Introduce a way to optionally enable Rust integration for our builds. No
actual Rust code is added yet and specifying the flag has no effect
other than failing the build if rustc and cargo are unavailable.
Increase the maximum allowed size passed to mprotect(PROT_WRITE)
from 1MB to 16MB. This was necessary with the glibc allocator
in order to allow worker threads to allocate more memory --
which in turn is necessary because of our new use of worker
threads for compression.
Closes ticket #22096. Found while working on #21648.
This patch changes two things in our LZMA compression backend:
- We lower the preset values for all `compression_level_t` values to
ensure that we can run the LZMA decoder with less than 65 MB of memory
available. This seems to have a small impact on the real world usage
and fits well with our needs.
- We set the upper bound of memory usage for the LZMA decoder to 16 MB.
See: https://bugs.torproject.org/21665
There were two issues here: first, zstd didn't exhibit the right
behavior unless it got a very large input. That's fine.
The second issue was a genuine bug, fixed by 39cfaba9e2.
This patch refactors our compression tests such that deflate, gzip,
lzma, and zstd are all tested using the same code.
Additionally we use run-time checks to see if the given compression
method is supported instead of using HAVE_LZMA and HAVE_ZSTD.
See: https://bugs.torproject.org/22085
Bridge lines in torrc can contain key=value settings as per-connection
arguments to a pluggable transport. tor.1.txt hadn't been updated to
reflect this.
This patch adds support for measuring the approximated memory usage by
the individual `tor_zstd_compress_state_t` object instances.
See: https://bugs.torproject.org/22066
This patch fixes the documentation string for `tor_uncompress()` to
ensure that it does not explicitly mention zlib or gzip since we now
support multiple compression backends.
This patch adds support for measuring the approximated memory usage by
the individual `tor_lzma_compress_state_t` object instances.
The LZMA library provides the functions `lzma_easy_encoder_memusage()`
and `lzma_easy_decoder_memusage()` which is used to find the estimated
usage in bytes.
See: https://bugs.torproject.org/22066
We hadn't needed this before, because most getpid() callers on Linux
were looking at the vDSO version of getpid(). I don't know why at
least one version of OpenSSL seems to be ignoring the vDSO, but this
change should fix it.
Fixes bug 21943; bugfix on 0.2.5.1-alpha when the sandbox was
introduced.
The `tor_compress_state_t` data-type is used as a wrapper around the
more specialized state-types used by the various compression backends.
This patch ensures that the overhead of this "thin" wrapper type is
included in the value returned by `tor_compress_get_total_allocation()`.
See: https://bugs.torproject.org/22066
