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Don't rely on nullptr deref recovery 

Fixes this -fno-sanitize-recover=undefined fail,

/types/language: hb-common.cc:385:20: runtime error: member access within null pointer of type 'const struct hb_language_impl_t'
    #0 0x4caa34 in hb_language_to_string /home/user/code/harfbuzz/src/hb-common.cc:385:20
    #1 0x4c9be8 in test_types_language /home/user/code/harfbuzz/test/api/test-common.c:205:3
    #2 0x7f9557e72f49  (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x72f49)
    #3 0x7f9557e72e7a  (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x72e7a)
    #4 0x7f9557e73121 in g_test_run_suite (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x73121)
    #5 0x7f9557e73140 in g_test_run (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x73140)
    #6 0x4c88a3 in hb_test_run /home/user/code/harfbuzz/test/api/./hb-test.h:88:10
    #7 0x4c88a3 in main /home/user/code/harfbuzz/test/api/test-common.c:224:10
    #8 0x7f9556e64b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
    #9 0x41e7d9 in _start (/home/user/code/harfbuzz/test/api/test-common+0x41e7d9)
This commit is contained in:
Ebrahim Byagowi 2019-09-18 00:47:55 +04:30
parent bfb155a5f1
commit d8af9ee017
1 changed files with 2 additions and 1 deletions
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3
src/hb-common.cc
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@ -381,7 +381,8 @@ hb_language_from_string (const char *str, int len)
const char *
hb_language_to_string (hb_language_t language)
{
/* This is actually nullptr-safe! */
if (!language) return nullptr;
return language->s;
}