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187 lines
5.9 KiB
LLVM
187 lines
5.9 KiB
LLVM
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; Test handling of llvm.lifetime intrinsics.
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; RUN: opt < %s -asan -asan-module -asan-use-after-scope -asan-use-after-return=0 -S | FileCheck %s --check-prefixes=CHECK,CHECK-DEFAULT
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; RUN: opt < %s -asan -asan-module -asan-use-after-scope -asan-use-after-return=0 -asan-instrument-dynamic-allocas=0 -S | FileCheck %s --check-prefixes=CHECK,CHECK-NO-DYNAMIC
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind
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define void @lifetime_no_size() sanitize_address {
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; CHECK-LABEL: define void @lifetime_no_size()
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entry:
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%i = alloca i32, align 4
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%i.ptr = bitcast i32* %i to i8*
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; Poison memory in prologue: F1F1F1F104F3F3F3
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; CHECK: store i64 -868083100587789839, i64* %{{[0-9]+}}
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call void @llvm.lifetime.start.p0i8(i64 -1, i8* %i.ptr)
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; Check that lifetime with no size are ignored.
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; CHECK-NOT: store
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; CHECK: call void @llvm.lifetime.start
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store volatile i8 0, i8* %i.ptr
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; CHECK: store volatile
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call void @llvm.lifetime.end.p0i8(i64 -1, i8* %i.ptr)
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; Check that lifetime with no size are ignored.
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; CHECK-NOT: store
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; CHECK: call void @llvm.lifetime.end
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; Unpoison stack frame on exit.
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; CHECK: store i64 0, i64* %{{[0-9]+}}
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; CHECK: ret void
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ret void
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}
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; Generic case of lifetime analysis.
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define void @lifetime() sanitize_address {
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; CHECK-LABEL: define void @lifetime()
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; Regular variable lifetime intrinsics.
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%i = alloca i32, align 4
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%i.ptr = bitcast i32* %i to i8*
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; Poison memory in prologue: F1F1F1F1F8F3F3F3
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; CHECK: store i64 -868082052615769615, i64* %{{[0-9]+}}
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; Memory is unpoisoned at llvm.lifetime.start
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call void @llvm.lifetime.start.p0i8(i64 3, i8* %i.ptr)
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; CHECK: store i8 4, i8* %{{[0-9]+}}
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; CHECK-NEXT: llvm.lifetime.start
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store volatile i8 0, i8* %i.ptr
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; CHECK: store volatile
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %i.ptr)
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; CHECK: store i8 -8, i8* %{{[0-9]+}}
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; CHECK-NEXT: call void @llvm.lifetime.end
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; Memory is poisoned at every call to llvm.lifetime.end
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call void @llvm.lifetime.end.p0i8(i64 2, i8* %i.ptr)
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; CHECK: store i8 -8, i8* %{{[0-9]+}}
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; CHECK-NEXT: call void @llvm.lifetime.end
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; Lifetime intrinsics for array.
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%arr = alloca [10 x i32], align 16
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%arr.ptr = bitcast [10 x i32]* %arr to i8*
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call void @llvm.lifetime.start.p0i8(i64 40, i8* %arr.ptr)
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; CHECK-DEFAULT: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 40)
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; CHECK-NO-DYNAMIC-NOT: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 40)
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store volatile i8 0, i8* %arr.ptr
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; CHECK: store volatile
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call void @llvm.lifetime.end.p0i8(i64 40, i8* %arr.ptr)
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; CHECK-DEFAULT: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 40)
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; CHECK-NO-DYNAMIC-NOT: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 40)
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; One more lifetime start/end for the same variable %i.
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call void @llvm.lifetime.start.p0i8(i64 2, i8* %i.ptr)
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; CHECK: store i8 4, i8* %{{[0-9]+}}
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; CHECK-NEXT: llvm.lifetime.start
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store volatile i8 0, i8* %i.ptr
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; CHECK: store volatile
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %i.ptr)
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; CHECK: store i8 -8, i8* %{{[0-9]+}}
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; CHECK-NEXT: llvm.lifetime.end
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; Memory is unpoisoned at function exit (only once).
