bitcoin/ci
fanquake 09351f51d2
Merge bitcoin/bitcoin#27699: random: drop syscall wrapper usage for getrandom()
5228223e1f ci: remove MSAN getrandom syscall workaround (fanquake)
d5e06919db random: switch to using getrandom() directly (fanquake)
c2ba3f5b0c random: add [[maybe_unused]] to GetDevURandom (fanquake)
c13c97dbf8 random: getentropy on macOS does not need unistd.h (fanquake)

Pull request description:

  This requires a linux kernel of `3.17`+, which seems entirely
  reasonable. `3.17` went EOL in 2015, and the last supported `3.x` kernel
  (`3.16`) went EOL > 4 years ago, in 2020. For reference, the current
  oldest maintained kernel is `4.14` (released 2017, going EOL Jan 2024).

  Support for `getrandom()` (and `getentropy()`) was added to
  glibc `2.25` https://sourceware.org/legacy-ml/libc-alpha/2017-02/msg00079.html:
  > * The getentropy and getrandom functions, and the <sys/random.h> header
    file have been added.

  and we already require `2.27` or later.

  All that being said, I don't think you would encounter a current day (+~6 months from now)
  system, running with kernel headers older than 3.17 (released 2014) but also having a
  glibc of 2.27+ (released 2018)?

  Removing this (our only) use of `syscall()` also means we can drop a workaround in our MSAN jobs.
  If this is merged, I'll drop the [same workaround in oss-fuzz](25946a5448/projects/bitcoin-core/build.sh (L49-L56)).

ACKs for top commit:
  josibake:
    ACK 5228223e1f
  hebasto:
    ACK 5228223e1f, I've tested build system changes on Ubuntu 22.04 and macOS Monterey 12.6.6 (x86_64).

Tree-SHA512: cc978e08510c461b875ca8c08ae176b4519fa1108f0efd74dcb7474518945357e0184e54423282c9a496de195e4ddc3e221ee78623bd63e24c50cc86acdf32e2
2023-05-22 11:34:58 +01:00
..
lint ci: Bump ci/lint/Dockerfile 2023-04-21 14:31:13 +02:00
retry build: update retry to current version 2019-10-30 18:49:57 -04:00
test Merge bitcoin/bitcoin#27699: random: drop syscall wrapper usage for getrandom() 2023-05-22 11:34:58 +01:00
lint_run_all.sh scripted-diff: Bump copyright headers 2020-12-31 09:45:41 +01:00
README.md ci: Pass full env to CI pod to avoid missing a var 2023-05-05 08:46:35 +02:00
test_imagefile ci: Cache package manager install step 2023-01-28 17:59:07 +01:00
test_run_all.sh move-only: Move almost all CI_EXEC code to 06_script_b.sh 2023-05-10 14:10:38 +02:00

CI Scripts

This directory contains scripts for each build step in each build stage.

Running a Stage Locally

Be aware that the tests will be built and run in-place, so please run at your own risk. If the repository is not a fresh git clone, you might have to clean files from previous builds or test runs first.

The ci needs to perform various sysadmin tasks such as installing packages or writing to the user's home directory. While it should be fine to run the ci system locally on you development box, the ci scripts can generally be assumed to have received less review and testing compared to other parts of the codebase. If you want to keep the work tree clean, you might want to run the ci system in a virtual machine with a Linux operating system of your choice.

To allow for a wide range of tested environments, but also ensure reproducibility to some extent, the test stage requires bash, docker, and python3 to be installed. To install all requirements on Ubuntu, run

sudo apt install bash docker.io python3

To run the default test stage,

./ci/test_run_all.sh

To run the test stage with a specific configuration,

FILE_ENV="./ci/test/00_setup_env_arm.sh" ./ci/test_run_all.sh

Configurations

The test files (FILE_ENV) are constructed to test a wide range of configurations, rather than a single pass/fail. This helps to catch build failures and logic errors that present on platforms other than the ones the author has tested.

Some builders use the dependency-generator in ./depends, rather than using the system package manager to install build dependencies. This guarantees that the tester is using the same versions as the release builds, which also use ./depends.

If no FILE_ENV has been specified or values are left out, 00_setup_env.sh is used as the default configuration with fallback values.

It is also possible to force a specific configuration without modifying the file. For example,

MAKEJOBS="-j1" FILE_ENV="./ci/test/00_setup_env_arm.sh" ./ci/test_run_all.sh

The files starting with 0n (n greater than 0) are the scripts that are run in order.

Cache

In order to avoid rebuilding all dependencies for each build, the binaries are cached and re-used when possible. Changes in the dependency-generator will trigger cache-invalidation and rebuilds as necessary.