From 1ae10a006e2acd601d14112e6f0f91c030d2cd08 Mon Sep 17 00:00:00 2001
From: Motomu Utsumi <motomuman@google.com>
Date: Thu, 17 Jul 2025 10:45:19 +0900
Subject: [PATCH] NetBpfLoad: less copies

This is a cherry-pick of ag/34620709 to NetBpfLoad

Test: TH
Flag: EXEMPT no-op
Bug: 428792764
Change-Id: Ia5aaa30cab71a2051b6c787824798958f2dee3f5
---
 bpf/loader/NetBpfLoad.cpp | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/bpf/loader/NetBpfLoad.cpp b/bpf/loader/NetBpfLoad.cpp
index 10b0601cb2..130fbc0dec 100644
--- a/bpf/loader/NetBpfLoad.cpp
+++ b/bpf/loader/NetBpfLoad.cpp
@@ -349,15 +349,12 @@ static int readSectionByName(const char* name, ifstream& elfFile, vector<char>&
         if (!secname) continue;
 
         if (!strcmp(secname, name)) {
-            vector<char> dataTmp;
-            dataTmp.resize(shTable[i].sh_size);
-
             elfFile.seekg(shTable[i].sh_offset);
             if (elfFile.fail()) return -1;
 
-            if (!elfFile.read((char*)dataTmp.data(), shTable[i].sh_size)) return -1;
+            data.resize(shTable[i].sh_size);
+            if (!elfFile.read(data.data(), shTable[i].sh_size)) return -1;
 
-            data = dataTmp;
             return 0;
         }
     }
@@ -397,15 +394,12 @@ static int readSectionByType(ifstream& elfFile, int type, vector<char>& data) {
     for (int i = 0; i < (int)shTable.size(); i++) {
         if ((int)shTable[i].sh_type != type) continue;
 
-        vector<char> dataTmp;
-        dataTmp.resize(shTable[i].sh_size);
-
         elfFile.seekg(shTable[i].sh_offset);
         if (elfFile.fail()) return -1;
 
-        if (!elfFile.read((char*)dataTmp.data(), shTable[i].sh_size)) return -1;
+        data.resize(shTable[i].sh_size);
+        if (!elfFile.read(data.data(), shTable[i].sh_size)) return -1;
 
-        data = dataTmp;
         return 0;
     }
     return -2;