Bug 1302163 - Change code to use SprintfLiteral instead of snprintf. r=ehsan

b2g/app/nsBrowserApp.cpp

@@ -41,6 +41,7 @@
 # include <binder/ProcessState.h>
 #endif
 
+#include "mozilla/Sprintf.h"
 #include "mozilla/Telemetry.h"
 #include "mozilla/WindowsDllBlocklist.h"
 
@@ -123,7 +124,7 @@ static int do_main(int argc, char* argv[])
     }
 
     char appEnv[MAXPATHLEN];
-    snprintf(appEnv, MAXPATHLEN, "XUL_APP_FILE=%s", argv[2]);
+    SprintfLiteral(appEnv, "XUL_APP_FILE=%s", argv[2]);
     if (putenv(strdup(appEnv))) {
       Output("Couldn't set %s.\n", appEnv);
       return 255;

browser/app/nsBrowserApp.cpp

@@ -39,6 +39,7 @@
 
 #include "nsXPCOMPrivate.h" // for MAXPATHLEN and XPCOM_DLL
 
+#include "mozilla/Sprintf.h"
 #include "mozilla/Telemetry.h"
 #include "mozilla/WindowsDllBlocklist.h"
 
@@ -192,7 +193,7 @@ static int do_main(int argc, char* argv[], char* envp[], nsIFile *xreDirectory)
     }
 
     char appEnv[MAXPATHLEN];
-    snprintf(appEnv, MAXPATHLEN, "XUL_APP_FILE=%s", argv[2]);
+    SprintfLiteral(appEnv, "XUL_APP_FILE=%s", argv[2]);
     if (putenv(strdup(appEnv))) {
       Output("Couldn't set %s.\n", appEnv);
       return 255;

dom/plugins/ipc/PluginModuleChild.cpp

@@ -32,6 +32,7 @@
 #include "mozilla/plugins/BrowserStreamChild.h"
 #include "mozilla/plugins/PluginStreamChild.h"
 #include "mozilla/dom/CrashReporterChild.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/Unused.h"
 
 #include "nsNPAPIPlugin.h"
@@ -265,7 +266,7 @@ PluginModuleChild::InitForChrome(const std::string& aPluginFilename,
 #if defined(XP_MACOSX)
     const char* namePrefix = "Plugin Content";
     char nameBuffer[80];
-    snprintf(nameBuffer, sizeof(nameBuffer), "%s (%s)", namePrefix, info.fName);
+    SprintfLiteral(nameBuffer, "%s (%s)", namePrefix, info.fName);
     mozilla::plugins::PluginUtilsOSX::SetProcessName(nameBuffer);
 #endif
     pluginFile.FreePluginInfo(info);

dom/plugins/ipc/PluginUtilsOSX.mm

@@ -15,6 +15,8 @@
 
 #include "nsDebug.h"
 
+#include "mozilla/Sprintf.h"
+
 @interface CALayer (ContentsScale)
 - (double)contentsScale;
 - (void)setContentsScale:(double)scale;
@@ -222,12 +224,11 @@ bool mozilla::plugins::PluginUtilsOSX::SetProcessName(const char* aProcessName)
     return false;
   }
 
-  NSString *currentName = [[[NSBundle mainBundle] localizedInfoDictionary] 
+  NSString *currentName = [[[NSBundle mainBundle] localizedInfoDictionary]
                               objectForKey:(NSString *)kCFBundleNameKey];
 
   char formattedName[1024];
-  snprintf(formattedName, sizeof(formattedName), 
+  SprintfLiteral(formattedName, "%s %s", [currentName UTF8String], aProcessName);
-      "%s %s", [currentName UTF8String], aProcessName);
 
   aProcessName = formattedName;
 

gfx/layers/composite/PaintCounter.cpp

@@ -48,11 +48,10 @@ PaintCounter::~PaintCounter()
 
 void
 PaintCounter::Draw(Compositor* aCompositor, TimeDuration aPaintTime, TimeDuration aCompositeTime) {
-  const int buffer_size = 48;
+  char buffer[48];
-  char buffer[buffer_size];
+  SprintfLiteral(buffer, "P: %.2f  C: %.2f",
-  snprintf(buffer, buffer_size, "P: %.2f  C: %.2f",
+                 aPaintTime.ToMilliseconds(),
-           aPaintTime.ToMilliseconds(),
+                 aCompositeTime.ToMilliseconds());
-           aCompositeTime.ToMilliseconds());
 
