diff --git a/libc/Android.mk b/libc/Android.mk
index e3fb2a1..5e86dac 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -273,8 +273,6 @@
     upstream-netbsd/lib/libc/gen/psignal.c \
     upstream-netbsd/lib/libc/gen/utime.c \
     upstream-netbsd/lib/libc/gen/utmp.c \
-    upstream-netbsd/lib/libc/isc/ev_streams.c \
-    upstream-netbsd/lib/libc/isc/ev_timers.c \
     upstream-netbsd/lib/libc/regex/regcomp.c \
     upstream-netbsd/lib/libc/regex/regerror.c \
     upstream-netbsd/lib/libc/regex/regexec.c \
@@ -619,15 +617,21 @@
 
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES := $(call all-c-files-under,dns)
+LOCAL_SRC_FILES := \
+    $(call all-c-files-under,dns) \
+    upstream-netbsd/lib/libc/isc/ev_streams.c \
+    upstream-netbsd/lib/libc/isc/ev_timers.c \
+
 LOCAL_CFLAGS := \
     $(libc_common_cflags) \
     -DANDROID_CHANGES \
     -DINET6 \
+    -fvisibility=hidden \
     -I$(LOCAL_PATH)/dns/include \
     -I$(LOCAL_PATH)/private \
     -I$(LOCAL_PATH)/upstream-netbsd/lib/libc/include \
-    -include upstream-netbsd/android/include/netbsd-compat.h \
+    -I$(LOCAL_PATH)/upstream-netbsd/android/include \
+    -include netbsd-compat.h \
 #    -Werror \
 
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
diff --git a/libc/bionic/malloc_debug_check.cpp b/libc/bionic/malloc_debug_check.cpp
index 0575595..faf61bf 100644
--- a/libc/bionic/malloc_debug_check.cpp
+++ b/libc/bionic/malloc_debug_check.cpp
@@ -326,14 +326,19 @@
     }
 }
 
-extern "C" void* chk_malloc(size_t size) {
+extern "C" void* chk_malloc(size_t bytes) {
 //  log_message("%s: %s\n", __FILE__, __FUNCTION__);
 
-    hdr_t* hdr = static_cast<hdr_t*>(Malloc(malloc)(sizeof(hdr_t) + size + sizeof(ftr_t)));
+    size_t size = sizeof(hdr_t) + bytes + sizeof(ftr_t);
+    if (size < bytes) { // Overflow
+        errno = ENOMEM;
+        return NULL;
+    }
+    hdr_t* hdr = static_cast<hdr_t*>(Malloc(malloc)(size));
     if (hdr) {
         hdr->base = hdr;
         hdr->bt_depth = get_backtrace(hdr->bt, MAX_BACKTRACE_DEPTH);
-        add(hdr, size);
+        add(hdr, bytes);
         return user(hdr);
     }
     return NULL;
@@ -411,15 +416,15 @@
     }
 }
 
-extern "C" void* chk_realloc(void* ptr, size_t size) {
+extern "C" void* chk_realloc(void* ptr, size_t bytes) {
 //  log_message("%s: %s\n", __FILE__, __FUNCTION__);
 
     if (!ptr) {
-        return chk_malloc(size);
+        return chk_malloc(bytes);
     }
 
 #ifdef REALLOC_ZERO_BYTES_FREE
-    if (!size) {
+    if (!bytes) {
         chk_free(ptr);
         return NULL;
     }
@@ -432,7 +437,7 @@
         int depth = get_backtrace(bt, MAX_BACKTRACE_DEPTH);
         if (hdr->tag == BACKLOG_TAG) {
             log_message("+++ REALLOCATION %p SIZE %d OF FREED MEMORY!\n",
-                       user(hdr), size, hdr->size);
+                       user(hdr), bytes, hdr->size);
             log_message("+++ ALLOCATION %p SIZE %d ALLOCATED HERE:\n",
                        user(hdr), hdr->size);
             log_backtrace(hdr->bt, hdr->bt_depth);
@@ -451,47 +456,54 @@
             del_from_backlog(hdr);
         } else {
             log_message("+++ REALLOCATION %p SIZE %d IS CORRUPTED OR NOT ALLOCATED VIA TRACKER!\n",
-                       user(hdr), size);
+                       user(hdr), bytes);
             log_backtrace(bt, depth);
             // just get a whole new allocation and leak the old one
-            return Malloc(realloc)(0, size);
-            // return realloc(user(hdr), size); // assuming it was allocated externally
+            return Malloc(realloc)(0, bytes);
+            // return realloc(user(hdr), bytes); // assuming it was allocated externally
         }
     }
 
+    size_t size = sizeof(hdr_t) + bytes + sizeof(ftr_t);
+    if (size < bytes) { // Overflow
+        errno = ENOMEM;
+        return NULL;
+    }
     if (hdr->base != hdr) {
         // An allocation from memalign, so create another allocation and
         // copy the data out.
-        void* newMem = Malloc(malloc)(sizeof(hdr_t) + size + sizeof(ftr_t));
-        if (newMem) {
-            memcpy(newMem, hdr, sizeof(hdr_t) + hdr->size);
-            Malloc(free)(hdr->base);
-            hdr = static_cast<hdr_t*>(newMem);
-        } else {
-            Malloc(free)(hdr->base);
-            hdr = NULL;
+        void* newMem = Malloc(malloc)(size);
+        if (newMem == NULL) {
+            return NULL;
         }
+        memcpy(newMem, hdr, sizeof(hdr_t) + hdr->size);
+        Malloc(free)(hdr->base);
+        hdr = static_cast<hdr_t*>(newMem);
     } else {
-        hdr = static_cast<hdr_t*>(Malloc(realloc)(hdr, sizeof(hdr_t) + size + sizeof(ftr_t)));
+        hdr = static_cast<hdr_t*>(Malloc(realloc)(hdr, size));
     }
     if (hdr) {
         hdr->base = hdr;
         hdr->bt_depth = get_backtrace(hdr->bt, MAX_BACKTRACE_DEPTH);
-        add(hdr, size);
+        add(hdr, bytes);
         return user(hdr);
     }
-
     return NULL;
 }
 
-extern "C" void* chk_calloc(int nmemb, size_t size) {
+extern "C" void* chk_calloc(size_t nmemb, size_t bytes) {
 //  log_message("%s: %s\n", __FILE__, __FUNCTION__);
-    size_t total_size = nmemb * size;
-    hdr_t* hdr = static_cast<hdr_t*>(Malloc(calloc)(1, sizeof(hdr_t) + total_size + sizeof(ftr_t)));
+    size_t total_bytes = nmemb * bytes;
+    size_t size = sizeof(hdr_t) + total_bytes + sizeof(ftr_t);
+    if (size < total_bytes || (nmemb && SIZE_MAX / nmemb < bytes)) { // Overflow
+        errno = ENOMEM;
+        return NULL;
+    }
+    hdr_t* hdr = static_cast<hdr_t*>(Malloc(calloc)(1, size));
     if (hdr) {
         hdr->base = hdr;
         hdr->bt_depth = get_backtrace(hdr->bt, MAX_BACKTRACE_DEPTH);
-        add(hdr, total_size);
+        add(hdr, total_bytes);
         return user(hdr);
     }
     return NULL;
@@ -509,6 +521,33 @@
     return hdr->size;
 }
 
+extern "C" struct mallinfo chk_mallinfo() {
+  return Malloc(mallinfo)();
+}
+
+extern "C" int chk_posix_memalign(void** memptr, size_t alignment, size_t size) {
+  if ((alignment & (alignment - 1)) != 0) {
+    return EINVAL;
+  }
+  int saved_errno = errno;
+  *memptr = chk_memalign(alignment, size);
+  errno = saved_errno;
+  return (*memptr != NULL) ? 0 : ENOMEM;
+}
+
+extern "C" void* chk_pvalloc(size_t bytes) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  size_t size = (bytes + pagesize - 1) & ~(pagesize - 1);
+  if (size < bytes) { // Overflow
+    return NULL;
+  }
+  return chk_memalign(pagesize, size);
+}
+
+extern "C" void* chk_valloc(size_t size) {
+  return chk_memalign(sysconf(_SC_PAGESIZE), size);
+}
+
 static void ReportMemoryLeaks() {
   // Use /proc/self/exe link to obtain the program name for logging
   // purposes. If it's not available, we set it to "<unknown>".
diff --git a/libc/bionic/malloc_debug_common.cpp b/libc/bionic/malloc_debug_common.cpp
index 77ec080..6677c22 100644
--- a/libc/bionic/malloc_debug_common.cpp
+++ b/libc/bionic/malloc_debug_common.cpp
@@ -26,19 +26,17 @@
  * SUCH DAMAGE.
  */
 
-/*
- * Contains definition of structures, global variables, and implementation of
- * routines that are used by malloc leak detection code and other components in
- * the system. The trick is that some components expect these data and
- * routines to be defined / implemented in libc.so library, regardless
- * whether or not MALLOC_LEAK_CHECK macro is defined. To make things even
- * more tricky, malloc leak detection code, implemented in
- * libc_malloc_debug.so also requires access to these variables and routines
- * (to fill allocation entry hash table, for example). So, all relevant
- * variables and routines are defined / implemented here and exported
- * to all, leak detection code and other components via dynamic (libc.so),
- * or static (libc.a) linking.
- */
+// Contains definition of structures, global variables, and implementation of
+// routines that are used by malloc leak detection code and other components in
+// the system. The trick is that some components expect these data and
+// routines to be defined / implemented in libc.so library, regardless
+// whether or not MALLOC_LEAK_CHECK macro is defined. To make things even
+// more tricky, malloc leak detection code, implemented in
+// libc_malloc_debug.so also requires access to these variables and routines
+// (to fill allocation entry hash table, for example). So, all relevant
+// variables and routines are defined / implemented here and exported
+// to all, leak detection code and other components via dynamic (libc.so),
+// or static (libc.a) linking.
 
