Add tests for cgroup process management

test/src/apps/scripts/cgroup.sh

@@ -0,0 +1,97 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: MPL-2.0
+
+set -e
+
+CGROUP_ROOT="/sys/fs/cgroup"
+CGROUP_NAME="user"
+PROCESS_ID=1
+
+log_step() {
+    echo -e "\n==> $1"
+}
+
+verify() {
+    local description=$1
+    local command=$2
+    local expected=$3
+    
+    log_step "Verify: $description"
+    echo "Run: $command"
+    local result=$(eval "$command")
+    echo "Got: $result"
+    echo "Expected: $expected"
+    
+    if [ "$result" != "$expected" ]; then
+        echo -e "Error: Verification failed!"
+        exit 1
+    else
+        echo -e "Verified"
+    fi
+}
+
+cleanup() {
+    log_step "Cleaning up"
+    
+    if [ -f "$CGROUP_ROOT/cgroup.procs" ]; then
+        echo "Moving process $PROCESS_ID back to root cgroup"
+        echo $PROCESS_ID > "$CGROUP_ROOT/cgroup.procs" 2>/dev/null || true
+    fi
+    
+    if [ -d "$CGROUP_ROOT/$CGROUP_NAME" ]; then
+        echo "Removing test cgroup: $CGROUP_ROOT/$CGROUP_NAME"
+        rmdir "$CGROUP_ROOT/$CGROUP_NAME" 2>/dev/null || true
+    fi
+    
+    echo "Cleanup complete"
+}
+
+trap cleanup EXIT
+
+log_step "1. Change to cgroup root directory"
+cd "$CGROUP_ROOT"
+echo "Current directory: $(pwd)"
+
+log_step "2. Create user hierarchy"
+mkdir -p "$CGROUP_NAME"
+verify "user hierarchy exists" "ls -d $CGROUP_NAME" "$CGROUP_NAME"
+
+log_step "3. Enter user directory"
+cd "$CGROUP_NAME"
+echo "Current directory: $(pwd)"
+
+log_step "4. Check initial cgroup of process 1"
+verify "Process 1 initially in root cgroup" "grep -a '0::' /proc/$PROCESS_ID/cgroup" "0::/"
+
+log_step "4a. Check initial populated status"
+verify "Initial cgroup.events populated=0" "grep '^populated' cgroup.events" "populated 0"
+
+log_step "5. Bind process 1 to user hierarchy"
+echo $PROCESS_ID > cgroup.procs
+verify "Process 1 added to user hierarchy" "cat cgroup.procs | grep -w $PROCESS_ID" "$PROCESS_ID"
+
+log_step "5a. Check populated status after binding"
+verify "cgroup.events populated=1 after binding" "grep '^populated' cgroup.events" "populated 1"
+
+log_step "6. Check process 1 cgroup again"
+verify "Process 1 now in user hierarchy" "grep -a '0::' /proc/$PROCESS_ID/cgroup" "0::/$CGROUP_NAME"
+
+log_step "7. Return to parent directory"
+cd ..
+echo "Current directory: $(pwd)"
+
+log_step "8. Check parent cgroup.procs contents"
+echo "cgroup.procs contents:"
+cat cgroup.procs
+verify "cgroup.procs now does not contain process 1" "cat cgroup.procs | grep -w $PROCESS_ID" ""
+
+log_step "9. Move process 1 back to root cgroup"
+echo $PROCESS_ID > cgroup.procs
+verify "Process 1 back in root cgroup" "grep -a '0::' /proc/$PROCESS_ID/cgroup" "0::/"
+
+log_step "10. Remove user hierarchy"
+rmdir "$CGROUP_NAME"
+verify "user hierarchy removed" "ls -d $CGROUP_NAME 2>&1" "ls: $CGROUP_NAME: No such file or directory"
+
+echo -e "\nAll test steps completed successfully!"

test/src/apps/scripts/run_general_test.sh

@@ -9,6 +9,7 @@ cd ${SCRIPT_DIR}
 
 ./shell_cmd.sh
 ./test_epoll_pwait.sh
+./cgroup.sh
 
 # TODO: Support the following tests with SMP
 if [ -z $BLOCK_UNSUPPORTED_SMP_TESTS ]; then