rev 12435 : 8170936: Logging: LogFileOutput.invalid_file_test crashes when executed twice.
Reviewed-by: duke

   1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include "logging/log.hpp"
  25 #include "logging/logConfiguration.hpp"
  26 #include "logging/logStream.hpp"
  27 #include "memory/resourceArea.hpp"
  28 #include "runtime/os.hpp"
  29 #include "unittest.hpp"
  30 
  31 #define LOG_TEST_STRING_LITERAL "a (hopefully) unique log message for testing"
  32 
  33 static inline bool string_contains_substring(const char* haystack, const char* needle) {
  34   return strstr(haystack, needle) != NULL;
  35 }
  36 
  37 static inline bool file_exists(const char* filename) {
  38   struct stat st;
  39   return os::stat(filename, &st) == 0;
  40 }
  41 
  42 static inline void delete_file(const char* filename) {
  43   if (!file_exists(filename)) {
  44     return;
  45   }
  46   int ret = remove(filename);
  47   EXPECT_TRUE(ret == 0 || errno == ENOENT) << "failed to remove file '" << filename << "': "
  48       << os::strerror(errno) << " (" << errno << ")";
  49 }
  50 
  51 static inline void create_directory(const char* name) {
  52   assert(!file_exists(name), "can't create directory: %s already exists", name);
  53   bool failed;
  54 #ifdef _WINDOWS
  55   failed = !CreateDirectory(name, NULL);
  56 #else
  57   failed = mkdir(name, 0777);
  58 #endif
  59   assert(!failed, "failed to create directory %s", name);
  60 }
  61 














  62 static inline void init_log_file(const char* filename, const char* options = "") {
  63   LogStreamHandle(Error, logging) stream;
  64   bool success = LogConfiguration::parse_log_arguments(filename, "logging=trace", "", options, &stream);
  65   guarantee(success, "Failed to initialize log file '%s' with options '%s'", filename, options);
  66   log_debug(logging)("%s", LOG_TEST_STRING_LITERAL);
  67   success = LogConfiguration::parse_log_arguments(filename, "all=off", "", "", &stream);
  68   guarantee(success, "Failed to disable logging to file '%s'", filename);
  69 }
  70 
  71 // Read a complete line from fp and return it as a resource allocated string.
  72 // Returns NULL on EOF.
  73 static inline char* read_line(FILE* fp) {
  74   assert(fp != NULL, "invalid fp");
  75   int buflen = 512;
  76   char* buf = NEW_RESOURCE_ARRAY(char, buflen);
  77   long pos = ftell(fp);
  78 
  79   char* ret = fgets(buf, buflen, fp);
  80   while (ret != NULL && buf[strlen(buf) - 1] != '\n' && !feof(fp)) {
  81     // retry with a larger buffer
  82     buf = REALLOC_RESOURCE_ARRAY(char, buf, buflen, buflen * 2);
  83     buflen *= 2;
  84     // rewind to beginning of line
  85     fseek(fp, pos, SEEK_SET);
  86     // retry read with new buffer
  87     ret = fgets(buf, buflen, fp);
  88   }
  89   return ret;
  90 }
  91 
  92 static bool file_contains_substrings_in_order(const char* filename, const char* substrs[]) {
  93   FILE* fp = fopen(filename, "r");
  94   assert(fp != NULL, "error opening file %s: %s", filename, strerror(errno));
  95 
  96   size_t idx = 0;
  97   while (substrs[idx] != NULL) {
  98     ResourceMark rm;
  99     char* line = read_line(fp);
 100     if (line == NULL) {
 101       break;
 102     }
 103     for (char* match = strstr(line, substrs[idx]); match != NULL;) {
 104       size_t match_len = strlen(substrs[idx]);
 105       idx++;
 106       if (substrs[idx] == NULL) {
 107         break;
 108       }
 109       match = strstr(match + match_len, substrs[idx]);
 110     }
 111   }
 112 
 113   fclose(fp);
 114   return substrs[idx] == NULL;
 115 }
 116 
 117 static inline bool file_contains_substring(const char* filename, const char* substr) {
 118   const char* strs[] = {substr, NULL};
 119   return file_contains_substrings_in_order(filename, strs);
 120 }
--- EOF ---