add support for riscv64

Implements for sv39 and sv48 VMA layout.

Userspace only has access to the bottom half of vma range. The top half is used by kernel.
There is no dedicated vsyscall or heap segment.
PIE program is allocated to start at TASK_SIZE/3*2. Maximum ASLR is ARCH_MMAP_RND_BITS_MAX+PAGE_SHIFT=24+12=36
Loader, vdso and other libraries are allocated below stack from the top.

Also change RestoreAddr to use 4 bits to accommodate MappingRiscv64_48

Reviewed by: MaskRay, dvyukov, asb, StephenFan, luismarques, jrtc27, hiraditya, vitalybuka

Differential Revision: https://reviews.llvm.org/D145214

Author: alexfanqi

clang/lib/Driver/ToolChains/Linux.cpp

@@ -801,7 +801,7 @@ SanitizerMask Linux::getSupportedSanitizers() const {
       IsRISCV64 || IsSystemZ || IsHexagon || IsLoongArch64)
     Res |= SanitizerKind::Leak;
   if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64 || IsSystemZ ||
-      IsLoongArch64)
+      IsLoongArch64 || IsRISCV64)
     Res |= SanitizerKind::Thread;
   if (IsX86_64 || IsSystemZ)
     Res |= SanitizerKind::KernelMemory;

compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake

@@ -66,7 +66,7 @@ set(ALL_PROFILE_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${PPC32} ${PPC
     ${MIPS32} ${MIPS64} ${S390X} ${SPARC} ${SPARCV9} ${HEXAGON}
     ${RISCV32} ${RISCV64} ${LOONGARCH64})
 set(ALL_TSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64} ${PPC64} ${S390X}
-    ${LOONGARCH64})
+    ${LOONGARCH64} ${RISCV64})
 set(ALL_UBSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${RISCV64}
     ${MIPS32} ${MIPS64} ${PPC64} ${S390X} ${SPARC} ${SPARCV9} ${HEXAGON}
     ${LOONGARCH64})

compiler-rt/lib/tsan/rtl/CMakeLists.txt

@@ -2,7 +2,7 @@ include_directories(../..)
 
 set(TSAN_RTL_CFLAGS ${TSAN_CFLAGS})
 append_list_if(COMPILER_RT_HAS_MSSE4_2_FLAG -msse4.2 TSAN_RTL_CFLAGS)
-append_list_if(SANITIZER_LIMIT_FRAME_SIZE -Wframe-larger-than=530
+append_list_if(SANITIZER_LIMIT_FRAME_SIZE -Wframe-larger-than=656
                TSAN_RTL_CFLAGS)
 append_list_if(COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG -Wglobal-constructors
                TSAN_RTL_CFLAGS)
@@ -220,6 +220,10 @@ else()
       set(TSAN_ASM_SOURCES
         tsan_rtl_mips64.S
         )
+    elseif(arch MATCHES "riscv64")
+      set(TSAN_ASM_SOURCES
+        tsan_rtl_riscv64.S
+        )
     elseif(arch MATCHES "s390x")
       set(TSAN_ASM_SOURCES
         tsan_rtl_s390x.S

compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp

@@ -81,6 +81,8 @@ struct ucontext_t {
 #define PTHREAD_ABI_BASE  "GLIBC_2.17"
 #elif SANITIZER_LOONGARCH64
 #define PTHREAD_ABI_BASE  "GLIBC_2.36"
+#elif SANITIZER_RISCV64
+#define PTHREAD_ABI_BASE  "GLIBC_2.27"
 #endif
 
 extern "C" int pthread_attr_init(void *attr);

compiler-rt/lib/tsan/rtl/tsan_platform.h

@@ -377,6 +377,71 @@ struct MappingPPC64_47 {
   static const uptr kMidAppMemEnd = 0;
 };
 
