Implement malloc_usable_size for debug impls.

- Implemented chk_memalign.
- Fixed a few bugs in leak_memalign.
- Implemented {leak,fill,check,qemu}_malloc_usable_size.
- Make malloc_usable_size update at run time.
- Add malloc_test.cpp as a small set of tests for the
  malloc debug routines.
- Fix the qemu routines since it's been broken since it moved to C++.
- Add support for the %u format to the out_vformat in libc_logging.cpp.
  This is used by the emulator code.

Tested using the bionic-unit-tests with setprop libc.debug.malloc
set to 1, 5, and 10.

I tested as much as possible on the emulator, but tracing doesn't appear
to be working properly.

Bug: 6143477

Merge change from internal master.

(cherry-picked from commit 3d594c258045783fc9e1956ce7a4d91e302f011e)

Change-Id: I4ae00fffba82315a8c283f35893fd554460722fb

1 files changed, 235 insertions, 0 deletions

diff --git a/tests/malloc_test.cpp b/tests/malloc_test.cpp
new file mode 100644
index 000000000..259853dca
--- /dev/null
+++ b/tests/malloc_test.cpp
@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <stdlib.h>
+#include <malloc.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, calloc_std) {
+  // Simple calloc test.
+  size_t alloc_len = 100;
+  char *ptr = (char *)calloc(1, alloc_len);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(alloc_len, malloc_usable_size(ptr));
+  for (size_t i = 0; i < alloc_len; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+
+  free(ptr);
+}
+
+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);
+      ASSERT_LE(100U, malloc_usable_size(ptr));
+      ASSERT_EQ(0, (intptr_t)ptr % (1 << i));
+
+      free(ptr);
+    }
+  }
+}
+
+TEST(malloc, memalign_realloc) {
+  // Memalign and then realloc the pointer a couple of times.
+  for (size_t alignment = 1; alignment <= 4096; alignment <<= 1) {
+    char *ptr = (char*)memalign(alignment, 100);
+    ASSERT_TRUE(ptr != NULL);
+    ASSERT_LE(100U, malloc_usable_size(ptr));
+    ASSERT_EQ(0U, (intptr_t)ptr % alignment);
+    memset(ptr, 0x23, 100);
+
+    ptr = (char*)realloc(ptr, 200);
+    ASSERT_TRUE(ptr != NULL);
+    ASSERT_LE(200U, malloc_usable_size(ptr));
+    ASSERT_TRUE(ptr != NULL);
+    for (size_t i = 0; i < 100; i++) {
+      ASSERT_EQ(0x23, ptr[i]);
+    }
+    memset(ptr, 0x45, 200);
+
+    ptr = (char*)realloc(ptr, 300);
+    ASSERT_TRUE(ptr != NULL);
+    ASSERT_LE(300U, malloc_usable_size(ptr));
+    for (size_t i = 0; i < 200; i++) {
+      ASSERT_EQ(0x45, ptr[i]);
+    }
+    memset(ptr, 0x67, 300);
+
+    ptr = (char*)realloc(ptr, 250);
+    ASSERT_TRUE(ptr != NULL);
+    ASSERT_LE(250U, malloc_usable_size(ptr));
+    for (size_t i = 0; i < 250; i++) {
+      ASSERT_EQ(0x67, ptr[i]);
+    }
+
+    free(ptr);
+  }
+}
+
+TEST(malloc, malloc_realloc_larger) {
+  // Realloc to a larger size, malloc is used for the original allocation.
+  char *ptr = (char *)malloc(100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(100U, malloc_usable_size(ptr));
+  memset(ptr, 67, 100);
+
+  ptr = (char *)realloc(ptr, 200);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(200U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 100; i++) {
+    ASSERT_EQ(67, ptr[i]);
+  }
+
+  free(ptr);
+}
+
+TEST(malloc, malloc_realloc_smaller) {
+  // Realloc to a smaller size, malloc is used for the original allocation.
+  char *ptr = (char *)malloc(200);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(200U, malloc_usable_size(ptr));
+  memset(ptr, 67, 200);
+
+  ptr = (char *)realloc(ptr, 100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(100U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 100; i++) {
+    ASSERT_EQ(67, ptr[i]);
+  }
+
+  free(ptr);
+}
+
+TEST(malloc, malloc_multiple_realloc) {
+  // Multiple reallocs, malloc is used for the original allocation.
+  char *ptr = (char *)malloc(200);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(200U, malloc_usable_size(ptr));
+  memset(ptr, 0x23, 200);
+
+  ptr = (char *)realloc(ptr, 100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(100U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 100; i++) {
+    ASSERT_EQ(0x23, ptr[i]);
+  }
+
+  ptr = (char*)realloc(ptr, 50);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(50U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 50; i++) {
+    ASSERT_EQ(0x23, ptr[i]);
+  }
+
+  ptr = (char*)realloc(ptr, 150);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(150U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 50; i++) {
+    ASSERT_EQ(0x23, ptr[i]);
+  }
+  memset(ptr, 0x23, 150);
+
+  ptr = (char*)realloc(ptr, 425);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(425U, malloc_usable_size(ptr));
+  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);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(100U, malloc_usable_size(ptr));
+
+  ptr = (char *)realloc(ptr, 200);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(200U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 100; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+
+  free(ptr);
+}
+
+TEST(malloc, calloc_realloc_smaller) {
+  // Realloc to a smaller size, calloc is used for the original allocation.
+  char *ptr = (char *)calloc(1, 200);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(200U, malloc_usable_size(ptr));
+
+  ptr = (char *)realloc(ptr, 100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(100U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 100; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+
+  free(ptr);
+}
+
+TEST(malloc, calloc_multiple_realloc) {
+  // Multiple reallocs, calloc is used for the original allocation.
+  char *ptr = (char *)calloc(1, 200);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(200U, malloc_usable_size(ptr));
+
+  ptr = (char *)realloc(ptr, 100);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(100U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 100; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+
+  ptr = (char*)realloc(ptr, 50);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(50U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 50; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+
+  ptr = (char*)realloc(ptr, 150);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(150U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 50; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+  memset(ptr, 0, 150);
+
+  ptr = (char*)realloc(ptr, 425);
+  ASSERT_TRUE(ptr != NULL);
+  ASSERT_LE(425U, malloc_usable_size(ptr));
+  for (size_t i = 0; i < 150; i++) {
+    ASSERT_EQ(0, ptr[i]);
+  }
+
+  free(ptr);
+}