   SkPaint paint;
   paint.setTextSize(32);

js/xpconnect/src/XPCDebug.cpp

@@ -9,6 +9,8 @@
 #include "nsThreadUtils.h"
 #include "nsContentUtils.h"
 
+#include "mozilla/Sprintf.h"
+
 #ifdef XP_WIN
 #include <windows.h>
 #endif
@@ -20,10 +22,10 @@ static void DebugDump(const char* fmt, ...)
   va_start(ap, fmt);
 #ifdef XPWIN
   _vsnprintf(buffer, sizeof(buffer), fmt, ap);
-#else
-  vsnprintf(buffer, sizeof(buffer), fmt, ap);
-#endif
   buffer[sizeof(buffer)-1] = '\0';
+#else
+  VsprintfLiteral(buffer, fmt, ap);
+#endif
   va_end(ap);
 #ifdef XP_WIN
   if (IsDebuggerPresent()) {

js/xpconnect/src/XPCJSContext.cpp

@@ -47,6 +47,7 @@
 #include "mozilla/Atomics.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/ProcessHangMonitor.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/UniquePtrExtensions.h"
 #include "mozilla/Unused.h"
 #include "AccessCheck.h"
@@ -3528,7 +3529,7 @@ XPCJSContext::DescribeCustomObjects(JSObject* obj, const js::Class* clasp,
         return false;
     }
 
-    snprintf(name, sizeof(name), "JS Object (%s - %s)", clasp->name, si->GetJSClass()->name);
+    SprintfLiteral(name, "JS Object (%s - %s)", clasp->name, si->GetJSClass()->name);
     return true;
 }
 

js/xpconnect/src/XPCWrappedJS.cpp

@@ -9,6 +9,7 @@
 #include "xpcprivate.h"
 #include "jsprf.h"
 #include "mozilla/DeferredFinalize.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "nsCCUncollectableMarker.h"
 #include "nsContentUtils.h"
@@ -103,9 +104,9 @@ NS_CYCLE_COLLECTION_CLASSNAME(nsXPCWrappedJS)::Traverse
     if (cb.WantDebugInfo()) {
         char name[72];
         if (tmp->GetClass())
-            snprintf(name, sizeof(name), "nsXPCWrappedJS (%s)", tmp->GetClass()->GetInterfaceName());
+            SprintfLiteral(name, "nsXPCWrappedJS (%s)", tmp->GetClass()->GetInterfaceName());
         else
-            snprintf(name, sizeof(name), "nsXPCWrappedJS");
+            SprintfLiteral(name, "nsXPCWrappedJS");
         cb.DescribeRefCountedNode(refcnt, name);
     } else {
         NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsXPCWrappedJS, refcnt)

js/xpconnect/src/XPCWrappedNative.cpp

@@ -23,6 +23,7 @@
 #include "mozilla/DeferredFinalize.h"
 #include "mozilla/Likely.h"
 #include "mozilla/Unused.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/dom/BindingUtils.h"
 #include <algorithm>
 
@@ -51,9 +52,9 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(XPCWrappedNative)
         char name[72];
         XPCNativeScriptableInfo* si = tmp->GetScriptableInfo();
         if (si)
-            snprintf(name, sizeof(name), "XPCWrappedNative (%s)", si->GetJSClass()->name);
+            SprintfLiteral(name, "XPCWrappedNative (%s)", si->GetJSClass()->name);
         else
-            snprintf(name, sizeof(name), "XPCWrappedNative");
+            SprintfLiteral(name, "XPCWrappedNative");
 
         cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
     } else {

media/mtransport/rlogringbuffer.cpp

@@ -16,6 +16,7 @@
 #include "mozilla/Assertions.h"
 #include "mozilla/Move.h" // Pinch hitting for <utility> and std::move
 #include "mozilla/Mutex.h"
+#include "mozilla/Sprintf.h"
 #include <vector>
 
 extern "C" {
@@ -33,7 +34,7 @@ static int ringbuffer_vlog(int facility,
   // I could be evil and printf right into a std::string, but unless this
   // shows up in profiling, it is not worth doing.
   char temp[4096];
-  vsnprintf(temp, sizeof(temp), format, ap);
+  VsprintfLiteral(temp, format, ap);
 
   mozilla::RLogRingBuffer::GetInstance()->Log(std::string(temp));
   return 0;

media/webrtc/signaling/src/common/browser_logging/CSFLog.cpp

@@ -15,6 +15,7 @@
 #include "nsThreadUtils.h"
 
