c6b5a25eeb
The current naming scheme adds the `dfs$` prefix to all DFSan-instrumented functions. This breaks mangling and prevents stack trace printers and other tools from automatically demangling function names. This new naming scheme is mangling-compatible, with the `.dfsan` suffix being a vendor-specific suffix: https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling-structure With this fix, demangling utils would work out-of-the-box. Reviewed By: stephan.yichao.zhao Differential Revision: https://reviews.llvm.org/D104494
57 lines
1.4 KiB
LLVM
57 lines
1.4 KiB
LLVM
; RUN: opt < %s -dfsan -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"
|
|
|
|
; CHECK: @__dfsan_shadow_width_bits = weak_odr constant i32 [[#SBITS:]]
|
|
; CHECK: @__dfsan_shadow_width_bytes = weak_odr constant i32 [[#SBYTES:]]
|
|
|
|
@a = common global i32 0
|
|
@b = common global i32 0
|
|
|
|
; Check that we reuse unions where possible.
|
|
|
|
; CHECK-LABEL: @f.dfsan
|
|
define void @f(i32 %x, i32 %y) {
|
|
; CHECK: or i[[#SBITS]]
|
|
%xay = add i32 %x, %y
|
|
store i32 %xay, i32* @a
|
|
; CHECK-NOT: or i[[#SBITS]]
|
|
%xmy = mul i32 %x, %y
|
|
store i32 %xmy, i32* @b
|
|
ret void
|
|
}
|
|
|
|
; In this case, we compute the unions on both sides because neither block
|
|
; dominates the other.
|
|
|
|
; CHECK-LABEL: @g.dfsan
|
|
define void @g(i1 %p, i32 %x, i32 %y) {
|
|
br i1 %p, label %l1, label %l2
|
|
|
|
l1:
|
|
; CHECK: or i[[#SBITS]]
|
|
%xay = add i32 %x, %y
|
|
store i32 %xay, i32* @a
|
|
br label %l3
|
|
|
|
l2:
|
|
; CHECK: or i[[#SBITS]]
|
|
%xmy = mul i32 %x, %y
|
|
store i32 %xmy, i32* @b
|
|
br label %l3
|
|
|
|
l3:
|
|
ret void
|
|
}
|
|
|
|
; In this case, we know that the label for %xayax subsumes the label for %xay.
|
|
|
|
; CHECK-LABEL: @h.dfsan
|
|
define i32 @h(i32 %x, i32 %y) {
|
|
; CHECK: or i[[#SBITS]]
|
|
%xay = add i32 %x, %y
|
|
; CHECK-NOT: or i[[#SBITS]]
|
|
%xayax = add i32 %xay, %x
|
|
ret i32 %xayax
|
|
}
|