Disable ASan on Thread::InstallImplicitProtection.
This function reads random stack locations and confuses ASan.
Bug: 21785137
Change-Id: Iaaee6032a651618e5275ab46e6e8f886df60a5d0
diff --git a/runtime/base/memory_tool.h b/runtime/base/memory_tool.h
index 36469b8..31162a3 100644
--- a/runtime/base/memory_tool.h
+++ b/runtime/base/memory_tool.h
@@ -30,6 +30,7 @@
#define MEMORY_TOOL_MAKE_NOACCESS(p, s) __asan_poison_memory_region(p, s)
#define MEMORY_TOOL_MAKE_UNDEFINED(p, s) __asan_unpoison_memory_region(p, s)
#define MEMORY_TOOL_MAKE_DEFINED(p, s) __asan_unpoison_memory_region(p, s)
+#define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
#define RUNNING_ON_MEMORY_TOOL 1U
constexpr bool kMemoryToolIsValgrind = false;
constexpr bool kMemoryToolDetectsLeaks = true;
@@ -43,6 +44,7 @@
#define MEMORY_TOOL_MAKE_NOACCESS(p, s) VALGRIND_MAKE_MEM_NOACCESS(p, s)
#define MEMORY_TOOL_MAKE_UNDEFINED(p, s) VALGRIND_MAKE_MEM_UNDEFINED(p, s)
#define MEMORY_TOOL_MAKE_DEFINED(p, s) VALGRIND_MAKE_MEM_DEFINED(p, s)
+#define ATTRIBUTE_NO_SANITIZE_ADDRESS
#define RUNNING_ON_MEMORY_TOOL RUNNING_ON_VALGRIND
constexpr bool kMemoryToolIsValgrind = true;
constexpr bool kMemoryToolDetectsLeaks = true;
diff --git a/runtime/thread.cc b/runtime/thread.cc
index 7b70be8..8de16af 100644
--- a/runtime/thread.cc
+++ b/runtime/thread.cc
@@ -358,6 +358,10 @@
// to make sure the pages for the stack are mapped in before we call mprotect. We do
// this by reading every page from the stack bottom (highest address) to the stack top.
// We then madvise this away.
+
+// AddressSanitizer does not like the part of this functions that reads every stack page.
+// Looks a lot like an out-of-bounds access.
+ATTRIBUTE_NO_SANITIZE_ADDRESS
void Thread::InstallImplicitProtection() {
uint8_t* pregion = tlsPtr_.stack_begin - kStackOverflowProtectedSize;
uint8_t* stack_himem = tlsPtr_.stack_end;
