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implement safety for resuming non-suspended function

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closes #3469
This commit is contained in:
Andrew Kelley
2019-10-22 23:43:27 -04:00
parent 1dcf540426
commit e98e5dda52
3 changed files with 74 additions and 0 deletions
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48
test/runtime_safety.zig
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@@ -1,6 +1,54 @@
const tests = @import("tests.zig");
pub fn addCases(cases: *tests.CompareOutputContext) void {
cases.addRuntimeSafety("resuming a non-suspended function which never been suspended",
\\pub fn panic(message: []const u8, stack_trace: ?*@import("builtin").StackTrace) noreturn {
\\ @import("std").os.exit(126);
\\}
\\fn foo() void {
\\ var f = async bar(@frame());
\\ @import("std").os.exit(0);
\\}
\\
\\fn bar(frame: anyframe) void {
\\ suspend {
\\ resume frame;
\\ }
\\ @import("std").os.exit(0);
\\}
\\
\\pub fn main() void {
\\ _ = async foo();
\\}
);
cases.addRuntimeSafety("resuming a non-suspended function which has been suspended and resumed",
\\pub fn panic(message: []const u8, stack_trace: ?*@import("builtin").StackTrace) noreturn {
\\ @import("std").os.exit(126);
\\}
\\fn foo() void {
\\ suspend {
\\ global_frame = @frame();
\\ }
\\ var f = async bar(@frame());
\\ @import("std").os.exit(0);
\\}
\\
\\fn bar(frame: anyframe) void {
\\ suspend {
\\ resume frame;
\\ }
\\ @import("std").os.exit(0);
\\}
\\
\\var global_frame: anyframe = undefined;
\\pub fn main() void {
\\ _ = async foo();
\\ resume global_frame;
\\ @import("std").os.exit(0);
\\}
);
cases.addRuntimeSafety("noasync function call, callee suspends",
\\pub fn panic(message: []const u8, stack_trace: ?*@import("builtin").StackTrace) noreturn {
\\ @import("std").os.exit(126);