fix(build): Install bpftool from the source (#96)

- use compiled bpftool instead of binaries from the tree

.github/actions/build-dependencies/action.yaml

@@ -10,7 +10,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Install Base Packages
+    - name: Install ubuntu packages
       run: |
         export DEBIAN_FRONTEND=noninteractive
         sudo apt-get update
@@ -20,19 +20,66 @@ runs:
         sudo apt-get install -y software-properties-common
         sudo apt-get install -y devscripts ubuntu-dev-tools
       shell: bash
-    - name: Install Recent Pahole
-      run: |
-        ./3rdparty/pahole.sh
-      shell: bash
-    - name: Install Golang
+    - name: Install golang
       run: |
+        rm -rf /usr/local/go
         curl -L -o /tmp/go.tar.xz https://go.dev/dl/go${{ inputs.go-version }}.linux-amd64.tar.gz
         sudo tar -C /usr/local -xzf /tmp/go.tar.xz
         sudo update-alternatives --remove-all go || true
         sudo update-alternatives --remove-all gofmt || true
         sudo update-alternatives --install /usr/bin/go go /usr/local/go/bin/go 1
         sudo update-alternatives --install /usr/bin/gofmt gofmt /usr/local/go/bin/gofmt 1
       shell: bash
+    - name: Install llvm
+      run: |
+        export DEBIAN_FRONTEND=noninteractive
+        cd /tmp
+        wget https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        sudo ./llvm.sh 14
+        sudo apt-get install -y clang-14 clangd-14 clang-tools-14 clang-format-14
+        sudo apt-get install -y llvm-14 llvm-14-runtime llvm-14-tools 
+        sudo update-alternatives --remove-all cc || true
+        sudo update-alternatives --remove-all clang || true
+        sudo update-alternatives --remove-all clang++ || true
+        sudo update-alternatives --remove-all llc || true
+        sudo update-alternatives --remove-all lld || true
+        sudo update-alternatives --remove-all clangd || true
+        sudo update-alternatives --remove-all clang-format || true
+        sudo update-alternatives --remove-all llvm-strip || true
+        sudo update-alternatives --remove-all llvm-config || true
+        sudo update-alternatives --remove-all ld.lld || true
+        sudo update-alternatives --remove-all llvm-ar || true
+        sudo update-alternatives --remove-all llvm-nm || true
+        sudo update-alternatives --remove-all llvm-objcopy || true
+        sudo update-alternatives --remove-all llvm-objdump || true
+        sudo update-alternatives --remove-all llvm-readelf || true
+        sudo update-alternatives --remove-all opt || true
+        sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-14 140 \
+          --slave /usr/bin/clang++ clang++ /usr/bin/clang++-14 \
+          --slave /usr/bin/clangd clangd /usr/bin/clangd-14 \
+          --slave /usr/bin/clang-format clang-format /usr/bin/clang-format-14 \
+          --slave /usr/bin/lld lld /usr/bin/lld-14 \
+          --slave /usr/bin/llc llc /usr/bin/llc-14 \
+          --slave /usr/bin/llvm-strip llvm-strip /usr/bin/llvm-strip-14 \
+          --slave /usr/bin/llvm-config llvm-config /usr/bin/llvm-config-14 \
+          --slave /usr/bin/ld.lld ld.lld /usr/bin/ld.lld-14 \
+          --slave /usr/bin/llvm-ar llvm-ar /usr/bin/llvm-ar-14 \
+          --slave /usr/bin/llvm-nm llvm-nm /usr/bin/llvm-nm-14 \
+          --slave /usr/bin/llvm-objcopy llvm-objcopy /usr/bin/llvm-objcopy-14 \
+          --slave /usr/bin/llvm-objdump llvm-objdump /usr/bin/llvm-objdump-14 \
+          --slave /usr/bin/llvm-readelf llvm-readelf /usr/bin/llvm-readelf-14 \
+          --slave /usr/bin/opt opt /usr/bin/opt-14 \
+          --slave /usr/bin/cc cc /usr/bin/clang-14
+      shell: bash
+    - name: Install pahole
+      run: |
+        ./3rdparty/pahole.sh
+      shell: bash
+    - name: Install bpftool
+      run: |
+        ./3rdparty/bpftool.sh
+      shell: bash
     - name: Install staticchecker
       run: |
         GOROOT=/usr/local/go GOPATH=$HOME/go go install honnef.co/go/tools/cmd/staticcheck@latest

.github/workflows/cron.yml

@@ -22,9 +22,7 @@ jobs:
           gh auth login --with-token <<<'${{ secrets.PAT_RAFAEL }}'
       #
       - name: Install Dependencies
-        run: |
-          apt-get update -y
-          apt-get install -y pahole ubuntu-dev-tools
+        uses: ./.github/actions/build-dependencies
       #
       - name: Check out BTFHub
         uses: actions/checkout@v3

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "3rdparty/dwarves"]
 	path = 3rdparty/dwarves
 	url = https://github.com/acmel/dwarves.git
-[submodule "3rdparty/libbpf"]
-	path = 3rdparty/libbpf
-	url = https://github.com/libbpf/libbpf.git
+[submodule "3rdparty/bpftool"]
+	path = 3rdparty/bpftool
+	url = https://github.com/libbpf/bpftool/

3rdparty/bpftool.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+
+git submodule update --init --recursive 3rdparty/bpftool
+cd ./3rdparty/bpftool
+sudo apt-get -y install build-essential libelf-dev libz-dev libcap-dev binutils-dev pkg-config libelf1
+make -C src clean
+CC=clang make -C src all
+sudo cp ./src/bpftool /usr/sbin/bpftool
+make -C src clean

3rdparty/debian.dwarves/rules

@@ -3,9 +3,9 @@
 include /usr/share/dpkg/default.mk
 
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
-
-# Uncomment this to turn on verbose mode.
-#export DH_VERBOSE=1
+export DH_VERBOSE=1
+export CC = clang
+export CFLAGS = -gdwarf-4
 
 %:
 	@true

3rdparty/pahole.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
-git submodule update --init
+git submodule update --init --recursive 3rdparty/dwarves
 export DEBIAN_FRONTEND=noninteractive
 rm -f *.deb
 cd ./3rdparty/dwarves

tools/btfgen.sh

@@ -42,7 +42,7 @@ fi
 
 cd ${basedir}
 
-btfgen=./tools/bin/bpftool.$(uname -m)
+btfgen=/usr/sbin/bpftool
 if [ ! -x "${btfgen}" ]; then
     echo "error: could not find bpftool (w/ btfgen patch) tool"
     exit 1
@@ -79,4 +79,4 @@ for dir in $(find ./archive/ -iregex ".*${a}.*" -type d | sed 's:\.\/archive\/::
         $btfgen gen min_core_btf ${extracted} ${out_dir}/${extracted} ${obj_cmdline}
         [[ $ret -eq 0 ]] && [[ -f ./${extracted} ]] && rm ./${extracted}
     done
-done
+done