Merge "Avoid thread cache in unwinder."

debuggerd/handler/debuggerd_fallback.cpp

@@ -87,6 +87,12 @@ static void debuggerd_fallback_trace(int output_fd, ucontext_t* ucontext) {
 
     // TODO: Create this once and store it in a global?
     unwindstack::UnwinderFromPid unwinder(kMaxFrames, getpid());
+    // Do not use the thread cache here because it will call pthread_key_create
+    // which doesn't work in linker code. See b/189803009.
+    // Use a normal cached object because the process is stopped, and there
+    // is no chance of data changing between reads.
+    auto process_memory = unwindstack::Memory::CreateProcessMemoryCached(getpid());
+    unwinder.SetProcessMemory(process_memory);
     dump_backtrace_thread(output_fd, &unwinder, thread);
   }
   __linker_disable_fallback_allocator();