mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-29 23:12:55 +01:00
55fd79efac
Init-order and use-after-return modes can currently be enabled by runtime flags. use-after-scope mode is not really working at the moment. The only problem I see is that users won't be able to disable extra instrumentation for init-order and use-after-scope by a top-level Clang flag. But this instrumentation was implicitly enabled for quite a while and we didn't hear from users hurt by it. llvm-svn: 210924
85 lines
3.1 KiB
LLVM
85 lines
3.1 KiB
LLVM
; Test hanlding of llvm.lifetime intrinsics.
|
|
; RUN: opt < %s -asan -asan-module -asan-check-lifetime -asan-use-after-return=0 -S | FileCheck %s
|
|
|
|
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"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
|
|
declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
|
|
|
|
define void @lifetime_no_size() sanitize_address {
|
|
entry:
|
|
%i = alloca i32, align 4
|
|
%i.ptr = bitcast i32* %i to i8*
|
|
call void @llvm.lifetime.start(i64 -1, i8* %i.ptr)
|
|
call void @llvm.lifetime.end(i64 -1, i8* %i.ptr)
|
|
|
|
; Check that lifetime with no size are ignored.
|
|
; CHECK-LABEL: define void @lifetime_no_size()
|
|
; CHECK-NOT: @__asan_poison_stack_memory
|
|
; CHECK-NOT: @__asan_unpoison_stack_memory
|
|
; CHECK: ret void
|
|
ret void
|
|
}
|
|
|
|
; Generic case of lifetime analysis.
|
|
define void @lifetime() sanitize_address {
|
|
; CHECK-LABEL: define void @lifetime()
|
|
|
|
; Regular variable lifetime intrinsics.
|
|
%i = alloca i32, align 4
|
|
%i.ptr = bitcast i32* %i to i8*
|
|
call void @llvm.lifetime.start(i64 3, i8* %i.ptr)
|
|
; Memory is unpoisoned at llvm.lifetime.start
|
|
; CHECK: %[[VAR:[^ ]*]] = ptrtoint i32* %{{[^ ]+}} to i64
|
|
; CHECK-NEXT: call void @__asan_unpoison_stack_memory(i64 %[[VAR]], i64 3)
|
|
call void @llvm.lifetime.end(i64 4, i8* %i.ptr)
|
|
call void @llvm.lifetime.end(i64 2, i8* %i.ptr)
|
|
; Memory is poisoned at every call to llvm.lifetime.end
|
|
; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 4)
|
|
; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 2)
|
|
|
|
; Lifetime intrinsics for array.
|
|
%arr = alloca [10 x i32], align 16
|
|
%arr.ptr = bitcast [10 x i32]* %arr to i8*
|
|
call void @llvm.lifetime.start(i64 40, i8* %arr.ptr)
|
|
; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 40)
|
|
call void @llvm.lifetime.end(i64 40, i8* %arr.ptr)
|
|
; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 40)
|
|
|
|
; One more lifetime start/end for the same variable %i.
|
|
call void @llvm.lifetime.start(i64 4, i8* %i.ptr)
|
|
; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 4)
|
|
call void @llvm.lifetime.end(i64 4, i8* %i.ptr)
|
|
; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 4)
|
|
|
|
; Memory is unpoisoned at function exit (only once).
|
|
; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 {{.*}})
|
|
; CHECK-NOT: @__asan_unpoison_stack_memory
|
|
; CHECK: ret void
|
|
ret void
|
|
}
|
|
|
|
; Check that arguments of lifetime may come from phi nodes.
|
|
define void @phi_args(i1 %x) sanitize_address {
|
|
; CHECK-LABEL: define void @phi_args(i1 %x)
|
|
|
|
entry:
|
|
%i = alloca i64, align 4
|
|
%i.ptr = bitcast i64* %i to i8*
|
|
call void @llvm.lifetime.start(i64 8, i8* %i.ptr)
|
|
; CHECK: __asan_unpoison_stack_memory
|
|
br i1 %x, label %bb0, label %bb1
|
|
|
|
bb0:
|
|
%i.ptr2 = bitcast i64* %i to i8*
|
|
br label %bb1
|
|
|
|
bb1:
|
|
%i.phi = phi i8* [ %i.ptr, %entry ], [ %i.ptr2, %bb0 ]
|
|
call void @llvm.lifetime.end(i64 8, i8* %i.phi)
|
|
; CHECK: __asan_poison_stack_memory
|
|
; CHECK: ret void
|
|
ret void
|
|
}
|