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std.Build.Watch: gracefully handle fanotify queue overflow

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Andrew Kelley 2024-07-09 20:26:16 -07:00
parent e712ca595f
commit 956f1ebc70
1 changed files with 16 additions and 0 deletions
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16
lib/std/Build/Watch.zig
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@ -135,6 +135,12 @@ pub fn markDirtySteps(w: *Watch, gpa: Allocator) !bool {
meta = @ptrCast(@as([*]u8, @ptrCast(meta)) + meta[0].event_len);
}) {
assert(meta[0].vers == M.VERSION);
if (meta[0].mask.Q_OVERFLOW) {
any_dirty = true;
std.log.warn("file system watch queue overflowed; falling back to fstat", .{});
markAllFilesDirty(w, gpa);
return true;
}
const fid: *align(1) fanotify.event_info_fid = @ptrCast(meta + 1);
switch (fid.hdr.info_type) {
.DFID_NAME => {
@ -171,3 +177,13 @@ pub fn markFailedStepsDirty(gpa: Allocator, all_steps: []const *Step) void {
else => continue,
};
}
fn markAllFilesDirty(w: *Watch, gpa: Allocator) void {
for (w.handle_table.values()) |reaction_set| {
for (reaction_set.values()) |step_set| {
for (step_set.keys()) |step| {
step.recursiveReset(gpa);
}
}
}
}