Plumb scudo_stack_depot_size to debuggerd_process_info

This is a no-op but will be used in upcoming scudo changes that allow to
change the depot size at process startup time, and as such we will no
longer be able to call __scudo_get_stack_depot_size in debuggerd.

We already did the equivalent change for the ring buffer size in
https://r.android.com/q/topic:%22scudo_ring_buffer_size%22

Bug: 309446692
Change-Id: Icdcf4cd0a3a486d1ea07a8c616cae776730e1047

libc/bionic/malloc_common_dynamic.cpp

@@ -372,6 +372,7 @@ extern "C" const char* __scudo_get_stack_depot_addr();
 extern "C" const char* __scudo_get_region_info_addr();
 extern "C" const char* __scudo_get_ring_buffer_addr();
 extern "C" size_t __scudo_get_ring_buffer_size();
+extern "C" size_t __scudo_get_stack_depot_size();
 
 // Initializes memory allocation framework once per process.
 static void MallocInitImpl(libc_globals* globals) {
@@ -385,6 +386,7 @@ static void MallocInitImpl(libc_globals* globals) {
   __libc_shared_globals()->scudo_region_info = __scudo_get_region_info_addr();
   __libc_shared_globals()->scudo_ring_buffer = __scudo_get_ring_buffer_addr();
   __libc_shared_globals()->scudo_ring_buffer_size = __scudo_get_ring_buffer_size();
+  __libc_shared_globals()->scudo_stack_depot_size = __scudo_get_stack_depot_size();
 #endif
 
   // Prefer malloc debug since it existed first and is a more complete

libc/private/bionic_globals.h

@@ -130,6 +130,7 @@ struct libc_shared_globals {
   const char* scudo_region_info = nullptr;
   const char* scudo_ring_buffer = nullptr;
   size_t scudo_ring_buffer_size = 0;
+  size_t scudo_stack_depot_size = 0;
 
   HeapTaggingLevel initial_heap_tagging_level = M_HEAP_TAGGING_LEVEL_NONE;
   bool initial_memtag_stack = false;

linker/linker_debuggerd_android.cpp

@@ -44,6 +44,7 @@ static debugger_process_info get_process_info() {
       .scudo_region_info = __libc_shared_globals()->scudo_region_info,
       .scudo_ring_buffer = __libc_shared_globals()->scudo_ring_buffer,
       .scudo_ring_buffer_size = __libc_shared_globals()->scudo_ring_buffer_size,
+      .scudo_stack_depot_size = __libc_shared_globals()->scudo_stack_depot_size,
   };
 }