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2299dfd4ba
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>
107 lines
2.3 KiB
Plaintext
107 lines
2.3 KiB
Plaintext
# Expect script for --build-id tests.
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# Copyright (C) 2021-2024 Free Software Foundation, Inc.
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#
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# This file is part of the GNU Binutils.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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# Exclude non-ELF targets.
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if ![is_elf_format] {
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return
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}
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if { [istarget frv-*-*] || [istarget lm32-*-*] } {
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return
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}
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if { !([istarget *-*-linux*]
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|| [istarget arm*-*-uclinuxfdpiceabi]
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|| [istarget *-*-nacl*]
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|| [istarget *-*-gnu*]) } then {
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return
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}
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set stylelist {"" "--build-id" "--build-id=none" "--build-id=md5"
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"--build-id=sha1" "--build-id=guid" "--build-id=0xdeadbeef"}
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run_ld_link_tests {
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{
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"pr28639a.o"
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"-r --build-id=md5"
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""
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""
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{start.s}
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{{readelf {--notes} pr28639a.rd}}
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"pr28639a.o"
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}
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{
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"pr28639b.o"
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"-r --build-id"
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""
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""
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{dummy.s}
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{{readelf {--notes} pr28639b.rd}}
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"pr28639b.o"
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}
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{
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"pr28639a.o deadbeef"
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"-r --build-id=0xdeadbeef"
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""
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""
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{start.s}
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{{readelf {--notes} pr28639e.rd}}
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"pr28639a.o"
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}
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{
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"pr28639a"
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"--build-id tmpdir/pr28639a.o tmpdir/pr28639b.o"
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""
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""
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{dummy.s}
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{{readelf {--notes} pr28639b.rd}
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{readelf {--notes} pr28639c.rd}}
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"pr28639a"
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}
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{
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"pr28639b"
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"--build-id=none tmpdir/pr28639a.o tmpdir/pr28639b.o"
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""
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""
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{dummy.s}
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{{readelf {--notes} pr28639d.rd}}
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"pr28639b"
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}
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}
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# see if linker supports xx style also
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catch "exec $ld --help | grep -A2 -- --build-id | grep Styles" tmp
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if {[string first ",xx," $tmp] >= 0} then {
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run_ld_link_tests {
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{
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"pr28639a.o xx"
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"-r --build-id=xx"
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""
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""
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{start.s}
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{{readelf {--notes} pr28639a.rd}} # 16 bytes
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"pr28639a.o"
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}
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}
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}
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