Refactor the malloc_info code.

malloc_info needs to be per native allocator, but the code treated it
like a global function that doesn't depend on the native memory allocator.

Update malloc debug to dump the actual pointers that it has been tracking.

Test: bionic-unit-tests pass.
Test: malloc debug tests pass.
Test: malloc hook tests pass.
Change-Id: I3b0d4d748489dd84c16d16933479dc8b8d79013e
Merged-In: I3b0d4d748489dd84c16d16933479dc8b8d79013e
(cherry picked from commit a3656a98b10d2a4a6194a5d9705ad9c2cc5877b0)
diff --git a/libc/private/bionic_malloc_dispatch.h b/libc/private/bionic_malloc_dispatch.h
index 0dce03d..aea3a1c 100644
--- a/libc/private/bionic_malloc_dispatch.h
+++ b/libc/private/bionic_malloc_dispatch.h
@@ -31,6 +31,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <private/bionic_config.h>
 
 // Entry in malloc dispatch table.
@@ -38,6 +39,7 @@
 typedef void (*MallocFree)(void*);
 typedef struct mallinfo (*MallocMallinfo)();
 typedef void* (*MallocMalloc)(size_t);
+typedef int (*MallocMallocInfo)(int, FILE*);
 typedef size_t (*MallocMallocUsableSize)(const void*);
 typedef void* (*MallocMemalign)(size_t, size_t);
 typedef int (*MallocPosixMemalign)(void**, size_t, size_t);
@@ -73,6 +75,7 @@
   MallocMallocEnable malloc_enable;
   MallocMallopt mallopt;
   MallocAlignedAlloc aligned_alloc;
+  MallocMallocInfo malloc_info;
 } __attribute__((aligned(32)));
 
 #endif