mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 02:52:53 +02:00
169602960f
Summary: Display a list of recent stack frames (not a stack trace!) when tag-mismatch is detected on a stack address. The implementation uses alignment tricks to get both the address of the history buffer, and the base address of the shadow with a single 8-byte load. See the comment in hwasan_thread_list.h for more details. Developed in collaboration with Kostya Serebryany. Reviewers: kcc Subscribers: srhines, kubamracek, mgorny, hiraditya, jfb, llvm-commits Differential Revision: https://reviews.llvm.org/D52249 llvm-svn: 342923
52 lines
2.4 KiB
LLVM
52 lines
2.4 KiB
LLVM
; Test alloca instrumentation.
|
|
;
|
|
; RUN: opt < %s -hwasan -hwasan-with-ifunc=1 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,NO-UAR-TAGS
|
|
; RUN: opt < %s -hwasan -hwasan-mapping-offset=0 -S | FileCheck %s --check-prefixes=CHECK,ZERO-BASED-SHADOW,NO-UAR-TAGS
|
|
; RUN: opt < %s -hwasan -hwasan-with-ifunc=1 -hwasan-uar-retag-to-zero=0 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,UAR-TAGS
|
|
|
|
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64--linux-android"
|
|
|
|
declare void @use32(i32*)
|
|
|
|
define void @test_alloca() sanitize_hwaddress {
|
|
; CHECK-LABEL: @test_alloca(
|
|
; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
|
|
; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64
|
|
; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20
|
|
; CHECK: %[[BASE_TAG:[^ ]*]] = xor i64 %[[A]], %[[B]]
|
|
|
|
; CHECK: %[[X:[^ ]*]] = alloca i32, align 16
|
|
; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0
|
|
; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X]] to i64
|
|
; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56
|
|
; CHECK: %[[D:[^ ]*]] = or i64 %[[X1]], %[[C]]
|
|
; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[D]] to i32*
|
|
|
|
; CHECK: %[[X_TAG2:[^ ]*]] = trunc i64 %[[X_TAG]] to i8
|
|
; CHECK: %[[E:[^ ]*]] = ptrtoint i32* %[[X]] to i64
|
|
; CHECK: %[[F:[^ ]*]] = lshr i64 %[[E]], 4
|
|
; DYNAMIC-SHADOW: %[[F_DYN:[^ ]*]] = add i64 %[[F]], %.hwasan.shadow
|
|
; DYNAMIC-SHADOW: %[[X_SHADOW:[^ ]*]] = inttoptr i64 %[[F_DYN]] to i8*
|
|
; ZERO-BASED-SHADOW: %[[X_SHADOW:[^ ]*]] = inttoptr i64 %[[F]] to i8*
|
|
; CHECK: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW]], i8 %[[X_TAG2]], i64 1, i1 false)
|
|
; CHECK: call void @use32(i32* nonnull %[[X_HWASAN]])
|
|
|
|
; UAR-TAGS: %[[BASE_TAG_COMPL:[^ ]*]] = xor i64 %[[BASE_TAG]], 255
|
|
; UAR-TAGS: %[[X_TAG_UAR:[^ ]*]] = trunc i64 %[[BASE_TAG_COMPL]] to i8
|
|
; CHECK: %[[E2:[^ ]*]] = ptrtoint i32* %[[X]] to i64
|
|
; CHECK: %[[F2:[^ ]*]] = lshr i64 %[[E2]], 4
|
|
; DYNAMIC-SHADOW: %[[F2_DYN:[^ ]*]] = add i64 %[[F2]], %.hwasan.shadow
|
|
; DYNAMIC-SHADOW: %[[X_SHADOW2:[^ ]*]] = inttoptr i64 %[[F2_DYN]] to i8*
|
|
; ZERO-BASED-SHADOW: %[[X_SHADOW2:[^ ]*]] = inttoptr i64 %[[F2]] to i8*
|
|
; NO-UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 0, i64 1, i1 false)
|
|
; UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 %[[X_TAG_UAR]], i64 1, i1 false)
|
|
; CHECK: ret void
|
|
|
|
|
|
entry:
|
|
%x = alloca i32, align 4
|
|
call void @use32(i32* nonnull %x)
|
|
ret void
|
|
}
|