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SJLJ roc_panic on AArch64

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```
$ uname -m
arm64

$ cargo test -p test_gen gen_num::abs_min_int_overflow
    Finished test [unoptimized + debuginfo] target(s) in 0.09s
     Running src/tests.rs (target/debug/deps/test_gen-b2041868d2cf26f3)

running 1 test
test gen_num::abs_min_int_overflow - should panic ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 933 filtered out; finished in 0.14s
```
This commit is contained in:
Ayaz Hafiz 2022-04-27 13:31:33 -04:00 • committed by ayazhafiz
parent d8d3d7b30c
commit fa8108e3a8
4 changed files with 55 additions and 107 deletions
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21
compiler/builtins/bitcode/src/main.zig
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@ -163,6 +163,27 @@ comptime {
@export(utils.panic, .{ .name = "roc_builtins.utils." ++ "panic", .linkage = .Weak });
}
// Utils continued - SJLJ
// For tests (in particular test_gen), roc_panic is implemented in terms of
// setjmp/longjmp. LLVM is unable to generate code for longjmp on AArch64 (https://github.com/rtfeldman/roc/issues/2965),
// so instead we ask Zig to please provide implementations for us, which is does
// (seemingly via musl).
pub usingnamespace @import("std").c.builtins;
pub extern fn setjmp([*c]c_int) c_int;
pub extern fn longjmp([*c]c_int, c_int) noreturn;
pub extern fn _setjmp([*c]c_int) c_int;
pub extern fn _longjmp([*c]c_int, c_int) noreturn;
pub extern fn sigsetjmp([*c]c_int, c_int) c_int;
pub extern fn siglongjmp([*c]c_int, c_int) noreturn;
pub extern fn longjmperror() void;
// Zig won't expose the externs (and hence link correctly) unless we force them to be used.
pub export fn __roc_force_setjmp(it: [*c]c_int) c_int {
return setjmp(it);
}
pub export fn __roc_force_longjmp(a0: [*c]c_int, a1: c_int) noreturn {
longjmp(a0, a1);
}
// Export helpers - Must be run inside a comptime
fn exportBuiltinFn(comptime func: anytype, comptime func_name: []const u8) void {
@export(func, .{ .name = "roc_builtins." ++ func_name, .linkage = .Strong });