From 72d0f9b6e7942e1366f0388c97864df864a82397 Mon Sep 17 00:00:00 2001
From: yidong zhang <yidong.zhang@amlogic.com>
Date: Thu, 24 Jun 2021 17:51:56 +0800
Subject: [PATCH] Avoid using thread cache in unwinder.

Using  thread cache will cause SIGSEGV for 32bit+kernel4.9 device.

Bug: 190579082
Bug: 189803009

Test: run cts -m CtsSeccompHostTestCases
Change-Id: I47b13d02674aadbacd8dac36d8382eed0885413c
Merged-In: I47b13d02674aadbacd8dac36d8382eed0885413c
Signed-off-by: yidong zhang <yidong.zhang@amlogic.com>
(cherry picked from commit cbf7c466e65eba2b285b28292a5e4934b6655c8a)
---
 debuggerd/libdebuggerd/tombstone.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index ad903cee4..9c01f15eb 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -593,6 +593,9 @@ void engrave_tombstone_ucontext(int tombstone_fd, int proto_fd, uint64_t abort_m
   };
 
   unwindstack::UnwinderFromPid unwinder(kMaxFrames, pid, unwindstack::Regs::CurrentArch());
+  auto process_memory =
+      unwindstack::Memory::CreateProcessMemoryCached(getpid());
+  unwinder.SetProcessMemory(process_memory);
   if (!unwinder.Init()) {
     async_safe_fatal("failed to init unwinder object");
   }