Merge "[cfi] Adjust RLIMIT_AS by CFI shadow size." am: 3e834d18

#include "MediaUtils.h"

extern "C" size_t __cfi_shadow_size();

namespace android {

void limitProcessMemory(

    if (propVal > 0 && uint64_t(propVal) <= SIZE_MAX) {

        maxMem = propVal;

    }

    // Increase by the size of the CFI shadow mapping. Most of the shadow is not

    // backed with physical pages, and it is possible for the result to be

    // higher than total physical memory. This is fine for RLIMIT_AS.

    size_t cfi_size = __cfi_shadow_size();

    if (cfi_size) {

      ALOGV("cfi shadow size: %zu", cfi_size);

      if (maxMem <= SIZE_MAX - cfi_size) {

        maxMem += cfi_size;

      } else {

        maxMem = SIZE_MAX;

      }

    }

    ALOGV("actual limit: %zu", maxMem);

    struct rlimit limit;