test: Add tests for constructors

Make sure constructors are called with the default crt0 and not called
with the minimal crt0.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

test/constructor-skip.c

@@ -0,0 +1,37 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright © 2021 Keith Packard
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define CONSTRUCTOR_RET 1
+#include "constructor.c"

test/constructor.c

@@ -0,0 +1,55 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright © 2021 Keith Packard
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#ifndef CONSTRUCTOR_RET
+#define CONSTRUCTOR_RET 0
+#endif
+
+#define REGULAR_RET (1 - CONSTRUCTOR_RET)
+
+void __attribute__((constructor(101)))
+crt_startup(void)
+{
+	_exit(CONSTRUCTOR_RET);
+}
+
+int main(void)
+{
+	_exit(REGULAR_RET);
+}

test/meson.build

@@ -52,6 +52,13 @@ foreach target : targets
     _libs_hosted = _libs_base
   endif
 
+  have_crt_minimal = is_variable('lib_crt_minimal' + target)
+  if have_crt_minimal
+    _libs_minimal = [get_variable('lib_crt_minimal'+ target)] + _libs_base
+  else
+    _libs_minimal = _libs_base
+  endif
+
   _c_args = value[1] + test_c_args + test_c_warnings
   _link_args = value[1] + test_link_args
 
@@ -157,10 +164,27 @@ foreach target : targets
        should_fail: true
       )
 
+  if have_crt_minimal
+    t1 = 'constructor-skip'
+    if target == ''
+      t1_name = t1
+    else
+      t1_name = join_paths(target, t1)
+    endif
+
+    test(t1 + target,
+	 executable(t1_name, 'constructor-skip.c',
+		    c_args: float_printf_compile_args + _c_args,
+		    link_args:  float_printf_link_args + _link_args,
+		    link_with: _libs_minimal,
+		    include_directories: inc),
+	 env: ['MESON_SOURCE_ROOT=' + meson.source_root()])
+  endif
+
   plain_tests = ['rand', 'regex', 'ungetc', 'fenv',
 		 'math_errhandling', 'malloc', 'tls',
 		 'ffs', 'setjmp', 'atexit', 'on_exit',
-		 'complex-funcs', 'math-funcs',
+		 'complex-funcs', 'math-funcs', 'constructor'
 		]
 
   if newlib_nano_malloc or not tests_disable_full_malloc_stress