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src/share/vm/logging/log.cpp
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rev 10386 : imported patch 8146879.03
@@ -131,9 +131,112 @@
LogConfiguration::configure_stdout(LogLevel::Off, false, LOG_TAGS(gc));
LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(logging));
assert_str_eq("all=off", stdoutput->config_string());
// Restore saved configuration
+ if (saved_config[strlen(saved_config) - 1] == ',') {
+ saved_config[strlen(saved_config) - 1] = '\0'; // strip trailing comma
+ }
LogConfiguration::parse_log_arguments("stdout", saved_config, NULL, NULL, log.error_stream());
os::free(saved_config);
}
+
+static size_t number_of_lines_with_substring_in_file(const char* filename,
+ const char* substr) {
+ size_t ret = 0;
+ FILE* fp = fopen(filename, "r");
+ assert(fp, "error opening file %s: %s", filename, strerror(errno));
+ char buf[512];
+ while (fgets(buf, sizeof(buf), fp) != NULL) {
+ if (strstr(buf, substr) != NULL) {
+ ret++;
+ }
+ }
+ fclose(fp);
+ return ret;
+}
+
+static bool file_exists(const char* filename) {
+ struct stat st;
+ return os::stat(filename, &st) == 0;
+}
+
+static void delete_file(const char* filename) {
+ if (!file_exists(filename)) {
+ return;
+ }
+ int ret = remove(filename);
+ assert(ret == 0, "failed to remove file '%s': %s", filename, strerror(errno));
+}
+
+static const char* ExpectedLine = "a (hopefully) unique log line for testing";
+
+static void init_file(const char* filename, const char* options = "") {
+ LogConfiguration::parse_log_arguments(filename, "logging=trace", "", options,
+ LogHandle(logging)::error_stream());
+ log_debug(logging)("%s", ExpectedLine);
+ LogConfiguration::parse_log_arguments(filename, "all=off", "", "",
+ LogHandle(logging)::error_stream());
+}
+
+void Test_log_file_startup_rotation() {
+ ResourceMark rm;
+ const size_t rotations = 5;
+ const char* filename = "start-rotate-test";
+ char* rotated_file[rotations];
+ for (size_t i = 0; i < rotations; i++) {
+ size_t len = strlen(filename) + 3;
+ rotated_file[i] = NEW_RESOURCE_ARRAY(char, len);
+ jio_snprintf(rotated_file[i], len, "%s." SIZE_FORMAT, filename, i);
+ delete_file(rotated_file[i]);
+ };
+
+ delete_file(filename);
+ init_file(filename);
+ assert(file_exists(filename),
+ "configured logging to file '%s' but file was not found", filename);
+
+ // Initialize the same file a bunch more times to trigger rotations
+ for (size_t i = 0; i < rotations; i++) {
+ init_file(filename);
+ assert(file_exists(rotated_file[i]), "existing file was not rotated");
+ }
+
+ // Remove a file and expect its slot to be re-used
+ delete_file(rotated_file[1]);
+ init_file(filename);
+ assert(file_exists(rotated_file[1]), "log file not properly rotated");
+
+ // Clean up after test
+ delete_file(filename);
+ for (size_t i = 0; i < rotations; i++) {
+ delete_file(rotated_file[i]);
+ }
+}
+
+void Test_log_file_startup_truncation() {
+ ResourceMark rm;
+ const char* filename = "start-truncate-test";
+ const char* archived_filename = "start-truncate-test.0";
+
+ delete_file(filename);
+ delete_file(archived_filename);
+
+ // Use the same log file twice and expect it to be overwritten/truncated
+ init_file(filename, "filecount=0");
+ assert(file_exists(filename), "couldn't find log file: %s", filename);
+
+ init_file(filename, "filecount=0");
+ assert(file_exists(filename), "couldn't find log file: %s", filename);
+ assert(!file_exists(archived_filename),
+ "existing log file %s was not properly truncated when filecount was 0",
+ filename);
+
+ // Verify that the file was really truncated and not just appended
+ assert(number_of_lines_with_substring_in_file(filename, ExpectedLine) == 1,
+ "log file %s appended rather than truncated", filename);
+
+ delete_file(filename);
+ delete_file(archived_filename);
+}
+
#endif // PRODUCT
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