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t_msan_free.sh revision 1.3 
      1 # Copyright (c) 2018 The NetBSD Foundation, Inc.
      2 # All rights reserved.
      3 #
      4 # This code is derived from software contributed to The NetBSD Foundation
      5 # by Yang Zheng.
      6 #
      7 # Redistribution and use in source and binary forms, with or without
      8 # modification, are permitted provided that the following conditions
      9 # are met:
     10 # 1. Redistributions of source code must retain the above copyright
     11 #    notice, this list of conditions and the following disclaimer.
     12 # 2. Redistributions in binary form must reproduce the above copyright
     13 #    notice, this list of conditions and the following disclaimer in the
     14 #    documentation and/or other materials provided with the distribution.
     15 #
     16 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26 # POSSIBILITY OF SUCH DAMAGE.
     27 #
     28 
     29 test_target()
     30 {
     31 	SUPPORT='n'
     32 	if uname -m | grep -q "amd64" && command -v cc >/dev/null 2>&1 && \
     33 		   ! echo __clang__ | cc -E - | grep -q __clang__; then
     34 		# only clang with major version newer than 7 is supported
     35 		CLANG_MAJOR=`echo __clang_major__ | cc -E - | grep -o '^[[:digit:]]'`
     36 		if [ "$CLANG_MAJOR" -ge "7" ]; then
     37 			SUPPORT='y'
     38 		fi
     39 	fi
     40 }
     41 
     42 atf_test_case free
     43 free_head() {
     44 	atf_set "descr" "Test memory sanitizer for use-after-free case"
     45 	atf_set "require.progs" "cc paxctl"
     46 }
     47 
     48 atf_test_case free_profile
     49 free_profile_head() {
     50 	atf_set "descr" "Test memory sanitizer for use-after-free with profiling option"
     51 	atf_set "require.progs" "cc paxctl"
     52 }
     53 atf_test_case free_pic
     54 free_pic_head() {
     55 	atf_set "descr" "Test memory sanitizer for use-after-free with position independent code (PIC) flag"
     56 	atf_set "require.progs" "cc paxctl"
     57 }
     58 atf_test_case free_pie
     59 free_pie_head() {
     60 	atf_set "descr" "Test memory sanitizer for use-after-free with position independent execution (PIE) flag"
     61 	atf_set "require.progs" "cc paxctl"
     62 }
     63 
     64 free_body(){
     65 	cat > test.c << EOF
     66 #include <stdlib.h>
     67 int main() {
     68   int *a = (int *)malloc(sizeof(int));
     69   *a = 9;
     70   free(a);
     71   return *a;
     72 }
     73 EOF
     74 
     75 	cc -fsanitize=memory -o test test.c
     76 	paxctl +a test
     77 	atf_check -s ignore -o ignore -e match:"WARNING: MemorySanitizer: use-of-uninitialized-value" ./test
     78 }
     79 
     80 free_profile_body(){
     81 	cat > test.c << EOF
     82 #include <stdlib.h>
     83 int main() {
     84   int *a = (int *)malloc(sizeof(int));
     85   *a = 9;
     86   free(a);
     87   return *a;
     88 }
     89 EOF
     90 
     91 	cc -fsanitize=memory -o test -pg test.c
     92 	paxctl +a test
     93 	atf_check -s ignore -o ignore -e match:"WARNING: MemorySanitizer: use-of-uninitialized-value" ./test
     94 }
     95 
     96 free_pic_body(){
     97 	cat > test.c << EOF
     98 #include <stdio.h>
     99 #include <stdlib.h>
    100 int help(int);
    101 int main(int argc, char **argv) {return help(argc);}
    102 EOF
    103 
    104 	cat > pic.c << EOF
    105 #include <stdlib.h>
    106 int help(int argc) {
    107   int *a = (int *)malloc(sizeof(int));
    108   *a = 9;
    109   free(a);
    110   return *a;
    111 }
    112 EOF
    113 
    114 	cc -fsanitize=memory -fPIC -shared -o libtest.so pic.c
    115 	cc -o test test.c -fsanitize=memory -L. -ltest
    116 	paxctl +a test
    117 
    118 	export LD_LIBRARY_PATH=.
    119 	atf_check -s ignore -o ignore -e match:"WARNING: MemorySanitizer: use-of-uninitialized-value" ./test
    120 }
    121 free_pie_body(){
    122 
    123 	#check whether -pie flag is supported on this architecture
    124 	if ! cc -pie -dM -E - < /dev/null 2>/dev/null >/dev/null; then
    125 		atf_set_skip "cc -pie not supported on this architecture"
    126 	fi
    127 	cat > test.c << EOF
    128 #include <stdlib.h>
    129 int main() {
    130   int *a = (int *)malloc(sizeof(int));
    131   *a = 9;
    132   free(a);
    133   return *a;
    134 }
    135 EOF
    136 
    137 	cc -fsanitize=memory -o test -fpie -pie test.c
    138 	paxctl +a test
    139 	atf_check -s ignore -o ignore -e match:"WARNING: MemorySanitizer: use-of-uninitialized-value" ./test
    140 }
    141 
    142 atf_test_case target_not_supported
    143 target_not_supported_head()
    144 {
    145 	atf_set "descr" "Test forced skip"
    146 }
    147 
    148 target_not_supported_body()
    149 {
    150 	atf_skip "Target is not supported"
    151 }
    152 
    153 atf_init_test_cases()
    154 {
    155 	test_target
    156 	test $SUPPORT = 'n' && {
    157 		atf_add_test_case target_not_supported
    158 		return 0
    159 	}
    160 	atf_add_test_case free
    161 	atf_add_test_case free_profile
    162 	atf_add_test_case free_pie
    163 	atf_add_test_case free_pic
    164 }
    165