[compiler-rt] r209879 - [asan] Enable ASan on PowerPC.

[Evgeniy Stepanov]

Author: eugenis
Date: Fri May 30 03:52:03 2014
New Revision: 209879

URL: http://llvm.org/viewvc/llvm-project?rev=209879&view=rev
Log:
[asan] Enable ASan on PowerPC.

Patch by Peter Bergner.

Modified:
    compiler-rt/trunk/lib/asan/asan_linux.cc
    compiler-rt/trunk/lib/asan/asan_mapping.h
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_stacktrace.cc

Modified: compiler-rt/trunk/lib/asan/asan_linux.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/asan_linux.cc?rev=209879&r1=209878&r2=209879&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/asan_linux.cc (original)
+++ compiler-rt/trunk/lib/asan/asan_linux.cc Fri May 30 03:52:03 2014
@@ -188,6 +188,13 @@ void GetPcSpBp(void *context, uptr *pc,
   *bp = ucontext->uc_mcontext.gregs[REG_EBP];
   *sp = ucontext->uc_mcontext.gregs[REG_ESP];
 # endif
+#elif defined(__powerpc__) || defined(__powerpc64__)
+  ucontext_t *ucontext = (ucontext_t*)context;
+  *pc = ucontext->uc_mcontext.regs->nip;
+  *sp = ucontext->uc_mcontext.regs->gpr[PT_R1];
+  // The powerpc{,64}-linux ABIs do not specify r31 as the frame
+  // pointer, but GCC always uses r31 when we need a frame pointer.
+  *bp = ucontext->uc_mcontext.regs->gpr[PT_R31];
 #elif defined(__sparc__)
   ucontext_t *ucontext = (ucontext_t*)context;
   uptr *stk_ptr;

Modified: compiler-rt/trunk/lib/asan/asan_mapping.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/asan_mapping.h?rev=209879&r1=209878&r2=209879&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/asan_mapping.h (original)
+++ compiler-rt/trunk/lib/asan/asan_mapping.h Fri May 30 03:52:03 2014
@@ -87,6 +87,7 @@ static const u64 kDefaultShadowOffset64
 static const u64 kDefaultShort64bitShadowOffset = 0x7FFF8000;  // < 2G.
 static const u64 kAArch64_ShadowOffset64 = 1ULL << 36;
 static const u64 kMIPS32_ShadowOffset32 = 0x0aaa8000;
+static const u64 kPPC64_ShadowOffset64 = 1ULL << 41;
 static const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30;  // 0x40000000
 static const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46;  // 0x400000000000
 
@@ -109,6 +110,8 @@ static const u64 kFreeBSD_ShadowOffset64
 # else
 #  if defined(__aarch64__)
 #    define SHADOW_OFFSET kAArch64_ShadowOffset64
+#  elif defined(__powerpc64__)
+#    define SHADOW_OFFSET kPPC64_ShadowOffset64
 #  elif SANITIZER_FREEBSD
 #    define SHADOW_OFFSET kFreeBSD_ShadowOffset64
 #  elif SANITIZER_MAC

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h?rev=209879&r1=209878&r2=209879&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h Fri May 30 03:52:03 2014
@@ -28,7 +28,11 @@ struct StackTrace;
 const uptr kWordSize = SANITIZER_WORDSIZE / 8;
 const uptr kWordSizeInBits = 8 * kWordSize;
 
-const uptr kCacheLineSize = 64;
+#if defined(__powerpc__) || defined(__powerpc64__)
+  const uptr kCacheLineSize = 128;
+#else
+  const uptr kCacheLineSize = 64;
+#endif
 
 const uptr kMaxPathLength = 512;
 

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_stacktrace.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_stacktrace.cc?rev=209879&r1=209878&r2=209879&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_stacktrace.cc (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_stacktrace.cc Fri May 30 03:52:03 2014
@@ -18,11 +18,13 @@
 namespace __sanitizer {
 
 uptr StackTrace::GetPreviousInstructionPc(uptr pc) {
-#ifdef __arm__
+#if defined(__arm__)
   // Cancel Thumb bit.
   pc = pc & (~1);
-#endif
-#if defined(__sparc__)
+#elif defined(__powerpc__) || defined(__powerpc64__)
+  // PCs are always 4 byte aligned.
+  return pc - 4;
+#elif defined(__sparc__)
   return pc - 8;
 #else
   return pc - 1;