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45adab87a5
This ensures that user arguments can override target arguments without being silently ignored.
81 lines
1.8 KiB
Rust
81 lines
1.8 KiB
Rust
//@ only-wasm32
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//@ assembly-output: emit-asm
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//@ compile-flags: -C target-feature=+exception-handling
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//@ compile-flags: -C panic=unwind
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//@ compile-flags: -C llvm-args=-wasm-use-legacy-eh=true
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// Verifies that user-supplied `-Cllvm-args` can override an LLVM argument that
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// was set in the target spec. The `wasm32-unknown-unknown` target spec pins
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// `-wasm-use-legacy-eh=false`; this test asserts that passing the opposite
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// value via `-Cllvm-args` switches code generation back to the legacy
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// exception-handling instructions.
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#![crate_type = "lib"]
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#![feature(core_intrinsics)]
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extern "C-unwind" {
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fn may_panic();
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}
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extern "C" {
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fn log_number(number: usize);
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}
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struct LogOnDrop;
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impl Drop for LogOnDrop {
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fn drop(&mut self) {
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unsafe {
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log_number(0);
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}
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}
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}
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// CHECK-LABEL: test_cleanup:
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#[no_mangle]
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pub fn test_cleanup() {
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let _log_on_drop = LogOnDrop;
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unsafe {
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may_panic();
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}
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// CHECK-NOT: try_table
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// CHECK-NOT: catch_all_ref
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// CHECK-NOT: throw_ref
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// CHECK-NOT: call
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// CHECK: try
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// CHECK: call may_panic
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// CHECK: catch_all
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// CHECK: rethrow
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// CHECK: end_try
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}
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// CHECK-LABEL: test_rtry:
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#[no_mangle]
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pub fn test_rtry() {
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unsafe {
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core::intrinsics::catch_unwind(
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|_| {
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may_panic();
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},
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core::ptr::null_mut(),
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|data, exception| {
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log_number(data as usize);
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log_number(exception as usize);
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},
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);
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}
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// CHECK-NOT: try_table
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// CHECK-NOT: catch_all_ref
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// CHECK-NOT: throw_ref
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// CHECK-NOT: call
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// CHECK: try
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// CHECK: call may_panic
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// CHECK: catch
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// CHECK: call log_number
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// CHECK: call log_number
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// CHECK-NOT: rethrow
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// CHECK: end_try
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}
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