[compiler-rt] [ASan] Add shadow offset for SystemZ.

[• koriakin]

Summary

This is the compiler-rt counterpart to D19650.

[• koriakin]

Updated to add a fix for ShadowGapTest as well - since it's tied to the shadow offset, let's handle it in the same patch.

compiler-rt/trunk/lib/asan/asan_mapping.h

 //
 // Default Linux/AArch64 (42-bit VMA) mapping:
 // || `[0x10000000000, 0x3ffffffffff]` || highmem    ||
 // || `[0x0a000000000, 0x0ffffffffff]` || highshadow ||
 // || `[0x09000000000, 0x09fffffffff]` || shadowgap  ||
 // || `[0x08000000000, 0x08fffffffff]` || lowshadow  ||
 // || `[0x00000000000, 0x07fffffffff]` || lowmem     ||
 //
+// Default Linux/S390 mapping:
+// || `[0x30000000, 0x7fffffff]` || HighMem    ||
+// || `[0x26000000, 0x2fffffff]` || HighShadow ||
+// || `[0x24000000, 0x25ffffff]` || ShadowGap  ||
+// || `[0x20000000, 0x23ffffff]` || LowShadow  ||
+// || `[0x00000000, 0x1fffffff]` || LowMem     ||
+//
+// Default Linux/SystemZ mapping:
+// || `[0x14000000000000, 0x1fffffffffffff]` || HighMem    ||
+// || `[0x12800000000000, 0x13ffffffffffff]` || HighShadow ||
+// || `[0x12000000000000, 0x127fffffffffff]` || ShadowGap  ||
+// || `[0x10000000000000, 0x11ffffffffffff]` || LowShadow  ||
+// || `[0x00000000000000, 0x0fffffffffffff]` || LowMem     ||
+//
 // Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
 // || `[0x500000000000, 0x7fffffffffff]` || HighMem    ||
 // || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow ||
 // || `[0x480000000000, 0x49ffffffffff]` || ShadowGap  ||
 // || `[0x400000000000, 0x47ffffffffff]` || LowShadow  ||
 // || `[0x000000000000, 0x3fffffffffff]` || LowMem     ||
 //
 // Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000:

 static const u64 kIosShadowOffset32 = 1ULL << 30;  // 0x40000000
 static const u64 kIosShadowOffset64 = 0x120200000;
 static const u64 kIosSimShadowOffset32 = 1ULL << 30;
 static const u64 kIosSimShadowOffset64 = kDefaultShadowOffset64;
 static const u64 kAArch64_ShadowOffset64 = 1ULL << 36;
 static const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000;
 static const u64 kMIPS64_ShadowOffset64 = 1ULL << 37;
 static const u64 kPPC64_ShadowOffset64 = 1ULL << 41;
+static const u64 kSystemZ_ShadowOffset64 = 1ULL << 52;
 static const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30;  // 0x40000000
 static const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46;  // 0x400000000000
 static const u64 kWindowsShadowOffset32 = 3ULL << 28;  // 0x30000000
 
 #define SHADOW_SCALE kDefaultShadowScale
 
 
 #if SANITIZER_WORDSIZE == 32

 #      define SHADOW_OFFSET kIosSimShadowOffset64
 #    else
 #      define SHADOW_OFFSET kIosShadowOffset64
 #    endif
 #  elif defined(__aarch64__)
 #    define SHADOW_OFFSET kAArch64_ShadowOffset64
 #  elif defined(__powerpc64__)
 #    define SHADOW_OFFSET kPPC64_ShadowOffset64
+#  elif defined(__s390x__)
+#    define SHADOW_OFFSET kSystemZ_ShadowOffset64
 #  elif SANITIZER_FREEBSD
 #    define SHADOW_OFFSET kFreeBSD_ShadowOffset64
 #  elif SANITIZER_MAC
 #   define SHADOW_OFFSET kDefaultShadowOffset64
 #  elif defined(__mips64)
 #   define SHADOW_OFFSET kMIPS64_ShadowOffset64
 #  else
 #   define SHADOW_OFFSET kDefaultShort64bitShadowOffset

compiler-rt/trunk/lib/asan/tests/asan_test.cc

 
 #if ASAN_NEEDS_SEGV
 TEST(AddressSanitizer, ShadowGapTest) {
 #if SANITIZER_WORDSIZE == 32
   char *addr = (char*)0x22000000;
 #else
 # if defined(__powerpc64__)
   char *addr = (char*)0x024000800000;
+# elif defined(__s390x__)
+  char *addr = (char*)0x11000000000000;
 # else
   char *addr = (char*)0x0000100000080000;
 # endif
 #endif
   EXPECT_DEATH(*addr = 1, "AddressSanitizer: SEGV on unknown");
 }
 #endif  // ASAN_NEEDS_SEGV
 

compiler-rt/trunk/test/asan/CMakeLists.txt

 set(ASAN_LIT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 set(ASAN_TESTSUITES)
 set(ASAN_DYNAMIC_TESTSUITES)
 
 macro(get_bits_for_arch arch bits)
   if (${arch} MATCHES "i386|i686|arm|mips|mipsel")
     set(${bits} 32)
-  elseif (${arch} MATCHES "x86_64|powerpc64|powerpc64le|aarch64|mips64|mips64el")
+  elseif (${arch} MATCHES "x86_64|powerpc64|powerpc64le|aarch64|mips64|mips64el|s390x")
     set(${bits} 64)
   else()
     message(FATAL_ERROR "Unknown target architecture: ${arch}")
   endif()
 endmacro()
 
 set(ASAN_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
 if(NOT COMPILER_RT_STANDALONE_BUILD)