Improve isolation, execution limits and execution metrics by using Isolate (#683)

* Initial: use Isolate for isolation

* Continue: use Isolate for isolation

* Bug fixes

* timeout is wall-time for backward compatibility

* Documentation, signal names, reported time in ms

* Report memory usage in bytes

* Add privileged flags where needed

* Remove tmpfs

* Remove tmpfs

* Fix package installation

* Fix path, fix Zig: CRLF -> LF

packages/zig/0.10.1/compile

@@ -1,6 +1,6 @@
-#!/usr/bin/env bash
-
-# optimizing for small programs
-rename 's/$/\.zig/' "$@" # Add .zig extension
-
-zig build-exe -O ReleaseSafe --color off --cache-dir . --global-cache-dir . --name out *.zig
+#!/usr/bin/env bash
+
+# optimizing for small programs
+rename 's/$/\.zig/' "$@" # Add .zig extension
+
+zig build-exe -O ReleaseSafe --color off --cache-dir . --global-cache-dir . --name out *.zig

packages/zig/0.10.1/environment

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
-
-# compiler path
-export PATH=$PWD/bin:$PATH
+#!/usr/bin/env bash
+
+# compiler path
+export PATH=$PWD/bin:$PATH

packages/zig/0.10.1/metadata.json

@@ -1,8 +1,9 @@
-{
-    "language": "zig",
-    "version": "0.10.1",
-    "aliases": [],
-    "limit_overrides": {
-        "compile_timeout": 15000
-    }
-}
+{
+    "language": "zig",
+    "version": "0.10.1",
+    "aliases": [],
+    "limit_overrides": {
+        "compile_timeout": 15000,
+        "compile_cpu_time": 15000
+    }
+}

packages/zig/0.10.1/run

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
-
-shift # Filename is only used in compile step, so we can take it out here
-./out "$@"
+#!/usr/bin/env bash
+
+shift # Filename is only used in compile step, so we can take it out here
+./out "$@"

packages/zig/0.10.1/test.zig

@@ -1,6 +1,6 @@
-const std = @import("std");
-
-pub fn main() !void {
-    const stdout = std.io.getStdOut().writer();
-    try stdout.print("OK\n", .{});
-}
+const std = @import("std");
+
+pub fn main() !void {
+    const stdout = std.io.getStdOut().writer();
+    try stdout.print("OK\n", .{});
+}