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b310adabbe
The unsafe stack pointer is only popped in moveStaticAllocasToUnsafeStack so it won't happen if there are no static allocas. Fixes https://llvm.org/bugs/show_bug.cgi?id=26122 Differential Revision: http://reviews.llvm.org/D16339 llvm-svn: 259447
44 lines
1.9 KiB
LLVM
44 lines
1.9 KiB
LLVM
; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
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; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
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%struct.__jmp_buf_tag = type { [8 x i64], i32, %struct.__sigset_t }
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%struct.__sigset_t = type { [16 x i64] }
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@.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1
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@buf = internal global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
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; setjmp/longjmp test with dynamically sized array.
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; Requires protector.
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; CHECK: @foo(i32 %[[ARG:.*]])
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define i32 @foo(i32 %size) nounwind uwtable safestack {
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entry:
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; CHECK: %[[SP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
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; CHECK-NEXT: %[[DYNPTR:.*]] = alloca i8*
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; CHECK-NEXT: store i8* %[[SP]], i8** %[[DYNPTR]]
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; CHECK-NEXT: %[[ZEXT:.*]] = zext i32 %[[ARG]] to i64
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; CHECK-NEXT: %[[MUL:.*]] = mul i64 %[[ZEXT]], 4
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; CHECK-NEXT: %[[SP2:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
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; CHECK-NEXT: %[[PTRTOINT:.*]] = ptrtoint i8* %[[SP2]] to i64
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; CHECK-NEXT: %[[SUB:.*]] = sub i64 %[[PTRTOINT]], %[[MUL]]
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; CHECK-NEXT: %[[AND:.*]] = and i64 %[[SUB]], -16
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; CHECK-NEXT: %[[INTTOPTR:.*]] = inttoptr i64 %[[AND]] to i8*
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; CHECK-NEXT: store i8* %[[INTTOPTR]], i8** @__safestack_unsafe_stack_ptr
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; CHECK-NEXT: store i8* %[[INTTOPTR]], i8** %unsafe_stack_dynamic_ptr
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; CHECK-NEXT: %[[ALLOCA:.*]] = bitcast i8* %[[INTTOPTR]] to i32*
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%a = alloca i32, i32 %size
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; CHECK: setjmp
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; CHECK-NEXT: %[[LOAD:.*]] = load i8*, i8** %[[DYNPTR]]
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; CHECK-NEXT: store i8* %[[LOAD]], i8** @__safestack_unsafe_stack_ptr
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%call = call i32 @_setjmp(%struct.__jmp_buf_tag* getelementptr inbounds ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @buf, i32 0, i32 0)) returns_twice
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; CHECK: call void @funcall(i32* %[[ALLOCA]])
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call void @funcall(i32* %a)
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; CHECK-NEXT: store i8* %[[SP:.*]], i8** @__safestack_unsafe_stack_ptr
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ret i32 0
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}
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declare i32 @_setjmp(%struct.__jmp_buf_tag*)
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declare void @funcall(i32*)
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