 #include "mozilla/Logging.h"
+#include "mozilla/Sprintf.h"
 
 static PRLogModuleInfo *gLogModuleInfo = nullptr;
 
@@ -83,7 +84,7 @@ void CSFLogV(CSFLogLevel priority, const char* sourceFile, int sourceLine, const
     threadName = "";
   }
 
-  vsnprintf(message, MAX_MESSAGE_LENGTH, format, args);
+  VsprintfLiteral(message, format, args);
   MOZ_LOG(gLogModuleInfo, level, ("[%s|%s] %s:%d: %s",
                                   threadName, tag, sourceFile, sourceLine,
                                   message));

netwerk/sctp/datachannel/DataChannel.cpp

@@ -36,6 +36,7 @@
 #include "nsIObserverService.h"
 #include "nsIObserver.h"
 #include "mozilla/Services.h"
+#include "mozilla/Sprintf.h"
 #include "nsProxyRelease.h"
 #include "nsThread.h"
 #include "nsThreadUtils.h"
@@ -196,7 +197,7 @@ debug_printf(const char *format, ...)
 #ifdef _WIN32
     if (vsnprintf_s(buffer, sizeof(buffer), _TRUNCATE, format, ap) > 0) {
 #else
-    if (vsnprintf(buffer, sizeof(buffer), format, ap) > 0) {
+    if (VsprintfLiteral(buffer, format, ap) > 0) {
 #endif
       PR_LogPrint("%s", buffer);
     }

netwerk/system/linux/nsNotifyAddrListener_Linux.cpp

@@ -20,11 +20,12 @@
 #include "nsString.h"
 #include "mozilla/Logging.h"
 
-#include "mozilla/Services.h"
-#include "mozilla/Preferences.h"
-#include "mozilla/FileUtils.h"
-#include "mozilla/SHA1.h"
 #include "mozilla/Base64.h"
+#include "mozilla/FileUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+#include "mozilla/SHA1.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/Telemetry.h"
 
 #ifdef MOZ_WIDGET_GONK
@@ -139,11 +140,11 @@ void nsNotifyAddrListener::calculateNetworkId(void)
         if (gw) {
             /* create a string to search for in the arp table */
             char searchfor[16];
-            snprintf(searchfor, sizeof(searchfor), "%d.%d.%d.%d",
+            SprintfLiteral(searchfor, "%d.%d.%d.%d",
-                     gw & 0xff,
+                           gw & 0xff,
-                     (gw >> 8) & 0xff,
+                           (gw >> 8) & 0xff,
-                     (gw >> 16) & 0xff,
+                           (gw >> 16) & 0xff,
-                     gw >> 24);
+                           gw >> 24);
 
             FILE *farp = fopen(kProcArp, "r");
             if (farp) {

security/sandbox/linux/SandboxUtil.cpp

@@ -17,6 +17,7 @@
 #include <unistd.h>
 
 #include "mozilla/Assertions.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/Unused.h"
 #include "sandbox/linux/system_headers/linux_syscalls.h"
 
@@ -83,7 +84,7 @@ UnshareUserNamespace()
   // current thread.  However, CLONE_NEWUSER can be unshared only in a
   // single-threaded process, so those are equivalent if we reach this
   // point.
-  len = size_t(snprintf(buf, sizeof(buf), "%u %u 1\n", uid, uid));
+  len = size_t(SprintfLiteral(buf, "%u %u 1\n", uid, uid));
   MOZ_ASSERT(len < sizeof(buf));
   if (!WriteStringToFile("/proc/self/uid_map", buf, len)) {
     MOZ_CRASH("Failed to write /proc/self/uid_map");
@@ -91,7 +92,7 @@ UnshareUserNamespace()
 
