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| // RUN: %clang_scudo %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nolimit
// RUN: %env_scudo_opts="soft_rss_limit_mb=128" %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nolimit
// RUN: %env_scudo_opts="hard_rss_limit_mb=128" %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nolimit
// RUN: %env_scudo_opts="soft_rss_limit_mb=32:allocator_may_return_null=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit
// RUN: %env_scudo_opts="soft_rss_limit_mb=32:allocator_may_return_null=1" %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit-returnnull
// RUN: %env_scudo_opts="soft_rss_limit_mb=32:allocator_may_return_null=0:can_use_proc_maps_statm=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit
// RUN: %env_scudo_opts="soft_rss_limit_mb=32:allocator_may_return_null=1:can_use_proc_maps_statm=0" %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-softlimit-returnnull
// RUN: %env_scudo_opts="hard_rss_limit_mb=32:allocator_may_return_null=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
// RUN: %env_scudo_opts="hard_rss_limit_mb=32:allocator_may_return_null=1" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
// RUN: %env_scudo_opts="hard_rss_limit_mb=32:allocator_may_return_null=0:can_use_proc_maps_statm=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
// RUN: %env_scudo_opts="hard_rss_limit_mb=32:allocator_may_return_null=1:can_use_proc_maps_statm=0" not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-hardlimit
// Tests that the soft and hard RSS limits work as intended. Without limit or
// with a high limit, the test should pass without any malloc returning NULL or
// the program dying.
// If a limit is specified, it should return some NULL or die depending on
// allocator_may_return_null. This should also work without statm.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static const size_t kNumAllocs = 64;
static const size_t kAllocSize = 1 << 20; // 1MB.
static void *allocs[kNumAllocs];
int main(int argc, char *argv[]) {
int returned_null = 0;
for (int i = 0; i < kNumAllocs; i++) {
// sleep for 100ms every 8 allocations, to allow the RSS check to catch up.
if (i != 0 && (i & 0x7) == 0)
usleep(100000);
allocs[i] = malloc(kAllocSize);
if (allocs[i])
memset(allocs[i], 0xff, kAllocSize); // Dirty the pages.
else
returned_null++;
}
for (int i = 0; i < kNumAllocs; i++)
free(allocs[i]);
if (returned_null == 0)
printf("All malloc calls succeeded\n");
else
printf("%d malloc calls returned NULL\n", returned_null);
return 0;
}
// CHECK-nolimit: All malloc calls succeeded
// CHECK-softlimit: soft RSS limit exhausted
// CHECK-softlimit-NOT: malloc calls
// CHECK-softlimit-returnnull: soft RSS limit exhausted
// CHECK-softlimit-returnnull: malloc calls returned NULL
// CHECK-hardlimit: hard RSS limit exhausted
// CHECK-hardlimit-NOT: malloc calls
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