temporarily enable ci in this branch

All of our runners now define this. When running a CI script locally, this will
not be set, so we default to 0, aka "all available system memory".

.forgejo/workflows/ci.yaml

@@ -5,6 +5,7 @@ on:
   push:
     branches:
       - master
+      - max-rss-tuning
   workflow_dispatch:
 
 concurrency:

build.zig

@@ -91,6 +91,8 @@ pub fn build(b: *std.Build) !void {
     const skip_libc = b.option(bool, "skip-libc", "Main test suite skips tests that link libc") orelse false;
     const skip_single_threaded = b.option(bool, "skip-single-threaded", "Main test suite skips tests that are single-threaded") orelse false;
     const skip_compile_errors = b.option(bool, "skip-compile-errors", "Main test suite skips compile error tests") orelse false;
+    const skip_spirv = b.option(bool, "skip-spirv", "Main test suite skips targets with spirv32/spirv64 architecture") orelse false;
+    const skip_wasm = b.option(bool, "skip-wasm", "Main test suite skips targets with wasm32/wasm64 architecture") orelse false;
     const skip_freebsd = b.option(bool, "skip-freebsd", "Main test suite skips targets with freebsd OS") orelse false;
     const skip_netbsd = b.option(bool, "skip-netbsd", "Main test suite skips targets with netbsd OS") orelse false;
     const skip_windows = b.option(bool, "skip-windows", "Main test suite skips targets with windows OS") orelse false;
@@ -421,6 +423,8 @@ pub fn build(b: *std.Build) !void {
         .test_target_filters = test_target_filters,
         .skip_compile_errors = skip_compile_errors,
         .skip_non_native = skip_non_native,
+        .skip_spirv = skip_spirv,
+        .skip_wasm = skip_wasm,
         .skip_freebsd = skip_freebsd,
         .skip_netbsd = skip_netbsd,
         .skip_windows = skip_windows,
@@ -452,6 +456,8 @@ pub fn build(b: *std.Build) !void {
         .skip_single_threaded = skip_single_threaded,
         .skip_non_native = skip_non_native,
         .test_default_only = no_matrix,
+        .skip_spirv = skip_spirv,
+        .skip_wasm = skip_wasm,
         .skip_freebsd = skip_freebsd,
         .skip_netbsd = skip_netbsd,
         .skip_windows = skip_windows,
@@ -459,8 +465,29 @@ pub fn build(b: *std.Build) !void {
         .skip_linux = skip_linux,
         .skip_llvm = skip_llvm,
         .skip_libc = skip_libc,
-        // 3888779264 was observed on an x86_64-linux-gnu host.
+        .max_rss = switch (b.graph.host.result.os.tag) {
-        .max_rss = 4000000000,
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 1_060_217_241,
+                else => 1_100_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 659_809_075,
+                .loongarch64 => 598_902_374,
+                .riscv64 => 731_258_880,
+                .s390x => 580_596_121,
+                .x86_64 => 3_290_894_745,
+                else => 3_300_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 767_736_217,
+                else => 800_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 603_070_054,
+                else => 700_000_000,
+            },
+            else => 3_300_000_000,
+        },
     }));
 
     test_modules_step.dependOn(tests.addModuleTests(b, .{
@@ -475,6 +502,8 @@ pub fn build(b: *std.Build) !void {
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .test_default_only = no_matrix,
+        .skip_spirv = skip_spirv,
+        .skip_wasm = skip_wasm,
         .skip_freebsd = skip_freebsd,
         .skip_netbsd = skip_netbsd,
         .skip_windows = skip_windows,
@@ -483,6 +512,29 @@ pub fn build(b: *std.Build) !void {
         .skip_llvm = skip_llvm,
         .skip_libc = true,
         .no_builtin = true,
+        .max_rss = switch (b.graph.host.result.os.tag) {
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 743_802_470,
+                else => 800_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 639_565_414,
+                .loongarch64 => 598_884_352,
+                .riscv64 => 636_429_516,
+                .s390x => 574_166_630,
+                .x86_64 => 764_861_644,
+                else => 800_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 701_413_785,
+                else => 800_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 536_414_208,
+                else => 600_000_000,
+            },
+            else => 1_100_000_000,
+        },
     }));
 
     test_modules_step.dependOn(tests.addModuleTests(b, .{
@@ -497,6 +549,8 @@ pub fn build(b: *std.Build) !void {
         .skip_single_threaded = true,
         .skip_non_native = skip_non_native,
         .test_default_only = no_matrix,
+        .skip_spirv = skip_spirv,
+        .skip_wasm = skip_wasm,
         .skip_freebsd = skip_freebsd,
         .skip_netbsd = skip_netbsd,
         .skip_windows = skip_windows,
@@ -505,6 +559,29 @@ pub fn build(b: *std.Build) !void {
         .skip_llvm = skip_llvm,
         .skip_libc = true,
         .no_builtin = true,
+        .max_rss = switch (b.graph.host.result.os.tag) {
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 557_892_403,
+                else => 600_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 615_302_758,
+                .loongarch64 => 598_974_464,
+                .riscv64 => 382_786_764,
+                .s390x => 395_555_635,
+                .x86_64 => 692_348_518,
+                else => 700_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 451_389_030,
+                else => 500_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 367_747_072,
+                else => 400_000_000,
+            },
+            else => 700_000_000,
+        },
     }));
 