 #include "malloc_debug_common.h"
 
@@ -56,7 +54,16 @@
 // Support for malloc debugging.
 // Table for dispatching malloc calls, initialized with default dispatchers.
 static const MallocDebug __libc_malloc_default_dispatch __attribute__((aligned(32))) = {
-  Malloc(malloc), Malloc(free), Malloc(calloc), Malloc(realloc), Malloc(memalign), Malloc(malloc_usable_size),
+  Malloc(calloc),
+  Malloc(free),
+  Malloc(mallinfo),
+  Malloc(malloc),
+  Malloc(malloc_usable_size),
+  Malloc(memalign),
+  Malloc(posix_memalign),
+  Malloc(pvalloc),
+  Malloc(realloc),
+  Malloc(valloc),
 };
 
 // Selector of dispatch table to use for dispatching malloc calls.
@@ -97,176 +104,174 @@
 // =============================================================================
 
 static int hash_entry_compare(const void* arg1, const void* arg2) {
-    int result;
+  int result;
 
-    const HashEntry* e1 = *static_cast<HashEntry* const*>(arg1);
-    const HashEntry* e2 = *static_cast<HashEntry* const*>(arg2);
+  const HashEntry* e1 = *static_cast<HashEntry* const*>(arg1);
+  const HashEntry* e2 = *static_cast<HashEntry* const*>(arg2);
 
-    // if one or both arg pointers are null, deal gracefully
-    if (e1 == NULL) {
-        result = (e2 == NULL) ? 0 : 1;
-    } else if (e2 == NULL) {
-        result = -1;
+  // if one or both arg pointers are null, deal gracefully
+  if (e1 == NULL) {
+    result = (e2 == NULL) ? 0 : 1;
+  } else if (e2 == NULL) {
+    result = -1;
+  } else {
+    size_t nbAlloc1 = e1->allocations;
+    size_t nbAlloc2 = e2->allocations;
+    size_t size1 = e1->size & ~SIZE_FLAG_MASK;
+    size_t size2 = e2->size & ~SIZE_FLAG_MASK;
+    size_t alloc1 = nbAlloc1 * size1;
+    size_t alloc2 = nbAlloc2 * size2;
+
+    // sort in descending order by:
+    // 1) total size
+    // 2) number of allocations
+    //
+    // This is used for sorting, not determination of equality, so we don't
+    // need to compare the bit flags.
+    if (alloc1 > alloc2) {
+      result = -1;
+    } else if (alloc1 < alloc2) {
+      result = 1;
     } else {
-        size_t nbAlloc1 = e1->allocations;
-        size_t nbAlloc2 = e2->allocations;
-        size_t size1 = e1->size & ~SIZE_FLAG_MASK;
-        size_t size2 = e2->size & ~SIZE_FLAG_MASK;
-        size_t alloc1 = nbAlloc1 * size1;
-        size_t alloc2 = nbAlloc2 * size2;
-
-        // sort in descending order by:
-        // 1) total size
-        // 2) number of allocations
-        //
-        // This is used for sorting, not determination of equality, so we don't
-        // need to compare the bit flags.
-        if (alloc1 > alloc2) {
-            result = -1;
-        } else if (alloc1 < alloc2) {
-            result = 1;
-        } else {
-            if (nbAlloc1 > nbAlloc2) {
-                result = -1;
-            } else if (nbAlloc1 < nbAlloc2) {
-                result = 1;
-            } else {
-                result = 0;
-            }
-        }
+      if (nbAlloc1 > nbAlloc2) {
+        result = -1;
+      } else if (nbAlloc1 < nbAlloc2) {
+        result = 1;
+      } else {
+        result = 0;
+      }
     }
-    return result;
+  }
+  return result;
 }
 
-/*
- * Retrieve native heap information.
- *
- * "*info" is set to a buffer we allocate
- * "*overallSize" is set to the size of the "info" buffer
- * "*infoSize" is set to the size of a single entry
- * "*totalMemory" is set to the sum of all allocations we're tracking; does
- *   not include heap overhead
- * "*backtraceSize" is set to the maximum number of entries in the back trace
- */
+// Retrieve native heap information.
+//
+// "*info" is set to a buffer we allocate
+// "*overallSize" is set to the size of the "info" buffer
+// "*infoSize" is set to the size of a single entry
+// "*totalMemory" is set to the sum of all allocations we're tracking; does
+//   not include heap overhead
+// "*backtraceSize" is set to the maximum number of entries in the back trace
 
+// =============================================================================
 // Exported for use by ddms.
+// =============================================================================
 extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
-        size_t* infoSize, size_t* totalMemory, size_t* backtraceSize) {
-    // don't do anything if we have invalid arguments
-    if (info == NULL || overallSize == NULL || infoSize == NULL ||
-            totalMemory == NULL || backtraceSize == NULL) {
-        return;
+    size_t* infoSize, size_t* totalMemory, size_t* backtraceSize) {
+  // Don't do anything if we have invalid arguments.
+  if (info == NULL || overallSize == NULL || infoSize == NULL ||
+    totalMemory == NULL || backtraceSize == NULL) {
+    return;
+  }
+  *totalMemory = 0;
+
+  ScopedPthreadMutexLocker locker(&g_hash_table.lock);
+  if (g_hash_table.count == 0) {
+    *info = NULL;
+    *overallSize = 0;
+    *infoSize = 0;
+    *backtraceSize = 0;
+    return;
+  }
+
+  HashEntry** list = static_cast<HashEntry**>(Malloc(malloc)(sizeof(void*) * g_hash_table.count));
+
+  // Get the entries into an array to be sorted.
+  size_t index = 0;
+  for (size_t i = 0 ; i < HASHTABLE_SIZE ; ++i) {
+    HashEntry* entry = g_hash_table.slots[i];
+    while (entry != NULL) {
+      list[index] = entry;
+      *totalMemory = *totalMemory + ((entry->size & ~SIZE_FLAG_MASK) * entry->allocations);
+      index++;
+      entry = entry->next;
     }
-    *totalMemory = 0;
+  }
 
-    ScopedPthreadMutexLocker locker(&g_hash_table.lock);
+  // XXX: the protocol doesn't allow variable size for the stack trace (yet)
+  *infoSize = (sizeof(size_t) * 2) + (sizeof(uintptr_t) * BACKTRACE_SIZE);
+  *overallSize = *infoSize * g_hash_table.count;
+  *backtraceSize = BACKTRACE_SIZE;
 
-    if (g_hash_table.count == 0) {
-        *info = NULL;
-        *overallSize = 0;
-        *infoSize = 0;
-        *backtraceSize = 0;
-        return;
-    }
-
-    HashEntry** list = static_cast<HashEntry**>(Malloc(malloc)(sizeof(void*) * g_hash_table.count));
-
-    // get the entries into an array to be sorted
-    int index = 0;
-    for (size_t i = 0 ; i < HASHTABLE_SIZE ; ++i) {
-        HashEntry* entry = g_hash_table.slots[i];
-        while (entry != NULL) {
-            list[index] = entry;
-            *totalMemory = *totalMemory +
-                ((entry->size & ~SIZE_FLAG_MASK) * entry->allocations);
-            index++;
-            entry = entry->next;
-        }
-    }
-
-    // XXX: the protocol doesn't allow variable size for the stack trace (yet)
-    *infoSize = (sizeof(size_t) * 2) + (sizeof(uintptr_t) * BACKTRACE_SIZE);
-    *overallSize = *infoSize * g_hash_table.count;
-    *backtraceSize = BACKTRACE_SIZE;
-
-    // now get a byte array big enough for this
-    *info = static_cast<uint8_t*>(Malloc(malloc)(*overallSize));
-
-    if (*info == NULL) {
-        *overallSize = 0;
-        Malloc(free)(list);
-        return;
-    }
-
-    qsort(list, g_hash_table.count, sizeof(void*), hash_entry_compare);
-
-    uint8_t* head = *info;
-    const int count = g_hash_table.count;
-    for (int i = 0 ; i < count ; ++i) {
-        HashEntry* entry = list[i];
-        size_t entrySize = (sizeof(size_t) * 2) + (sizeof(uintptr_t) * entry->numEntries);
-        if (entrySize < *infoSize) {
-            /* we're writing less than a full entry, clear out the rest */
-            memset(head + entrySize, 0, *infoSize - entrySize);
-        } else {
-            /* make sure the amount we're copying doesn't exceed the limit */
-            entrySize = *infoSize;
-        }
-        memcpy(head, &(entry->size), entrySize);
-        head += *infoSize;
-    }
-
+  // now get a byte array big enough for this
+  *info = static_cast<uint8_t*>(Malloc(malloc)(*overallSize));
+  if (*info == NULL) {
+    *overallSize = 0;
     Malloc(free)(list);
+    return;
+  }
+
+  qsort(list, g_hash_table.count, sizeof(void*), hash_entry_compare);
+
+  uint8_t* head = *info;
+  const size_t count = g_hash_table.count;
+  for (size_t i = 0 ; i < count ; ++i) {
+    HashEntry* entry = list[i];
+    size_t entrySize = (sizeof(size_t) * 2) + (sizeof(uintptr_t) * entry->numEntries);
+    if (entrySize < *infoSize) {
+      // We're writing less than a full entry, clear out the rest.
+      memset(head + entrySize, 0, *infoSize - entrySize);
+    } else {
+      // Make sure the amount we're copying doesn't exceed the limit.
+      entrySize = *infoSize;
+    }
+    memcpy(head, &(entry->size), entrySize);
+    head += *infoSize;
+  }
+
+  Malloc(free)(list);
 }
 
