Fix deprecated usage of `mallinfo`

[TaWeiTu]

Summary

glibc deprecates mallinfo in the latest version of 2.33. This patch replaces the usage of mallinfo with the new mallinfo2 when it's available.

[lattner]

cool thx

llvm/cmake/config-ix.cmake

 if( HAVE_SIGNAL_H AND NOT LLVM_USE_SANITIZER MATCHES ".*Address.*" AND NOT APPLE )
   check_symbol_exists(sigaltstack signal.h HAVE_SIGALTSTACK)
 endif()
 set(CMAKE_REQUIRED_DEFINITIONS "-D_LARGEFILE64_SOURCE")
 check_symbol_exists(lseek64 "sys/types.h;unistd.h" HAVE_LSEEK64)
 set(CMAKE_REQUIRED_DEFINITIONS "")
 check_symbol_exists(mallctl malloc_np.h HAVE_MALLCTL)
 check_symbol_exists(mallinfo malloc.h HAVE_MALLINFO)
+check_symbol_exists(mallinfo2 malloc.h HAVE_MALLINFO2)
 check_symbol_exists(malloc_zone_statistics malloc/malloc.h
                     HAVE_MALLOC_ZONE_STATISTICS)
 check_symbol_exists(getrlimit "sys/types.h;sys/time.h;sys/resource.h" HAVE_GETRLIMIT)
 check_symbol_exists(posix_spawn spawn.h HAVE_POSIX_SPAWN)
 check_symbol_exists(pread unistd.h HAVE_PREAD)
 check_symbol_exists(sbrk unistd.h HAVE_SBRK)
 check_symbol_exists(strerror string.h HAVE_STRERROR)
 check_symbol_exists(strerror_r string.h HAVE_STRERROR_R)

llvm/include/llvm/Config/config.h.cmake

 #cmakedefine HAVE_MACH_MACH_H ${HAVE_MACH_MACH_H}
 
 /* Define to 1 if you have the `mallctl' function. */
 #cmakedefine HAVE_MALLCTL ${HAVE_MALLCTL}
 
 /* Define to 1 if you have the `mallinfo' function. */
 #cmakedefine HAVE_MALLINFO ${HAVE_MALLINFO}
 
+/* Define to 1 if you have the `mallinfo2' function. */
+#cmakedefine HAVE_MALLINFO2 ${HAVE_MALLINFO2}
+
 /* Define to 1 if you have the <malloc/malloc.h> header file. */
 #cmakedefine HAVE_MALLOC_MALLOC_H ${HAVE_MALLOC_MALLOC_H}
 
 /* Define to 1 if you have the `malloc_zone_statistics' function. */
 #cmakedefine HAVE_MALLOC_ZONE_STATISTICS ${HAVE_MALLOC_ZONE_STATISTICS}
 
 /* Define to 1 if you have the `posix_fallocate' function. */
 #cmakedefine HAVE_POSIX_FALLOCATE ${HAVE_POSIX_FALLOCATE}

llvm/lib/Support/Unix/Process.inc

 #include <sys/resource.h>
 #endif
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
 #if HAVE_SIGNAL_H
 #include <signal.h>
 #endif
-#if defined(HAVE_MALLINFO)
+#if defined(HAVE_MALLINFO) || defined(HAVE_MALLINFO2)
 #include <malloc.h>
 #endif
 #if defined(HAVE_MALLCTL)
 #include <malloc_np.h>
 #endif
 #ifdef HAVE_MALLOC_MALLOC_H
 #include <malloc/malloc.h>
 #endif

 #endif
   if (page_size == -1)
     return errorCodeToError(std::error_code(errno, std::generic_category()));
 
   return static_cast<unsigned>(page_size);
 }
 
 size_t Process::GetMallocUsage() {
-#if defined(HAVE_MALLINFO)
+#if defined(HAVE_MALLINFO2)
+  struct mallinfo2 mi;
+  mi = ::mallinfo2();
+  return mi.uordblks;
+#elif defined(HAVE_MALLINFO)
   struct mallinfo mi;
   mi = ::mallinfo();
   return mi.uordblks;
 #elif defined(HAVE_MALLOC_ZONE_STATISTICS) && defined(HAVE_MALLOC_MALLOC_H)
   malloc_statistics_t Stats;
   malloc_zone_statistics(malloc_default_zone(), &Stats);
   return Stats.size_in_use;   // darwin
 #elif defined(HAVE_MALLCTL)