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| 1 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include <string> |
| 6 |
| 7 #include "base/file_util.h" |
| 8 #include "base/logging.h" |
| 9 #include "base/string_util.h" |
| 10 #include "crash/user_collector.h" |
| 11 #include "metrics_library.h" |
| 12 |
| 13 // This procfs file is used to cause kernel core file writing to |
| 14 // instead pipe the core file into a user space process. See |
| 15 // core(5) man page. |
| 16 static const char kCorePatternFile[] = "/proc/sys/kernel/core_pattern"; |
| 17 |
| 18 UserCollector::UserCollector() |
| 19 : core_pattern_file_(kCorePatternFile), |
| 20 count_crash_function_(NULL), |
| 21 initialized_(false), |
| 22 is_feedback_allowed_function_(NULL), |
| 23 logger_(NULL) { |
| 24 } |
| 25 |
| 26 void UserCollector::Initialize( |
| 27 UserCollector::CountCrashFunction count_crash_function, |
| 28 const std::string &our_path, |
| 29 UserCollector::IsFeedbackAllowedFunction is_feedback_allowed_function, |
| 30 SystemLogging *logger) { |
| 31 CHECK(count_crash_function != NULL); |
| 32 CHECK(is_feedback_allowed_function != NULL); |
| 33 CHECK(logger != NULL); |
| 34 |
| 35 count_crash_function_ = count_crash_function; |
| 36 our_path_ = our_path; |
| 37 is_feedback_allowed_function_ = is_feedback_allowed_function; |
| 38 logger_ = logger; |
| 39 initialized_ = true; |
| 40 } |
| 41 |
| 42 UserCollector::~UserCollector() { |
| 43 } |
| 44 |
| 45 std::string UserCollector::GetPattern(bool enabled) const { |
| 46 if (enabled) { |
| 47 return StringPrintf("|%s --signal=%%s --pid=%%p --exec=%%e", |
| 48 our_path_.c_str()); |
| 49 } else { |
| 50 return "core"; |
| 51 } |
| 52 } |
| 53 |
| 54 bool UserCollector::SetUpInternal(bool enabled) { |
| 55 CHECK(initialized_); |
| 56 logger_->LogInfo("%s crash handling", enabled ? "Enabling" : "Disabling"); |
| 57 std::string pattern = GetPattern(enabled); |
| 58 if (file_util::WriteFile(FilePath(core_pattern_file_), |
| 59 pattern.c_str(), |
| 60 pattern.length()) != pattern.length()) { |
| 61 logger_->LogError("Unable to write %s", core_pattern_file_.c_str()); |
| 62 return false; |
| 63 } |
| 64 return true; |
| 65 } |
| 66 |
| 67 void UserCollector::HandleCrash(int signal, int pid, const std::string &exec) { |
| 68 CHECK(initialized_); |
| 69 logger_->LogWarning("Received crash notification for %s[%d] sig %d", |
| 70 exec.c_str(), pid, signal); |
| 71 |
| 72 if (is_feedback_allowed_function_()) { |
| 73 count_crash_function_(); |
| 74 } |
| 75 } |
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