From 2ba0277b52d352966046cb7b0c5c047cd8a7cdd4 Mon Sep 17 00:00:00 2001
From: analysisjp <akirachanjp@gmail.com>
Date: Sat, 10 Feb 2024 10:09:19 +0900
Subject: fix: prepare_tcmalloc (Fixed memory leak issue in Ubuntu 22.04 or
 modern linux environment)

---
 webui.sh | 54 ++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 36 insertions(+), 18 deletions(-)

diff --git a/webui.sh b/webui.sh
index 25b94906..794cfb8a 100755
--- a/webui.sh
+++ b/webui.sh
@@ -226,30 +226,48 @@ fi
 # Try using TCMalloc on Linux
 prepare_tcmalloc() {
     if [[ "${OSTYPE}" == "linux"* ]] && [[ -z "${NO_TCMALLOC}" ]] && [[ -z "${LD_PRELOAD}" ]]; then
+        # check glibc version
+        LIBC_LIB="$(PATH=/usr/sbin:$PATH ldconfig -p | grep -P "libc.so.6" | head -n 1)"
+        LIBC_INFO=$(echo ${LIBC_LIB} | awk '{print $NF}')
+        LIBC_VER=$(echo $(${LIBC_INFO} | awk 'NR==1 {print $NF}') | grep -oP '\d+\.\d+')
+        echo "glibc version is $LIBC_VER"
+        libc_vernum=$(expr $LIBC_VER)
+        # Since 2.34 libpthread is integrated into libc.so
+        libc_v234=2.34
         # Define Tcmalloc Libs arrays
         TCMALLOC_LIBS=("libtcmalloc(_minimal|)\.so\.\d" "libtcmalloc\.so\.\d")
-
         # Traversal array
         for lib in "${TCMALLOC_LIBS[@]}"
         do
-          #Determine which type of tcmalloc library the library supports
-          TCMALLOC="$(PATH=/usr/sbin:$PATH ldconfig -p | grep -P $lib | head -n 1)"
-          TC_INFO=(${TCMALLOC//=>/})
-          if [[ ! -z "${TC_INFO}" ]]; then
-              echo "Using TCMalloc: ${TC_INFO}"
-              #Determine if the library is linked to libptthread and resolve undefined symbol: ptthread_Key_Create
-              if ldd ${TC_INFO[2]} | grep -q 'libpthread'; then
-                echo "$TC_INFO is linked with libpthread,execute LD_PRELOAD=${TC_INFO}"
-                export LD_PRELOAD="${TC_INFO}"
-                break
-              else
-                echo "$TC_INFO is not linked with libpthreadand will trigger undefined symbol: ptthread_Key_Create error"
-              fi
-          else
-              printf "\e[1m\e[31mCannot locate TCMalloc (improves CPU memory usage)\e[0m\n"
-          fi
+            # Determine which type of tcmalloc library the library supports
+            TCMALLOC="$(PATH=/usr/sbin:$PATH ldconfig -p | grep -P $lib | head -n 1)"
+            TC_INFO=(${TCMALLOC//=>/})
+            if [[ ! -z "${TC_INFO}" ]]; then
+                echo "Check TCMalloc: ${TC_INFO}"
+                # Determine if the library is linked to libptthread and resolve undefined symbol: ptthread_key_create
+                if [ $(echo "$libc_vernum < $libc_v234" | bc) -eq 1 ]; then
+                    # glibc < 2.33 pthread_key_create into libpthead.so. check linking libpthread.so...
+                    if ldd ${TC_INFO[2]} | grep -q 'libpthread'; then
+                        echo "$TC_INFO is linked with libpthread,execute LD_PRELOAD=${TC_INFO[2]}"
+                        # set fullpath LD_PRELOAD (To be on the safe side)
+                        export LD_PRELOAD="${TC_INFO[2]}"
+                        break
+                    else
+                        echo "$TC_INFO is not linked with libpthread will trigger undefined symbol: pthread_Key_create error"
+                    fi
+                else
+                    # Version 2.34 of libc.so (glibc) includes the pthead library IN GLIBC. (USE ubuntu 22.04 and modern linux system and WSL)
+                    # libc.so(glibc) is linked with a library that works in ALMOST ALL Linux userlands. SO NO CHECK!
+                    echo "$TC_INFO is linked with libc.so,execute LD_PRELOAD=${TC_INFO[2]}"
+                    # set fullpath LD_PRELOAD (To be on the safe side)
+                    export LD_PRELOAD="${TC_INFO[2]}"
+                    break
+                fi
+            fi
         done
-
+        if [[ -z "${LD_PRELOAD}" ]]; then
+            printf "\e[1m\e[31mCannot locate TCMalloc. Do you have tcmalloc or gperftools installed on your system? (improves CPU memory usage)\e[0m\n"
+        fi
     fi
 }
 
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