-// Exported for use by ddms.
 extern "C" void free_malloc_leak_info(uint8_t* info) {
-    Malloc(free)(info);
+  Malloc(free)(info);
 }
 
-extern "C" struct mallinfo mallinfo() {
-    return Malloc(mallinfo)();
-}
-
-extern "C" void* valloc(size_t bytes) {
-    return Malloc(valloc)(bytes);
-}
-
-extern "C" void* pvalloc(size_t bytes) {
-    return Malloc(pvalloc)(bytes);
-}
-
-extern "C" int posix_memalign(void** memptr, size_t alignment, size_t size) {
-    return Malloc(posix_memalign)(memptr, alignment, size);
-}
-
-extern "C" void* malloc(size_t bytes) {
-    return __libc_malloc_dispatch->malloc(bytes);
+// =============================================================================
+// Allocation functions
+// =============================================================================
+extern "C" void* calloc(size_t n_elements, size_t elem_size) {
+  return __libc_malloc_dispatch->calloc(n_elements, elem_size);
 }
 
 extern "C" void free(void* mem) {
-    __libc_malloc_dispatch->free(mem);
+  __libc_malloc_dispatch->free(mem);
 }
 
-extern "C" void* calloc(size_t n_elements, size_t elem_size) {
-    return __libc_malloc_dispatch->calloc(n_elements, elem_size);
+extern "C" struct mallinfo mallinfo() {
+  return __libc_malloc_dispatch->mallinfo();
 }
 
-extern "C" void* realloc(void* oldMem, size_t bytes) {
-    return __libc_malloc_dispatch->realloc(oldMem, bytes);
-}
-
-extern "C" void* memalign(size_t alignment, size_t bytes) {
-    return __libc_malloc_dispatch->memalign(alignment, bytes);
+extern "C" void* malloc(size_t bytes) {
+  return __libc_malloc_dispatch->malloc(bytes);
 }
 
 extern "C" size_t malloc_usable_size(const void* mem) {
-    return __libc_malloc_dispatch->malloc_usable_size(mem);
+  return __libc_malloc_dispatch->malloc_usable_size(mem);
 }
 
-/* We implement malloc debugging only in libc.so, so code below
- * must be excluded if we compile this file for static libc.a
- */
+extern "C" void* memalign(size_t alignment, size_t bytes) {
+  return __libc_malloc_dispatch->memalign(alignment, bytes);
+}
+
+extern "C" int posix_memalign(void** memptr, size_t alignment, size_t size) {
+  return __libc_malloc_dispatch->posix_memalign(memptr, alignment, size);
+}
+
+extern "C" void* pvalloc(size_t bytes) {
+  return __libc_malloc_dispatch->pvalloc(bytes);
+}
+
+extern "C" void* realloc(void* oldMem, size_t bytes) {
+  return __libc_malloc_dispatch->realloc(oldMem, bytes);
+}
+
+extern "C" void* valloc(size_t bytes) {
+  return __libc_malloc_dispatch->valloc(bytes);
+}
+
+// We implement malloc debugging only in libc.so, so the code below
+// must be excluded if we compile this file for static libc.a
 #ifndef LIBC_STATIC
 #include <sys/system_properties.h>
 #include <dlfcn.h>
@@ -275,227 +280,222 @@
 
 template<typename FunctionType>
 static void InitMallocFunction(void* malloc_impl_handler, FunctionType* func, const char* prefix, const char* suffix) {
-    char symbol[128];
-    snprintf(symbol, sizeof(symbol), "%s_%s", prefix, suffix);
-    *func = reinterpret_cast<FunctionType>(dlsym(malloc_impl_handler, symbol));
-    if (*func == NULL) {
-        error_log("%s: dlsym(\"%s\") failed", getprogname(), symbol);
-    }
+  char symbol[128];
+  snprintf(symbol, sizeof(symbol), "%s_%s", prefix, suffix);
+  *func = reinterpret_cast<FunctionType>(dlsym(malloc_impl_handler, symbol));
+  if (*func == NULL) {
+    error_log("%s: dlsym(\"%s\") failed", getprogname(), symbol);
+  }
 }
 
 static void InitMalloc(void* malloc_impl_handler, MallocDebug* table, const char* prefix) {
-    __libc_format_log(ANDROID_LOG_INFO, "libc", "%s: using libc.debug.malloc %d (%s)\n",
-                      getprogname(), g_malloc_debug_level, prefix);
+  __libc_format_log(ANDROID_LOG_INFO, "libc", "%s: using libc.debug.malloc %d (%s)\n",
+                    getprogname(), g_malloc_debug_level, prefix);
 
-    InitMallocFunction<MallocDebugMalloc>(malloc_impl_handler, &table->malloc, prefix, "malloc");
-    InitMallocFunction<MallocDebugFree>(malloc_impl_handler, &table->free, prefix, "free");
-    InitMallocFunction<MallocDebugCalloc>(malloc_impl_handler, &table->calloc, prefix, "calloc");
-    InitMallocFunction<MallocDebugRealloc>(malloc_impl_handler, &table->realloc, prefix, "realloc");
-    InitMallocFunction<MallocDebugMemalign>(malloc_impl_handler, &table->memalign, prefix, "memalign");
-    InitMallocFunction<MallocDebugMallocUsableSize>(malloc_impl_handler, &table->malloc_usable_size, prefix, "malloc_usable_size");
+  InitMallocFunction<MallocDebugCalloc>(malloc_impl_handler, &table->calloc, prefix, "calloc");
+  InitMallocFunction<MallocDebugFree>(malloc_impl_handler, &table->free, prefix, "free");
+  InitMallocFunction<MallocDebugMallinfo>(malloc_impl_handler, &table->mallinfo, prefix, "mallinfo");
+  InitMallocFunction<MallocDebugMalloc>(malloc_impl_handler, &table->malloc, prefix, "malloc");
+  InitMallocFunction<MallocDebugMallocUsableSize>(malloc_impl_handler, &table->malloc_usable_size, prefix, "malloc_usable_size");
+  InitMallocFunction<MallocDebugMemalign>(malloc_impl_handler, &table->memalign, prefix, "memalign");
+  InitMallocFunction<MallocDebugPosixMemalign>(malloc_impl_handler, &table->posix_memalign, prefix, "posix_memalign");
+  InitMallocFunction<MallocDebugPvalloc>(malloc_impl_handler, &table->pvalloc, prefix, "pvalloc");
+  InitMallocFunction<MallocDebugRealloc>(malloc_impl_handler, &table->realloc, prefix, "realloc");
+  InitMallocFunction<MallocDebugValloc>(malloc_impl_handler, &table->valloc, prefix, "valloc");
 }
 
-/* Initializes memory allocation framework once per process. */
+// Initializes memory allocation framework once per process.
 static void malloc_init_impl() {
-    const char* so_name = NULL;
-    MallocDebugInit malloc_debug_initialize = NULL;
-    unsigned int qemu_running = 0;
-    unsigned int memcheck_enabled = 0;
-    char env[PROP_VALUE_MAX];
-    char memcheck_tracing[PROP_VALUE_MAX];
-    char debug_program[PROP_VALUE_MAX];
+  const char* so_name = NULL;
+  MallocDebugInit malloc_debug_initialize = NULL;
+  unsigned int qemu_running = 0;
+  unsigned int memcheck_enabled = 0;
+  char env[PROP_VALUE_MAX];
+  char memcheck_tracing[PROP_VALUE_MAX];
+  char debug_program[PROP_VALUE_MAX];
 
-    /* Get custom malloc debug level. Note that emulator started with
-     * memory checking option will have priority over debug level set in
-     * libc.debug.malloc system property. */
-    if (__system_property_get("ro.kernel.qemu", env) && atoi(env)) {
-        qemu_running = 1;
-        if (__system_property_get("ro.kernel.memcheck", memcheck_tracing)) {
-            if (memcheck_tracing[0] != '0') {
-                // Emulator has started with memory tracing enabled. Enforce it.
-                g_malloc_debug_level = 20;
-                memcheck_enabled = 1;
-            }
-        }
+  // Get custom malloc debug level. Note that emulator started with
+  // memory checking option will have priority over debug level set in
+  // libc.debug.malloc system property.
+  if (__system_property_get("ro.kernel.qemu", env) && atoi(env)) {
+    qemu_running = 1;
+    if (__system_property_get("ro.kernel.memcheck", memcheck_tracing)) {
+      if (memcheck_tracing[0] != '0') {
+        // Emulator has started with memory tracing enabled. Enforce it.
+        g_malloc_debug_level = 20;
+        memcheck_enabled = 1;
+      }
     }
+  }
 
