compiler-rt/test/hwasan/TestCases/print-memory-usage-android.c

   1 // Tests __hwasan_print_memory_usage through /proc/$PID/maps.
   2 // RUN: %clang_hwasan %s -o %t && %env_hwasan_opts=export_memory_stats=1 %run %t 2>&1 | FileCheck %s
   3 // REQUIRES: android
   4
   5 #include <sys/types.h>
   6 #include <unistd.h>
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9
  10 // The function needs to be unsanitized in order for &cmd to be untagged. This
  11 // address is passed to system() and then to execve() syscall. The tests need to
  12 // run on unpatched linux kernel, which at this time does not accept tagged
  13 // pointers in system call arguments (but there is hope: see
  14 // https://lore.kernel.org/patchwork/cover/979328).
  15 __attribute__((no_sanitize("hwaddress")))
  16 int main() {
  17   char cmd[1024];
  18   snprintf(cmd, sizeof(cmd), "cat /proc/%d/maps", getpid());
  19   system(cmd);
  20   // CHECK: HWASAN pid: [[PID:[0-9]*]] rss: {{.*}} threads: 1 stacks: [[STACKS:[0-9]*]] thr_aux: {{.*}} stack_depot: {{.*}} uniq_stacks: [[UNIQ_STACKS:[0-9]*]] heap: [[HEAP:[0-9]*]]
  21 }