", subj);
-        fprintf(stderr, "have: [");
-        for (i=0; i<n; i++)
-            fprintf(stderr, "%sp%ld", (i > 0 ? ", " : ""), pagev[i]->f_pgoffset);
-        fprintf(stderr, "]\n");
-        fprintf(stderr, "want: [");
-        for (i=0; i<nok; i++)
-            fprintf(stderr, "%sp%ld", (i > 0 ? ", " : ""), vok[i]->f_pgoffset);
-        fprintf(stderr, "]\n");
+        fprintf(stderr, "have: %s\n", vstr);
+        fprintf(stderr, "want: %s\n", vstr_ok);
         _gen_result(0, func, file, line, "%s failed", subj);
-    }
-    else {
-        char *vstr;
-        asprintf(&vstr, "[");
-        for (i=0; i<n; i++)
-            asprintf(&vstr, "%sp%ld", (i > 0 ? ", " : ""), pagev[i]->f_pgoffset);
-        asprintf(&vstr, "]");
-
+        free(vstr_ok);
+    } else {
         pass("%s %s", subj, vstr);
-        free(vstr);
     }
+
+    free(vstr);
 }
 
 /* _check_mru checks that ram has MRU pages as specified by pagev. */