Merge #10843: Add attribute [[noreturn]] (C++11) to functions that will not return

b82c55a Add attribute [[noreturn]] (C++11) to functions that will not return (practicalswift)

Pull request description:

  Add attribute `[[noreturn]]` (C++11) to functions that will not return.

  Rationale:
  * Reduce the number of false positives/false negatives from static analyzers with regards to things such as unused or unreachable code
  * Potentially enable additional compiler optimizations

Tree-SHA512: 899683fe8b2fcf19bd334352271d368b46b805be9d426aac1808335fd95732d6d7078d3296951b9879196f3f6e3ec0fdb7695d0afdc3fbe4dd78a2ca70e91ff7

Author: laanwj

src/random.cpp

@@ -46,10 +46,10 @@
 #include <openssl/err.h>
 #include <openssl/rand.h>
 
-static void RandFailure()
+[[noreturn]] static void RandFailure()
 {
     LogPrintf("Failed to read randomness, aborting\n");
-    abort();
+    std::abort();
 }
 
 static inline int64_t GetPerformanceCounter()

src/test/test_bitcoin_main.cpp

@@ -10,14 +10,14 @@
 
 std::unique_ptr<CConnman> g_connman;
 
-void Shutdown(void* parg)
+[[noreturn]] void Shutdown(void* parg)
 {
-  exit(EXIT_SUCCESS);
+  std::exit(EXIT_SUCCESS);
 }
 
-void StartShutdown()
+[[noreturn]] void StartShutdown()
 {
-  exit(EXIT_SUCCESS);
+  std::exit(EXIT_SUCCESS);
 }
 
 bool ShutdownRequested()