     test_modules_step.dependOn(tests.addModuleTests(b, .{
@@ -519,6 +596,8 @@ pub fn build(b: *std.Build) !void {
         .skip_single_threaded = skip_single_threaded,
         .skip_non_native = skip_non_native,
         .test_default_only = no_matrix,
+        .skip_spirv = skip_spirv,
+        .skip_wasm = skip_wasm,
         .skip_freebsd = skip_freebsd,
         .skip_netbsd = skip_netbsd,
         .skip_windows = skip_windows,
@@ -526,8 +605,29 @@ pub fn build(b: *std.Build) !void {
         .skip_linux = skip_linux,
         .skip_llvm = skip_llvm,
         .skip_libc = skip_libc,
-        // I observed a value of 5605064704 on the M2 CI.
+        .max_rss = switch (b.graph.host.result.os.tag) {
-        .max_rss = 6165571174,
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 3_756_422_348,
+                else => 3_800_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 6_732_817_203,
+                .loongarch64 => 3_216_349_593,
+                .riscv64 => 3_570_899_763,
+                .s390x => 3_652_514_201,
+                .x86_64 => 3_249_546_854,
+                else => 6_800_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 8_273_795_481,
+                else => 8_300_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 3_750_236_160,
+                else => 3_800_000_000,
+            },
+            else => 8_300_000_000,
+        },
     }));
 
     const unit_tests_step = b.step("test-unit", "Run the compiler source unit tests");
@@ -543,6 +643,29 @@ pub fn build(b: *std.Build) !void {
         .use_llvm = use_llvm,
         .use_lld = use_llvm,
         .zig_lib_dir = b.path("lib"),
+        .max_rss = switch (b.graph.host.result.os.tag) {
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 2_188_099_584,
+                else => 2_200_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 1_991_934_771,
+                .loongarch64 => 1_844_538_572,
+                .riscv64 => 2_459_003_289,
+                .s390x => 1_781_248_409,
+                .x86_64 => 977_192_550,
+                else => 2_500_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 2_062_393_344,
+                else => 2_100_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 1_953_087_488,
+                else => 2_000_000_000,
+            },
+            else => 2_200_000_000,
+        },
     });
     if (link_libc) {
         unit_tests.root_module.link_libc = true;
@@ -560,6 +683,7 @@ pub fn build(b: *std.Build) !void {
     test_step.dependOn(tests.addCAbiTests(b, .{
         .test_target_filters = test_target_filters,
         .skip_non_native = skip_non_native,
+        .skip_wasm = skip_wasm,
         .skip_freebsd = skip_freebsd,
         .skip_netbsd = skip_netbsd,
         .skip_windows = skip_windows,
@@ -567,6 +691,29 @@ pub fn build(b: *std.Build) !void {
         .skip_linux = skip_linux,
         .skip_llvm = skip_llvm,
         .skip_release = skip_release,
+        .max_rss = switch (b.graph.host.result.os.tag) {
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 566_218_752,
+                else => 600_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 1_318_185_369,
+                .loongarch64 => 1_422_904_524,
+                .riscv64 => 449_924_710,
+                .s390x => 1_946_743_603,
+                .x86_64 => 2_139_993_292,
+                else => 2_200_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 1_813_612_134,
+                else => 1_900_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 386_287_616,
+                else => 400_000_000,
+            },
+            else => 2_200_000_000,
+        },
     }));
     test_step.dependOn(tests.addLinkTests(b, enable_macos_sdk, enable_ios_sdk, enable_symlinks_windows));
     test_step.dependOn(tests.addStackTraceTests(b, test_filters, skip_non_native));
@@ -616,6 +763,7 @@ pub fn build(b: *std.Build) !void {
         .optimize_modes = optimization_modes,
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
+        .skip_wasm = skip_wasm,
         // Highest RSS observed in any test case was exactly 1802878976 on x86_64-linux.
         .max_rss = 2253598720,
     })) |test_libc_step| test_step.dependOn(test_libc_step);
@@ -721,7 +869,29 @@ fn addCompilerMod(b: *std.Build, options: AddCompilerModOptions) *std.Build.Modu
 fn addCompilerStep(b: *std.Build, options: AddCompilerModOptions) *std.Build.Step.Compile {
     const exe = b.addExecutable(.{
         .name = "zig",
-        .max_rss = 7_800_000_000,
+        .max_rss = switch (b.graph.host.result.os.tag) {
+            .freebsd => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 6_044_158_771,
+                else => 6_100_000_000,
+            },
+            .linux => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 6_240_805_683,
+                .loongarch64 => 5_024_158_515,
+                .riscv64 => 6_996_309_196,
+                .s390x => 4_997_174_476,
+                .x86_64 => 5_486_090_649,
+                else => 7_000_000_000,
+            },
+            .macos => switch (b.graph.host.result.cpu.arch) {
+                .aarch64 => 6_639_145_779,
+                else => 6_700_000_000,
+            },
+            .windows => switch (b.graph.host.result.cpu.arch) {
+                .x86_64 => 5_770_394_009,
+                else => 5_800_000_000,
+            },
+            else => 7_000_000_000,
+        },
         .root_module = addCompilerMod(b, options),
     });
     exe.stack_size = stack_size;
@@ -798,7 +968,7 @@ fn addCmakeCfgOptionsToExe(
                 };
                 mod.linkSystemLibrary("unwind", .{});
             },
-            .ios, .macos, .watchos, .tvos, .visionos => {
+            .driverkit, .ios, .maccatalyst, .macos, .tvos, .visionos, .watchos => {
                 mod.link_libcpp = true;
             },
             .windows => {

