Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 105 insertions, 0 deletions

diff --git a/roms/skiboot/core/test/run-console-log-buf-overrun.c b/roms/skiboot/core/test/run-console-log-buf-overrun.c
new file mode 100644
index 000000000..83774c4c9
--- /dev/null
+++ b/roms/skiboot/core/test/run-console-log-buf-overrun.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+/*
+ * Copyright 2015-2016 IBM Corp.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <stdarg.h>
+#include <compiler.h>
+
+unsigned long tb_hz = 512000000;
+
+#define __TEST__
+
+#define CHECK_BUF_ASSERT(buf, str)			\
+	assert(memcmp(buf, str, strlen(str)) == 0)
+
+#define CHECK_ASSERT(str)				\
+	CHECK_BUF_ASSERT(console_buffer, str)
+
+int huge_tb;
+
+static inline unsigned long mftb(void)
+{
+	/*
+	 * return huge value for TB that overrun tmp[16] buffer defined
+	 * in print_itoa().
+	 */
+	if (huge_tb)
+		return 1223372515963611388;
+	else
+		return 42;
+}
+
+#include "../../libc/include/stdio.h"
+#include "../console-log.c"
+#include "../../libc/stdio/snprintf.c"
+#include "../../libc/stdio/vsnprintf.c"
+
+char console_buffer[4096];
+struct debug_descriptor debug_descriptor;
+
+bool flushed_to_drivers;
+
+ssize_t console_write(bool flush_to_drivers, const void *buf, size_t count)
+{
+	flushed_to_drivers = flush_to_drivers;
+	memcpy(console_buffer, buf, count);
+	return count;
+}
+
+int main(void)
+{
+	unsigned long value = 0xffffffffffffffff;
+	char *ptr = console_buffer;
+
+	debug_descriptor.console_log_levels = 0x75;
+
+	/* Test for huge TB value. */
+	huge_tb = 1;
+
+	prlog(PR_EMERG, "Hello World");
+	CHECK_ASSERT("[2389399445.123611388,0] Hello World");
+
+	memset(console_buffer, 0, sizeof(console_buffer));
+
+	/* Test for normal TB with huge unsigned long value */
+	huge_tb = 0;
+
+	prlog(PR_EMERG, "Hello World %lu", value);
+	CHECK_ASSERT("[    0.000000042,0] Hello World 18446744073709551615");
+
+	printf("Hello World %lu", value);
+	CHECK_ASSERT("[    0.000000042,5] Hello World 18446744073709551615");
+
+	/*
+	 * Test string of size > 320
+	 *
+	 * core/console-log.c:vprlog() uses buffer[320] to print message
+	 * Try printing more than 320 bytes to test stack corruption.
+	 * You would see Segmentation fault on stack corruption.
+	 */
+	prlog(PR_EMERG, "%330s", "Hello World");
+
+	memset(console_buffer, 0, sizeof(console_buffer));
+
+	/*
+	 * Test boundary condition.
+	 *
+	 * Print string of exact size 320. We should see string truncated
+	 * with console_buffer[319] == '\0'.
+	 */
+	memset(console_buffer, 0, sizeof(console_buffer));
+
+	prlog(PR_EMERG, "%300s", "Hello World");
+	assert(console_buffer[319] == 0);
+
+	/* compare truncated string */
+	ptr += 320 - strlen("Hello World");
+	CHECK_BUF_ASSERT(ptr, "Hello Worl");
+
+	return 0;
+}