From c91e6f9e5fcc9e4965ddd0d3b178edb0287cd930 Mon Sep 17 00:00:00 2001
From: Yi Kong <yikong@google.com>
Date: Mon, 17 Dec 2018 12:51:36 -0800
Subject: [PATCH] [libbacktrace] Fix sign-compare warning

static_cast GetThreadId result to pid_t.

Test: m checkbuild
Change-Id: Id3f541c1cb6cad9471e0cedf2ca49ce0fc38df38
---
 libbacktrace/BacktraceCurrent.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libbacktrace/BacktraceCurrent.cpp b/libbacktrace/BacktraceCurrent.cpp
index 39cb995c5..038b59e15 100644
--- a/libbacktrace/BacktraceCurrent.cpp
+++ b/libbacktrace/BacktraceCurrent.cpp
@@ -76,7 +76,7 @@ bool BacktraceCurrent::Unwind(size_t num_ignore_frames, void* ucontext) {
     return UnwindFromContext(num_ignore_frames, ucontext);
   }
 
-  if (Tid() != android::base::GetThreadId()) {
+  if (Tid() != static_cast<pid_t>(android::base::GetThreadId())) {
     return UnwindThread(num_ignore_frames);
   }