prologue.ll
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; Test -hwasan-with-ifunc flag.
;
; RUN: opt -hwasan -S < %s | \
; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-NOGLOBAL,CHECK-TLS,CHECK-HISTORY
; RUN: opt -hwasan -S -hwasan-with-ifunc=0 -hwasan-with-tls=1 -hwasan-record-stack-history=1 < %s | \
; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-NOGLOBAL,CHECK-TLS,CHECK-HISTORY
; RUN: opt -hwasan -S -hwasan-with-ifunc=0 -hwasan-with-tls=1 -hwasan-record-stack-history=0 < %s | \
; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-NOGLOBAL,CHECK-IFUNC,CHECK-NOHISTORY
; RUN: opt -hwasan -S -hwasan-with-ifunc=0 -hwasan-with-tls=0 < %s | \
; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-GLOBAL,CHECK-NOHISTORY
; RUN: opt -hwasan -S -hwasan-with-ifunc=1 -hwasan-with-tls=0 < %s | \
; RUN: FileCheck %s --check-prefixes=CHECK,CHECk-NOGLOBAL,CHECK-IFUNC,CHECK-NOHISTORY
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--linux-android22"
; CHECK-IFUNC: @__hwasan_shadow = external global [0 x i8]
; CHECK-NOIFUNC: @__hwasan_shadow_memory_dynamic_address = external global i64
define i32 @test_load(i32* %a) sanitize_hwaddress {
; First instrumentation in the function must be to load the dynamic shadow
; address into a local variable.
; CHECK-LABEL: @test_load
; CHECK: entry:
; CHECK-NOGLOBAL: %[[A:[^ ]*]] = call i8* asm "", "=r,0"([0 x i8]* @__hwasan_shadow)
; CHECK-NOGLOBAL: @llvm.hwasan.check.memaccess(i8* %[[A]]
; CHECK-GLOBAL: load i8*, i8** @__hwasan_shadow_memory_dynamic_address
; "store i64" is only used to update stack history (this input IR intentionally does not use any i64)
; W/o any allocas, the history is not updated, even if it is enabled explicitly with -hwasan-record-stack-history=1
; CHECK-NOT: store i64
; CHECK: ret i32
entry:
%x = load i32, i32* %a, align 4
ret i32 %x
}
declare void @use(i32* %p)
define void @test_alloca() sanitize_hwaddress {
; First instrumentation in the function must be to load the dynamic shadow
; address into a local variable.
; CHECK-LABEL: @test_alloca
; CHECK: entry:
; CHECK-IFUNC: %[[A:[^ ]*]] = call i8* asm "", "=r,0"([0 x i8]* @__hwasan_shadow)
; CHECK-IFUNC: getelementptr i8, i8* %[[A]]
; CHECK-GLOBAL: load i8*, i8** @__hwasan_shadow_memory_dynamic_address
; CHECK-TLS: %[[A:[^ ]*]] = call i8* @llvm.thread.pointer()
; CHECK-TLS: %[[B:[^ ]*]] = getelementptr i8, i8* %[[A]], i32 48
; CHECK-TLS: %[[C:[^ ]*]] = bitcast i8* %[[B]] to i64*
; CHECK-TLS: %[[D:[^ ]*]] = load i64, i64* %[[C]]
; CHECK-TLS: %[[E:[^ ]*]] = ashr i64 %[[D]], 3
; CHECK-NOHISTORY-NOT: store i64
; CHECK-HISTORY: call i64 @llvm.read_register.i64(metadata [[MD:![0-9]*]])
; CHECK-HISTORY: %[[PTR:[^ ]*]] = inttoptr i64 %[[D]] to i64*
; CHECK-HISTORY: store i64 %{{.*}}, i64* %[[PTR]]
; CHECK-HISTORY: %[[D1:[^ ]*]] = ashr i64 %[[D]], 56
; CHECK-HISTORY: %[[D2:[^ ]*]] = shl nuw nsw i64 %[[D1]], 12
; CHECK-HISTORY: %[[D3:[^ ]*]] = xor i64 %[[D2]], -1
; CHECK-HISTORY: %[[D4:[^ ]*]] = add i64 %[[D]], 8
; CHECK-HISTORY: %[[D5:[^ ]*]] = and i64 %[[D4]], %[[D3]]
; CHECK-HISTORY: store i64 %[[D5]], i64* %[[C]]
; CHECK-TLS: %[[F:[^ ]*]] = or i64 %[[D]], 4294967295
; CHECK-TLS: = add i64 %[[F]], 1
; CHECK-HISTORY: = xor i64 %[[E]], 0
; CHECK-NOHISTORY-NOT: store i64
entry:
%x = alloca i32, align 4
call void @use(i32* %x)
ret void
}
; CHECK-HISTORY: [[MD]] = !{!"pc"}