meson: Add veristat script

Add a meson script to run veristat. This can later be used to generate
reports for BPF program complexity at PR time.

Signed-off-by: Daniel Hodges <[email protected]>

meson-scripts/veristat

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+GUEST_TIMEOUT=25
+BUILD_DIR=$1
+SCHED=$2
+KERNEL=$3
+
+if [ "${KERNEL}" == "vmlinuz" ]; then
+  unset KERNEL
+fi
+
+cd $build_dir
+
+if [ -n "${KERNEL}" ] && [ ! -x `which vng` ]; then
+  echo "vng not found, please install virtme-ng to enable testing"
+  exit 1
+fi
+
+if [ -n "${SCHED}" ]; then
+  BPF_PATH=$(find ${BUILD_DIR} -type f -name bpf.bpf.o | grep ${SCHED})
+  echo "Running veristat on ${BPF_PATH}"
+  if [ -n "${KERNEL}" ]; then
+    timeout --preserve-status ${GUEST_TIMEOUT} \
+      vng --force-9p -v -r ${KERNEL} -- \
+        veristat ${BPF_PATH}
+    exit $?
+  else
+    sudo veristat ${BPF_PATH}
+    exit $?
+  fi
+fi
+
+for BPF_PATH in $(find ${BUILD_DIR} -type f -name bpf.bpf.o); do
+  if [ -n "${KERNEL}" ]; then
+    timeout --preserve-status ${GUEST_TIMEOUT} \
+      vng --force-9p -v -r ${KERNEL} -- \
+        veristat ${BPF_PATH}
+    exit $?
+  else
+    sudo veristat ${BPF_PATH}
+    exit $?
+  fi
+done

meson.build

@@ -16,8 +16,13 @@ serialize = get_option('serialize')
 
 bpf_clang = find_program(get_option('bpf_clang'))
 
+run_veristat = find_program(join_paths(meson.current_source_dir(),
+                                        'meson-scripts/veristat'))
+
 enable_stress = get_option('enable_stress')
 
+scheduler = get_option('scheduler')
+
 if enable_rust
   cargo = find_program(get_option('cargo'))
 endif
@@ -323,6 +328,9 @@ endif
 
 run_target('test_sched', command: [test_sched, kernel])
 
+run_target('veristat', command: [run_veristat, meson.current_build_dir(),
+                                 get_option('scheduler'), get_option('kernel')])
+
 if enable_rust
   subdir('rust')
 endif

meson.options

@@ -20,6 +20,8 @@ option('enable_stress', type: 'boolean', value: 'true',
        description: 'Enable stress tests')
 option('kernel', type: 'string', value: 'vmlinuz',
        description: 'kernel image used to test schedulers')
+option('scheduler', type: 'string', value: '',
+       description: 'scheduler to build')
 option('kernel_headers', type: 'string', value: '',
        description: 'kernel headers to build the schedulers')
 option(