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llvm-project/llvm/test/Instrumentation/HWAddressSanitizer/kernel.ll

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hwasan: add -fsanitize=kernel-hwaddress flag This patch adds -fsanitize=kernel-hwaddress flag, that essentially enables -hwasan-kernel=1 -hwasan-recover=1 -hwasan-match-all-tag=0xff. Differential Revision: https://reviews.llvm.org/D45046 llvm-svn: 330044
2018-04-14 02:05:21 +08:00
; Test KHWASan instrumentation.
[hwasan] LLVM-level flags for linux kernel-compatible hwasan instrumentation. Summary: -hwasan-mapping-offset defines the non-zero shadow base address. -hwasan-kernel disables calls to __hwasan_init in module constructors. Unlike ASan, -hwasan-kernel does not force callback instrumentation. This is controlled separately with -hwasan-instrument-with-calls. Reviewers: kcc Subscribers: srhines, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D42141 llvm-svn: 322785
2018-01-18 07:24:38 +08:00
;
[hwasan] Fix inline instrumentation. This patch changes hwasan inline instrumentation: Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte). Emits brk instruction instead of hlt for the kernel and user space. Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel). Fixes and adds appropriate tests. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D43135 llvm-svn: 325711
2018-02-22 03:52:23 +08:00
; RUN: opt < %s -hwasan -hwasan-kernel=1 -S | FileCheck %s --allow-empty --check-prefixes=INIT
hwasan: add -fsanitize=kernel-hwaddress flag This patch adds -fsanitize=kernel-hwaddress flag, that essentially enables -hwasan-kernel=1 -hwasan-recover=1 -hwasan-match-all-tag=0xff. Differential Revision: https://reviews.llvm.org/D45046 llvm-svn: 330044
2018-04-14 02:05:21 +08:00
; RUN: opt < %s -hwasan -hwasan-kernel=1 -S | FileCheck %s --check-prefixes=CHECK,NOOFFSET,MATCH-ALL
; RUN: opt < %s -hwasan -hwasan-kernel=1 -hwasan-mapping-offset=12345678 -S | FileCheck %s --check-prefixes=CHECK,OFFSET,MATCH-ALL
; RUN: opt < %s -hwasan -hwasan-kernel=1 -hwasan-recover=0 -S | FileCheck %s --check-prefixes=CHECK,NOOFFSET,ABORT,MATCH-ALL
; RUN: opt < %s -hwasan -hwasan-kernel=1 -hwasan-recover=1 -S | FileCheck %s --check-prefixes=CHECK,NOOFFSET,RECOVER,MATCH-ALL
; RUN: opt < %s -hwasan -hwasan-kernel=1 -hwasan-recover=1 -hwasan-match-all-tag=-1 -S | FileCheck %s --check-prefixes=CHECK,NOOFFSET,RECOVER,NO-MATCH-ALL
[hwasan] LLVM-level flags for linux kernel-compatible hwasan instrumentation. Summary: -hwasan-mapping-offset defines the non-zero shadow base address. -hwasan-kernel disables calls to __hwasan_init in module constructors. Unlike ASan, -hwasan-kernel does not force callback instrumentation. This is controlled separately with -hwasan-instrument-with-calls. Reviewers: kcc Subscribers: srhines, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D42141 llvm-svn: 322785
2018-01-18 07:24:38 +08:00
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--linux-android"
define i8 @test_load(i8* %a) sanitize_hwaddress {
[hwasan] Fix inline instrumentation. This patch changes hwasan inline instrumentation: Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte). Emits brk instruction instead of hlt for the kernel and user space. Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel). Fixes and adds appropriate tests. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D43135 llvm-svn: 325711
2018-02-22 03:52:23 +08:00
; CHECK-LABEL: @test_load(
; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %a to i64
; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 56
; CHECK: %[[PTRTAG:[^ ]*]] = trunc i64 %[[B]] to i8
; CHECK: %[[C:[^ ]*]] = or i64 %[[A]], -72057594037927936
