mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
f1366c5524
DFSan changes the ABI of each function in the module. This makes it possible for a function with the native ABI to be called with the instrumented ABI, or vice versa, thus possibly invoking undefined behavior. A simple way of statically detecting instances of this problem is to prepend the prefix "dfs$" to the name of each instrumented-ABI function. This will not catch every such problem; in particular function pointers passed across the instrumented-native barrier cannot be used on the other side. These problems could potentially be caught dynamically. Differential Revision: http://llvm-reviews.chandlerc.com/D1373 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189052 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
766 B
LLVM
24 lines
766 B
LLVM
; RUN: opt < %s -dfsan -S | FileCheck %s
|
|
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
|
|
|
|
; CHECK: @__dfsan_arg_tls = external thread_local(initialexec) global [64 x i16]
|
|
; CHECK: @__dfsan_retval_tls = external thread_local(initialexec) global i16
|
|
|
|
declare i32 @f(i32)
|
|
declare float @llvm.sqrt.f32(float)
|
|
|
|
; CHECK: @"dfs$call"
|
|
define i32 @call() {
|
|
; CHECK: store{{.*}}__dfsan_arg_tls
|
|
; CHECK: call{{.*}}@"dfs$f"
|
|
; CHECK: load{{.*}}__dfsan_retval_tls
|
|
%r = call i32 @f(i32 0)
|
|
|
|
; CHECK-NOT: store{{.*}}__dfsan_arg_tls
|
|
%i = call float @llvm.sqrt.f32(float -1.0)
|
|
|
|
; CHECK: store{{.*}}__dfsan_retval_tls
|
|
; CHECK: ret i32
|
|
ret i32 %r
|
|
}
|