+/*
+C/C++ on linux/riscv64 (39-bit VMA)
+0000 0010 00 - 0200 0000 00: main binary                      ( 8 GB)
+0200 0000 00 - 1000 0000 00: -
+1000 0000 00 - 4000 0000 00: shadow memory                    (64 GB)
+4000 0000 00 - 4800 0000 00: metainfo                         (16 GB)
+4800 0000 00 - 5500 0000 00: -
+5500 0000 00 - 5a00 0000 00: main binary (PIE)                (~8 GB)
+5600 0000 00 - 7c00 0000 00: -
+7d00 0000 00 - 7fff ffff ff: libraries and main thread stack  ( 8 GB)
+
+mmap by default allocates from top downwards
+VDSO sits below loader and above dynamic libraries, within HiApp region.
+Heap starts after program region whose position depends on pie or non-pie.
+Disable tracking them since their locations are not fixed.
+*/
+struct MappingRiscv64_39 {
+  static const uptr kLoAppMemBeg   = 0x0000001000ull;
+  static const uptr kLoAppMemEnd   = 0x0200000000ull;
+  static const uptr kShadowBeg     = 0x1000000000ull;
+  static const uptr kShadowEnd     = 0x2000000000ull;
+  static const uptr kMetaShadowBeg = 0x2000000000ull;
+  static const uptr kMetaShadowEnd = 0x2400000000ull;
+  static const uptr kMidAppMemBeg  = 0x2aaaaaa000ull;
+  static const uptr kMidAppMemEnd  = 0x2c00000000ull;
+  static const uptr kHeapMemBeg    = 0x2c00000000ull;
+  static const uptr kHeapMemEnd    = 0x2c00000000ull;
+  static const uptr kHiAppMemBeg   = 0x3c00000000ull;
+  static const uptr kHiAppMemEnd   = 0x3fffffffffull;
+  static const uptr kShadowMsk     = 0x3800000000ull;
+  static const uptr kShadowXor     = 0x0800000000ull;
+  static const uptr kShadowAdd     = 0x0000000000ull;
+  static const uptr kVdsoBeg       = 0x4000000000ull;
+};
+
+/*
+C/C++ on linux/riscv64 (48-bit VMA)
+0000 0000 1000 - 0500 0000 0000: main binary                      ( 5 TB)
+0500 0000 0000 - 2000 0000 0000: -
+2000 0000 0000 - 4000 0000 0000: shadow memory                    (32 TB)
+4000 0000 0000 - 4800 0000 0000: metainfo                         ( 8 TB)
+4800 0000 0000 - 5555 5555 5000: -
+5555 5555 5000 - 5a00 0000 0000: main binary (PIE)                (~5 TB)
+5a00 0000 0000 - 7a00 0000 0000: -
+7a00 0000 0000 - 7fff ffff ffff: libraries and main thread stack  ( 5 TB)
+*/
+struct MappingRiscv64_48 {
+  static const uptr kLoAppMemBeg   = 0x000000001000ull;
+  static const uptr kLoAppMemEnd   = 0x050000000000ull;
+  static const uptr kShadowBeg     = 0x200000000000ull;
+  static const uptr kShadowEnd     = 0x400000000000ull;
+  static const uptr kMetaShadowBeg = 0x400000000000ull;
+  static const uptr kMetaShadowEnd = 0x480000000000ull;
+  static const uptr kMidAppMemBeg  = 0x555555555000ull;
+  static const uptr kMidAppMemEnd  = 0x5a0000000000ull;
+  static const uptr kHeapMemBeg    = 0x5a0000000000ull;
+  static const uptr kHeapMemEnd    = 0x5a0000000000ull;
+  static const uptr kHiAppMemBeg   = 0x7a0000000000ull;
+  static const uptr kHiAppMemEnd   = 0x7fffffffffffull;
+  static const uptr kShadowMsk     = 0x700000000000ull;
+  static const uptr kShadowXor     = 0x100000000000ull;
+  static const uptr kShadowAdd     = 0x000000000000ull;
+  static const uptr kVdsoBeg       = 0x800000000000ull;
+};
+
 /*
 C/C++ on linux/s390x
 While the kernel provides a 64-bit address space, we have to restrict ourselves
@@ -665,6 +730,13 @@ ALWAYS_INLINE auto SelectMapping(Arg arg) {
   }
 #  elif defined(__mips64)
   return Func::template Apply<MappingMips64_40>(arg);
+#  elif SANITIZER_RISCV64
+  switch (vmaSize) {
+    case 39:
+      return Func::template Apply<MappingRiscv64_39>(arg);
+    case 48:
+      return Func::template Apply<MappingRiscv64_48>(arg);
+  }
 #  elif defined(__s390x__)
   return Func::template Apply<MappingS390x>(arg);
 #  else
@@ -686,6 +758,8 @@ void ForEachMapping() {
   Func::template Apply<MappingPPC64_44>();
   Func::template Apply<MappingPPC64_46>();
   Func::template Apply<MappingPPC64_47>();
+  Func::template Apply<MappingRiscv64_39>();
+  Func::template Apply<MappingRiscv64_48>();
   Func::template Apply<MappingS390x>();
   Func::template Apply<MappingGo48>();
   Func::template Apply<MappingGoWindows>();
@@ -894,7 +968,7 @@ struct RestoreAddrImpl {
         Mapping::kMidAppMemEnd, Mapping::kHiAppMemBeg, Mapping::kHiAppMemEnd,
         Mapping::kHeapMemBeg,   Mapping::kHeapMemEnd,
     };
-    const uptr indicator = 0x0e0000000000ull;
+    const uptr indicator = 0x0f0000000000ull;
     const uptr ind_lsb = 1ull << LeastSignificantSetBitIndex(indicator);
     for (uptr i = 0; i < ARRAY_SIZE(ranges); i += 2) {
       uptr beg = ranges[i];