   Unused << WriteStringToFile("/proc/self/setgroups", "deny", 4);
 
-  len = size_t(snprintf(buf, sizeof(buf), "%u %u 1\n", gid, gid));
+  len = size_t(SprintfLiteral(buf, "%u %u 1\n", gid, gid));
   MOZ_ASSERT(len < sizeof(buf));
   if (!WriteStringToFile("/proc/self/gid_map", buf, len)) {
     MOZ_CRASH("Failed to write /proc/self/gid_map");

security/sandbox/linux/broker/SandboxBroker.cpp

@@ -29,6 +29,7 @@
 #include "mozilla/DebugOnly.h"
 #include "mozilla/Move.h"
 #include "mozilla/NullPtr.h"
+#include "mozilla/Sprintf.h"
 #include "mozilla/ipc/FileDescriptor.h"
 
 namespace mozilla {
@@ -354,7 +355,7 @@ void
 SandboxBroker::ThreadMain(void)
 {
   char threadName[16];
-  snprintf(threadName, sizeof(threadName), "FS Broker %d", mChildPid);
+  SprintfLiteral(threadName, "FS Broker %d", mChildPid);
   PlatformThread::SetName(threadName);
 
   // Permissive mode can only be enabled through an environment variable,

toolkit/mozapps/update/updater/progressui_gtk.cpp

@@ -7,6 +7,7 @@
 #include <stdio.h>
 #include <gtk/gtk.h>
 #include <unistd.h>
+#include "mozilla/Sprintf.h"
 #include "progressui.h"
 #include "readstrings.h"
 #include "errors.h"
@@ -71,7 +72,7 @@ ShowProgressUI()
     return 0;
 
   char ini_path[PATH_MAX];
-  snprintf(ini_path, sizeof(ini_path), "%s.ini", sProgramPath);
+  SprintfLiteral(ini_path, "%s.ini", sProgramPath);
 
   StringTable strings;
   if (ReadStrings(ini_path, &strings) != OK)
@@ -83,7 +84,7 @@ ShowProgressUI()
 
   static GdkPixbuf *pixbuf;
   char icon_path[PATH_MAX];
-  snprintf(icon_path, sizeof(icon_path), "%s.png", sProgramPath);
+  SprintfLiteral(icon_path, "%s.png", sProgramPath);
 
   g_signal_connect(G_OBJECT(sWin), "delete_event",
                    G_CALLBACK(OnDeleteEvent), nullptr);

toolkit/mozapps/update/updater/progressui_osx.mm

@@ -7,6 +7,7 @@
 #import <Cocoa/Cocoa.h>
 #include <stdio.h>
 #include <unistd.h>
+#include "mozilla/Sprintf.h"
 #include "progressui.h"
 #include "readstrings.h"
 #include "errors.h"
@@ -110,7 +111,7 @@ ShowProgressUI(bool indeterminate)
     return 0;
 
   char path[PATH_MAX];
-  snprintf(path, sizeof(path), "%s/updater.ini", sUpdatePath);
+  SprintfLiteral(path, "%s/updater.ini", sUpdatePath);
   if (ReadStrings(path, &sLabels) != OK)
     return -1;
 

tools/profiler/core/platform.cpp

@@ -18,6 +18,7 @@
 #endif
 #include "mozilla/ThreadLocal.h"
 #include "mozilla/TimeStamp.h"
+#include "mozilla/Sprintf.h"
 #include "PseudoStack.h"
 #include "GeckoSampler.h"
 #ifndef SPS_STANDALONE
@@ -429,7 +430,7 @@ mozilla_sampler_log(const char *fmt, va_list args)
     char buf[2048];
     va_list argsCpy;
     VARARGS_ASSIGN(argsCpy, args);
-    int required = vsnprintf(buf, sizeof(buf), fmt, argsCpy);
+    int required = VsprintfLiteral(buf, fmt, argsCpy);
     va_end(argsCpy);
 
     if (required < 0) {

tools/profiler/lul/AutoObjectMapper.cpp

@@ -11,6 +11,7 @@
 #include <fcntl.h>
 
 #include "mozilla/Assertions.h"
+#include "mozilla/Sprintf.h"
 
