[msan] Teach sanitizers about the PPC64 ptrace syscall

[foad]

Summary

This fixes test/msan/Linux/syscalls.cc, and should also fix the ppc64
sanitizer buildbots which are currently failing in
"make check-sanitizer".

[eugenis]

LGTM

lib/sanitizer_common/sanitizer_platform_interceptors.h

135

Does it pass cpplint with this change? I don't see why, please check.Cpplint is run in check-*san.

lib/sanitizer_common/sanitizer_common_syscalls.inc

 POST_SYSCALL(uselib)(long res, const void *library) {}
 
 PRE_SYSCALL(ni_syscall)() {}
 
 POST_SYSCALL(ni_syscall)(long res) {}
 
 PRE_SYSCALL(ptrace)(long request, long pid, long addr, long data) {
 #if !SANITIZER_ANDROID && \
-    (defined(__i386) || defined(__x86_64) || defined(__mips64))
+    (defined(__i386) || defined(__x86_64) || defined(__mips64) || \
+     defined(__powerpc64__))
   if (data) {
     if (request == ptrace_setregs) {
       PRE_READ((void *)data, struct_user_regs_struct_sz);
     } else if (request == ptrace_setfpregs) {
       PRE_READ((void *)data, struct_user_fpregs_struct_sz);
     } else if (request == ptrace_setfpxregs) {
       PRE_READ((void *)data, struct_user_fpxregs_struct_sz);
     } else if (request == ptrace_setsiginfo) {
       PRE_READ((void *)data, siginfo_t_sz);
     } else if (request == ptrace_setregset) {
       __sanitizer_iovec *iov = (__sanitizer_iovec *)data;
       PRE_READ(iov->iov_base, iov->iov_len);
     }
   }
 #endif
 }
 
 POST_SYSCALL(ptrace)(long res, long request, long pid, long addr, long data) {
 #if !SANITIZER_ANDROID && \
-    (defined(__i386) || defined(__x86_64) || defined(__mips64))
+    (defined(__i386) || defined(__x86_64) || defined(__mips64) || \
+     defined(__powerpc64__))
   if (res >= 0 && data) {
     // Note that this is different from the interceptor in
     // sanitizer_common_interceptors.inc.
     // PEEK* requests return resulting values through data pointer.
     if (request == ptrace_getregs) {
       POST_WRITE((void *)data, struct_user_regs_struct_sz);
     } else if (request == ptrace_getfpregs) {
       POST_WRITE((void *)data, struct_user_fpregs_struct_sz);

lib/sanitizer_common/sanitizer_platform_interceptors.h

 #define SANITIZER_INTERCEPT_RECVMSG SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_GETPEERNAME SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_IOCTL SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_INET_ATON SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_SYSINFO SI_LINUX
 #define SANITIZER_INTERCEPT_READDIR SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_READDIR64 SI_LINUX_NOT_ANDROID
 #define SANITIZER_INTERCEPT_PTRACE SI_LINUX_NOT_ANDROID && \
-   (defined(__i386) || defined (__x86_64) || defined (__mips64))  // NOLINT
+  (defined(__i386) || defined(__x86_64) || defined(__mips64) || \
+    defined(__powerpc64__))
 #define SANITIZER_INTERCEPT_SETLOCALE SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_GETCWD SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_GET_CURRENT_DIR_NAME SI_LINUX_NOT_ANDROID
 #define SANITIZER_INTERCEPT_STRTOIMAX SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_MBSTOWCS SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_MBSNRTOWCS SI_MAC || SI_LINUX_NOT_ANDROID
 #define SANITIZER_INTERCEPT_WCSTOMBS SI_NOT_WINDOWS
 #define SANITIZER_INTERCEPT_WCSNRTOMBS \

lib/sanitizer_common/sanitizer_platform_limits_posix.h

#if SANITIZER_LINUX && !SANITIZER_ANDROID
   };
 # define SANITIZER_HAS_STRUCT_FILE 1
 #else
   typedef void __sanitizer_FILE;
 # define SANITIZER_HAS_STRUCT_FILE 0
 #endif
 
 #if SANITIZER_LINUX && !SANITIZER_ANDROID && \
-  (defined(__i386) || defined(__x86_64) || defined(__mips64))
+  (defined(__i386) || defined(__x86_64) || defined(__mips64) || \
+    defined(__powerpc64__))
   extern unsigned struct_user_regs_struct_sz;
   extern unsigned struct_user_fpregs_struct_sz;
   extern unsigned struct_user_fpxregs_struct_sz;
 
   extern int ptrace_peektext;
   extern int ptrace_peekdata;
   extern int ptrace_peekuser;
   extern int ptrace_getregs;

lib/sanitizer_common/sanitizer_platform_limits_posix.cc

#endif
   }
 
 #if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
   int glob_nomatch = GLOB_NOMATCH;
   int glob_altdirfunc = GLOB_ALTDIRFUNC;
 #endif
 
 #if SANITIZER_LINUX && !SANITIZER_ANDROID && \
-    (defined(__i386) || defined(__x86_64) || defined(__mips64))
-#if defined(__mips64)
+    (defined(__i386) || defined(__x86_64) || defined(__mips64) || \
+      defined(__powerpc64__))
+#if defined(__mips64) || defined(__powerpc64__)
   unsigned struct_user_regs_struct_sz = sizeof(struct pt_regs);
   unsigned struct_user_fpregs_struct_sz = sizeof(elf_fpregset_t);
 #else
   unsigned struct_user_regs_struct_sz = sizeof(struct user_regs_struct);
   unsigned struct_user_fpregs_struct_sz = sizeof(struct user_fpregs_struct);
-#endif // __mips64
-#if (defined(__x86_64) || defined(__mips64))
+#endif // __mips64 || __powerpc64__
+#if defined(__x86_64) || defined(__mips64) || defined(__powerpc64__)
   unsigned struct_user_fpxregs_struct_sz = 0;
 #else
   unsigned struct_user_fpxregs_struct_sz = sizeof(struct user_fpxregs_struct);
-#endif // __x86_64 || __mips64
+#endif // __x86_64 || __mips64 || __powerpc64__
 
   int ptrace_peektext = PTRACE_PEEKTEXT;
   int ptrace_peekdata = PTRACE_PEEKDATA;
   int ptrace_peekuser = PTRACE_PEEKUSER;
   int ptrace_getregs = PTRACE_GETREGS;
   int ptrace_setregs = PTRACE_SETREGS;
   int ptrace_getfpregs = PTRACE_GETFPREGS;
   int ptrace_setfpregs = PTRACE_SETFPREGS;
+#if defined(PTRACE_GETFPXREGS) && defined(PTRACE_SETFPXREGS)
   int ptrace_getfpxregs = PTRACE_GETFPXREGS;
   int ptrace_setfpxregs = PTRACE_SETFPXREGS;
+#else
+  int ptrace_getfpxregs = -1;
+  int ptrace_setfpxregs = -1;
+#endif  // PTRACE_GETFPXREGS/PTRACE_SETFPXREGS
   int ptrace_geteventmsg = PTRACE_GETEVENTMSG;
 #if (defined(PTRACE_GETSIGINFO) && defined(PTRACE_SETSIGINFO)) ||              \
     (defined(PT_GETSIGINFO) && defined(PT_SETSIGINFO))
   int ptrace_getsiginfo = PTRACE_GETSIGINFO;
   int ptrace_setsiginfo = PTRACE_SETSIGINFO;
 #else
   int ptrace_getsiginfo = -1;
   int ptrace_setsiginfo = -1;