-    /* If debug level has not been set by memcheck option in the emulator,
-     * lets grab it from libc.debug.malloc system property. */
-    if (g_malloc_debug_level == 0 && __system_property_get("libc.debug.malloc", env)) {
-        g_malloc_debug_level = atoi(env);
+  // If debug level has not been set by memcheck option in the emulator,
+  // lets grab it from libc.debug.malloc system property.
+  if (g_malloc_debug_level == 0 && __system_property_get("libc.debug.malloc", env)) {
+    g_malloc_debug_level = atoi(env);
+  }
+
+  // Debug level 0 means that we should use default allocation routines.
+  if (g_malloc_debug_level == 0) {
+    return;
+  }
+
+  // If libc.debug.malloc.program is set and is not a substring of progname,
+  // then exit.
+  if (__system_property_get("libc.debug.malloc.program", debug_program)) {
+    if (!strstr(getprogname(), debug_program)) {
+      return;
     }
+  }
 
-    /* Debug level 0 means that we should use default allocation routines. */
-    if (g_malloc_debug_level == 0) {
-        return;
+  // mksh is way too leaky. http://b/7291287.
+  if (g_malloc_debug_level >= 10) {
+    if (strcmp(getprogname(), "sh") == 0 || strcmp(getprogname(), "/system/bin/sh") == 0) {
+      return;
     }
+  }
 
-    /* If libc.debug.malloc.program is set and is not a substring of progname,
-     * then exit.
-     */
-    if (__system_property_get("libc.debug.malloc.program", debug_program)) {
-        if (!strstr(getprogname(), debug_program)) {
-            return;
-        }
-    }
-
-    // mksh is way too leaky. http://b/7291287.
-    if (g_malloc_debug_level >= 10) {
-        if (strcmp(getprogname(), "sh") == 0 || strcmp(getprogname(), "/system/bin/sh") == 0) {
-            return;
-        }
-    }
-
-    // Choose the appropriate .so for the requested debug level.
-    switch (g_malloc_debug_level) {
-        case 1:
-        case 5:
-        case 10:
-            so_name = "libc_malloc_debug_leak.so";
-            break;
-        case 20:
-            // Quick check: debug level 20 can only be handled in emulator.
-            if (!qemu_running) {
-                error_log("%s: Debug level %d can only be set in emulator\n",
-                          getprogname(), g_malloc_debug_level);
-                return;
-            }
-            // Make sure that memory checking has been enabled in emulator.
-            if (!memcheck_enabled) {
-                error_log("%s: Memory checking is not enabled in the emulator\n",
-                          getprogname());
-                return;
-            }
-            so_name = "libc_malloc_debug_qemu.so";
-            break;
-        default:
-            error_log("%s: Debug level %d is unknown\n", getprogname(), g_malloc_debug_level);
-            return;
-    }
-
-    // Load .so that implements the required malloc debugging functionality.
-    void* malloc_impl_handle = dlopen(so_name, RTLD_LAZY);
-    if (malloc_impl_handle == NULL) {
-        error_log("%s: Missing module %s required for malloc debug level %d: %s",
-                  getprogname(), so_name, g_malloc_debug_level, dlerror());
-        return;
-    }
-
-    // Initialize malloc debugging in the loaded module.
-    malloc_debug_initialize = reinterpret_cast<MallocDebugInit>(dlsym(malloc_impl_handle,
-                                                                      "malloc_debug_initialize"));
-    if (malloc_debug_initialize == NULL) {
-        error_log("%s: Initialization routine is not found in %s\n",
-                  getprogname(), so_name);
-        dlclose(malloc_impl_handle);
-        return;
-    }
-    if (malloc_debug_initialize(&g_hash_table) == -1) {
-        dlclose(malloc_impl_handle);
-        return;
-    }
-
-    if (g_malloc_debug_level == 20) {
-        // For memory checker we need to do extra initialization.
-        typedef int (*MemCheckInit)(int, const char*);
-        MemCheckInit memcheck_initialize =
-            reinterpret_cast<MemCheckInit>(dlsym(malloc_impl_handle,
-                                                 "memcheck_initialize"));
-        if (memcheck_initialize == NULL) {
-            error_log("%s: memcheck_initialize routine is not found in %s\n",
-                      getprogname(), so_name);
-            dlclose(malloc_impl_handle);
-            return;
-        }
-
-        if (memcheck_initialize(MALLOC_ALIGNMENT, memcheck_tracing)) {
-            dlclose(malloc_impl_handle);
-            return;
-        }
-    }
-
-    // Initialize malloc dispatch table with appropriate routines.
-    static MallocDebug malloc_dispatch_table __attribute__((aligned(32))) = {
-        Malloc(malloc),
-        Malloc(free),
-        Malloc(calloc),
-        Malloc(realloc),
-        Malloc(memalign),
-        Malloc(malloc_usable_size)
-    };
-
-    switch (g_malloc_debug_level) {
-        case 1:
-            InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "leak");
-            break;
-        case 5:
-            InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "fill");
-            break;
-        case 10:
-            InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "chk");
-            break;
-        case 20:
-            InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "qemu_instrumented");
-            break;
-        default:
-            break;
-    }
-
-    // Make sure dispatch table is initialized
-    if ((malloc_dispatch_table.malloc == NULL) ||
-        (malloc_dispatch_table.free == NULL) ||
-        (malloc_dispatch_table.calloc == NULL) ||
-        (malloc_dispatch_table.realloc == NULL) ||
-        (malloc_dispatch_table.memalign == NULL) ||
-        (malloc_dispatch_table.malloc_usable_size == NULL)) {
-        error_log("%s: some symbols for libc.debug.malloc level %d were not found (see above)",
+  // Choose the appropriate .so for the requested debug level.
+  switch (g_malloc_debug_level) {
+    case 1:
+    case 5:
+    case 10:
+      so_name = "libc_malloc_debug_leak.so";
+      break;
+    case 20:
+      // Quick check: debug level 20 can only be handled in emulator.
+      if (!qemu_running) {
+        error_log("%s: Debug level %d can only be set in emulator\n",
                   getprogname(), g_malloc_debug_level);
-        dlclose(malloc_impl_handle);
-    } else {
-        __libc_malloc_dispatch = &malloc_dispatch_table;
-        libc_malloc_impl_handle = malloc_impl_handle;
+        return;
+      }
+      // Make sure that memory checking has been enabled in emulator.
+      if (!memcheck_enabled) {
+        error_log("%s: Memory checking is not enabled in the emulator\n", getprogname());
+        return;
+      }
+      so_name = "libc_malloc_debug_qemu.so";
+      break;
+    default:
+      error_log("%s: Debug level %d is unknown\n", getprogname(), g_malloc_debug_level);
+      return;
+  }
+
+  // Load .so that implements the required malloc debugging functionality.
+  void* malloc_impl_handle = dlopen(so_name, RTLD_LAZY);
+  if (malloc_impl_handle == NULL) {
+    error_log("%s: Missing module %s required for malloc debug level %d: %s",
+              getprogname(), so_name, g_malloc_debug_level, dlerror());
+    return;
+  }
+
+  // Initialize malloc debugging in the loaded module.
+  malloc_debug_initialize = reinterpret_cast<MallocDebugInit>(dlsym(malloc_impl_handle,
+                                                                    "malloc_debug_initialize"));
+  if (malloc_debug_initialize == NULL) {
+    error_log("%s: Initialization routine is not found in %s\n", getprogname(), so_name);
+    dlclose(malloc_impl_handle);
+    return;
+  }
+  if (malloc_debug_initialize(&g_hash_table) == -1) {
+    dlclose(malloc_impl_handle);
+    return;
+  }
+
+  if (g_malloc_debug_level == 20) {
+    // For memory checker we need to do extra initialization.
+    typedef int (*MemCheckInit)(int, const char*);
+    MemCheckInit memcheck_initialize =
+      reinterpret_cast<MemCheckInit>(dlsym(malloc_impl_handle, "memcheck_initialize"));
+    if (memcheck_initialize == NULL) {
+      error_log("%s: memcheck_initialize routine is not found in %s\n",
+                getprogname(), so_name);
+      dlclose(malloc_impl_handle);
+      return;
     }
+
+    if (memcheck_initialize(MALLOC_ALIGNMENT, memcheck_tracing)) {
+      dlclose(malloc_impl_handle);
+      return;
+    }
+  }
+
+  // No need to init the dispatch table because we can only get
+  // here if debug level is 1, 5, 10, or 20.
+  static MallocDebug malloc_dispatch_table __attribute__((aligned(32)));
+  switch (g_malloc_debug_level) {
+    case 1:
+      InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "leak");
+      break;
+    case 5:
+      InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "fill");
+      break;
+    case 10:
+      InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "chk");
+      break;
+    case 20:
+      InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "qemu_instrumented");
+      break;
+    default:
+      break;
+  }
+
+  // Make sure dispatch table is initialized
+  if ((malloc_dispatch_table.calloc == NULL) ||
+      (malloc_dispatch_table.free == NULL) ||
+      (malloc_dispatch_table.mallinfo == NULL) ||
+      (malloc_dispatch_table.malloc == NULL) ||
+      (malloc_dispatch_table.malloc_usable_size == NULL) ||
+      (malloc_dispatch_table.memalign == NULL) ||
+      (malloc_dispatch_table.posix_memalign == NULL) ||
+      (malloc_dispatch_table.pvalloc == NULL) ||
+      (malloc_dispatch_table.realloc == NULL) ||
+      (malloc_dispatch_table.valloc == NULL)) {
+    error_log("%s: some symbols for libc.debug.malloc level %d were not found (see above)",
+              getprogname(), g_malloc_debug_level);
+    dlclose(malloc_impl_handle);
+  } else {
+    __libc_malloc_dispatch = &malloc_dispatch_table;
+    libc_malloc_impl_handle = malloc_impl_handle;
+  }
 }
 
 static void malloc_fini_impl() {
-    // Our BSD stdio implementation doesn't close the standard streams, it only flushes them.
-    // And it doesn't do that until its atexit handler is run, and we run first!
-    // It's great that other unclosed FILE*s show up as malloc leaks, but we need to manually
-    // clean up the standard streams ourselves.
-    fclose(stdin);
-    fclose(stdout);
-    fclose(stderr);
+  // Our BSD stdio implementation doesn't close the standard streams, it only flushes them.
+  // And it doesn't do that until its atexit handler is run, and we run first!
+  // It's great that other unclosed FILE*s show up as malloc leaks, but we need to manually
+  // clean up the standard streams ourselves.
+  fclose(stdin);
+  fclose(stdout);
+  fclose(stderr);
 
