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authorKostya Serebryany <kcc@google.com>2014-02-10 07:37:04 +0000
committerKostya Serebryany <kcc@google.com>2014-02-10 07:37:04 +0000
commit8cab11a9f8e23acc0ca3599a53aea19bf75ec1bf (patch)
treeb34d41cd48a65ac3ae9c0694e8760b2fe96e254c
parent27ef6eec41f28383581cd4ce9c7d64bba3e5a101 (diff)
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[asan] support for FreeBSD, LLVM part. patch by Viktor Kutuzov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201067 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r--lib/Transforms/Instrumentation/AddressSanitizer.cpp9
-rw-r--r--test/Instrumentation/AddressSanitizer/freebsd.ll29
2 files changed, 36 insertions, 2 deletions
diff --git a/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 377d0d87d1..cf10af61d2 100644
--- a/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -60,6 +60,8 @@ static const uint64_t kDefaultShadowOffset64 = 1ULL << 44;
static const uint64_t kDefaultShort64bitShadowOffset = 0x7FFF8000; // < 2G.
static const uint64_t kPPC64_ShadowOffset64 = 1ULL << 41;
static const uint64_t kMIPS32_ShadowOffset32 = 0x0aaa8000;
+static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30;
+static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46;
static const size_t kMinStackMallocSize = 1 << 6; // 64B
static const size_t kMaxStackMallocSize = 1 << 16; // 64K
@@ -240,6 +242,7 @@ static ShadowMapping getShadowMapping(const Module &M, int LongSize) {
llvm::Triple TargetTriple(M.getTargetTriple());
bool IsAndroid = TargetTriple.getEnvironment() == llvm::Triple::Android;
bool IsMacOSX = TargetTriple.getOS() == llvm::Triple::MacOSX;
+ bool IsFreeBSD = TargetTriple.getOS() == llvm::Triple::FreeBSD;
bool IsPPC64 = TargetTriple.getArch() == llvm::Triple::ppc64 ||
TargetTriple.getArch() == llvm::Triple::ppc64le;
bool IsX86_64 = TargetTriple.getArch() == llvm::Triple::x86_64;
@@ -255,11 +258,13 @@ static ShadowMapping getShadowMapping(const Module &M, int LongSize) {
Mapping.Offset = IsAndroid ? 0 :
(LongSize == 32 ?
- (IsMIPS32 ? kMIPS32_ShadowOffset32 : kDefaultShadowOffset32) :
+ (IsMIPS32 ? kMIPS32_ShadowOffset32 :
+ (IsFreeBSD ? kFreeBSD_ShadowOffset32 : kDefaultShadowOffset32)) :
IsPPC64 ? kPPC64_ShadowOffset64 : kDefaultShadowOffset64);
if (!IsAndroid && ClShort64BitOffset && IsX86_64 && !IsMacOSX) {
assert(LongSize == 64);
- Mapping.Offset = kDefaultShort64bitShadowOffset;
+ Mapping.Offset = (IsFreeBSD ?
+ kFreeBSD_ShadowOffset64 : kDefaultShort64bitShadowOffset);
}
if (!IsAndroid && ClMappingOffsetLog >= 0) {
// Zero offset log is the special case.
diff --git a/test/Instrumentation/AddressSanitizer/freebsd.ll b/test/Instrumentation/AddressSanitizer/freebsd.ll
new file mode 100644
index 0000000000..26fee787d9
--- /dev/null
+++ b/test/Instrumentation/AddressSanitizer/freebsd.ll
@@ -0,0 +1,29 @@
+; RUN: opt < %s -asan -S \
+; RUN: -mtriple=i386-unknown-freebsd \
+; RUN: -default-data-layout="e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128" | \
+; RUN: FileCheck --check-prefix=CHECK-32 %s
+
+; RUN: opt < %s -asan -S \
+; RUN: -mtriple=x86_64-unknown-freebsd \
+; RUN: -default-data-layout="e-m:e-i64:64-f80:128-n8:16:32:64-S128" | \
+; RUN: FileCheck --check-prefix=CHECK-64 %s
+
+define i32 @read_4_bytes(i32* %a) sanitize_address {
+entry:
+ %tmp1 = load i32* %a, align 4
+ ret i32 %tmp1
+}
+
+; CHECK-32: @read_4_bytes
+; CHECK-32-NOT: ret
+; Check for ASAN's Offset for 32-bit (2^30 or 0x40000000)
+; CHECK-32: lshr {{.*}} 3
+; CHECK-32-NEXT: {{1073741824}}
+; CHECK-32: ret
+
+; CHECK-64: @read_4_bytes
+; CHECK-64-NOT: ret
+; Check for ASAN's Offset for 64-bit (2^46 or 0x400000000000)
+; CHECK-64: lshr {{.*}} 3
+; CHECK-64-NEXT: {{70368744177664}}
+; CHECK-64: ret