File: ssp.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (30 lines) | stat: -rw-r--r-- 994 bytes parent folder | download | duplicates (8) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
; RUN: opt -safe-stack -S -mtriple=x86_64-unknown < %s -o - | FileCheck %s
; RUN: opt -passes=safe-stack -S -mtriple=x86_64-unknown < %s -o - | FileCheck %s

define void @foo() safestack sspreq {
entry:
; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
; CHECK: %[[USST:.*]] = getelementptr i8, ptr %[[USP]], i32 -16
; CHECK: store ptr %[[USST]], ptr @__safestack_unsafe_stack_ptr

; CHECK: %[[A:.*]] = getelementptr i8, ptr %[[USP]], i32 -8
; CHECK: %[[StackGuard:.*]] = call ptr @llvm.stackguard()
; CHECK: store ptr %[[StackGuard]], ptr %[[A]]
  %a = alloca i8, align 1

; CHECK: call void @Capture
  call void @Capture(ptr %a)

; CHECK: %[[B:.*]] = load ptr, ptr %[[A]]
; CHECK: %[[COND:.*]] = icmp ne ptr %[[StackGuard]], %[[B]]
; CHECK: br i1 %[[COND]], {{.*}} !prof

; CHECK:      call void @__stack_chk_fail()
; CHECK-NEXT: unreachable

; CHECK:      store ptr %[[USP]], ptr @__safestack_unsafe_stack_ptr
; CHECK-NEXT: ret void
  ret void
}

declare void @Capture(ptr)