src/libcompiler_builtins/compiler-rt/test/scudo/rss.c

   1 // RUN: %clang_scudo %s -o %t
   2 // RUN:                                                                                                  %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nolimit
   3 // RUN: %env_scudo_opts="soft_rss_limit_mb=256"                                                          %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nolimit
   4 // RUN: %env_scudo_opts="hard_rss_limit_mb=256"                                                          %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nolimit
   5 // RUN: %env_scudo_opts="soft_rss_limit_mb=64:allocator_may_return_null=0"                           not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit
   6 // RUN: %env_scudo_opts="soft_rss_limit_mb=64:allocator_may_return_null=1"                               %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit-returnnull
   7 // RUN: %env_scudo_opts="soft_rss_limit_mb=64:allocator_may_return_null=0:can_use_proc_maps_statm=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit
   8 // RUN: %env_scudo_opts="soft_rss_limit_mb=64:allocator_may_return_null=1:can_use_proc_maps_statm=0"     %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit-returnnull
   9 // RUN: %env_scudo_opts="hard_rss_limit_mb=64:allocator_may_return_null=0"                           not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
  10 // RUN: %env_scudo_opts="hard_rss_limit_mb=64:allocator_may_return_null=1"                           not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
  11 // RUN: %env_scudo_opts="hard_rss_limit_mb=64:allocator_may_return_null=0:can_use_proc_maps_statm=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
  12 // RUN: %env_scudo_opts="hard_rss_limit_mb=64:allocator_may_return_null=1:can_use_proc_maps_statm=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
  13
  14 // Tests that the soft and hard RSS limits work as intended. Without limit or
  15 // with a high limit, the test should pass without any malloc returning NULL or
  16 // the program dying.
  17 // If a limit is specified, it should return some NULL or die depending on
  18 // allocator_may_return_null. This should also work without statm.
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 static const size_t kNumAllocs = 128;
  26 static const size_t kAllocSize = 1 << 20;  // 1MB.
  27
  28 static void *allocs[kNumAllocs];
  29
  30 int main(int argc, char *argv[]) {
  31   int returned_null = 0;
  32   for (int i = 0; i < kNumAllocs; i++) {
  33     if ((i & 0xf) == 0)
  34       usleep(50000);
  35     allocs[i] = malloc(kAllocSize);
  36     if (allocs[i])
  37       memset(allocs[i], 0xff, kAllocSize);  // Dirty the pages.
  38     else
  39       returned_null++;
  40   }
  41   for (int i = 0; i < kNumAllocs; i++)
  42     free(allocs[i]);
  43   if (returned_null == 0)
  44     printf("All malloc calls succeeded\n");
  45   else
  46     printf("%d malloc calls returned NULL\n", returned_null);
  47   return 0;
  48 }
  49
  50 // CHECK-nolimit: All malloc calls succeeded
  51 // CHECK-softlimit: soft RSS limit exhausted
  52 // CHECK-softlimit-NOT: malloc calls
  53 // CHECK-softlimit-returnnull: soft RSS limit exhausted
  54 // CHECK-softlimit-returnnull: malloc calls returned NULL
  55 // CHECK-hardlimit: hard RSS limit exhausted
  56 // CHECK-hardlimit-NOT: malloc calls