[all-commits] [llvm/llvm-project] 98feb2: [profile] Only use NT_GNU_BUILD_ID if supported
Tom Stellard via All-commits
all-commits at lists.llvm.org
Wed Aug 18 12:55:40 PDT 2021
Branch: refs/heads/release/13.x
Home: https://github.com/llvm/llvm-project
Commit: 98feb20df14e6cf9ce77f097ceb8dd188c9070a7
https://github.com/llvm/llvm-project/commit/98feb20df14e6cf9ce77f097ceb8dd188c9070a7
Author: Rainer Orth <ro at gcc.gnu.org>
Date: 2021-08-18 (Wed, 18 Aug 2021)
Changed paths:
M compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
Log Message:
-----------
[profile] Only use NT_GNU_BUILD_ID if supported
The Solaris buildbots have been broken for some time by the unconditional
use of `NT_GNU_BUILD_ID`, e.g. Solaris/sparcv9
<https://lab.llvm.org/staging/#/builders/50/builds/4910> and Solaris/amd64
<https://lab.llvm.org/staging/#/builders/101/builds/3751>. Being a GNU
extension, it is not defined in `<sys/elf.h>`. However, providing a
fallback definition doesn't help because the code also relies on
`__ehdr_start`, another unportable GNU extension that most likely never
will be implemented in Solaris `ld`. Besides, there's reallly no point in
supporting build ids since they aren't used on Solaris at all.
This patch fixes this by making the relevant code conditional on the
definition of `NT_GNU_BUILD_ID`.
Tested on `amd64-pc-solaris2.11` and `sparcv9-sun-solaris2.11`.
Differential Revision: https://reviews.llvm.org/D107556
(cherry picked from commit 779714f89bef33f153841b7ec969578ee22b3694)
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