ci/aarch64-linux-debug.sh

@@ -44,7 +44,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-debug/bin/zig build test docs \
-  --maxrss 44918199637 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dtarget=native-native-musl \

ci/aarch64-linux-release.sh

@@ -44,7 +44,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-release/bin/zig build test docs \
-  --maxrss 44918199637 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dtarget=native-native-musl \

ci/aarch64-macos-debug.sh

@@ -42,6 +42,7 @@ cmake .. \
 ninja install
 
 stage3-debug/bin/zig build test docs \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   --zig-lib-dir "$PWD/../lib" \
   -Denable-macos-sdk \
   -Dstatic-llvm \

ci/aarch64-macos-release.sh

@@ -51,6 +51,7 @@ stage3-release/bin/zig build test docs \
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
 stage3-release/bin/zig build \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   --prefix stage4-release \
   -Denable-llvm \
   -Dno-lib \

ci/aarch64-windows.ps1

@@ -5,6 +5,7 @@ $ZIG_LLVM_CLANG_LLD_URL = "https://ziglang.org/deps/$ZIG_LLVM_CLANG_LLD_NAME.zip
 $PREFIX_PATH = "$(Get-Location)\..\$ZIG_LLVM_CLANG_LLD_NAME"
 $ZIG = "$PREFIX_PATH\bin\zig.exe"
 $ZIG_LIB_DIR = "$(Get-Location)\lib"
+$ZSF_MAX_RSS = if ($Env:ZSF_MAX_RSS) { $Env:ZSF_MAX_RSS } else { 0 }
 
 if (!(Test-Path "..\$ZIG_LLVM_CLANG_LLD_NAME.zip")) {
     Write-Output "Downloading $ZIG_LLVM_CLANG_LLD_URL"
@@ -54,6 +55,7 @@ CheckLastExitCode
 
 Write-Output "Main test suite..."
 & "stage3-release\bin\zig.exe" build test docs `
+  --maxrss $ZSF_MAX_RSS `
   --zig-lib-dir "$ZIG_LIB_DIR" `
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `

ci/loongarch64-linux-debug.sh

@@ -45,7 +45,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-debug/bin/zig build test docs \
-  --maxrss 60129542144 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dtarget=native-native-musl \

ci/loongarch64-linux-release.sh

@@ -45,7 +45,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-release/bin/zig build test docs \
-  --maxrss 60129542144 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dtarget=native-native-musl \

ci/riscv64-linux-debug.sh

@@ -44,7 +44,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-debug/bin/zig build test-cases test-modules test-unit test-c-abi test-stack-traces test-error-traces test-llvm-ir \
-  --maxrss 68719476736 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dskip-single-threaded \

ci/riscv64-linux-release.sh

@@ -44,7 +44,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-release/bin/zig build test-cases test-modules test-unit test-c-abi test-stack-traces test-error-traces test-llvm-ir \
-  --maxrss 68719476736 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dskip-single-threaded \

ci/s390x-linux-debug.sh

@@ -45,7 +45,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-debug/bin/zig build test docs \
-  --maxrss 30064771072 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dtarget=native-native-musl \

ci/s390x-linux-release.sh

@@ -45,7 +45,7 @@ ninja install
 
 # No -fqemu and -fwasmtime here as they're covered by the x86_64-linux scripts.
 stage3-release/bin/zig build test docs \
-  --maxrss 30064771072 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
   -Dskip-non-native \
   -Dtarget=native-native-musl \

ci/x86_64-freebsd-debug.sh

@@ -44,8 +44,10 @@ unset CXX
 ninja install
 
 stage3-debug/bin/zig build test docs \
-  --maxrss 42949672960 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
+  -Dskip-spirv \
+  -Dskip-wasm \
   -Dskip-linux \
   -Dskip-netbsd \
   -Dskip-windows \

ci/x86_64-freebsd-release.sh

@@ -44,8 +44,10 @@ unset CXX
 ninja install
 
 stage3-release/bin/zig build test docs \
-  --maxrss 42949672960 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dstatic-llvm \
+  -Dskip-spirv \
+  -Dskip-wasm \
   -Dskip-linux \
   -Dskip-netbsd \
   -Dskip-windows \

ci/x86_64-linux-debug-llvm.sh

@@ -49,7 +49,7 @@ stage3-debug/bin/zig build \
   -Dno-lib
 
 stage3-debug/bin/zig build test docs \
-  --maxrss 21000000000 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dlldb=$HOME/deps/lldb-zig/Debug-e0a42bb34/bin/lldb \
   -fqemu \
   -fwasmtime \