-    if (libc_malloc_impl_handle != NULL) {
-        MallocDebugFini malloc_debug_finalize =
-            reinterpret_cast<MallocDebugFini>(dlsym(libc_malloc_impl_handle,
-                                                    "malloc_debug_finalize"));
-        if (malloc_debug_finalize != NULL) {
-            malloc_debug_finalize(g_malloc_debug_level);
-        }
+  if (libc_malloc_impl_handle != NULL) {
+    MallocDebugFini malloc_debug_finalize =
+      reinterpret_cast<MallocDebugFini>(dlsym(libc_malloc_impl_handle, "malloc_debug_finalize"));
+    if (malloc_debug_finalize != NULL) {
+      malloc_debug_finalize(g_malloc_debug_level);
     }
+  }
 }
 
 #endif  // !LIBC_STATIC
 
-/* Initializes memory allocation framework.
- * This routine is called from __libc_init routines implemented
- * in libc_init_static.c and libc_init_dynamic.c files.
- */
+// Initializes memory allocation framework.
+// This routine is called from __libc_init routines implemented
+// in libc_init_static.c and libc_init_dynamic.c files.
 extern "C" __LIBC_HIDDEN__ void malloc_debug_init() {
-#if defined(USE_DL_PREFIX) && !defined(LIBC_STATIC)
+#if !defined(LIBC_STATIC)
   static pthread_once_t malloc_init_once_ctl = PTHREAD_ONCE_INIT;
   if (pthread_once(&malloc_init_once_ctl, malloc_init_impl)) {
     error_log("Unable to initialize malloc_debug component.");
   }
-#endif  // USE_DL_PREFIX && !LIBC_STATIC
+#endif  // !LIBC_STATIC
 }
 
 extern "C" __LIBC_HIDDEN__ void malloc_debug_fini() {
-#if defined(USE_DL_PREFIX) && !defined(LIBC_STATIC)
+#if !defined(LIBC_STATIC)
   static pthread_once_t malloc_fini_once_ctl = PTHREAD_ONCE_INIT;
   if (pthread_once(&malloc_fini_once_ctl, malloc_fini_impl)) {
     error_log("Unable to finalize malloc_debug component.");
   }
-#endif  // USE_DL_PREFIX && !LIBC_STATIC
+#endif  // !LIBC_STATIC
 }
diff --git a/libc/bionic/malloc_debug_common.h b/libc/bionic/malloc_debug_common.h
index 21cb44c..8052a17 100644
--- a/libc/bionic/malloc_debug_common.h
+++ b/libc/bionic/malloc_debug_common.h
@@ -83,19 +83,27 @@
 };
 
 /* Entry in malloc dispatch table. */
-typedef void* (*MallocDebugMalloc)(size_t);
-typedef void (*MallocDebugFree)(void*);
 typedef void* (*MallocDebugCalloc)(size_t, size_t);
-typedef void* (*MallocDebugRealloc)(void*, size_t);
-typedef void* (*MallocDebugMemalign)(size_t, size_t);
+typedef void (*MallocDebugFree)(void*);
+typedef struct mallinfo (*MallocDebugMallinfo)();
+typedef void* (*MallocDebugMalloc)(size_t);
 typedef size_t (*MallocDebugMallocUsableSize)(const void*);
+typedef void* (*MallocDebugMemalign)(size_t, size_t);
+typedef int (*MallocDebugPosixMemalign)(void**, size_t, size_t);
+typedef void* (*MallocDebugPvalloc)(size_t);
+typedef void* (*MallocDebugRealloc)(void*, size_t);
+typedef void* (*MallocDebugValloc)(size_t);
 struct MallocDebug {
-  MallocDebugMalloc malloc;
-  MallocDebugFree free;
   MallocDebugCalloc calloc;
-  MallocDebugRealloc realloc;
-  MallocDebugMemalign memalign;
+  MallocDebugFree free;
+  MallocDebugMallinfo mallinfo;
+  MallocDebugMalloc malloc;
   MallocDebugMallocUsableSize malloc_usable_size;
+  MallocDebugMemalign memalign;
+  MallocDebugPosixMemalign posix_memalign;
+  MallocDebugPvalloc pvalloc;
+  MallocDebugRealloc realloc;
+  MallocDebugValloc valloc;
 };
 
 typedef bool (*MallocDebugInit)(HashTable*);
diff --git a/libc/bionic/malloc_debug_leak.cpp b/libc/bionic/malloc_debug_leak.cpp
index aa7c072..2cc38cc 100644
--- a/libc/bionic/malloc_debug_leak.cpp
+++ b/libc/bionic/malloc_debug_leak.cpp
@@ -250,6 +250,33 @@
     return Malloc(malloc_usable_size)(mem);
 }
 
+extern "C" struct mallinfo fill_mallinfo() {
+  return Malloc(mallinfo)();
+}
+
+extern "C" int fill_posix_memalign(void** memptr, size_t alignment, size_t size) {
+  if ((alignment & (alignment - 1)) != 0) {
+    return EINVAL;
+  }
+  int saved_errno = errno;
+  *memptr = fill_memalign(alignment, size);
+  errno = saved_errno;
+  return (*memptr != NULL) ? 0 : ENOMEM;
+}
+
+extern "C" void* fill_pvalloc(size_t bytes) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  size_t size = (bytes + pagesize - 1) & ~(pagesize - 1);
+  if (size < bytes) { // Overflow
+    return NULL;
+  }
+  return fill_memalign(pagesize, size);
+}
+
+extern "C" void* fill_valloc(size_t size) {
+  return fill_memalign(sysconf(_SC_PAGESIZE), size);
+}
+
 // =============================================================================
 // malloc leak functions
 // =============================================================================
@@ -265,6 +292,7 @@
 
     size_t size = bytes + sizeof(AllocationEntry);
     if (size < bytes) { // Overflow.
+        errno = ENOMEM;
         return NULL;
     }
 
@@ -327,6 +355,7 @@
     // Fail on overflow - just to be safe even though this code runs only
     // within the debugging C library, not the production one.
     if (n_elements && SIZE_MAX / n_elements < elem_size) {
+        errno = ENOMEM;
         return NULL;
     }
     size_t size = n_elements * elem_size;
@@ -350,6 +379,7 @@
     } else if (header->guard != GUARD) {
         debug_log("WARNING bad header guard: '0x%x'! and invalid entry: %p\n",
                    header->guard, header->entry);
+        errno = ENOMEM;
         return NULL;
     }
 
@@ -358,8 +388,8 @@
         size_t oldSize = header->entry->size & ~SIZE_FLAG_MASK;
         size_t copySize = (oldSize <= bytes) ? oldSize : bytes;
         memcpy(newMem, oldMem, copySize);
+        leak_free(oldMem);
     }
-    leak_free(oldMem);
 
     return newMem;
 }
@@ -428,3 +458,30 @@
     }
     return 0;
 }
+
+extern "C" struct mallinfo leak_mallinfo() {
+  return Malloc(mallinfo)();
+}
+
+extern "C" int leak_posix_memalign(void** memptr, size_t alignment, size_t size) {
+  if ((alignment & (alignment - 1)) != 0) {
+    return EINVAL;
+  }
+  int saved_errno = errno;
+  *memptr = leak_memalign(alignment, size);
+  errno = saved_errno;
+  return (*memptr != NULL) ? 0 : ENOMEM;
+}
+
+extern "C" void* leak_pvalloc(size_t bytes) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  size_t size = (bytes + pagesize - 1) & ~(pagesize - 1);
+  if (size < bytes) { // Overflow
+    return NULL;
+  }
+  return leak_memalign(pagesize, size);
+}
+
+extern "C" void* leak_valloc(size_t size) {
+  return leak_memalign(sysconf(_SC_PAGESIZE), size);
+}
diff --git a/libc/bionic/malloc_debug_qemu.cpp b/libc/bionic/malloc_debug_qemu.cpp
index 2dda767..4272482 100644
--- a/libc/bionic/malloc_debug_qemu.cpp
+++ b/libc/bionic/malloc_debug_qemu.cpp
@@ -573,12 +573,16 @@
 // API routines
 // =============================================================================
 
-extern "C" void* qemu_instrumented_malloc(size_t bytes);
-extern "C" void  qemu_instrumented_free(void* mem);
-extern "C" void* qemu_instrumented_calloc(size_t n_elements, size_t elem_size);
-extern "C" void* qemu_instrumented_realloc(void* mem, size_t bytes);
-extern "C" void* qemu_instrumented_memalign(size_t alignment, size_t bytes);
-extern "C" size_t qemu_instrumented_malloc_usable_size(const void* mem);
+extern "C" void* qemu_instrumented_calloc(size_t, size_t);
+extern "C" void  qemu_instrumented_free(void*);
+extern "C" struct mallinfo qemu_instrumented_mallinfo();
+extern "C" void* qemu_instrumented_malloc(size_t);
+extern "C" size_t qemu_instrumented_malloc_usable_size(const void*);
+extern "C" void* qemu_instrumented_memalign(size_t, size_t);
+extern "C" int qemu_instrumented_posix_memalign(void**, size_t, size_t);
+extern "C" void* qemu_instrumented_pvalloc(size_t);
+extern "C" void* qemu_instrumented_realloc(void*, size_t);
+extern "C" void* qemu_instrumented_valloc(size_t);
 
