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| author | Ian Lance Taylor <iant@golang.org> | 2017-09-22 13:38:10 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2017-09-22 13:38:10 +0000 |
| commit | 8c2ea6b20a48d626d3dae78ac177affb7f67e182 (patch) | |
| tree | 45668dec72f6f6dbdf72fb967ca86b70695798e0 | |
| parent | 4d6e2f33a437fc6ead8218bf5f0e2cdb3e834d9e (diff) | |
| download | gcc-8c2ea6b20a48d626d3dae78ac177affb7f67e182.zip gcc-8c2ea6b20a48d626d3dae78ac177affb7f67e182.tar.gz gcc-8c2ea6b20a48d626d3dae78ac177affb7f67e182.tar.bz2 | |
re PR sanitizer/77631 (no symbols in backtrace shown by ASan when debug info is split)
PR sanitizer/77631
* configure.ac: Check for lstat and readlink.
* elf.c (lstat, readlink): Provide dummy versions if real versions
are not available.
* configure, config.h.in: Rebuild.
From-SVN: r253095
| -rw-r--r-- | libbacktrace/ChangeLog | 8 | ||||
| -rw-r--r-- | libbacktrace/config.h.in | 6 | ||||
| -rwxr-xr-x | libbacktrace/configure | 13 | ||||
| -rw-r--r-- | libbacktrace/configure.ac | 1 | ||||
| -rw-r--r-- | libbacktrace/elf.c | 29 |
5 files changed, 57 insertions, 0 deletions
diff --git a/libbacktrace/ChangeLog b/libbacktrace/ChangeLog index d611a1f..ed99678 100644 --- a/libbacktrace/ChangeLog +++ b/libbacktrace/ChangeLog @@ -1,3 +1,11 @@ +2017-09-22 Ian Lance Taylor <iant@golang.org> + + PR sanitizer/77631 + * configure.ac: Check for lstat and readlink. + * elf.c (lstat, readlink): Provide dummy versions if real versions + are not available. + * configure, config.h.in: Rebuild. + 2017-09-21 Ian Lance Taylor <iant@google.com> PR go/82284 diff --git a/libbacktrace/config.h.in b/libbacktrace/config.h.in index 9fc7715..1c38e8e 100644 --- a/libbacktrace/config.h.in +++ b/libbacktrace/config.h.in @@ -37,9 +37,15 @@ /* Define if AIX loadquery is available. */ #undef HAVE_LOADQUERY +/* Define to 1 if you have the `lstat' function. */ +#undef HAVE_LSTAT + /* Define to 1 if you have the <memory.h> header file. */ #undef HAVE_MEMORY_H +/* Define to 1 if you have the `readlink' function. */ +#undef HAVE_READLINK + /* Define to 1 if you have the <stdint.h> header file. */ #undef HAVE_STDINT_H diff --git a/libbacktrace/configure b/libbacktrace/configure index 3ef9331..660a778 100755 --- a/libbacktrace/configure +++ b/libbacktrace/configure @@ -12708,6 +12708,19 @@ cat >>confdefs.h <<_ACEOF #define HAVE_DECL_STRNLEN $ac_have_decl _ACEOF +for ac_func in lstat readlink +do : + as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh` +ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var" +eval as_val=\$$as_ac_var + if test "x$as_val" = x""yes; then : + cat >>confdefs.h <<_ACEOF +#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1 +_ACEOF + +fi +done + # Check for getexecname function. if test -n "${with_target_subdir}"; then diff --git a/libbacktrace/configure.ac b/libbacktrace/configure.ac index 97e6e96..c88122d 100644 --- a/libbacktrace/configure.ac +++ b/libbacktrace/configure.ac @@ -373,6 +373,7 @@ if test "$have_fcntl" = "yes"; then fi AC_CHECK_DECLS(strnlen) +AC_CHECK_FUNCS(lstat readlink) # Check for getexecname function. if test -n "${with_target_subdir}"; then diff --git a/libbacktrace/elf.c b/libbacktrace/elf.c index eb7d303..fac4686 100644 --- a/libbacktrace/elf.c +++ b/libbacktrace/elf.c @@ -75,6 +75,35 @@ xstrnlen (const char *s, size_t maxlen) #endif +#ifndef HAVE_LSTAT + +/* Dummy version of lstat for systems that don't have it. */ + +static int +xlstat (const char *path ATTRIBUTE_UNUSED, struct stat *st ATTRIBUTE_UNUSED) +{ + return -1; +} + +#define lstat xlstat + +#endif + +#ifndef HAVE_READLINK + +/* Dummy version of readlink for systems that don't have it. */ + +static ssize_t +xreadlink (const char *path ATTRIBUTE_UNUSED, char *buf ATTRIBUTE_UNUSED, + size_t bufsz ATTRIBUTE_UNUSED) +{ + return -1; +} + +#define readlink xreadlink + +#endif + #ifndef HAVE_DL_ITERATE_PHDR /* Dummy version of dl_iterate_phdr for systems that don't have it. */ |