[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

1 files changed, 9 insertions, 1 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
index 0b53da6c349..3807a79b1cd 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
+++ b/compiler-rt/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