Bug 1364068 - Properly cleanup libcurl in the pingsender. r=gsvelto,jseward

This additionally changes exit() calls with |return VALUE| so
that we are sure to call the destructors and valgrind doesn't complain.

Moreover, this disables the 'new-profile' ping when Firefox is ran
on test profiles.

MozReview-Commit-ID: BlGE9w6yGCL

--HG--
extra : rebase_source : 4149973f832f968a75ec51b245104cb02fd35d4e

testing/profiles/prefs_general.js

@@ -246,6 +246,9 @@ user_pref('browser.contentHandlers.types.5.uri', 'http://test1.example.org/rss?u
 
 // We want to collect telemetry, but we don't want to send in the results.
 user_pref('toolkit.telemetry.server', 'https://%(server)s/telemetry-dummy/');
+// Don't new-profile' ping on new profiles during tests, otherwise the testing framework
+// might wait on the pingsender to finish and slow down tests.
+user_pref("toolkit.telemetry.newProfilePing.enabled", false);
 
 // A couple of preferences with default values to test that telemetry preference
 // watching is working.

toolkit/components/telemetry/pingsender/pingsender.cpp

@@ -152,14 +152,14 @@ int main(int argc, char* argv[])
                    "Send the payload stored in PATH to the specified URL using "
                    "an HTTP POST message\n"
                    "then delete the file after a successful send.\n");
-    exit(EXIT_FAILURE);
+    return EXIT_FAILURE;
   }
 
   string ping(ReadPing(pingPath));
 
   if (ping.empty()) {
     PINGSENDER_LOG("ERROR: Ping payload is empty\n");
-    exit(EXIT_FAILURE);
+    return EXIT_FAILURE;
   }
 
   // Compress the ping using gzip.
@@ -170,18 +170,18 @@ int main(int argc, char* argv[])
   // it compressed.
   if (gzipPing.empty()) {
     PINGSENDER_LOG("ERROR: Ping compression failed\n");
-    exit(EXIT_FAILURE);
+    return EXIT_FAILURE;
   }
 
   if (!Post(url, gzipPing)) {
-    exit(EXIT_FAILURE);
+    return EXIT_FAILURE;
   }
 
   // If the ping was successfully sent, delete the file.
   if (!pingPath.empty() && std::remove(pingPath.c_str())) {
     // We failed to remove the pending ping file.
-    exit(EXIT_FAILURE);
+    return EXIT_FAILURE;
   }
 
-  exit(EXIT_SUCCESS);
+  return EXIT_SUCCESS;
 }

toolkit/components/telemetry/pingsender/pingsender_unix_common.cpp

@@ -41,6 +41,7 @@ public:
   void (*slist_free_all)(curl_slist*);
   const char* (*easy_strerror)(CURLcode);
   void (*easy_cleanup)(CURL*);
+  void (*global_cleanup)(void);
 
 private:
   void* mLib;
@@ -56,6 +57,7 @@ CurlWrapper::CurlWrapper()
   , slist_free_all(nullptr)
   , easy_strerror(nullptr)
   , easy_cleanup(nullptr)
+  , global_cleanup(nullptr)
   , mLib(nullptr)
   , mCurl(nullptr)
 {}
@@ -67,6 +69,10 @@ CurlWrapper::~CurlWrapper()
       easy_cleanup(mCurl);
     }
 
+    if (global_cleanup) {
+      global_cleanup();
+    }
+
     dlclose(mLib);
   }
 }
@@ -116,6 +122,7 @@ CurlWrapper::Init()
   *(void**) (&slist_free_all) = dlsym(mLib, "curl_slist_free_all");
   *(void**) (&easy_strerror) = dlsym(mLib, "curl_easy_strerror");
   *(void**) (&easy_cleanup) = dlsym(mLib, "curl_easy_cleanup");
+  *(void**) (&global_cleanup) = dlsym(mLib, "curl_global_cleanup");
 
   if (!easy_init ||
       !easy_setopt ||
@@ -124,7 +131,8 @@ CurlWrapper::Init()
       !slist_append ||
       !slist_free_all ||
       !easy_strerror ||
-      !easy_cleanup) {
+      !easy_cleanup ||
+      !global_cleanup) {
     PINGSENDER_LOG("ERROR: libcurl is missing one of the required symbols\n");
     return false;
   }