Use mallocng on Linux

.gitmodules

@@ -91,3 +91,6 @@
 [submodule "Telegram/lib_webview"]
 	path = Telegram/lib_webview
 	url = https://github.com/desktop-app/lib_webview.git
+[submodule "Telegram/ThirdParty/mallocng"]
+	path = Telegram/ThirdParty/mallocng
+	url = https://github.com/desktop-app/mallocng.git

Telegram/CMakeLists.txt

@@ -89,6 +89,7 @@ elseif (LINUX)
     PRIVATE
         desktop-app::external_glibmm
         desktop-app::external_glib
+        desktop-app::external_mallocng
     )
 
     if (NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)

Telegram/SourceFiles/platform/linux/specific_linux.cpp

@@ -59,6 +59,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include <unistd.h>
 #include <dirent.h>
 #include <pwd.h>
+#include <malloc.h>
 
 #include <iostream>
 
@@ -745,6 +746,16 @@ int psFixPrevious() {
 namespace Platform {
 
 void start() {
+	// avoid stripping custom allocator
+	malloc(0);
+	calloc(0, 0);
+	realloc(nullptr, 0);
+	free(nullptr);
+	aligned_alloc(0, 0);
+	malloc_usable_size(nullptr);
+	memalign(0, 0);
+	posix_memalign(nullptr, 0, 0);
+
 	LOG(("Launcher filename: %1").arg(QGuiApplication::desktopFileName()));
 
 	qputenv("PULSE_PROP_application.name", AppName.utf8());