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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:28 +0000 |
commit | 94a0819fe3a0d679c3042a77bfe6a2afc505daea (patch) | |
tree | 2b827afe6a05f3538db3f7803a88c4587fe85648 /src/test/assembly/x86-stack-probes.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-94a0819fe3a0d679c3042a77bfe6a2afc505daea.tar.xz rustc-94a0819fe3a0d679c3042a77bfe6a2afc505daea.zip |
Adding upstream version 1.66.0+dfsg1.upstream/1.66.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/assembly/x86-stack-probes.rs')
-rw-r--r-- | src/test/assembly/x86-stack-probes.rs | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/test/assembly/x86-stack-probes.rs b/src/test/assembly/x86-stack-probes.rs new file mode 100644 index 000000000..c7141fb20 --- /dev/null +++ b/src/test/assembly/x86-stack-probes.rs @@ -0,0 +1,42 @@ +// min-llvm-version: 16 +// revisions: x86_64 i686 +// assembly-output: emit-asm +//[x86_64] compile-flags: --target x86_64-unknown-linux-gnu +//[x86_64] needs-llvm-components: x86 +//[i686] compile-flags: --target i686-unknown-linux-gnu +//[i686] needs-llvm-components: x86 +// compile-flags: -C llvm-args=-x86-asm-syntax=intel + +#![feature(no_core, lang_items)] +#![crate_type = "lib"] +#![no_core] + +#[lang = "sized"] +trait Sized {} +#[lang = "copy"] +trait Copy {} + +impl Copy for u8 {} + +// Check that inline-asm stack probes are generated correctly. +// To avoid making this test fragile to slight asm changes, +// we only check that the stack pointer is decremented by a page at a time, +// instead of matching the whole probe sequence. + +// CHECK-LABEL: small_stack_probe: +#[no_mangle] +pub fn small_stack_probe(x: u8, f: fn(&mut [u8; 8192])) { + // CHECK-NOT: __rust_probestack + // x86_64: sub rsp, 4096 + // i686: sub esp, 4096 + f(&mut [x; 8192]); +} + +// CHECK-LABEL: big_stack_probe: +#[no_mangle] +pub fn big_stack_probe(x: u8, f: fn(&[u8; 65536])) { + // CHECK-NOT: __rust_probestack + // x86_64: sub rsp, 4096 + // i686: sub esp, 4096 + f(&mut [x; 65536]); +} |