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build: allow overriding RSS limit for zig binary manually #23254

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build: allow overriding RSS limit for zig binary manually #23254

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5 changes: 4 additions & 1 deletion build.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,7 @@ pub fn build(b: *std.Build) !void {
const pie = b.option(bool, "pie", "Produce a Position Independent Executable");
const value_interpret_mode = b.option(ValueInterpretMode, "value-interpret-mode", "How the compiler translates between 'std.builtin' types and its internal datastructures") orelse .direct;
const value_tracing = b.option(bool, "value-tracing", "Enable extra state tracking to help troubleshoot bugs in the compiler (using the std.debug.Trace API)") orelse false;
const zig_max_rss = b.option(usize, "zig-max-rss", "Limit memory usage for compiling Zig binary");

const mem_leak_frames: u32 = b.option(u32, "mem-leak-frames", "How many stack frames to print when a memory leak occurs. Tests get 2x this amount.") orelse blk: {
if (strip == true) break :blk @as(u32, 0);
Expand All @@ -193,6 +194,7 @@ pub fn build(b: *std.Build) !void {
.valgrind = valgrind,
.sanitize_thread = sanitize_thread,
.single_threaded = single_threaded,
.max_rss = zig_max_rss,
});
exe.pie = pie;
exe.entitlements = entitlements;
Expand Down Expand Up @@ -662,6 +664,7 @@ const AddCompilerStepOptions = struct {
valgrind: ?bool = null,
sanitize_thread: ?bool = null,
single_threaded: ?bool = null,
max_rss: ?usize = null,
};

fn addCompilerStep(b: *std.Build, options: AddCompilerStepOptions) *std.Build.Step.Compile {
Expand Down Expand Up @@ -707,7 +710,7 @@ fn addCompilerStep(b: *std.Build, options: AddCompilerStepOptions) *std.Build.St

const exe = b.addExecutable(.{
.name = "zig",
.max_rss = 7_800_000_000,
.max_rss = options.max_rss orelse 7_800_000_000,
.root_module = compiler_mod,
});
exe.stack_size = stack_size;
Expand Down