2023-08-08 14:47:36 -05:00
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// Verifies that AddressSanitizer symbols show up as expected in LLVM IR with `-Zsanitizer`.
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// This is a regression test for https://github.com/rust-lang/rust/issues/113404
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//
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// Notes about the `compile-flags` below:
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//
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// * The original issue only reproed with LTO - this is why this angle has
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// extra test coverage via different `revisions`
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// * To observe the failure/repro at LLVM-IR level we need to use `staticlib`
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// which necessitates `-C prefer-dynamic=false` - without the latter flag,
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// we would have run into "cannot prefer dynamic linking when performing LTO".
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//
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// The test is restricted to `only-linux`, because the sanitizer-related instrumentation is target
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// specific. In particular, `___asan_globals_registered` is only used in the
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// `InstrumentGlobalsELF` and `InstrumentGlobalsMachO` code paths. The `only-linux` filter is
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// narrower than really needed (i.e. narrower than ELF-or-MachO), but this seems ok - having a
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// linux-only regression test should be sufficient here.
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//
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// needs-sanitizer-address
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// only-linux
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//
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// revisions:ASAN ASAN-FAT-LTO
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2023-09-20 19:00:00 -05:00
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// compile-flags: -Zsanitizer=address -Ctarget-feature=-crt-static
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//[ASAN] compile-flags:
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//[ASAN-FAT-LTO] compile-flags: -Cprefer-dynamic=false -Clto=fat
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2023-08-08 14:47:36 -05:00
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#![crate_type="staticlib"]
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// The test below mimics `CACHED_POW10` from `library/core/src/num/flt2dec/strategy/grisu.rs` which
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// (because of incorrect handling of `___asan_globals_registered` during LTO) was incorrectly
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// reported as an ODR violation in https://crbug.com/1459233#c1. Before this bug was fixed,
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// `___asan_globals_registered` would show up as `internal global i64` rather than `common hidden
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// global i64`. (The test expectations ignore the exact type because on `arm-android` the type
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// is `i32` rather than `i64`.)
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//
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// CHECK: @___asan_globals_registered = common hidden global
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// CHECK: @__start_asan_globals = extern_weak hidden global
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// CHECK: @__stop_asan_globals = extern_weak hidden global
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#[no_mangle]
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pub static CACHED_POW10: [(u64, i16, i16); 4] = [
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(0xe61acf033d1a45df, -1087, -308),
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(0xab70fe17c79ac6ca, -1060, -300),
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(0xff77b1fcbebcdc4f, -1034, -292),
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(0xbe5691ef416bd60c, -1007, -284),
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];
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