3 files changed, 29 insertions, 1 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common.h b/compiler-rt/lib/sanitizer_common/sanitizer_common.h
index 27cc3082537..0a98012b679 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common.h
@@ -23,12 +23,25 @@ namespace __sanitizer {
 // Constants.
 const uptr kWordSize = __WORDSIZE / 8;
 const uptr kWordSizeInBits = 8 * kWordSize;
+#if defined(__powerpc__) || defined(__powerpc64__)
+// Current PPC64 kernels use 64K pages sizes, but they can be
+// configured with 4K or even other sizes.
+// We may want to use getpagesize() or sysconf(_SC_PAGESIZE) here rather than
+// hardcoding the values, but today these values need to be compile-time
+// constants.
+const uptr kPageSizeBits = 16;
+const uptr kPageSize = 1UL << kPageSizeBits;
+const uptr kCacheLineSize = 128;
+const uptr kMmapGranularity = kPageSize;
+#elif !defined(_WIN32)
 const uptr kPageSizeBits = 12;
 const uptr kPageSize = 1UL << kPageSizeBits;
 const uptr kCacheLineSize = 64;
-#ifndef _WIN32
 const uptr kMmapGranularity = kPageSize;
 #else
+const uptr kPageSizeBits = 12;
+const uptr kPageSize = 1UL << kPageSizeBits;
+const uptr kCacheLineSize = 64;
 const uptr kMmapGranularity = 1UL << 16;
 #endif
 
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cc b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cc
index 28ee9600d0a..964c5241fac 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cc
@@ -33,7 +33,12 @@ static uptr patch_pc(uptr pc) {
   // Cancel Thumb bit.
   pc = pc & (~1);
 #endif
+#if defined(__powerpc__) || defined(__powerpc64__)
+  // PCs are always 4 byte aligned.
+  return pc - 4;
+#else
   return pc - 1;
+#endif
 }
 
 static void PrintStackFramePrefix(uptr frame_num, uptr pc) {
@@ -138,6 +143,14 @@ void StackTrace::FastUnwindStack(uptr pc, uptr bp,
   }
 }
 
+void StackTrace::PopStackFrames(uptr count) {
+  CHECK(size > count);
+  size -= count;
+  for (uptr i = 0; i < size; i++) {
+    trace[i] = trace[i + count];
+  }
+}
+
 // On 32-bits we don't compress stack traces.
 // On 64-bits we compress stack traces: if a given pc differes slightly from
 // the previous one, we record a 31-bit offset instead of the full pc.
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h
index b823a7e0d85..fe2dcf06424 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h
@@ -45,6 +45,8 @@ struct StackTrace {
 
   void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom);
 
+  void PopStackFrames(uptr count);
+
   static uptr GetCurrentPc();
 
   static uptr CompressStack(StackTrace *stack,