 #include "PlatformMacros.h"
 #include "AutoObjectMapper.h"
@@ -43,8 +44,8 @@ failedToMessage(void(*aLog)(const char*),
                 const char* aHowFailed, std::string aFileName)
 {
   char buf[300];
-  snprintf(buf, sizeof(buf), "AutoObjectMapper::Map: Failed to %s \'%s\'",
+  SprintfLiteral(buf, "AutoObjectMapper::Map: Failed to %s \'%s\'",
-           aHowFailed, aFileName.c_str());
+                 aHowFailed, aFileName.c_str());
   buf[sizeof(buf)-1] = 0;
   aLog(buf);
 }

tools/profiler/lul/LulElf.cpp

@@ -59,6 +59,7 @@
 #include <vector>
 
 #include "mozilla/Assertions.h"
+#include "mozilla/Sprintf.h"
 
 #include "LulPlatformMacros.h"
 #include "LulCommonExt.h"
@@ -359,7 +360,7 @@ bool LoadSymbols(const string& obj_file,
   typedef typename ElfClass::Shdr Shdr;
 
   char buf[500];
-  snprintf(buf, sizeof(buf), "LoadSymbols: BEGIN   %s\n", obj_file.c_str());
+  SprintfLiteral(buf, "LoadSymbols: BEGIN   %s\n", obj_file.c_str());
   buf[sizeof(buf)-1] = 0;
   log(buf);
 
@@ -369,7 +370,7 @@ bool LoadSymbols(const string& obj_file,
       GetOffset<ElfClass, Phdr>(elf_header, elf_header->e_phoff),
       elf_header->e_phnum);
   uintptr_t text_bias = ((uintptr_t)rx_avma) - loading_addr;
-  snprintf(buf, sizeof(buf),
+  SprintfLiteral(buf,
            "LoadSymbols:   rx_avma=%llx, text_bias=%llx",
            (unsigned long long int)(uintptr_t)rx_avma,
            (unsigned long long int)text_bias);
@@ -434,7 +435,7 @@ bool LoadSymbols(const string& obj_file,
       log("LoadSymbols:   read CFI from .eh_frame");
   }
 
-  snprintf(buf, sizeof(buf), "LoadSymbols: END     %s\n", obj_file.c_str());
+  SprintfLiteral(buf, "LoadSymbols: END     %s\n", obj_file.c_str());
   buf[sizeof(buf)-1] = 0;
   log(buf);
 

tools/profiler/public/GeckoProfilerImpl.h

@@ -10,9 +10,10 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <stdarg.h>
-#include "mozilla/ThreadLocal.h"
 #include "mozilla/Assertions.h"
 #include "mozilla/GuardObjects.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/ThreadLocal.h"
 #include "mozilla/UniquePtr.h"
 #ifndef SPS_STANDALONE
 #include "nscore.h"
@@ -443,8 +444,8 @@ public:
 
       // We have to use seperate printf's because we're using
       // the vargs.
-      ::vsnprintf(buff, SAMPLER_MAX_STRING, aFormat, args);
+      VsprintfLiteral(buff, aFormat, args);
-      ::snprintf(mDest, SAMPLER_MAX_STRING, "%s %s", aInfo, buff);
+      SprintfLiteral(mDest, "%s %s", aInfo, buff);
 
       mHandle = mozilla_sampler_call_enter(mDest, aCategory, this, true, line);
       va_end(args);

widget/cocoa/nsSandboxViolationSink.mm

@@ -12,6 +12,7 @@
 #include <notify.h>
 #include "nsCocoaDebugUtils.h"
 #include "mozilla/Preferences.h"
+#include "mozilla/Sprintf.h"
 
 int nsSandboxViolationSink::mNotifyToken = 0;
 uint64_t nsSandboxViolationSink::mLastMsgReceived = 0;
@@ -59,7 +60,7 @@ nsSandboxViolationSink::ViolationHandler()
 