ci/x86_64-linux-debug.sh

@@ -48,7 +48,7 @@ stage3-debug/bin/zig build \
   -Dno-lib
 
 stage3-debug/bin/zig build test docs \
-  --maxrss 21000000000 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dlldb=$HOME/deps/lldb-zig/Debug-e0a42bb34/bin/lldb \
   -fqemu \
   -fwasmtime \

ci/x86_64-linux-release.sh

@@ -54,7 +54,7 @@ stage3-release/bin/zig build \
   -Dno-lib
 
 stage3-release/bin/zig build test docs \
-  --maxrss 21000000000 \
+  --maxrss ${ZSF_MAX_RSS:-0} \
   -Dlldb=$HOME/deps/lldb-zig/Release-e0a42bb34/bin/lldb \
   -fqemu \
   -fwasmtime \

ci/x86_64-windows-debug.ps1

@@ -5,6 +5,7 @@ $ZIG_LLVM_CLANG_LLD_URL = "https://ziglang.org/deps/$ZIG_LLVM_CLANG_LLD_NAME.zip
 $PREFIX_PATH = "$($Env:USERPROFILE)\$ZIG_LLVM_CLANG_LLD_NAME"
 $ZIG = "$PREFIX_PATH\bin\zig.exe"
 $ZIG_LIB_DIR = "$(Get-Location)\lib"
+$ZSF_MAX_RSS = if ($Env:ZSF_MAX_RSS) { $Env:ZSF_MAX_RSS } else { 0 }
 
 if (!(Test-Path "$PREFIX_PATH.zip")) {
     Write-Output "Downloading $ZIG_LLVM_CLANG_LLD_URL"
@@ -54,12 +55,11 @@ CheckLastExitCode
 
 Write-Output "Main test suite..."
 & "stage3-debug\bin\zig.exe" build test docs `
-  --maxrss 32212254720 `
+  --maxrss $ZSF_MAX_RSS `
   --zig-lib-dir "$ZIG_LIB_DIR" `
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `
   -Dskip-non-native `
-  -Dskip-release `
   -Dskip-test-incremental `
   -Denable-symlinks-windows `
   --test-timeout 30m

ci/x86_64-windows-release.ps1

@@ -5,6 +5,7 @@ $ZIG_LLVM_CLANG_LLD_URL = "https://ziglang.org/deps/$ZIG_LLVM_CLANG_LLD_NAME.zip
 $PREFIX_PATH = "$($Env:USERPROFILE)\$ZIG_LLVM_CLANG_LLD_NAME"
 $ZIG = "$PREFIX_PATH\bin\zig.exe"
 $ZIG_LIB_DIR = "$(Get-Location)\lib"
+$ZSF_MAX_RSS = if ($Env:ZSF_MAX_RSS) { $Env:ZSF_MAX_RSS } else { 0 }
 
 if (!(Test-Path "$PREFIX_PATH.zip")) {
     Write-Output "Downloading $ZIG_LLVM_CLANG_LLD_URL"
@@ -54,7 +55,7 @@ CheckLastExitCode
 
 Write-Output "Main test suite..."
 & "stage3-release\bin\zig.exe" build test docs `
-  --maxrss 32212254720 `
+  --maxrss $ZSF_MAX_RSS `
   --zig-lib-dir "$ZIG_LIB_DIR" `
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `

lib/std/c.zig

@@ -4471,7 +4471,7 @@ pub const rusage = switch (native_os) {
         pub const SELF = 1;
         pub const CHILDREN = 2;
     },
-    .freebsd => extern struct {
+    .freebsd, .openbsd => extern struct {
         utime: timeval,
         stime: timeval,
         maxrss: c_long,
@@ -4493,6 +4493,27 @@ pub const rusage = switch (native_os) {
         pub const CHILDREN = -1;
         pub const THREAD = 1;
     },
+    .dragonfly, .netbsd => extern struct {
+        utime: timeval,
+        stime: timeval,
+        maxrss: c_long,
+        ixrss: c_long,
+        idrss: c_long,
+        isrss: c_long,
+        minflt: c_long,
+        majflt: c_long,
+        nswap: c_long,
+        inblock: c_long,
+        oublock: c_long,
+        msgsnd: c_long,
+        msgrcv: c_long,
+        nsignals: c_long,
+        nvcsw: c_long,
+        nivcsw: c_long,
+
+        pub const SELF = 0;
+        pub const CHILDREN = -1;
+    },
     else => void,
 };
 

lib/std/crypto/argon2.zig

@@ -7,12 +7,11 @@ const builtin = @import("builtin");
 
 const blake2 = crypto.hash.blake2;
 const crypto = std.crypto;
+const Io = std.Io;
 const math = std.math;
 const mem = std.mem;
 const phc_format = pwhash.phc_format;
 const pwhash = crypto.pwhash;
-
-const Thread = std.Thread;
 const Blake2b512 = blake2.Blake2b512;
 const Blocks = std.array_list.AlignedManaged([block_length]u64, .@"16");
 const H0 = [Blake2b512.digest_length + 8]u8;
@@ -204,20 +203,20 @@ fn initBlocks(
 }
 
 fn processBlocks(
-    allocator: mem.Allocator,
     blocks: *Blocks,
     time: u32,
     memory: u32,
     threads: u24,
     mode: Mode,
-) KdfError!void {
+    io: Io,
+) void {
     const lanes = memory / threads;
     const segments = lanes / sync_points;
 
     if (builtin.single_threaded or threads == 1) {
         processBlocksSt(blocks, time, memory, threads, mode, lanes, segments);
     } else {
-        try processBlocksMt(allocator, blocks, time, memory, threads, mode, lanes, segments);
+        processBlocksMt(blocks, time, memory, threads, mode, lanes, segments, io);
     }
 }
 
