From a4ef25616775be3375e5f82e79d214bb95a4df60 Mon Sep 17 00:00:00 2001
From: Alexey Lang <alexeylang@fb.com>
Date: Tue, 2 Oct 2018 05:43:14 -0700
Subject: [PATCH] Bump up the buffer size and show a warning if the trace might
 be truncated

Summary: The current buffer size isn't enough even to capture a short TTI trace.

Reviewed By: mhorowitz

Differential Revision: D10112538

fbshipit-source-id: 266fa6ffa916049245b21d7725a364d75589c776
---
 React/CxxBridge/RCTCxxBridge.mm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/React/CxxBridge/RCTCxxBridge.mm b/React/CxxBridge/RCTCxxBridge.mm
index 62b13fa9110..2241f9830a3 100644
--- a/React/CxxBridge/RCTCxxBridge.mm
+++ b/React/CxxBridge/RCTCxxBridge.mm
@@ -1258,6 +1258,10 @@ RCT_NOT_IMPLEMENTED(- (instancetype)initWithBundleURL:(__unused NSURL *)bundleUR
       NSData *logData = [log dataUsingEncoding:NSUTF8StringEncoding];
       callback(logData);
       #if WITH_FBSYSTRACE
+      if (![RCTFBSystrace verifyTraceSize:logData.length]) {
+        RCTLogWarn(@"Your FBSystrace trace might be truncated, try to bump up the buffer size"
+                   " in RCTFBSystrace.m or capture a shorter trace");
+      }
       [RCTFBSystrace unregisterCallbacks];
       #endif
     });