This is a temporary debugging trick you can use to turn segfaults into more helpful
logged error messages with stack trace details. The downside is that every allocation
will be leaked!
This commit write out Mach-O header in the linker's `flush`
method. The header currently only populates the magic number,
filetype, and cpu info.
Signed-off-by: Jakub Konka <kubkon@jakubkonka.com>
I have observed on Linux writing and reading the same file many times
without the mtime changing, despite the file system having nanosecond
granularity (and about 1 millisecond worth of nanoseconds passing between
modifications). I am calling this a Linux Kernel Bug and adding file
size to the cache hash manifest as a mitigation. As evidence, macOS does
not exhibit this behavior.
This means it is possible, on Linux, for a file to be added to the cache
hash, and, if it is updated with the same file size, same inode, within
about 1 millisecond, the cache system will give us a false positive,
saying it is unmodified. I don't see any way to improve this situation
without fixing the bug in the Linux kernel.
closes#6082
I empirically observed mtime not changing when rapidly writing the same
file name within the same millisecond of wall clock time, despite the
mtime field having nanosecond precision.
I believe this fixes the CI test failures.
* Factor redundant code in std/crypto/chacha20
* Add support for XChaCha20, and the XChaCha20-Poly1305 construction.
XChaCha20 is a 24-byte version of ChaCha20, is widely implemented
and is on the standards track:
https://tools.ietf.org/html/draft-irtf-cfrg-xchacha-03
* Add support for encryption/decryption with the authentication tag
detached from the ciphertext
* Add wrappers with an API similar to the Gimli AEAD type, so that
we can use and benchmark AEADs with a common API.
This is a rewrite of the x25519 code, that generalizes support for
common primitives based on the same finite field.
- Low-level operations can now be performed over the curve25519 and
edwards25519 curves, as well as the ristretto255 group.
- Ed25519 signatures have been implemented.
- X25519 is now about twice as fast.
- mem.timingSafeEqual() has been added for constant-time comparison.
Domains have been clearly separated, making it easier to later add
platform-specific implementations.
This is part of an ongoing effort to reduce size of in-memory AST. This
enum flattening pattern is widespread throughout the self-hosted
compiler.
This is a API breaking change for consumers of the self-hosted parser.
* introduce a dump() function on Module.Fn which helpfully prints to
stderr the ZIR representation of a function (can be called before
attempting to codegen it). This is a debugging tool.
* implement x86 codegen for loops
* liveness: fix analysis of conditional branches. The logic was buggy
in a couple ways:
- it never actually saved the results into the IR instruction (fixed now)
- it incorrectly labeled operands as dying when their true death was
after the conditional branch ended (fixed now)
* zir rendering is enhanced to show liveness analysis results. this
helps when debugging liveness analysis.
* fix bug in zir rendering not numbering instructions correctly
closes#6021