@@ -243,7 +242,6 @@ fn processBlocksSt(
 }
 
 fn processBlocksMt(
-    allocator: mem.Allocator,
     blocks: *Blocks,
     time: u32,
     memory: u32,
@@ -251,26 +249,20 @@ fn processBlocksMt(
     mode: Mode,
     lanes: u32,
     segments: u32,
-) KdfError!void {
+    io: Io,
-    var threads_list = try std.array_list.Managed(Thread).initCapacity(allocator, threads);
+) void {
-    defer threads_list.deinit();
-
     var n: u32 = 0;
     while (n < time) : (n += 1) {
         var slice: u32 = 0;
         while (slice < sync_points) : (slice += 1) {
+            var group: Io.Group = .init;
             var lane: u24 = 0;
             while (lane < threads) : (lane += 1) {
-                const thread = try Thread.spawn(.{}, processSegment, .{
+                group.async(io, processSegment, .{
                     blocks, time, memory, threads, mode, lanes, segments, n, slice, lane,
                 });
-                threads_list.appendAssumeCapacity(thread);
             }
-            lane = 0;
+            group.wait(io);
-            while (lane < threads) : (lane += 1) {
-                threads_list.items[lane].join();
-            }
-            threads_list.clearRetainingCapacity();
         }
     }
 }
@@ -489,6 +481,7 @@ pub fn kdf(
     salt: []const u8,
     params: Params,
     mode: Mode,
+    io: Io,
 ) KdfError!void {
     if (derived_key.len < 4) return KdfError.WeakParameters;
     if (derived_key.len > max_int) return KdfError.OutputTooLong;
@@ -510,7 +503,7 @@ pub fn kdf(
     blocks.appendNTimesAssumeCapacity(@splat(0), memory);
 
     initBlocks(&blocks, &h0, memory, params.p);
-    try processBlocks(allocator, &blocks, params.t, memory, params.p, mode);
+    processBlocks(&blocks, params.t, memory, params.p, mode, io);
     finalize(&blocks, memory, params.p, derived_key);
 }
 
@@ -533,6 +526,7 @@ const PhcFormatHasher = struct {
         params: Params,
         mode: Mode,
         buf: []u8,
+        io: Io,
     ) HasherError![]const u8 {
         if (params.secret != null or params.ad != null) return HasherError.InvalidEncoding;
 
@@ -540,7 +534,7 @@ const PhcFormatHasher = struct {
         crypto.random.bytes(&salt);
 
         var hash: [default_hash_len]u8 = undefined;
-        try kdf(allocator, &hash, password, &salt, params, mode);
+        try kdf(allocator, &hash, password, &salt, params, mode, io);
 
         return phc_format.serialize(HashResult{
             .alg_id = @tagName(mode),
@@ -557,6 +551,7 @@ const PhcFormatHasher = struct {
         allocator: mem.Allocator,
         str: []const u8,
         password: []const u8,
+        io: Io,
     ) HasherError!void {
         const hash_result = try phc_format.deserialize(HashResult, str);
 
@@ -572,7 +567,7 @@ const PhcFormatHasher = struct {
         if (expected_hash.len > hash_buf.len) return HasherError.InvalidEncoding;
         const hash = hash_buf[0..expected_hash.len];
 
-        try kdf(allocator, hash, password, hash_result.salt.constSlice(), params, mode);
+        try kdf(allocator, hash, password, hash_result.salt.constSlice(), params, mode, io);
         if (!mem.eql(u8, hash, expected_hash)) return HasherError.PasswordVerificationFailed;
     }
 };
@@ -595,6 +590,7 @@ pub fn strHash(
     password: []const u8,
     options: HashOptions,
     out: []u8,
+    io: Io,
 ) Error![]const u8 {
     const allocator = options.allocator orelse return Error.AllocatorRequired;
     switch (options.encoding) {
@@ -604,6 +600,7 @@ pub fn strHash(
             options.params,
             options.mode,
             out,
+            io,
         ),
         .crypt => return Error.InvalidEncoding,
     }
@@ -621,9 +618,10 @@ pub fn strVerify(
     str: []const u8,
     password: []const u8,
     options: VerifyOptions,
+    io: Io,
 ) Error!void {
     const allocator = options.allocator orelse return Error.AllocatorRequired;
-    return PhcFormatHasher.verify(allocator, str, password);
+    return PhcFormatHasher.verify(allocator, str, password, io);
 }
 
 test "argon2d" {
@@ -640,6 +638,7 @@ test "argon2d" {
         &salt,
         .{ .t = 3, .m = 32, .p = 4, .secret = &secret, .ad = &ad },
         .argon2d,
+        std.testing.io,
     );
 