; CHECK: %[[D:[^ ]*]] = lshr i64 %[[C]], 4
; NOOFFSET: %[[E:[^ ]*]] = inttoptr i64 %[[D]] to i8*
[hwasan] LLVM-level flags for linux kernel-compatible hwasan instrumentation. Summary: -hwasan-mapping-offset defines the non-zero shadow base address. -hwasan-kernel disables calls to __hwasan_init in module constructors. Unlike ASan, -hwasan-kernel does not force callback instrumentation. This is controlled separately with -hwasan-instrument-with-calls. Reviewers: kcc Subscribers: srhines, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D42141 llvm-svn: 322785
2018-01-18 07:24:38 +08:00
; OFFSET: %[[D1:[^ ]*]] = add i64 %[[D]], 12345678
; OFFSET: %[[E:[^ ]*]] = inttoptr i64 %[[D1]] to i8*
[hwasan] Fix inline instrumentation. This patch changes hwasan inline instrumentation: Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte). Emits brk instruction instead of hlt for the kernel and user space. Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel). Fixes and adds appropriate tests. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D43135 llvm-svn: 325711
2018-02-22 03:52:23 +08:00
; CHECK: %[[MEMTAG:[^ ]*]] = load i8, i8* %[[E]]
; CHECK: %[[F:[^ ]*]] = icmp ne i8 %[[PTRTAG]], %[[MEMTAG]]
hwasan: add -hwasan-match-all-tag flag Sometimes instead of storing addresses as is, the kernel stores the address of a page and an offset within that page, and then computes the actual address when it needs to make an access. Because of this the pointer tag gets lost (gets set to 0xff). The solution is to ignore all accesses tagged with 0xff. This patch adds a -hwasan-match-all-tag flag to hwasan, which allows to ignore accesses through pointers with a particular pointer tag value for validity. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D44827 llvm-svn: 329228
2018-04-05 04:44:59 +08:00
; MATCH-ALL: %[[G:[^ ]*]] = icmp ne i8 %[[PTRTAG]], -1
; MATCH-ALL: %[[H:[^ ]*]] = and i1 %[[F]], %[[G]]
; MATCH-ALL: br i1 %[[H]], label {{.*}}, label {{.*}}, !prof {{.*}}
; NO-MATCH-ALL: br i1 %[[F]], label {{.*}}, label {{.*}}, !prof {{.*}}
[hwasan] Fix inline instrumentation. This patch changes hwasan inline instrumentation: Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte). Emits brk instruction instead of hlt for the kernel and user space. Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel). Fixes and adds appropriate tests. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D43135 llvm-svn: 325711
2018-02-22 03:52:23 +08:00
; ABORT: call void asm sideeffect "brk #2304", "{x0}"(i64 %[[A]])
; ABORT: unreachable
; RECOVER: call void asm sideeffect "brk #2336", "{x0}"(i64 %[[A]])
; RECOVER: br label
; CHECK: %[[G:[^ ]*]] = load i8, i8* %a, align 4
; CHECK: ret i8 %[[G]]
[hwasan] LLVM-level flags for linux kernel-compatible hwasan instrumentation. Summary: -hwasan-mapping-offset defines the non-zero shadow base address. -hwasan-kernel disables calls to __hwasan_init in module constructors. Unlike ASan, -hwasan-kernel does not force callback instrumentation. This is controlled separately with -hwasan-instrument-with-calls. Reviewers: kcc Subscribers: srhines, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D42141 llvm-svn: 322785
2018-01-18 07:24:38 +08:00
entry:
%b = load i8, i8* %a, align 4
ret i8 %b
}
[hwasan] Fix inline instrumentation. This patch changes hwasan inline instrumentation: Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte). Emits brk instruction instead of hlt for the kernel and user space. Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel). Fixes and adds appropriate tests. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D43135 llvm-svn: 325711
2018-02-22 03:52:23 +08:00
; INIT-NOT: call void @__hwasan_init