Add clang analyzer CI job

.github/workflows/ci.yml

@@ -55,6 +55,26 @@ jobs:
     - name: Distcheck
       run: make distcheck DISTCHECK_CONFIGURE_FLAGS='--enable-werror --enable-openvz --enable-cgroup --enable-vserver --enable-ancient-vserver --enable-taskstats --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct'
 
+  build-ubuntu-latest-clang-analyzer:
+    runs-on: ubuntu-latest
+    env:
+      CC: clang-11
+    steps:
+    - uses: actions/checkout@v2
+    - name: install clang repo
+      run: |
+        wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key 2>/dev/null | sudo apt-key add -
+        sudo add-apt-repository 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main' -y
+        sudo apt-get update -q
+    - name: Install Dependencies
+      run: sudo apt-get install clang-11 clang-tools-11 libncursesw5-dev libhwloc-dev libnl-3-dev libnl-genl-3-dev
+    - name: Bootstrap
+      run: ./autogen.sh
+    - name: Configure
+      run: scan-build-11 -analyze-headers --status-bugs ./configure --enable-debug --enable-werror --enable-openvz --enable-cgroup --enable-vserver --enable-ancient-vserver --enable-taskstats --enable-unicode --enable-hwloc --enable-setuid --enable-delayacct
+    - name: Build
+      run: scan-build-11 -analyze-headers --status-bugs make -j"$(nproc)"
+
   whitespace_check:
     runs-on: ubuntu-latest
     steps:

AffinityPanel.c

@@ -274,9 +274,10 @@ static MaskItem *AffinityPanel_addObject(AffinityPanel* this, hwloc_obj_t obj, u
       }
       xSnprintf(&indent_buf[off], left, "%s",
              obj->next_sibling ? CRT_treeStr[TREE_STR_RTEE] : CRT_treeStr[TREE_STR_BEND]);
-      size_t len = strlen(&indent_buf[off]);
-      off += len;
-      left -= len;
+      // Uncomment when further appending to indent_buf
+      //size_t len = strlen(&indent_buf[off]);
+      //off += len;
+      //left -= len;
    }
 
    xSnprintf(buf, 64, "%s %s%u", type_name, index_prefix, index);

htop.c

@@ -107,6 +107,7 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
             printVersionFlag();
             exit(0);
          case 's':
+            assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
             if (strcmp(optarg, "help") == 0) {
                for (int j = 1; j < Platform_numberOfFields; j++) {
                   const char* name = Process_fields[j].name;
@@ -158,6 +159,7 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
             flags.treeView = true;
             break;
          case 'p': {
+            assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
             char* argCopy = xStrdup(optarg);
             char* saveptr;
             char* pid = strtok_r(argCopy, ",", &saveptr);