compiler-rt/lib/tsan/rtl/tsan_platform_linux.cpp

@@ -267,6 +267,16 @@ void InitializePlatformEarly() {
     Die();
   }
 # endif
+#elif SANITIZER_RISCV64
+  // the bottom half of vma is allocated for userspace
+  vmaSize = vmaSize + 1;
+# if !SANITIZER_GO
+  if (vmaSize != 39 && vmaSize != 48) {
+    Printf("FATAL: ThreadSanitizer: unsupported VMA range\n");
+    Printf("FATAL: Found %zd - Supported 39 and 48\n", vmaSize);
+    Die();
+  }
+# endif
 #endif
 }
 
@@ -399,6 +409,8 @@ static uptr UnmangleLongJmpSp(uptr mangled_sp) {
   return mangled_sp ^ xor_key;
 #elif defined(__mips__)
   return mangled_sp;
+#elif SANITIZER_RISCV64
+  return mangled_sp;
 #elif defined(__s390x__)
   // tcbhead_t.stack_guard
   uptr xor_key = ((uptr *)__builtin_thread_pointer())[5];
@@ -429,6 +441,8 @@ static uptr UnmangleLongJmpSp(uptr mangled_sp) {
 #  define LONG_JMP_SP_ENV_SLOT 1
 # elif defined(__mips64)
 #  define LONG_JMP_SP_ENV_SLOT 1
+# elif SANITIZER_RISCV64
+#  define LONG_JMP_SP_ENV_SLOT 13
 # elif defined(__s390x__)
 #  define LONG_JMP_SP_ENV_SLOT 9
 # else

compiler-rt/lib/tsan/rtl/tsan_rtl.h

@@ -57,7 +57,7 @@ namespace __tsan {
 #if !SANITIZER_GO
 struct MapUnmapCallback;
 #if defined(__mips64) || defined(__aarch64__) || defined(__loongarch__) || \
-    defined(__powerpc__)
+    defined(__powerpc__) || SANITIZER_RISCV64
 
 struct AP32 {
   static const uptr kSpaceBeg = 0;

compiler-rt/test/tsan/map32bit.cpp

@@ -13,6 +13,7 @@
 // XFAIL: target=powerpc64{{.*}}
 // XFAIL: target=s390x{{.*}}
 // XFAIL: target=loongarch64{{.*}}
+// XFAIL: target=riscv64{{.*}}
 
 // MAP_32BIT doesn't exist on OS X and NetBSD.
 // UNSUPPORTED: darwin,target={{.*netbsd.*}}

compiler-rt/test/tsan/mmap_large.cpp

@@ -17,7 +17,8 @@
 int main() {
 #ifdef __x86_64__
   const size_t kLog2Size = 39;
-#elif defined(__mips64) || defined(__aarch64__) || defined(__loongarch_lp64)
+#elif defined(__mips64) || defined(__aarch64__) ||                             \
+    defined(__loongarch_lp64) || (defined(__riscv) && __riscv_xlen == 64)
   const size_t kLog2Size = 32;
 #elif defined(__powerpc64__)
   const size_t kLog2Size = 39;

compiler-rt/test/tsan/test.h

@@ -76,6 +76,8 @@ unsigned long long monotonic_clock_ns() {
 const int kPCInc = 1;
 #elif defined(__sparc__) || defined(__mips__)
 const int kPCInc = 8;
+#elif defined(__riscv) && __riscv_xlen == 64
+const int kPCInc = 2;
 #else
 const int kPCInc = 4;
 #endif