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author | kib <kib@FreeBSD.org> | 2008-11-27 11:27:59 +0000 |
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committer | kib <kib@FreeBSD.org> | 2008-11-27 11:27:59 +0000 |
commit | b683fcf69217f7195e73b2f05d608c952101f47a (patch) | |
tree | b42b5149fd6de96214266e5ed4d6e0b09734ce83 /libexec/rtld-elf/rtld.c | |
parent | 9ef49d8b6f56c91c360dacd78c3cab2300da33fb (diff) | |
download | FreeBSD-src-b683fcf69217f7195e73b2f05d608c952101f47a.zip FreeBSD-src-b683fcf69217f7195e73b2f05d608c952101f47a.tar.gz |
Add two rtld exported symbols, _rtld_atfork_pre and _rtld_atfork_post.
Threading library calls _pre before the fork, allowing the rtld to
lock itself to ensure that other threads of the process are out of
dynamic linker. _post releases the locks.
This allows the rtld to have consistent state in the child. Although
child may legitimately call only async-safe functions, the call may
need plt relocation resolution, and this requires working rtld.
Reported and debugging help by: rink
Reviewed by: kan, davidxu
MFC after: 1 month (anyway, not before 7.1 is out)
Diffstat (limited to 'libexec/rtld-elf/rtld.c')
-rw-r--r-- | libexec/rtld-elf/rtld.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c index 144ea6c..f67093a 100644 --- a/libexec/rtld-elf/rtld.c +++ b/libexec/rtld-elf/rtld.c @@ -206,6 +206,8 @@ static func_ptr_type exports[] = { (func_ptr_type) &_rtld_allocate_tls, (func_ptr_type) &_rtld_free_tls, (func_ptr_type) &dl_iterate_phdr, + (func_ptr_type) &_rtld_atfork_pre, + (func_ptr_type) &_rtld_atfork_post, NULL }; |