feat: add lab-rv32i-c-smalloc-sbrk-libc card

tests/test_host.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+if [[ "${1:-}" != "--already-built" ]]; then
+  make -C "$root" PROFILE=observe host >/dev/null
+fi
+
+check_output() {
+  local program="$1" expected="$2" actual
+  actual="$($program)"
+  if [[ "$actual" != "$expected" ]]; then
+    printf 'FAIL %s\nexpected: %s\nactual:   %s\n' \
+      "$program" "$expected" "$actual" >&2
+    return 1
+  fi
+  printf 'PASS %s: %s\n' "$(basename -- "$(dirname -- "$program")")" "$actual"
+}
+
+check_output "$root/host-build/task01_libc_without_heap/prog" \
+  'length=16 pass=1'
+check_output "$root/host-build/task03_bounded_sbrk/prog" \
+  'grow=40 rejected_grow=40 shrink=32 rejected_shrink=32 preserved=1 bounds=1 pass=1'
+check_output "$root/host-build/task04_smalloc/prog" \
+  'header=16 first=32 second=48 delta=32 aligned=1 metadata=1 append=1 reset=1 pass=1'
+check_output "$root/host-build/task05_picolibc_malloc/prog" \
+  'nonnull=1 delta_nonzero=1 checksum=4612 nonoverlap=1 aligned=1 freed=1 pass=1'
+