   // Only get reports that were generated very recently.
   char query_time[30] = {0};
-  snprintf(query_time, sizeof(query_time), "%li", time(NULL) - 2);
+  SprintfLiteral(query_time, "%li", time(NULL) - 2);
   asl_set_query(query, ASL_KEY_TIME, query_time,
                 ASL_QUERY_OP_NUMERIC | ASL_QUERY_OP_GREATER_EQUAL);
 
@@ -74,7 +75,7 @@ nsSandboxViolationSink::ViolationHandler()
     // be better to make the chrome process log all the other processes'
     // violations.
     char query_pid[20] = {0};
-    snprintf(query_pid, sizeof(query_pid), "%u", getpid());
+    SprintfLiteral(query_pid, "%u", getpid());
     asl_set_query(query, ASL_KEY_REF_PID, query_pid, ASL_QUERY_OP_EQUAL);
   }
 

xpcom/base/nsSystemInfo.cpp

@@ -12,6 +12,7 @@
 #include "prprf.h"
 #include "mozilla/SSE.h"
 #include "mozilla/arm.h"
+#include "mozilla/Sprintf.h"
 
 #ifdef XP_WIN
 #include <time.h>
@@ -703,9 +704,8 @@ nsSystemInfo::Init()
 #endif
 
   if (gtkver_len <= 0) {
-    gtkver_len = snprintf(gtkver, sizeof(gtkver), "GTK %u.%u.%u",
+    gtkver_len = SprintfLiteral(gtkver, "GTK %u.%u.%u", gtk_major_version,
-                          gtk_major_version, gtk_minor_version,
+                                gtk_minor_version, gtk_micro_version);
-                          gtk_micro_version);
   }
 
   nsAutoCString secondaryLibrary;

xpcom/glue/nsStringAPI.cpp

@@ -11,6 +11,8 @@
 #include "nsXPCOMStrings.h"
 #include "nsDebug.h"
 
+#include "mozilla/Sprintf.h"
+
 #include <stdio.h>
 
 // nsAString
@@ -521,9 +523,7 @@ nsAString::AppendInt(int aInt, int32_t aRadix)
   }
 
   char buf[20];
-  int len = snprintf(buf, sizeof(buf), fmt, aInt);
+  int len = SprintfLiteral(buf, fmt, aInt);
-  buf[sizeof(buf) - 1] = '\0';
-
   Append(NS_ConvertASCIItoUTF16(buf, len));
 }
 
@@ -1001,9 +1001,7 @@ nsACString::AppendInt(int aInt, int32_t aRadix)
   }
 
   char buf[20];
-  int len = snprintf(buf, sizeof(buf), fmt, aInt);
+  int len = SprintfLiteral(buf, fmt, aInt);
-  buf[sizeof(buf) - 1] = '\0';
-
   Append(buf, len);
 }
 

xpcom/glue/standalone/nsXPCOMGlue.cpp

@@ -15,6 +15,7 @@
 #include <stdio.h>
 
 #include "mozilla/FileUtils.h"
+#include "mozilla/Sprintf.h"
 
 using namespace mozilla;
 
@@ -346,7 +347,7 @@ XPCOMGlueLoadXULFunctions(const nsDynamicFunctionLoad* aSymbols)
   nsresult rv = NS_OK;
   while (aSymbols->functionName) {
     char buffer[512];
-    snprintf(buffer, sizeof(buffer), "%s", aSymbols->functionName);
+    SprintfLiteral(buffer, "%s", aSymbols->functionName);
 
     *aSymbols->function = (NSFuncPtr)GetSymbol(sTop->libHandle, buffer);
     if (!*aSymbols->function) {

xpcom/io/nsLocalFileUnix.cpp

@@ -10,6 +10,7 @@
 
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/Attributes.h"
+#include "mozilla/Sprintf.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -1296,7 +1297,7 @@ GetDeviceName(int aDeviceMajor, int aDeviceMinor, nsACString& aDeviceName)
   char mountinfoLine[kMountInfoLineLength];
   char deviceNum[kMountInfoLineLength];
 
-  snprintf(deviceNum, kMountInfoLineLength, "%d:%d", aDeviceMajor, aDeviceMinor);
+  SprintfLiteral(deviceNum, "%d:%d", aDeviceMajor, aDeviceMinor);
 
   FILE* f = fopen("/proc/self/mountinfo", "rt");
   if (!f) {