 /* Initializes malloc debugging instrumentation for the emulator.
  * This routine is called from malloc_init_impl routine implemented in
@@ -680,10 +684,17 @@
     desc.prefix_size = DEFAULT_PREFIX_SIZE;
     desc.requested_bytes = bytes;
     desc.suffix_size = DEFAULT_SUFFIX_SIZE;
-    desc.ptr = Malloc(malloc)(mallocdesc_alloc_size(&desc));
+    size_t size = mallocdesc_alloc_size(&desc);
+    if (size < bytes) { // Overflow
+        qemu_error_log("<libc_pid=%03u, pid=%03u> malloc: malloc(%zu) overflow caused failure.",
+                       malloc_pid, getpid(), bytes);
+        errno = ENOMEM;
+        return NULL;
+    }
+    desc.ptr = Malloc(malloc)(size);
     if (desc.ptr == NULL) {
-        qemu_error_log("<libc_pid=%03u, pid=%03u> malloc(%zd): malloc(%u) failed.",
-                  malloc_pid, getpid(), bytes, mallocdesc_alloc_size(&desc));
+        qemu_error_log("<libc_pid=%03u, pid=%03u> malloc(%zu): malloc(%u) failed.",
+                       malloc_pid, getpid(), bytes, size);
         return NULL;
     }
 
@@ -692,12 +703,13 @@
         log_mdesc(error, &desc, "<libc_pid=%03u, pid=%03u>: malloc: notify_malloc failed for ",
                   malloc_pid, getpid());
         Malloc(free)(desc.ptr);
+        errno = ENOMEM;
         return NULL;
     } else {
 #if TEST_ACCESS_VIOLATIONS
         test_access_violation(&desc);
 #endif  // TEST_ACCESS_VIOLATIONS
-        log_mdesc(info, &desc, "+++ <libc_pid=%03u, pid=%03u> malloc(%zd) -> ",
+        log_mdesc(info, &desc, "+++ <libc_pid=%03u, pid=%03u> malloc(%zu) -> ",
                   malloc_pid, getpid(), bytes);
         return mallocdesc_user_ptr(&desc);
     }
@@ -754,13 +766,16 @@
     if (n_elements == 0 || elem_size == 0) {
         // Just let go zero bytes allocation.
         qemu_info_log("::: <libc_pid=%03u, pid=%03u>: Zero calloc redir to malloc",
-                 malloc_pid, getpid());
+                      malloc_pid, getpid());
         return qemu_instrumented_malloc(0);
     }
 
     // Fail on overflow - just to be safe even though this code runs only
     // within the debugging C library, not the production one.
     if (n_elements && SIZE_MAX / n_elements < elem_size) {
+        qemu_error_log("<libc_pid=%03u, pid=%03u> calloc: calloc(%zu, %zu) overflow caused failure.",
+                       malloc_pid, getpid(), n_elements, elem_size);
+        errno = ENOMEM;
         return NULL;
     }
 
@@ -786,6 +801,12 @@
     }
     desc.requested_bytes = n_elements * elem_size;
     size_t total_size = desc.requested_bytes + desc.prefix_size + desc.suffix_size;
+    if (total_size < desc.requested_bytes) { // Overflow
+        qemu_error_log("<libc_pid=%03u, pid=%03u> calloc: calloc(%zu, %zu) overflow caused failure.",
+                       malloc_pid, getpid(), n_elements, elem_size);
+        errno = ENOMEM;
+        return NULL;
+    }
     size_t total_elements = total_size / elem_size;
     total_size %= elem_size;
     if (total_size != 0) {
@@ -795,22 +816,23 @@
     }
     desc.ptr = Malloc(calloc)(total_elements, elem_size);
     if (desc.ptr == NULL) {
-        error_log("<libc_pid=%03u, pid=%03u> calloc: calloc(%zd(%zd), %zd) (prx=%u, sfx=%u) failed.",
+        error_log("<libc_pid=%03u, pid=%03u> calloc: calloc(%zu(%zu), %zu) (prx=%u, sfx=%u) failed.",
                    malloc_pid, getpid(), n_elements, total_elements, elem_size,
                    desc.prefix_size, desc.suffix_size);
         return NULL;
     }
 
     if (notify_qemu_malloc(&desc)) {
-        log_mdesc(error, &desc, "<libc_pid=%03u, pid=%03u>: calloc(%zd(%zd), %zd): notify_malloc failed for ",
+        log_mdesc(error, &desc, "<libc_pid=%03u, pid=%03u>: calloc(%zu(%zu), %zu): notify_malloc failed for ",
                   malloc_pid, getpid(), n_elements, total_elements, elem_size);
         Malloc(free)(desc.ptr);
+        errno = ENOMEM;
         return NULL;
     } else {
 #if TEST_ACCESS_VIOLATIONS
         test_access_violation(&desc);
 #endif  // TEST_ACCESS_VIOLATIONS
-        log_mdesc(info, &desc, "### <libc_pid=%03u, pid=%03u> calloc(%zd(%zd), %zd) -> ",
+        log_mdesc(info, &desc, "### <libc_pid=%03u, pid=%03u> calloc(%zu(%zu), %zu) -> ",
                   malloc_pid, getpid(), n_elements, total_elements, elem_size);
         return mallocdesc_user_ptr(&desc);
     }
@@ -823,22 +845,17 @@
  * should not expect that pointer returned after shrinking will remain the same.
  */
 extern "C" void* qemu_instrumented_realloc(void* mem, size_t bytes) {
-    MallocDesc new_desc;
-    MallocDesc cur_desc;
-    size_t to_copy;
-    void* ret;
-
     if (mem == NULL) {
         // Nothing to realloc. just do regular malloc.
-        qemu_info_log("::: <libc_pid=%03u, pid=%03u>: realloc(%p, %zd) redir to malloc",
-                 malloc_pid, getpid(), mem, bytes);
+        qemu_info_log("::: <libc_pid=%03u, pid=%03u>: realloc(%p, %zu) redir to malloc",
+                      malloc_pid, getpid(), mem, bytes);
         return qemu_instrumented_malloc(bytes);
     }
 
     if (bytes == 0) {
         // This is a "free" condition.
-        qemu_info_log("::: <libc_pid=%03u, pid=%03u>: realloc(%p, %zd) redir to free and malloc",
-                 malloc_pid, getpid(), mem, bytes);
+        qemu_info_log("::: <libc_pid=%03u, pid=%03u>: realloc(%p, %zu) redir to free and malloc",
+                      malloc_pid, getpid(), mem, bytes);
         qemu_instrumented_free(mem);
 
         // This is what realloc does for a "free" realloc.
@@ -846,10 +863,12 @@
     }
 
     // Query emulator for the reallocating block information.
+    MallocDesc cur_desc;
     if (query_qemu_malloc_info(mem, &cur_desc, 2)) {
         // Note that this violation should be already caught in the emulator.
-        error_log("<libc_pid=%03u, pid=%03u>: realloc(%p, %zd) query_info failed.",
+        error_log("<libc_pid=%03u, pid=%03u>: realloc(%p, %zu) query_info failed.",
                   malloc_pid, getpid(), mem, bytes);
+        errno = ENOMEM;
         return NULL;
     }
 
@@ -861,8 +880,9 @@
      * for this memory block. Note that this violation should be already caught
      * in the emulator.*/
     if (mem != mallocdesc_user_ptr(&cur_desc)) {
-        log_mdesc(error, &cur_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zd) is invalid for ",
+        log_mdesc(error, &cur_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zu) is invalid for ",
                   malloc_pid, getpid(), mem, bytes);
+        errno = ENOMEM;
         return NULL;
     }
 
@@ -872,31 +892,38 @@
      * for this block that is stored in the emulator. */
 
     // Initialize descriptor for the new block.
+    MallocDesc new_desc;
     new_desc.prefix_size = DEFAULT_PREFIX_SIZE;
     new_desc.requested_bytes = bytes;
     new_desc.suffix_size = DEFAULT_SUFFIX_SIZE;
-    new_desc.ptr = Malloc(malloc)(mallocdesc_alloc_size(&new_desc));
-    if (new_desc.ptr == NULL) {
-        log_mdesc(error, &cur_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zd): malloc(%u) failed on ",
-                  malloc_pid, getpid(), mem, bytes,
-                  mallocdesc_alloc_size(&new_desc));
+    size_t new_size = mallocdesc_alloc_size(&new_desc);
+    if (new_size < bytes) { // Overflow
+        qemu_error_log("<libc_pid=%03u, pid=%03u>: realloc(%p, %zu): malloc(%u) failed due to overflow",
+                       malloc_pid, getpid(), mem, bytes, new_size);
+        errno = ENOMEM;
         return NULL;
     }
-    ret = mallocdesc_user_ptr(&new_desc);
+    new_desc.ptr = Malloc(malloc)(new_size);
+    if (new_desc.ptr == NULL) {
+        log_mdesc(error, &cur_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zu): malloc(%u) failed on ",
+                  malloc_pid, getpid(), mem, bytes, new_size);
+        return NULL;
+    }
+    void* new_mem = mallocdesc_user_ptr(&new_desc);
 