     const want = [_]u8{
@@ -665,6 +664,7 @@ test "argon2i" {
         &salt,
         .{ .t = 3, .m = 32, .p = 4, .secret = &secret, .ad = &ad },
         .argon2i,
+        std.testing.io,
     );
 
     const want = [_]u8{
@@ -690,6 +690,7 @@ test "argon2id" {
         &salt,
         .{ .t = 3, .m = 32, .p = 4, .secret = &secret, .ad = &ad },
         .argon2id,
+        std.testing.io,
     );
 
     const want = [_]u8{
@@ -800,44 +801,44 @@ test "kdf" {
         .{
             .mode = .argon2i,
             .time = 4,
-            .memory = 4096,
+            .memory = 256,
             .threads = 4,
-            .hash = "a11f7b7f3f93f02ad4bddb59ab62d121e278369288a0d0e7",
+            .hash = "f7dbbacbf16999e3700817a7e06f65a8db2e9fa9504ede4c",
         },
         .{
             .mode = .argon2d,
             .time = 4,
-            .memory = 4096,
+            .memory = 256,
             .threads = 4,
-            .hash = "935598181aa8dc2b720914aa6435ac8d3e3a4210c5b0fb2d",
+            .hash = "ea2970501cf49faa5ba1d2e6370204e9b57ca90a8fea937b",
         },
         .{
             .mode = .argon2id,
             .time = 4,
-            .memory = 4096,
+            .memory = 256,
             .threads = 4,
-            .hash = "145db9733a9f4ee43edf33c509be96b934d505a4efb33c5a",
+            .hash = "fbd40d5a8cb92f88c20bda4b3cdb1f9d5af1efa937032410",
         },
         .{
             .mode = .argon2i,
             .time = 4,
-            .memory = 1024,
+            .memory = 256,
             .threads = 8,
-            .hash = "0cdd3956aa35e6b475a7b0c63488822f774f15b43f6e6e17",
+            .hash = "15d3c398364e53f68fd12d19baf3f21432d964254fe27467",
         },
         .{
             .mode = .argon2d,
             .time = 4,
-            .memory = 1024,
+            .memory = 256,
             .threads = 8,
-            .hash = "83604fc2ad0589b9d055578f4d3cc55bc616df3578a896e9",
+            .hash = "23c9adc06f06e21e4612c1466a1be02627690932b02c0df0",
         },
         .{
             .mode = .argon2id,
             .time = 4,
-            .memory = 1024,
+            .memory = 256,
             .threads = 8,
-            .hash = "8dafa8e004f8ea96bf7c0f93eecf67a6047476143d15577f",
+            .hash = "f22802f8ca47be93f9954e4ce20c1e944e938fbd4a125d9d",
         },
         .{
             .mode = .argon2i,
@@ -863,23 +864,23 @@ test "kdf" {
         .{
             .mode = .argon2i,
             .time = 3,
-            .memory = 1024,
+            .memory = 256,
             .threads = 6,
-            .hash = "d236b29c2b2a09babee842b0dec6aa1e83ccbdea8023dced",
+            .hash = "ebc8f91964abd8ceab49a12963b0a9e57d635bfa2aad2884",
         },
         .{
             .mode = .argon2d,
             .time = 3,
-            .memory = 1024,
+            .memory = 256,
             .threads = 6,
-            .hash = "a3351b0319a53229152023d9206902f4ef59661cdca89481",
+            .hash = "1dd7202fd68da6675f769f4034b7a1db30d8785331954117",
         },
         .{
             .mode = .argon2id,
             .time = 3,
-            .memory = 1024,
+            .memory = 256,
             .threads = 6,
-            .hash = "1640b932f4b60e272f5d2207b9a9c626ffa1bd88d2349016",
+            .hash = "424436b6ee22a66b04b9d0cf78f190305c5c166bae8baa09",
         },
     };
     for (test_vectors) |v| {
@@ -894,6 +895,7 @@ test "kdf" {
             salt,
             .{ .t = v.time, .m = v.memory, .p = v.threads },
             v.mode,
+            std.testing.io,
         );
 
         try std.testing.expectEqualSlices(u8, &dk, &want);
@@ -903,6 +905,7 @@ test "kdf" {
 test "phc format hasher" {
     const allocator = std.testing.allocator;
     const password = "testpass";
+    const io = std.testing.io;
 
     var buf: [128]u8 = undefined;
     const hash = try PhcFormatHasher.create(
@@ -911,25 +914,29 @@ test "phc format hasher" {
         .{ .t = 3, .m = 32, .p = 4 },
         .argon2id,
         &buf,
+        io,
     );
-    try PhcFormatHasher.verify(allocator, hash, password);
+    try PhcFormatHasher.verify(allocator, hash, password, io);
 }
 
 test "password hash and password verify" {
     const allocator = std.testing.allocator;
     const password = "testpass";
+    const io = std.testing.io;
 
     var buf: [128]u8 = undefined;
     const hash = try strHash(
         password,
         .{ .allocator = allocator, .params = .{ .t = 3, .m = 32, .p = 4 } },
         &buf,
+        io,
     );
-    try strVerify(hash, password, .{ .allocator = allocator });
+    try strVerify(hash, password, .{ .allocator = allocator }, io);
 }
 
