chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/tests/compiler_features_tests/builtin_swap_check.c

@@ -0,0 +1,22 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+// Builtin swap was added in GCC 4.8 https://gcc.gnu.org/gcc-4.8/changes.html.
+// Recent versions of Clang pretend to be 4.2 but they do support the builtin
+// swap functions.
+
+#include <stdint.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+    uint16_t test16 = 0;
+    test16 = __builtin_bswap16(test16);
+
+    uint32_t test32 = 0;
+    test32 = __builtin_bswap32(test32);
+
+    uint64_t test64 = 0;
+    test64 = __builtin_bswap64(test64);
+
+    return EXIT_SUCCESS;
+}

vendor/aws-lc-sys/aws-lc/tests/compiler_features_tests/c11.c

@@ -0,0 +1,24 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+// Simple program that should also be able to compiler, udeful to test different
+// compiler flags
+
+#include <stdlib.h>
+#include <stdatomic.h>
+
+// Some platforms define ATOMIC_LONG_LOCK_FREE as an expression like:
+//  (__atomic_always_lock_free (sizeof (atomic_long), (void *) 0) ? 2 :
+//     (__atomic_is_lock_free (sizeof (atomic_long), (void *) 0) ? 1 : 0))
+// which relies on __atomic_is_lock_free which is a runtime function and not a
+// compile time constant. This means ATOMIC_LONG_LOCK_FREE can not be used in a
+// preprocessor check which AWS-LC needs to do to swap implementations of
+// CRYPTO_refcount_inc at compile time. If that is the case the following #if
+// won't compile, the following message is helpful to debug any future issues.
+#if ATOMIC_LONG_LOCK_FREE < 0
+#error "Should not get here, the above line should be false or invalid"
+#endif
+
+int main(int argc, char **argv) {
+    return EXIT_SUCCESS;
+}

vendor/aws-lc-sys/aws-lc/tests/compiler_features_tests/linux_random_h.c

@@ -0,0 +1,20 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+// This file checks if <linux/random.h> can be included. Currently, we assume
+// that the compiler error is caused by '__u32' not being defined.
+// Theory:
+// crypto/fipsmodule/rand/urandom.c includes the <linux/random.h> Linux header.
+// Some old Linux OS does not define '__u32' causing the following error:
+// /usr/include/linux/random.h:38:2: error: unknown type name '__u32'
+// __u32 buf[0];
+// ^
+#if defined(DEFINE_U32)
+typedef unsigned int __u32;
+#endif
+#include <linux/random.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+    return EXIT_SUCCESS;
+}

vendor/aws-lc-sys/aws-lc/tests/compiler_features_tests/memcmp_invalid_stripped_check.c

@@ -0,0 +1,16 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char **argv) {
+  // A bug of 'memcmp' is reported in gcc (9.2, 9.3, 10.1). See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95189
+  // AWS-LC warns the build when detecting the unexpected 'memcmp' behavior.
+  // Below test case is equivalent to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95189#c7
+  char a[] = "\0abc";
+  int res = memcmp(a, "\0\0\0\0", 4);
+  printf("memcmp result %d\n", res);
+  // If the 'memcmp' bug exists, below will return 1.
+  return (res == 0);
+}

vendor/aws-lc-sys/aws-lc/tests/compiler_features_tests/neon_sha3_check.c

@@ -0,0 +1,12 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+// Test for NEON SHA3 extension support in the assembler
+// Requires -march=armv8.4-a+sha3 compiler flag
+int main(void) {
+    __asm__("eor3 v0.16b, v1.16b, v2.16b, v3.16b");
+    __asm__("bcax v0.16b, v1.16b, v2.16b, v3.16b");
+    __asm__("rax1 v0.2d,  v1.2d,  v2.2d         ");
+    __asm__("xar  v0.2d,  v1.2d,  v2.2d,  #0x2a ");
+    return 0;
+}

vendor/aws-lc-sys/aws-lc/tests/compiler_features_tests/stdalign_check.c

@@ -0,0 +1,24 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+// Old versions of GCC don't support __has_include which could be used to check
+// for stdalign.h, try to compile this instead.
+
+#include <stdalign.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+    alignas(8) uint8_t test[16];
+    size_t alignment = alignof(uint8_t);
+
+    test[0] = 0;
+
+    // Try to eliminate dead store optimisation and similar
+    if (alignment == 1000 && test[0] != 0) {
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}