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store: delete obsolete lsof-disabling code

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Since Ifa0adda7984e, we don't use this code anymore on macOS, so we have
no reason to have a knob to disable it anymore.

Change-Id: Ie29a8a8978d9aefd4551895f4f9b3cc0827496df
This commit is contained in:
Jade Lovelace 2024-06-27 22:47:21 -07:00
parent d92712673b
commit d85309f7ca
2 changed files with 13 additions and 18 deletions
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3
doc/manual/src/contributing/testing.md
View file

@ -433,9 +433,6 @@ I grepped `src/` for `get[eE]nv\("` to find the mentions in Lix code.
- `NIX_PROFILE` - Selects which profile `nix-env` will operate on. Documented elsewhere.
- `NIX_SSHOPTS` - Options passed to `ssh(1)` when using a ssh remote store.
Incorrectly documented on `nix-copy-closure` which is *surely* not the only place they are used??
- `_NIX_TEST_NO_LSOF` - Used on non-Linux, non-macOS platforms to disable using `lsof` when finding gc roots.
Since https://git.lix.systems/lix-project/lix/issues/156 was fixed, this should probably just be removed as it was a bad workaround for a macOS issue.
- `_NIX_TEST_GC_SYNC_1` - Path to a pipe that is used to block the GC briefly to validate invariants from the test suite.
- `_NIX_TEST_GC_SYNC_2` - Path to a pipe that is used to block the GC briefly to validate invariants from the test suite.
- `_NIX_TEST_FREE_SPACE_FILE` - Path to a file containing a decimal number with the free space that the GC is to believe it has.

28
src/libstore/gc.cc
View file

@ -321,22 +321,20 @@ Roots LocalStore::findRoots(bool censor)
void LocalStore::findPlatformRoots(UncheckedRoots & unchecked)
{
// lsof is really slow on OS X. This actually causes the gc-concurrent.sh test to fail.
// See: https://github.com/NixOS/nix/issues/3011
// Because of this we disable lsof when running the tests.
if (getEnv("_NIX_TEST_NO_LSOF") != "1") {
try {
std::regex lsofRegex(R"(^n(/.*)$)");
auto lsofLines =
tokenizeString<std::vector<std::string>>(runProgram(LSOF, true, { "-n", "-w", "-F", "n" }), "\n");
for (const auto & line : lsofLines) {
std::smatch match;
if (std::regex_match(line, match, lsofRegex))
unchecked[match[1]].emplace("{lsof}");
}
} catch (ExecError & e) {
/* lsof not installed, lsof failed */
// N.B. This is (read: undertested!) fallback code only used for
// non-Darwin, non-Linux platforms. Both major platforms have
// platform-specific code in src/libstore/platform/
try {
std::regex lsofRegex(R"(^n(/.*)$)");
auto lsofLines =
tokenizeString<std::vector<std::string>>(runProgram(LSOF, true, { "-n", "-w", "-F", "n" }), "\n");
for (const auto & line : lsofLines) {
std::smatch match;
if (std::regex_match(line, match, lsofRegex))
unchecked[match[1]].emplace("{lsof}");
}
} catch (ExecError & e) {
/* lsof not installed, lsof failed */
}
}