 test "kdf derived key length" {
     const allocator = std.testing.allocator;
+    const io = std.testing.io;
 
     const password = "testpass";
     const salt = "saltsalt";
@@ -937,11 +944,11 @@ test "kdf derived key length" {
     const mode = Mode.argon2id;
 
     var dk1: [11]u8 = undefined;
-    try kdf(allocator, &dk1, password, salt, params, mode);
+    try kdf(allocator, &dk1, password, salt, params, mode, io);
 
     var dk2: [77]u8 = undefined;
-    try kdf(allocator, &dk2, password, salt, params, mode);
+    try kdf(allocator, &dk2, password, salt, params, mode, io);
 
     var dk3: [111]u8 = undefined;
-    try kdf(allocator, &dk3, password, salt, params, mode);
+    try kdf(allocator, &dk3, password, salt, params, mode, io);
 }

lib/std/crypto/benchmark.zig

@@ -450,6 +450,7 @@ fn benchmarkPwhash(
     comptime ty: anytype,
     comptime params: *const anyopaque,
     comptime count: comptime_int,
+    io: std.Io,
 ) !f64 {
     const password = "testpass" ** 2;
     const opts = ty.HashOptions{
@@ -459,12 +460,20 @@ fn benchmarkPwhash(
     };
     var buf: [256]u8 = undefined;
 
+    const strHash = ty.strHash;
+    const strHashFnInfo = @typeInfo(@TypeOf(strHash)).@"fn";
+    const needs_io = strHashFnInfo.params.len == 4;
+
     var timer = try Timer.start();
     const start = timer.lap();
     {
         var i: usize = 0;
         while (i < count) : (i += 1) {
-            _ = try ty.strHash(password, opts, &buf);
+            if (needs_io) {
+                _ = try strHash(password, opts, &buf, io);
+            } else {
+                _ = try strHash(password, opts, &buf);
+            }
             mem.doNotOptimizeAway(&buf);
         }
     }
@@ -623,7 +632,7 @@ pub fn main() !void {
 
     inline for (pwhashes) |H| {
         if (filter == null or std.mem.indexOf(u8, H.name, filter.?) != null) {
-            const throughput = try benchmarkPwhash(arena_allocator, H.ty, H.params, mode(64));
+            const throughput = try benchmarkPwhash(arena_allocator, H.ty, H.params, mode(64), io);
             try stdout.print("{s:>17}: {d:10.3} s/ops\n", .{ H.name, throughput });
             try stdout.flush();
         }

lib/std/process.zig

@@ -690,6 +690,9 @@ pub const ArgIteratorWasi = struct {
 
     /// Call to free the internal buffer of the iterator.
     pub fn deinit(self: *ArgIteratorWasi) void {
+        // Nothing is allocated when there are no args
+        if (self.args.len == 0) return;
+
         const last_item = self.args[self.args.len - 1];
         const last_byte_addr = @intFromPtr(last_item.ptr) + last_item.len + 1; // null terminated
         const first_item_ptr = self.args[0].ptr;

lib/std/process/Child.zig

@@ -122,7 +122,7 @@ pub const ResourceUsageStatistics = struct {
     /// if available.
     pub inline fn getMaxRss(rus: ResourceUsageStatistics) ?usize {
         switch (native_os) {
-            .linux => {
+            .dragonfly, .freebsd, .netbsd, .openbsd, .illumos, .linux, .serenity => {
                 if (rus.rusage) |ru| {
                     return @as(usize, @intCast(ru.maxrss)) * 1024;
                 } else {
@@ -149,7 +149,21 @@ pub const ResourceUsageStatistics = struct {
     }
 
     const rusage_init = switch (native_os) {
-        .linux, .driverkit, .ios, .maccatalyst, .macos, .tvos, .visionos, .watchos => @as(?posix.rusage, null),
+        .dragonfly,
+        .freebsd,
+        .netbsd,
+        .openbsd,
+        .illumos,
+        .linux,
+        .serenity,
+        .driverkit,
+        .ios,
+        .maccatalyst,
+        .macos,
+        .tvos,
+        .visionos,
+        .watchos,
+        => @as(?posix.rusage, null),
         .windows => @as(?windows.VM_COUNTERS, null),
         else => {},
     };
@@ -486,7 +500,21 @@ fn waitUnwrappedPosix(self: *ChildProcess) void {
     const res: posix.WaitPidResult = res: {
         if (self.request_resource_usage_statistics) {
             switch (native_os) {
-                .linux, .driverkit, .ios, .maccatalyst, .macos, .tvos, .visionos, .watchos => {
+                .dragonfly,
+                .freebsd,
+                .netbsd,
+                .openbsd,
+                .illumos,
+                .linux,
+                .serenity,
+                .driverkit,
+                .ios,
+                .maccatalyst,
+                .macos,
+                .tvos,
+                .visionos,
+                .watchos,
+                => {
                     var ru: posix.rusage = undefined;
                     const res = posix.wait4(self.id, 0, &ru);
                     self.resource_usage_statistics.rusage = ru;

test/src/Cases.zig

@@ -444,6 +444,8 @@ pub const CaseTestOptions = struct {
     test_target_filters: []const []const u8,
     skip_compile_errors: bool,
     skip_non_native: bool,
+    skip_spirv: bool,
+    skip_wasm: bool,
     skip_freebsd: bool,
     skip_netbsd: bool,
     skip_windows: bool,
@@ -472,6 +474,9 @@ pub fn lowerToBuildSteps(
         if (options.skip_non_native and !case.target.query.isNative())
             continue;
 