     // Copy user data from old block to the new one.
-    to_copy = bytes < cur_desc.requested_bytes ? bytes :
-                                                 cur_desc.requested_bytes;
+    size_t to_copy = bytes < cur_desc.requested_bytes ? bytes : cur_desc.requested_bytes;
     if (to_copy != 0) {
-        memcpy(ret, mallocdesc_user_ptr(&cur_desc), to_copy);
+        memcpy(new_mem, mallocdesc_user_ptr(&cur_desc), to_copy);
     }
 
     // Register new block with emulator.
     if (notify_qemu_malloc(&new_desc)) {
-        log_mdesc(error, &new_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zd) notify_malloc failed -> ",
+        log_mdesc(error, &new_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zu) notify_malloc failed -> ",
                   malloc_pid, getpid(), mem, bytes);
         log_mdesc(error, &cur_desc, "                                                                <- ");
         Malloc(free)(new_desc.ptr);
+        errno = ENOMEM;
         return NULL;
     }
 
@@ -906,21 +933,22 @@
 
     // Free old block.
     if (notify_qemu_free(mem)) {
-        log_mdesc(error, &cur_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zd): notify_free failed for ",
+        log_mdesc(error, &cur_desc, "<libc_pid=%03u, pid=%03u>: realloc(%p, %zu): notify_free failed for ",
                   malloc_pid, getpid(), mem, bytes);
         /* Since we registered new decriptor with the emulator, we need
          * to unregister it before freeing newly allocated block. */
         notify_qemu_free(mallocdesc_user_ptr(&new_desc));
         Malloc(free)(new_desc.ptr);
+        errno = ENOMEM;
         return NULL;
     }
     Malloc(free)(cur_desc.ptr);
 
-    log_mdesc(info, &new_desc, "=== <libc_pid=%03u, pid=%03u>: realloc(%p, %zd) -> ",
+    log_mdesc(info, &new_desc, "=== <libc_pid=%03u, pid=%03u>: realloc(%p, %zu) -> ",
               malloc_pid, getpid(), mem, bytes);
     log_mdesc(info, &cur_desc, "                                               <- ");
 
-    return ret;
+    return new_mem;
 }
 
 /* This routine serves as entry point for 'memalign'.
@@ -931,28 +959,38 @@
 
     if (bytes == 0) {
         // Just let go zero bytes allocation.
-        qemu_info_log("::: <libc_pid=%03u, pid=%03u>: memalign(%zx, %zd) redir to malloc",
+        qemu_info_log("::: <libc_pid=%03u, pid=%03u>: memalign(%zx, %zu) redir to malloc",
                  malloc_pid, getpid(), alignment, bytes);
         return qemu_instrumented_malloc(0);
     }
 
-    /* Prefix size for aligned allocation must be equal to the alignment used
-     * for allocation in order to ensure proper alignment of the returned
-     * pointer, in case that alignment requirement is greater than prefix
-     * size. */
-    desc.prefix_size = alignment > DEFAULT_PREFIX_SIZE ? alignment :
-                                                         DEFAULT_PREFIX_SIZE;
+    // Prefix size for aligned allocation must be equal to the alignment used
+    // for allocation in order to ensure proper alignment of the returned
+    // pointer. in case that alignment requirement is greater than prefix
+    // size.
+    if (alignment < DEFAULT_PREFIX_SIZE) {
+        alignment = DEFAULT_PREFIX_SIZE;
+    } else if (alignment & (alignment - 1)) {
+        alignment = 1L << (31 - __builtin_clz(alignment));
+    }
+    desc.prefix_size = alignment;
     desc.requested_bytes = bytes;
     desc.suffix_size = DEFAULT_SUFFIX_SIZE;
-    desc.ptr = Malloc(memalign)(desc.prefix_size, mallocdesc_alloc_size(&desc));
+    size_t size = mallocdesc_alloc_size(&desc);
+    if (size < bytes) { // Overflow
+        qemu_error_log("<libc_pid=%03u, pid=%03u> memalign(%zx, %zu): malloc(%u) failed due to overflow.",
+                       malloc_pid, getpid(), alignment, bytes, size);
+
+        return NULL;
+    }
+    desc.ptr = Malloc(memalign)(desc.prefix_size, size);
     if (desc.ptr == NULL) {
-        error_log("<libc_pid=%03u, pid=%03u> memalign(%zx, %zd): malloc(%u) failed.",
-                  malloc_pid, getpid(), alignment, bytes,
-                  mallocdesc_alloc_size(&desc));
+        error_log("<libc_pid=%03u, pid=%03u> memalign(%zx, %zu): malloc(%u) failed.",
+                  malloc_pid, getpid(), alignment, bytes, size);
         return NULL;
     }
     if (notify_qemu_malloc(&desc)) {
-        log_mdesc(error, &desc, "<libc_pid=%03u, pid=%03u>: memalign(%zx, %zd): notify_malloc failed for ",
+        log_mdesc(error, &desc, "<libc_pid=%03u, pid=%03u>: memalign(%zx, %zu): notify_malloc failed for ",
                   malloc_pid, getpid(), alignment, bytes);
         Malloc(free)(desc.ptr);
         return NULL;
@@ -962,7 +1000,7 @@
     test_access_violation(&desc);
 #endif  // TEST_ACCESS_VIOLATIONS
 
-    log_mdesc(info, &desc, "@@@ <libc_pid=%03u, pid=%03u> memalign(%zx, %zd) -> ",
+    log_mdesc(info, &desc, "@@@ <libc_pid=%03u, pid=%03u> memalign(%zx, %zu) -> ",
               malloc_pid, getpid(), alignment, bytes);
     return mallocdesc_user_ptr(&desc);
 }
@@ -990,3 +1028,34 @@
     /* during instrumentation, we can't really report anything more than requested_bytes */
     return cur_desc.requested_bytes;
 }
+
+extern "C" struct mallinfo qemu_instrumented_mallinfo() {
+  return Malloc(mallinfo)();
+}
+
+extern "C" int qemu_instrumented_posix_memalign(void** memptr, size_t alignment, size_t size) {
+  if ((alignment & (alignment - 1)) != 0) {
+    qemu_error_log("<libc_pid=%03u, pid=%03u> posix_memalign(%p, %zu, %zu): invalid alignment.",
+                   malloc_pid, getpid(), memptr, alignment, size);
+    return EINVAL;
+  }
+  int saved_errno = errno;
+  *memptr = qemu_instrumented_memalign(alignment, size);
+  errno = saved_errno;
+  return (*memptr != NULL) ? 0 : ENOMEM;
+}
+
+extern "C" void* qemu_instrumented_pvalloc(size_t bytes) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  size_t size = (bytes + pagesize - 1) & ~(pagesize - 1);
+  if (size < bytes) { // Overflow
+    qemu_error_log("<libc_pid=%03u, pid=%03u> pvalloc(%zu): overflow (%zu).",
+                   malloc_pid, getpid(), bytes, size);
+    return NULL;
+  }
+  return qemu_instrumented_memalign(pagesize, size);
+}
+
+extern "C" void* qemu_instrumented_valloc(size_t size) {
+  return qemu_instrumented_memalign(sysconf(_SC_PAGESIZE), size);
+}
diff --git a/libc/dns/include/resolv_netid.h b/libc/dns/include/resolv_netid.h
index 991a0bf..63ecdd8 100644
--- a/libc/dns/include/resolv_netid.h
+++ b/libc/dns/include/resolv_netid.h
@@ -50,20 +50,24 @@
 
 struct addrinfo;
 
-struct hostent *android_gethostbyaddrfornet(const void *, socklen_t, int, unsigned, unsigned);
-struct hostent *android_gethostbyaddrfornet_proxy(const void *, socklen_t, int , unsigned);
-struct hostent *android_gethostbynamefornet(const char *, int, unsigned, unsigned);
+#define __used_in_netd __attribute__((visibility ("default")))
+
+struct hostent *android_gethostbyaddrfornet(const void *, socklen_t, int, unsigned, unsigned) __used_in_netd;
+struct hostent *android_gethostbynamefornet(const char *, int, unsigned, unsigned) __used_in_netd;
 int android_getaddrinfofornet(const char *, const char *, const struct addrinfo *, unsigned,
-		unsigned, struct addrinfo **);
-int android_getnameinfofornet(const struct sockaddr *, socklen_t, char *, size_t, char *, size_t,
-		 int, unsigned, unsigned);
+		unsigned, struct addrinfo **) __used_in_netd;
 
 /* set name servers for a network */
 extern void _resolv_set_nameservers_for_net(unsigned netid,
-    const char** servers, int numservers, const char *domains);
+    const char** servers, int numservers, const char *domains) __used_in_netd;
 
 /* flush the cache associated with a certain network */
-extern void _resolv_flush_cache_for_net(unsigned netid);
+extern void _resolv_flush_cache_for_net(unsigned netid) __used_in_netd;
+
+/* Internal use only. */
+struct hostent *android_gethostbyaddrfornet_proxy(const void *, socklen_t, int , unsigned);
+int android_getnameinfofornet(const struct sockaddr *, socklen_t, char *, size_t, char *, size_t,
+		 int, unsigned, unsigned);
 
 __END_DECLS
 
diff --git a/libc/include/netdb.h b/libc/include/netdb.h
index ead5954..527d5c1 100644
--- a/libc/include/netdb.h
+++ b/libc/include/netdb.h
@@ -196,6 +196,8 @@
 #define	SCOPE_DELIMITER	'%'
 
