[tsan] Enable tsan for aarch64

This patch enabled TSAN for aarch64 with 39-bit VMA layout.  As defined by
tsan_platform.h the layout used is:

0000 4000 00 - 0200 0000 00: main binary
2000 0000 00 - 4000 0000 00: shadow memory
4000 0000 00 - 5000 0000 00: metainfo
5000 0000 00 - 6000 0000 00: -
6000 0000 00 - 6200 0000 00: traces
6200 0000 00 - 7d00 0000 00: -
7d00 0000 00 - 7e00 0000 00: heap
7e00 0000 00 - 7fff ffff ff: modules and main thread stack

Which gives it about 8GB for main binary, 4GB for heap and 8GB for
modules and main thread stack.

Most of tests are passing, with the exception of:

 * ignore_lib0, ignore_lib1, ignore_lib3 due a kernel limitation for
   no support to make mmap page non-executable.

 * longjmp tests due missing specialized assembly routines.

These tests are xfail for now.

The only tsan issue still showing is:

  rtl/TsanRtlTest/Posix.ThreadLocalAccesses

Which still required further investigation.  The test is disable for
aarch64 for now.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@244055 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 23 insertions, 4 deletions

diff --git a/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc b/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
index 47b27e7e5..b5139ecad 100644
--- a/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
+++ b/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
@@ -14,7 +14,8 @@
 
 
 #include "sanitizer_platform.h"
-#if SANITIZER_LINUX && (defined(__x86_64__) || defined(__mips__))
+#if SANITIZER_LINUX && (defined(__x86_64__) || defined(__mips__) || \
+                        defined(__aarch64__))
 
 #include "sanitizer_stoptheworld.h"
 
@@ -27,6 +28,8 @@
 #include <sys/prctl.h> // for PR_* definitions
 #include <sys/ptrace.h> // for PTRACE_* definitions
 #include <sys/types.h> // for pid_t
+#include <sys/uio.h> // for iovec
+#include <elf.h> // for NT_PRSTATUS
 #if SANITIZER_ANDROID && defined(__arm__)
 # include <linux/user.h>  // for pt_regs
 #else
@@ -469,6 +472,11 @@ typedef pt_regs regs_struct;
 typedef struct user regs_struct;
 #define REG_SP regs[EF_REG29]
 
+#elif defined(__aarch64__)
+typedef struct user_pt_regs regs_struct;
+#define REG_SP sp
+#define ARCH_IOVEC_FOR_GETREGSET
+
 #else
 #error "Unsupported architecture"
 #endif // SANITIZER_ANDROID && defined(__arm__)
@@ -479,8 +487,18 @@ int SuspendedThreadsList::GetRegistersAndSP(uptr index,
   pid_t tid = GetThreadID(index);
   regs_struct regs;
   int pterrno;
-  if (internal_iserror(internal_ptrace(PTRACE_GETREGS, tid, NULL, &regs),
-                       &pterrno)) {
+#ifdef ARCH_IOVEC_FOR_GETREGSET
+  struct iovec regset_io;
+  regset_io.iov_base = &regs;
+  regset_io.iov_len = sizeof(regs_struct);
+  bool isErr = internal_iserror(internal_ptrace(PTRACE_GETREGSET, tid,
+                                (void*)NT_PRSTATUS, (void*)&regset_io),
+                                &pterrno);
+#else
+  bool isErr = internal_iserror(internal_ptrace(PTRACE_GETREGS, tid, NULL,
+                                &regs), &pterrno);
+#endif
+  if (isErr) {
     VReport(1, "Could not get registers from thread %d (errno %d).\n", tid,
             pterrno);
     return -1;
@@ -496,4 +514,5 @@ uptr SuspendedThreadsList::RegisterCount() {
 }
 }  // namespace __sanitizer
 
-#endif  // SANITIZER_LINUX && (defined(__x86_64__) || defined(__mips__))
+#endif  // SANITIZER_LINUX && (defined(__x86_64__) || defined(__mips__)
+        // || defined(__aarch64__)