diff options
Diffstat (limited to 'compiler-rt/lib/asan/asan_linux.cpp')
| -rw-r--r-- | compiler-rt/lib/asan/asan_linux.cpp | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/compiler-rt/lib/asan/asan_linux.cpp b/compiler-rt/lib/asan/asan_linux.cpp index 1d92c530bd11..defd81bc19e2 100644 --- a/compiler-rt/lib/asan/asan_linux.cpp +++ b/compiler-rt/lib/asan/asan_linux.cpp @@ -131,30 +131,24 @@ static int FindFirstDSOCallback(struct dl_phdr_info *info, size_t size, VReport(2, "info->dlpi_name = %s\tinfo->dlpi_addr = %p\n", info->dlpi_name, (void *)info->dlpi_addr); - // Continue until the first dynamic library is found - if (!info->dlpi_name || info->dlpi_name[0] == 0) - return 0; - - // Ignore vDSO - if (internal_strncmp(info->dlpi_name, "linux-", sizeof("linux-") - 1) == 0) - return 0; + const char **name = (const char **)data; -#if SANITIZER_FREEBSD || SANITIZER_NETBSD // Ignore first entry (the main program) - char **p = (char **)data; - if (!(*p)) { - *p = (char *)-1; + if (!*name) { + *name = ""; return 0; } -#endif -#if SANITIZER_SOLARIS - // Ignore executable on Solaris - if (info->dlpi_addr == 0) +# if SANITIZER_LINUX + // Ignore vDSO. glibc versions earlier than 2.15 (and some patched + // by distributors) return an empty name for the vDSO entry, so + // detect this as well. + if (!info->dlpi_name[0] || + internal_strncmp(info->dlpi_name, "linux-", sizeof("linux-") - 1) == 0) return 0; -#endif +# endif - *(const char **)data = info->dlpi_name; + *name = info->dlpi_name; return 1; } @@ -175,7 +169,7 @@ void AsanCheckDynamicRTPrereqs() { // Ensure that dynamic RT is the first DSO in the list const char *first_dso_name = nullptr; dl_iterate_phdr(FindFirstDSOCallback, &first_dso_name); - if (first_dso_name && !IsDynamicRTName(first_dso_name)) { + if (first_dso_name && first_dso_name[0] && !IsDynamicRTName(first_dso_name)) { Report("ASan runtime does not come first in initial library list; " "you should either link runtime to your application or " "manually preload it with LD_PRELOAD.\n"); |