 __BEGIN_DECLS
+#pragma GCC visibility push(default)
+
 /* BIONIC-BEGIN */
 #define  h_errno   (*__get_h_errno())
 int*  __get_h_errno(void);
@@ -245,6 +247,7 @@
 void setnetgrent(const char *);
 void setservent(int);
 
+#pragma GCC visibility pop
 __END_DECLS
 
 #endif /* !_NETDB_H_ */
diff --git a/libc/include/resolv.h b/libc/include/resolv.h
index 36b93ee..c8899ed 100644
--- a/libc/include/resolv.h
+++ b/libc/include/resolv.h
@@ -37,6 +37,7 @@
 #include <netinet/in.h>
 
 __BEGIN_DECLS
+#pragma GCC visibility push(default)
 
 struct res_state;
 
@@ -52,6 +53,7 @@
 extern int dn_comp(const char*, u_char*, int, u_char**, u_char**);
 extern int dn_expand(const u_char*, const u_char*, const u_char*, char*, int);
 
+#pragma GCC visibility pop
 __END_DECLS
 
 #endif /* _RESOLV_H_ */
diff --git a/libc/upstream-dlmalloc/malloc.c b/libc/upstream-dlmalloc/malloc.c
index 3ef9b61..4362f49 100644
--- a/libc/upstream-dlmalloc/malloc.c
+++ b/libc/upstream-dlmalloc/malloc.c
@@ -5317,12 +5317,19 @@
   return dlmemalign(pagesz, bytes);
 }
 
+/* BEGIN android-changed: added overflow check */
 void* dlpvalloc(size_t bytes) {
   size_t pagesz;
+  size_t size;
   ensure_initialization();
   pagesz = mparams.page_size;
-  return dlmemalign(pagesz, (bytes + pagesz - SIZE_T_ONE) & ~(pagesz - SIZE_T_ONE));
+  size = (bytes + pagesz - SIZE_T_ONE) & ~(pagesz - SIZE_T_ONE);
+  if (size < bytes) {
+    return NULL;
+  }
+  return dlmemalign(pagesz, size);
 }
+/* END android-change */
 
 void** dlindependent_calloc(size_t n_elements, size_t elem_size,
                             void* chunks[]) {
diff --git a/tests/malloc_test.cpp b/tests/malloc_test.cpp
index 12a5ffa..ed98f15 100644
--- a/tests/malloc_test.cpp
+++ b/tests/malloc_test.cpp
@@ -16,18 +16,26 @@
 
 #include <gtest/gtest.h>
 
+#include <limits.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <malloc.h>
+#include <unistd.h>
 
 TEST(malloc, malloc_std) {
   // Simple malloc test.
   void *ptr = malloc(100);
   ASSERT_TRUE(ptr != NULL);
   ASSERT_LE(100U, malloc_usable_size(ptr));
-
   free(ptr);
 }
 
+TEST(malloc, malloc_overflow) {
+  errno = 0;
+  ASSERT_EQ(NULL, malloc(SIZE_MAX));
+  ASSERT_EQ(ENOMEM, errno);
+}
+
 TEST(malloc, calloc_std) {
   // Simple calloc test.
   size_t alloc_len = 100;
@@ -37,24 +45,67 @@
   for (size_t i = 0; i < alloc_len; i++) {
     ASSERT_EQ(0, ptr[i]);
   }
-
   free(ptr);
 }
 
+TEST(malloc, calloc_illegal) {
+  errno = 0;
+  ASSERT_EQ(NULL, calloc(-1, 100));
+  ASSERT_EQ(ENOMEM, errno);
+}
+
+TEST(malloc, calloc_overflow) {
+  errno = 0;
+  ASSERT_EQ(NULL, calloc(1, SIZE_MAX));
+  ASSERT_EQ(ENOMEM, errno);
+  errno = 0;
+  ASSERT_EQ(NULL, calloc(SIZE_MAX, SIZE_MAX));
+  ASSERT_EQ(ENOMEM, errno);
+  errno = 0;
+  ASSERT_EQ(NULL, calloc(2, SIZE_MAX));
+  ASSERT_EQ(ENOMEM, errno);
+  errno = 0;
+  ASSERT_EQ(NULL, calloc(SIZE_MAX, 2));
+  ASSERT_EQ(ENOMEM, errno);
+}
+
 TEST(malloc, memalign_multiple) {
   // Memalign test where the alignment is any value.
   for (size_t i = 0; i <= 12; i++) {
     for (size_t alignment = 1 << i; alignment < (1U << (i+1)); alignment++) {
-      char *ptr = (char*)memalign(alignment, 100);
-      ASSERT_TRUE(ptr != NULL) << alignment;
-      ASSERT_LE(100U, malloc_usable_size(ptr));
-      ASSERT_EQ(0, (intptr_t)ptr % (1 << i));
-
+      char *ptr = reinterpret_cast<char*>(memalign(alignment, 100));
+      ASSERT_TRUE(ptr != NULL) << "Failed at alignment " << alignment;
+      ASSERT_LE(100U, malloc_usable_size(ptr)) << "Failed at alignment " << alignment;
+      ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(ptr) % ((1U << i)))
+          << "Failed at alignment " << alignment;
       free(ptr);
     }
   }
 }
 
+TEST(malloc, memalign_overflow) {
+  ASSERT_EQ(NULL, memalign(4096, SIZE_MAX));
+}
+
+TEST(malloc, memalign_non_power2) {
+  void* ptr;
+  for (size_t align = 0; align <= 256; align++) {
+    ptr = memalign(align, 1024);
+    ASSERT_TRUE(ptr != NULL) << "Failed at align " << align;
+    free(ptr);
+  }
+}
+
+TEST(malloc, posix_memalign_non_power2) {
+  void* ptr;
+  ASSERT_EQ(EINVAL, posix_memalign(&ptr, 17, 1024));
+}
+
+TEST(malloc, posix_memalign_overflow) {
+  void* ptr;
+  ASSERT_NE(0, posix_memalign(&ptr, 16, SIZE_MAX));
+}
+
 TEST(malloc, memalign_realloc) {
   // Memalign and then realloc the pointer a couple of times.
   for (size_t alignment = 1; alignment <= 4096; alignment <<= 1) {
@@ -87,7 +138,6 @@
     for (size_t i = 0; i < 250; i++) {
       ASSERT_EQ(0x67, ptr[i]);
     }
-
     free(ptr);
   }
 }
@@ -105,7 +155,6 @@
   for (size_t i = 0; i < 100; i++) {
     ASSERT_EQ(67, ptr[i]);
   }
-
   free(ptr);
 }
 
@@ -122,7 +171,6 @@
   for (size_t i = 0; i < 100; i++) {
     ASSERT_EQ(67, ptr[i]);
   }
-
   free(ptr);
 }
 
@@ -161,9 +209,9 @@
   for (size_t i = 0; i < 150; i++) {
     ASSERT_EQ(0x23, ptr[i]);
   }
-
   free(ptr);
 }
+
 TEST(malloc, calloc_realloc_larger) {
   // Realloc to a larger size, calloc is used for the original allocation.
   char *ptr = (char *)calloc(1, 100);
@@ -176,7 +224,6 @@
   for (size_t i = 0; i < 100; i++) {
     ASSERT_EQ(0, ptr[i]);
   }
-
   free(ptr);
 }
 
@@ -192,7 +239,6 @@
   for (size_t i = 0; i < 100; i++) {
     ASSERT_EQ(0, ptr[i]);
   }
-
   free(ptr);
 }
 
@@ -230,21 +276,42 @@
   for (size_t i = 0; i < 150; i++) {
     ASSERT_EQ(0, ptr[i]);
   }
-
   free(ptr);
 }
 
-TEST(malloc, posix_memalign_non_power2) {
-  void* ptr;
-
-  ASSERT_EQ(EINVAL, posix_memalign(&ptr, 17, 1024));
+TEST(malloc, realloc_overflow) {
+  errno = 0;
+  ASSERT_EQ(NULL, realloc(NULL, SIZE_MAX));
+  ASSERT_EQ(ENOMEM, errno);
+  void* ptr = malloc(100);
+  ASSERT_TRUE(ptr != NULL);
+  errno = 0;
+  ASSERT_EQ(NULL, realloc(ptr, SIZE_MAX));
+  ASSERT_EQ(ENOMEM, errno);
+  free(ptr);
 }
 
-TEST(malloc, memalign_non_power2) {
-  void* ptr;
-  for (size_t align = 0; align <= 256; align++) {
-    ptr = memalign(align, 1024);
-    ASSERT_TRUE(ptr != NULL) << "Failed at align " << align;
-    free(ptr);
-  }
+TEST(malloc, pvalloc_std) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  void* ptr = pvalloc(100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_TRUE((reinterpret_cast<uintptr_t>(ptr) & (pagesize-1)) == 0);
+  ASSERT_LE(pagesize, malloc_usable_size(ptr));
+  free(ptr);
+}
+
+TEST(malloc, pvalloc_overflow) {
+  ASSERT_EQ(NULL, pvalloc(SIZE_MAX));
+}
+
+TEST(malloc, valloc_std) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  void* ptr = pvalloc(100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_TRUE((reinterpret_cast<uintptr_t>(ptr) & (pagesize-1)) == 0);
+  free(ptr);
+}
+
+TEST(malloc, valloc_overflow) {
+  ASSERT_EQ(NULL, valloc(SIZE_MAX));
 }