1 files changed, 93 insertions, 0 deletions
diff --git a/libc/platform/bionic/malloc.h b/libc/platform/bionic/malloc.h
new file mode 100644
index 000000000..9c602eadf
--- /dev/null
+++ b/libc/platform/bionic/malloc.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+// Structures for android_mallopt.
+
+typedef struct {
+  // Pointer to the buffer allocated by a call to M_GET_MALLOC_LEAK_INFO.
+  uint8_t* buffer;
+  // The size of the "info" buffer.
+  size_t overall_size;
+  // The size of a single entry.
+  size_t info_size;
+  // The sum of all allocations that have been tracked. Does not include
+  // any heap overhead.
+  size_t total_memory;
+  // The maximum number of backtrace entries.
+  size_t backtrace_size;
+} android_mallopt_leak_info_t;
+
+// Opcodes for android_mallopt.
+
+enum {
+  // Marks the calling process as a profileable zygote child, possibly
+  // initializing profiling infrastructure.
+  M_INIT_ZYGOTE_CHILD_PROFILING = 1,
+#define M_INIT_ZYGOTE_CHILD_PROFILING M_INIT_ZYGOTE_CHILD_PROFILING
+  M_RESET_HOOKS = 2,
+#define M_RESET_HOOKS M_RESET_HOOKS
+  // Set an upper bound on the total size in bytes of all allocations made
+  // using the memory allocation APIs.
+  //   arg = size_t*
+  //   arg_size = sizeof(size_t)
+  M_SET_ALLOCATION_LIMIT_BYTES = 3,
+#define M_SET_ALLOCATION_LIMIT_BYTES M_SET_ALLOCATION_LIMIT_BYTES
+  // Called after the zygote forks to indicate this is a child.
+  M_SET_ZYGOTE_CHILD = 4,
+#define M_SET_ZYGOTE_CHILD M_SET_ZYGOTE_CHILD
+
+  // Options to dump backtraces of allocations. These options only
+  // work when malloc debug has been enabled.
+
+  // Writes the backtrace information of all current allocations to a file.
+  // NOTE: arg_size has to be sizeof(FILE*) because FILE is an opaque type.
+  //   arg = FILE*
+  //   arg_size = sizeof(FILE*)
+  M_WRITE_MALLOC_LEAK_INFO_TO_FILE = 5,
+#define M_WRITE_MALLOC_LEAK_INFO_TO_FILE M_WRITE_MALLOC_LEAK_INFO_TO_FILE
+  // Get information about the backtraces of all
+  //   arg = android_mallopt_leak_info_t*
+  //   arg_size = sizeof(android_mallopt_leak_info_t)
+  M_GET_MALLOC_LEAK_INFO = 6,
+#define M_GET_MALLOC_LEAK_INFO M_GET_MALLOC_LEAK_INFO
+  // Free the memory allocated and returned by M_GET_MALLOC_LEAK_INFO.
+  //   arg = android_mallopt_leak_info_t*
+  //   arg_size = sizeof(android_mallopt_leak_info_t)
+  M_FREE_MALLOC_LEAK_INFO = 7,
+#define M_FREE_MALLOC_LEAK_INFO M_FREE_MALLOC_LEAK_INFO
+};
+
+// Manipulates bionic-specific handling of memory allocation APIs such as
+// malloc. Only for use by the Android platform itself.
+//
+// On success, returns true. On failure, returns false and sets errno.
+extern "C" bool android_mallopt(int opcode, void* arg, size_t arg_size);