mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-19 01:34:32 +00:00
cbd84586ef
Instead of creating global variables for source locations and global names, just create metadata nodes and strings. They will be transformed into actual globals in the instrumentation pass (if necessary). This approach is more flexible: 1) we don't have to ensure that our custom globals survive all the optimizations 2) if globals are discarded for some reason, we will simply ignore metadata for them and won't have to erase corresponding globals 3) metadata for source locations can be reused for other purposes: e.g. we may attach source location metadata to alloca instructions and provide better descriptions for stack variables in ASan error reports. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214604 91177308-0d34-0410-b5e6-96231b3b80d8
68 lines
3.2 KiB
LLVM
68 lines
3.2 KiB
LLVM
; RUN: opt < %s -asan -asan-module -S | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
; Globals:
|
|
@global = global i32 0, align 4
|
|
@dyn_init_global = global i32 0, align 4
|
|
@blacklisted_global = global i32 0, align 4
|
|
@_ZZ4funcvE10static_var = internal global i32 0, align 4
|
|
@.str = private unnamed_addr constant [14 x i8] c"Hello, world!\00", align 1
|
|
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_asan_globals.cpp, i8* null }]
|
|
|
|
; Check that globals were instrumented:
|
|
; CHECK: @global = global { i32, [60 x i8] } zeroinitializer, align 32
|
|
; CHECK: @.str = internal unnamed_addr constant { [14 x i8], [50 x i8] } { [14 x i8] c"Hello, world!\00", [50 x i8] zeroinitializer }, align 32
|
|
|
|
; Check emitted location descriptions:
|
|
; CHECK: [[VARNAME:@__asan_gen_[0-9]+]] = private unnamed_addr constant [7 x i8] c"global\00", align 1
|
|
; CHECK: [[FILENAME:@__asan_gen_[0-9]+]] = private unnamed_addr constant [22 x i8] c"/tmp/asan-globals.cpp\00", align 1
|
|
; CHECK: [[LOCDESCR:@__asan_gen_[0-9]+]] = private unnamed_addr constant { [22 x i8]*, i32, i32 } { [22 x i8]* [[FILENAME]], i32 5, i32 5 }
|
|
|
|
; Check that location decriptors and global names were passed into __asan_register_globals:
|
|
; CHECK: i64 ptrtoint ([7 x i8]* [[VARNAME]] to i64)
|
|
; CHECK: i64 ptrtoint ({ [22 x i8]*, i32, i32 }* [[LOCDESCR]] to i64)
|
|
|
|
; Function Attrs: nounwind sanitize_address
|
|
define internal void @__cxx_global_var_init() #0 section ".text.startup" {
|
|
entry:
|
|
%0 = load i32* @global, align 4
|
|
store i32 %0, i32* @dyn_init_global, align 4
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind sanitize_address
|
|
define void @_Z4funcv() #1 {
|
|
entry:
|
|
%literal = alloca i8*, align 8
|
|
store i8* getelementptr inbounds ([14 x i8]* @.str, i32 0, i32 0), i8** %literal, align 8
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind sanitize_address
|
|
define internal void @_GLOBAL__sub_I_asan_globals.cpp() #0 section ".text.startup" {
|
|
entry:
|
|
call void @__cxx_global_var_init()
|
|
ret void
|
|
}
|
|
|
|
attributes #0 = { nounwind sanitize_address }
|
|
attributes #1 = { nounwind sanitize_address "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
|
|
!llvm.asan.globals = !{!0, !1, !2, !3, !4}
|
|
!llvm.ident = !{!5}
|
|
|
|
!0 = metadata !{i32* @global, metadata !6, metadata !"global", i1 false, i1 false}
|
|
!1 = metadata !{i32* @dyn_init_global, metadata !7, metadata !"dyn_init_global", i1 true, i1 false}
|
|
!2 = metadata !{i32* @blacklisted_global, null, null, i1 false, i1 true}
|
|
!3 = metadata !{i32* @_ZZ4funcvE10static_var, metadata !8, metadata !"static_var", i1 false, i1 false}
|
|
!4 = metadata !{[14 x i8]* @.str, metadata !9, metadata !"<string literal>", i1 false, i1 false}
|
|
|
|
!5 = metadata !{metadata !"clang version 3.5.0 (211282)"}
|
|
|
|
!6 = metadata !{metadata !"/tmp/asan-globals.cpp", i32 5, i32 5}
|
|
!7 = metadata !{metadata !"/tmp/asan-globals.cpp", i32 7, i32 5}
|
|
!8 = metadata !{metadata !"/tmp/asan-globals.cpp", i32 12, i32 14}
|
|
!9 = metadata !{metadata !"/tmp/asan-globals.cpp", i32 14, i32 25}
|