Typically the size required to represent a dirent is stored in `d_reclen`. But
this not always the case for FreeBSD (for example, when walking a directory
over NFS).
This leads to ASAN false positives for `scandir` and similar functions. Because
ASAN uses `d_reclen` for the range to validate, it can overrun when `d_reclen` is
incorrect (too large).
This change adds `__sanitizer_dirsiz` which fixes the dirent size calculation
for FreeBSD. Other platforms continue to use `d_reclen`.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D151583
ucontext_t can be larger than its static size if it contains
AVX state and YMM/ZMM registers.
Currently a signal handler that tries to access that state
can produce false positives with random origins on stack.
Account for the additional ucontext_t state.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D116208
On FreeBSD the sys/timeb.h header has a #warning that it's deprecated.
However, we need to include this header here, so silence this warning that
is printed multiple times otherwise.
Reviewed By: dim
Differential Revision: https://reviews.llvm.org/D94963
Summary:
Instead of hand-crafting an offset into the structure returned by
dlopen(3) to get at the link map, use the documented API. This is
described in dlinfo(3): by calling it with `RTLD_DI_LINKMAP`, the
dynamic linker ensures the right address is returned.
This is a recommit of 92e267a94dc4272511be674062f8a3e8897b7083, with
dlinfo(3) expliclity being referenced only for FreeBSD, non-Android
Linux, NetBSD and Solaris. Other OSes will have to add their own
implementation.
Reviewers: devnexen, emaste, MaskRay, krytarowski
Reviewed By: krytarowski
Subscribers: krytarowski, vitalybuka, #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D73990
Summary:
Instead of hand-crafting an offset into the structure returned by
dlopen(3) to get at the link map, use the documented API. This is
described in dlinfo(3): by calling it with `RTLD_DI_LINKMAP`, the
dynamic linker ensures the right address is returned.
Reviewers: devnexen, emaste, MaskRay, krytarowski
Reviewed By: krytarowski
Subscribers: krytarowski, vitalybuka, #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D73990
See https://reviews.llvm.org/D58620 for discussion, and for the commands
I ran. In addition I also ran
for f in $(svn diff | diffstat | grep .cc | cut -f 2 -d ' '); do rg $f . ; done
and manually updated (many) references to renamed files found by that.
llvm-svn: 367463