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; CHECK: store i64 0, i64* %{{[0-9]+}}
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; CHECK-NEXT: ret void
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ret void
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}
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; Check that arguments of lifetime may come from phi nodes.
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define void @phi_args(i1 %x) sanitize_address {
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; CHECK-LABEL: define void @phi_args(i1 %x)
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entry:
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%i = alloca i64, align 4
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%i.ptr = bitcast i64* %i to i8*
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; Poison memory in prologue: F1F1F1F1F8F3F3F3
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; CHECK: store i64 -868082052615769615, i64* %{{[0-9]+}}
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %i.ptr)
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; CHECK: store i8 0, i8* %{{[0-9]+}}
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; CHECK-NEXT: llvm.lifetime.start
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store volatile i8 0, i8* %i.ptr
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; CHECK: store volatile
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br i1 %x, label %bb0, label %bb1
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bb0:
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%i.ptr2 = bitcast i64* %i to i8*
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br label %bb1
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bb1:
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%i.phi = phi i8* [ %i.ptr, %entry ], [ %i.ptr2, %bb0 ]
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %i.phi)
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; CHECK: store i8 -8, i8* %{{[0-9]+}}
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; CHECK-NEXT: llvm.lifetime.end
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ret void
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; CHECK: store i64 0, i64* %{{[0-9]+}}
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; CHECK-NEXT: ret void
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}
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; Check that arguments of lifetime may come from getelementptr nodes.
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define void @getelementptr_args() sanitize_address{
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; CHECK-LABEL: define void @getelementptr_args
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entry:
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%x = alloca [1024 x i8], align 16
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%d = alloca i8*, align 8
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; F1F1F1F1
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; CHECK: store i32 -235802127, i32* %{{[0-9]+}}
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; F3F3F3F3F3F3F3F3
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; CHECK: store i64 -868082074056920077, i64* %{{[0-9]+}}
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; F3F3F3F3F3F3F3F3
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; CHECK: store i64 -868082074056920077, i64* %{{[0-9]+}}
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%0 = getelementptr inbounds [1024 x i8], [1024 x i8]* %x, i64 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 1024, i8* %0)
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; CHECK: call void @__asan_set_shadow_00(i64 %{{[0-9]+}}, i64 128)
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; CHECK-NEXT: call void @llvm.lifetime.start
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store i8* %0, i8** %d, align 8
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; CHECK: store i8
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call void @llvm.lifetime.end.p0i8(i64 1024, i8* %0)
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; CHECK: call void @__asan_set_shadow_f8(i64 %{{[0-9]+}}, i64 128)
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; CHECK-NEXT: call void @llvm.lifetime.end
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ret void
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; CHECK: call void @__asan_set_shadow_00(i64 %{{[0-9]+}}, i64 148)
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; CHECK-NEXT: ret void
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}
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define void @zero_sized(i64 %a) #0 {
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; CHECK-LABEL: define void @zero_sized(i64 %a)
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entry:
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%a.addr = alloca i64, align 8
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%b = alloca [0 x i8], align 1
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store i64 %a, i64* %a.addr, align 8
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%0 = bitcast [0 x i8]* %b to i8*
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call void @llvm.lifetime.start.p0i8(i64 0, i8* %0) #2
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; CHECK: %{{[0-9]+}} = bitcast
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; CHECK-NEXT: call void @llvm.lifetime.start
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%1 = bitcast [0 x i8]* %b to i8*
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call void @llvm.lifetime.end.p0i8(i64 0, i8* %1) #2
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; CHECK-NEXT: %{{[0-9]+}} = bitcast
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; CHECK-NEXT: call void @llvm.lifetime.end
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ret void
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; CHECK-NEXT: ret void
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}
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