43 lines
1.1 KiB
Rust
43 lines
1.1 KiB
Rust
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// min-llvm-version: 16
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// revisions: x86_64 i686
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// assembly-output: emit-asm
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//[x86_64] compile-flags: --target x86_64-unknown-linux-gnu
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//[x86_64] needs-llvm-components: x86
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//[i686] compile-flags: --target i686-unknown-linux-gnu
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//[i686] needs-llvm-components: x86
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// compile-flags: -C llvm-args=-x86-asm-syntax=intel
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#![feature(no_core, lang_items)]
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#![crate_type = "lib"]
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#![no_core]
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#[lang = "sized"]
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trait Sized {}
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#[lang = "copy"]
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trait Copy {}
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impl Copy for u8 {}
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// Check that inline-asm stack probes are generated correctly.
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// To avoid making this test fragile to slight asm changes,
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// we only check that the stack pointer is decremented by a page at a time,
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// instead of matching the whole probe sequence.
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// CHECK-LABEL: small_stack_probe:
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#[no_mangle]
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pub fn small_stack_probe(x: u8, f: fn(&mut [u8; 8192])) {
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// CHECK-NOT: __rust_probestack
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// x86_64: sub rsp, 4096
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// i686: sub esp, 4096
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f(&mut [x; 8192]);
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}
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// CHECK-LABEL: big_stack_probe:
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#[no_mangle]
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pub fn big_stack_probe(x: u8, f: fn(&[u8; 65536])) {
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// CHECK-NOT: __rust_probestack
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// x86_64: sub rsp, 4096
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// i686: sub esp, 4096
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f(&mut [x; 65536]);
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}
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