tests: lib: Add test for cbprintf_package

Add test to validate cbprintf packaging on various platforms

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>

tests/lib/cbprintf_package/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.13.1)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(cbprintf_package)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/lib/cbprintf_package/prj.conf

@@ -0,0 +1,2 @@
+CONFIG_ZTEST=y
+CONFIG_CBPRINTF_COMPLETE=y

tests/lib/cbprintf_package/src/main.c

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <ztest.h>
+#include <sys/cbprintf.h>
+
+#define CBPRINTF_DEBUG 1
+
+struct out_buffer {
+	char *buf;
+	size_t idx;
+	size_t size;
+};
+
+static int out(int c, void *dest)
+{
+	int rv = EOF;
+	struct out_buffer *buf = dest;
+
+	if (buf->idx < buf->size) {
+		buf->buf[buf->idx++] = (char)(unsigned char)c;
+		rv = (int)(unsigned char)c;
+	}
+	return rv;
+}
+
+static char runtime_buf[128];
+static char compare_buf[128];
+
+void dump(const char *desc, uint8_t *package, size_t len)
+{
+	printk("%s package %p:\n", desc, package);
+	for (size_t i = 0; i < len; i++) {
+		printk("%02x ", package[i]);
+	}
+	printk("\n");
+}
+
+void unpack(const char *desc, struct out_buffer *buf,
+	    uint8_t *package, size_t len)
+{
+	cbpprintf(out, buf, package);
+	buf->buf[buf->idx] = 0;
+	zassert_equal(strcmp(buf->buf, compare_buf), 0,
+		      "Strings differ\nexp: |%s|\ngot: |%s|\n",
+		      compare_buf, buf->buf);
+}
+
+#define TEST_PACKAGING(fmt, ...) do { \
+	snprintf(compare_buf, sizeof(compare_buf), fmt, __VA_ARGS__); \
+	printk("-----------------------------------------\n"); \
+	printk("%s\n", compare_buf); \
+	struct out_buffer rt_buf = { \
+		.buf = runtime_buf, .idx = 0, .size = sizeof(runtime_buf) \
+	}; \
+	int rc = cbprintf_package(NULL, 0, fmt, __VA_ARGS__); \
+	zassert_true(rc > 0, "cbprintf_package() returned %d", rc); \
+	size_t len = rc; \
+	uint8_t __aligned(8) rt_package[len]; \
+	memset(rt_package, 0, len); \
+	rc = cbprintf_package(rt_package, len, fmt, __VA_ARGS__); \
+	zassert_equal(rc, len, "cbprintf_package() returned %d, expected %d", rc, len); \
+	dump("runtime", rt_package, len); \
+	unpack("runtime", &rt_buf, rt_package, len); \
+} while (0)
+
+void test_cbprintf_package(void)
+{
+	volatile signed char sc = -11;
+	int i = 100;
+	char c = 'a';
+	static const short s = -300;
+	long li = -1111111111;
+	long long lli = 0x1122334455667788;
+	unsigned char uc = 100;
+	unsigned int ui = 0x12345;
+	unsigned short us = 0x1234;
+	unsigned long ul = 0xaabbaabb;
+	unsigned long long ull = 0xaabbaabbaabb;
+	float f = -1.234;
+	double d = 1.2333;
+
+	/* tests to exercize different element alignments */
+	TEST_PACKAGING("test long %x %lx %x", 0xb1b2b3b4, li, 0xe4e3e2e1);
+	TEST_PACKAGING("test long long %x %llx %x", 0xb1b2b3b4, lli, 0xe4e3e2e1);
+	if (IS_ENABLED(CONFIG_CBPRINTF_FP_SUPPORT)) {
+		TEST_PACKAGING("test double %x %f %x", 0xb1b2b3b4, d, 0xe4e3e2e1);
+	}
+
+	/* tests with varied elements */
+	TEST_PACKAGING("test %d %hd %hhd", i, s, sc);
+	TEST_PACKAGING("test %ld %llx %hhu %hu %u", li, lli, uc, us, ui);
+	TEST_PACKAGING("test %lu %llu", ul, ull);
+	TEST_PACKAGING("test %c %p", c, &c);
+	if (IS_ENABLED(CONFIG_CBPRINTF_FP_SUPPORT)) {
+		TEST_PACKAGING("test %f %a", f, d);
+	}
+}
+
+void test_main(void)
+{
+	printk("sizeof:  int=%zu long=%zu ptr=%zu long long=%zu double=%zu long double=%zu\n",
+	       sizeof(int), sizeof(long), sizeof(void *), sizeof(long long),
+	       sizeof(double), sizeof(long double));
+	printk("alignof: int=%zu long=%zu ptr=%zu long long=%zu double=%zu long double=%zu\n",
+	       __alignof__(int), __alignof__(long), __alignof__(void *),
+	       __alignof__(long long), __alignof__(double), __alignof__(long double));
+
+	ztest_test_suite(cbprintf_package,
+			 ztest_unit_test(test_cbprintf_package)
+			 );
+
+	ztest_run_test_suite(cbprintf_package);
+}

tests/lib/cbprintf_package/testcase.yaml

@@ -0,0 +1,19 @@
+tests:
+  libraries.cbprintf_package:
+    tags: cbprintf
+    integration_platforms:
+      - native_posix
+    platform_allow: >
+      qemu_arc_em qemu_arc_hs qemu_cortex_a53 qemu_cortex_m0 qemu_cortex_m3
+      qemu_cortex_r5 qemu_leon3 qemu_nios2 qemu_riscv32 qemu_riscv64 qemu_x86
+      qemu_x86_64 qemu_xtensa
+  libraries.cbprintf_package_fp:
+    tags: cbprintf
+    integration_platforms:
+      - native_posix
+    platform_allow: >
+      qemu_arc_em qemu_arc_hs qemu_cortex_a53 qemu_cortex_m0 qemu_cortex_m3
+      qemu_cortex_r5 qemu_leon3 qemu_nios2 qemu_riscv32 qemu_riscv64
+      qemu_x86_64 qemu_xtensa
+    extra_configs:
+      - CONFIG_CBPRINTF_FP_SUPPORT=y