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| author |   visa <visa@openbsd.org> | 2019-02-02 14:32:58 +0000 |
|---|---|---|
| committer | visa <visa@openbsd.org> | 2019-02-02 14:32:58 +0000 |
| commit | b4d942bd82e640e729b02b7ed1d9224ddd3c46d4 (patch) | |
| tree | 16003c258d2e2e549fea0864287fd3574499df8e /lib/libcxx/src/filesystem/operations.cpp | |
| parent | An extra test that is known to trigger problems with some versions of (diff) | |
| download | wireguard-openbsd-b4d942bd82e640e729b02b7ed1d9224ddd3c46d4.tar.xz wireguard-openbsd-b4d942bd82e640e729b02b7ed1d9224ddd3c46d4.zip | |
Improve stack trace saving on amd64:
* Replace unnecessary use of db_get_value() with direct access of
f_retaddr. The trace function assumes that the chain of frames
is good in terms of alignment and content.
* Replace the for loop with a while loop and drop the check
"frame != NULL" from the loop condition. The check is redundant with
the "!INKERNEL(frame)" condition. The code already assumes that the
initial frame is valid.
* Stop iteration if f_retaddr is a non-kernel address in order to
not save a user address at the end of the trace. This additionally
fixes a kernel crash that would happen if the user thread had
a broken frame pointer.
* Fix erroneous skipping of the second stack frame.
OK mpi@
Diffstat (limited to 'lib/libcxx/src/filesystem/operations.cpp')
0 files changed, 0 insertions, 0 deletions