From 3bf19bfdc618aabca8e2095e8f2ba4f533aa0bfc Mon Sep 17 00:00:00 2001 From: Caio Marcelo de Oliveira Filho Date: Mon, 16 Jul 2018 15:12:00 -0700 Subject: [PATCH] util/string_buffer: fix warning in tests MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit And also specify the maximum size when writing to static buffers. The warning below refers to the case where "str5" could be larger than "str5 - str4", then the strcat would have overlapping dst and src. Compiler doesn't pick up the bound from the snprintf above, so we make clear the bounds of str5 by using strncat() instead of strcat(). ../../src/util/tests/string_buffer/string_buffer_test.cpp: In member function ‘virtual void string_buffer_string_buffer_tests_Test::TestBody()’: ../../src/util/tests/string_buffer/string_buffer_test.cpp:106:10: warning: ‘char* strcat(char*, const char*)’ accessing 81 or more bytes at offsets 48 and 128 may overlap 1 byte at offset 128 [-Wrestrict] strcat(str4, str5); ~~~~~~^~~~~~~~~~~~ Reviewed-by: Anuj Phogat Reviewed-by: Thomas Helland --- src/util/tests/string_buffer/string_buffer_test.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/util/tests/string_buffer/string_buffer_test.cpp b/src/util/tests/string_buffer/string_buffer_test.cpp index 545f607fadd..afb6dfb2a19 100644 --- a/src/util/tests/string_buffer/string_buffer_test.cpp +++ b/src/util/tests/string_buffer/string_buffer_test.cpp @@ -95,15 +95,15 @@ TEST_F(string_buffer, string_buffer_tests) EXPECT_TRUE(strlen(buf->buf) == 0); /* Test a string with some formatting */ - sprintf(str4, "Testing formatting %d, %f", 100, 1.0); + snprintf(str4, sizeof(str4), "Testing formatting %d, %f", 100, 1.0); EXPECT_TRUE(_mesa_string_buffer_printf(buf, "Testing formatting %d, %f", 100, 1.0)); EXPECT_TRUE(strcmp(buf->buf, str4) == 0); /* Compile a string with some other formatting */ - sprintf(str5, "Testing formatting %d, %x", 100, 0xDEADBEAF); + snprintf(str5, sizeof(str5), "Testing formatting %d, %x", 100, 0xDEADBEAF); /* Concatenate str5 to str4 */ - strcat(str4, str5); + strncat(str4, str5, sizeof(str5)); /* Now use the formatted append function again */ EXPECT_TRUE(_mesa_string_buffer_printf(buf, "Testing formatting %d, %x", 100, 0xDEADBEAF)); -- 2.30.2