+        if (options.skip_spirv and case.target.query.cpu_arch != null and case.target.query.cpu_arch.?.isSpirV()) continue;
+        if (options.skip_wasm and case.target.query.cpu_arch != null and case.target.query.cpu_arch.?.isWasm()) continue;
+
         if (options.skip_freebsd and case.target.query.os_tag == .freebsd) continue;
         if (options.skip_netbsd and case.target.query.os_tag == .netbsd) continue;
         if (options.skip_windows and case.target.query.os_tag == .windows) continue;

test/src/Libc.zig

@@ -10,6 +10,7 @@ pub const Options = struct {
     optimize_modes: []const std.builtin.OptimizeMode,
     test_filters: []const []const u8,
     test_target_filters: []const []const u8,
+    skip_wasm: bool,
     max_rss: usize,
 };
 
@@ -41,6 +42,8 @@ pub fn addLibcTestCase(
 }
 
 pub fn addTarget(libc: *const Libc, target: std.Build.ResolvedTarget) void {
+    if (libc.options.skip_wasm and target.query.cpu_arch != null and target.query.cpu_arch.?.isWasm()) return;
+
     if (libc.options.test_target_filters.len > 0) {
         const triple_txt = target.query.zigTriple(libc.b.allocator) catch @panic("OOM");
         for (libc.options.test_target_filters) |filter| {

test/tests.zig

@@ -2246,6 +2246,8 @@ const ModuleTestOptions = struct {
     test_default_only: bool,
     skip_single_threaded: bool,
     skip_non_native: bool,
+    skip_spirv: bool,
+    skip_wasm: bool,
     skip_freebsd: bool,
     skip_netbsd: bool,
     skip_windows: bool,
@@ -2281,6 +2283,9 @@ pub fn addModuleTests(b: *std.Build, options: ModuleTestOptions) *Step {
         if (options.skip_non_native and !test_target.target.isNative())
             continue;
 
+        if (options.skip_spirv and test_target.target.cpu_arch != null and test_target.target.cpu_arch.?.isSpirV()) continue;
+        if (options.skip_wasm and test_target.target.cpu_arch != null and test_target.target.cpu_arch.?.isWasm()) continue;
+
         if (options.skip_freebsd and test_target.target.os_tag == .freebsd) continue;
         if (options.skip_netbsd and test_target.target.os_tag == .netbsd) continue;
         if (options.skip_windows and test_target.target.os_tag == .windows) continue;
@@ -2339,8 +2344,11 @@ fn addOneModuleTest(
     const libc_suffix = if (test_target.link_libc == true) "-libc" else "";
     const model_txt = target.cpu.model.name;
 
-    // wasm32-wasi builds need more RAM, idk why
+    // These emulated targets need a lot more RAM for unknown reasons.
-    const max_rss = if (target.os.tag == .wasi)
+    const max_rss = if (mem.eql(u8, options.name, "std") and
+        (target.cpu.arch == .hexagon or
+            (target.cpu.arch.isRISCV() and !resolved_target.query.isNative()) or
+            target.cpu.arch.isWasm()))
         options.max_rss * 2
     else
         options.max_rss;
@@ -2519,6 +2527,7 @@ pub fn wouldUseLlvm(use_llvm: ?bool, query: std.Target.Query, optimize_mode: Opt
 const CAbiTestOptions = struct {
     test_target_filters: []const []const u8,
     skip_non_native: bool,
+    skip_wasm: bool,
     skip_freebsd: bool,
     skip_netbsd: bool,
     skip_windows: bool,
@@ -2526,6 +2535,7 @@ const CAbiTestOptions = struct {
     skip_linux: bool,
     skip_llvm: bool,
     skip_release: bool,
+    max_rss: usize = 0,
 };
 
 pub fn addCAbiTests(b: *std.Build, options: CAbiTestOptions) *Step {
@@ -2538,6 +2548,9 @@ pub fn addCAbiTests(b: *std.Build, options: CAbiTestOptions) *Step {
 
         for (c_abi_targets) |c_abi_target| {
             if (options.skip_non_native and !c_abi_target.target.isNative()) continue;
+
+            if (options.skip_wasm and c_abi_target.target.cpu_arch != null and c_abi_target.target.cpu_arch.?.isWasm()) continue;
+
             if (options.skip_freebsd and c_abi_target.target.os_tag == .freebsd) continue;
             if (options.skip_netbsd and c_abi_target.target.os_tag == .netbsd) continue;
             if (options.skip_windows and c_abi_target.target.os_tag == .windows) continue;
@@ -2595,6 +2608,7 @@ pub fn addCAbiTests(b: *std.Build, options: CAbiTestOptions) *Step {
                 .root_module = test_mod,
                 .use_llvm = c_abi_target.use_llvm,
                 .use_lld = c_abi_target.use_lld,
+                .max_rss = options.max_rss,
             });
 
             // This test is intentionally trying to check if the external ABI is