[Sanitizers] Add support for RISC-V 64-bit

Summary:
This has been tested with gcc trunk on openSUSE Tumbleweed on the HiFive Unleashed.

Patch by Andreas Schwab (schwab)

Reviewers: luismarques

Reviewed By: luismarques

Subscribers: mhorne, emaste, luismarques, asb, mgorny, fedor.sergeev, simoncook, kito-cheng, shiva0217, rogfer01, rkruppe, lenary, s.egerton, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D66870

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375132 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 18 insertions, 7 deletions

diff --git a/lib/sanitizer_common/sanitizer_linux.cpp b/lib/sanitizer_common/sanitizer_linux.cpp
index 0b53da6c3..3807a79b1 100644
--- a/lib/sanitizer_common/sanitizer_linux.cpp
+++ b/lib/sanitizer_common/sanitizer_linux.cpp
@@ -407,7 +407,10 @@ uptr internal_unlink(const char *path) {
 }
 
 uptr internal_rename(const char *oldpath, const char *newpath) {
-#if SANITIZER_USES_CANONICAL_LINUX_SYSCALLS || SANITIZER_OPENBSD
+#if defined(__riscv)
+  return internal_syscall(SYSCALL(renameat2), AT_FDCWD, (uptr)oldpath, AT_FDCWD,
+                          (uptr)newpath, 0);
+#elif SANITIZER_USES_CANONICAL_LINUX_SYSCALLS || SANITIZER_OPENBSD
   return internal_syscall(SYSCALL(renameat), AT_FDCWD, (uptr)oldpath, AT_FDCWD,
                           (uptr)newpath);
 #else
@@ -1972,6 +1975,11 @@ static void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
 # endif
   *bp = ucontext->uc_mcontext.gregs[11];
   *sp = ucontext->uc_mcontext.gregs[15];
+#elif defined(__riscv)
+  ucontext_t *ucontext = (ucontext_t*)context;
+  *pc = ucontext->uc_mcontext.__gregs[REG_PC];
+  *bp = ucontext->uc_mcontext.__gregs[REG_S0];
+  *sp = ucontext->uc_mcontext.__gregs[REG_SP];
 #else
 # error "Unsupported arch"
 #endif
diff --git a/lib/sanitizer_common/sanitizer_platform.h b/lib/sanitizer_common/sanitizer_platform.h
index b45c97535..c68bfa258 100644
--- a/lib/sanitizer_common/sanitizer_platform.h
+++ b/lib/sanitizer_common/sanitizer_platform.h
@@ -255,11 +255,11 @@
 #define SANITIZER_SIGN_EXTENDED_ADDRESSES 0
 #endif
 
-// The AArch64 linux port uses the canonical syscall set as mandated by
-// the upstream linux community for all new ports. Other ports may still
-// use legacy syscalls.
+// The AArch64 and RISC-V linux ports use the canonical syscall set as
+// mandated by the upstream linux community for all new ports. Other ports
+// may still use legacy syscalls.
 #ifndef SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
-# if defined(__aarch64__) && SANITIZER_LINUX
+# if (defined(__aarch64__) || defined(__riscv)) && SANITIZER_LINUX
 # define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 1
 # else
 # define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 0
diff --git a/lib/sanitizer_common/sanitizer_platform_limits_linux.cpp b/lib/sanitizer_common/sanitizer_platform_limits_linux.cpp
index 842bc789f..c51327e12 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_linux.cpp
+++ b/lib/sanitizer_common/sanitizer_platform_limits_linux.cpp
@@ -65,7 +65,7 @@ namespace __sanitizer {
 
 #if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\
                             && !defined(__mips__) && !defined(__s390__)\
-                            && !defined(__sparc__)
+                            && !defined(__sparc__) && !defined(__riscv)
 COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
 #endif
 
diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp b/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
index 84058c708..278baa614 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
+++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
@@ -230,7 +230,7 @@ namespace __sanitizer {
   // has been removed from glibc 2.28.
 #if defined(__aarch64__) || defined(__s390x__) || defined (__mips64) \
   || defined(__powerpc64__) || defined(__arch64__) || defined(__sparcv9) \
-  || defined(__x86_64__)
+  || defined(__x86_64__) || (defined(__riscv) && __riscv_xlen == 64)
 #define SIZEOF_STRUCT_USTAT 32
 #elif defined(__arm__) || defined(__i386__) || defined(__mips__) \
   || defined(__powerpc__) || defined(__s390__) || defined(__sparc__)
diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.h b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
index db2c4f07b..7789bc588 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -98,6 +98,9 @@ const unsigned struct_kernel_stat64_sz = 144;
 const unsigned struct___old_kernel_stat_sz = 0;
 const unsigned struct_kernel_stat_sz = 64;
 const unsigned struct_kernel_stat64_sz = 104;
+#elif defined(__riscv) && __riscv_xlen == 64
+const unsigned struct_kernel_stat_sz = 128;
+const unsigned struct_kernel_stat64_sz = 104;
 #endif
 struct __sanitizer_perf_event_attr {
   unsigned type;