ANDROID: vendor_hooks: Add hook in mmap_region()

Add hook in mmap_region() to record the vma and address information
of monitored processes.

Bug: 198385827
Change-Id: I0bde29113b47ca7f4a9f5d42a54188e791ca3b7e
Signed-off-by: Jiewen Wang <jiewen.wang@vivo.com>
(cherry picked from commit 73c9d4a9d575107b90a6d9f415fa56f963264d06)

drivers/android/vendor_hooks.c

@@ -552,3 +552,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_anonymous_page);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_uprobes_replace_page);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_swap_writepage);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_shrink_node_memcgs);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mmap_region);

include/trace/hooks/mm.h

@@ -516,6 +516,9 @@ DECLARE_HOOK(android_vh_shmem_swapin_folio,
 DECLARE_HOOK(android_vh_swap_writepage,
 	TP_PROTO(unsigned long *sis_flags, struct page *page),
 	TP_ARGS(sis_flags, page));
+DECLARE_HOOK(android_vh_mmap_region,
+	TP_PROTO(struct vm_area_struct *vma, unsigned long addr),
+	TP_ARGS(vma, addr));
 #endif /* _TRACE_HOOK_MM_H */
 
 /* This part must be outside protection */

mm/mmap.c

@@ -57,6 +57,8 @@
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/mmap.h>
+#undef CREATE_TRACE_POINTS
+#include <trace/hooks/mm.h>
 
 #include "internal.h"
 
@@ -1580,6 +1582,8 @@ expanded:
 
 	vma_set_page_prot(vma);
 
+	trace_android_vh_mmap_region(vma, addr);
+
 	return addr;
 
 unmap_and_free_file_vma: