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| author | Frank Ch. Eigler <fche@redhat.com> | 2024-09-19 17:06:48 -0400 |
|---|---|---|
| committer | Frank Ch. Eigler <fche@redhat.com> | 2024-09-20 16:14:03 -0400 |
| commit | d979aad8c8d44d40794cc4cf0baae6f7200f78aa (patch) | |
| tree | 8c30da22b8557a1c8869790106080f8fbdee7a40 /config-ml.in | |
| parent | 5b84cbc35ad574483781e62b7fddbcbf73cf2ad3 (diff) | |
| download | gdb-d979aad8c8d44d40794cc4cf0baae6f7200f78aa.zip gdb-d979aad8c8d44d40794cc4cf0baae6f7200f78aa.tar.gz gdb-d979aad8c8d44d40794cc4cf0baae6f7200f78aa.tar.bz2 | |
ld: support --build-id=xx mode
The is patch adds a new ld build-id computation mode, "xx", using
xxhash in its 128-bit mode. The patch prereqs the xxhash-devel
headers being installed, and uses the "all-inlined" model, so no
run-time or link-time library dependence exists.
The xxhash mode performs well, saving roughly 20% of total userspace
run time from an ld job over a 800MB shared library relative to sha1.
128 bits of good hash should be collision-resistant to a number of
distinct binaries that numbers in the 2**32 - 2**64 range, even if not
"crypto" level hash. Confirmations of this are in progress.
ld/configury: add --with-xxhash mode, different from gdb case
because only using it in inline mode
ld/ldbuildid.c: add "xx" mode, #if WITH_XXHASH
ld/NEWS, ld.texi: mention new option
ld/lexsup.c: add enumeration of --build-id STYLES to --help
ld/testsuite/ld-elf/build-id.exp: add test case for 0xHEX case
and conditional for xx case;
also, simply tcl list syntax
https://inbox.sourceware.org/binutils/20240917201509.GB26396@redhat.com/
Signed-off-by: Frank Ch. Eigler <fche@redhat.com>
Diffstat (limited to 'config-ml.in')
0 files changed, 0 insertions, 0 deletions