build: wire new src dirs, crt objects, and make check into Autotools

tests/startup_modes.sh

@@ -0,0 +1,95 @@
+#!/bin/sh
+# vlibc — make check mode matrix (todo 6).
+#
+# Runs every scenario that a single "run the binary once" TESTS entry cannot
+# cover: the -f failure modes of the four syscall/errno/setjmp/headers tests
+# and the full test_startup mode matrix. Every scenario pins its exact exit
+# status and (where load-bearing) its exact stdout; see tests/test_startup.c
+# and the individual tests for the mode contracts.
+#
+# The binaries are the static vlibc executables built by make check next to
+# the top-level Makefile. make check executes this script with the build
+# directory root as the working directory (in-tree and VPATH builds alike),
+# so the binaries resolve as plain ./<name> paths relative to the CWD, NOT
+# relative to this script's location.
+
+fail=0
+
+# run_rc <binary> <want_rc> <description> [args...]
+# Runs the binary with the given args and checks the exit status only (the
+# -f modes print diagnostics, whose text is not part of the contract).
+run_rc()
+{
+    bin=$1
+    want_rc=$2
+    desc=$3
+    shift 3
+    "$bin" "$@" >/dev/null 2>&1
+    rc=$?
+    if [ "$rc" -ne "$want_rc" ]; then
+        echo "FAIL: $desc: rc=$rc want=$want_rc"
+        fail=1
+    else
+        echo "ok: $desc"
+    fi
+}
+
+# run <binary> <want_rc> <want_stdout> <description> [args...]
+# Like run_rc but also compares the exact stdout (stderr discarded). An
+# empty want_stdout matches an empty stdout.
+run()
+{
+    bin=$1
+    want_rc=$2
+    want_out=$3
+    desc=$4
+    shift 4
+    out=$("$bin" "$@" 2>/dev/null)
+    rc=$?
+    if [ "$rc" -ne "$want_rc" ]; then
+        echo "FAIL: $desc: rc=$rc want=$want_rc"
+        fail=1
+    elif [ "$out" != "$want_out" ]; then
+        echo "FAIL: $desc: stdout [$out] want [$want_out]"
+        fail=1
+    else
+        echo "ok: $desc"
+    fi
+}
+
+bindir=.
+
+# -f failure scenarios of the four arg-mode tests (exit status is the
+# contract; the diagnostics on stdout are not pinned).
+run_rc "./test_syscall" 0 "syscall -f: ENOENT via fake TCB slot" -f
+run_rc "./test_strerror" 0 "strerror -f: unknown errno formats" -f
+run_rc "./test_setjmp" 0 "setjmp -f: longjmp(env,0) coerced to 1" -f
+run_rc "./test_headers" 132 "headers -f: assert(0) traps (SIGILL)" -f
+
+# test_startup mode matrix (each mode pins its own exit status; the default
+# mode exits 42 on success, which is why it is not a bare TESTS entry).
+run "./test_startup" 42 "C
+B
+A" "startup default: atexit LIFO CBA, status 42"
+run "./test_startup" 5 "Q" "startup -q: quick_exit runs only at_quick_exit" -q
+run "./test_startup" 7 "" "startup -z: _exit runs no handlers" -z
+run "./test_startup" 0 "" "startup -t: main-thread TLS + errno TCB slot" -t
+run "./test_startup" 0 "" "startup -x: handler-list limits" -x
+
+# -e needs VLIBC_TEST_VAR=hello in environ (checked by the test itself).
+out=$(VLIBC_TEST_VAR=hello "./test_startup" -e extraarg 2>/dev/null)
+rc=$?
+if [ "$rc" -ne 0 ]; then
+    echo "FAIL: startup -e: argv/env plumbing rc=$rc want=0"
+    fail=1
+elif [ "$out" != "argc=3
+argv0=./test_startup
+argv1=-e
+argv2=extraarg" ]; then
+    echo "FAIL: startup -e: unexpected stdout [$out]"
+    fail=1
+else
+    echo "ok: startup -e: argv/env plumbing"
+fi
+
+exit $fail