[NaCl SDK] Compile for naclio for Bionic

native_client_sdk/src/libraries/nacl_io/kernel_wrap_bionic.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include <sys/types.h>  // Include something that will define __GLIBC__.
+#include <sys/types.h>  // Include something that will define __BIONIC__.
 
 // The entire file is wrapped in this #if. We do this so this .cc file can be
 // compiled, even on a non-glibc build.

[binji, 2014/04/02 18:35:53]

non-bionic

[noelallen1, 2014/04/03 17:58:52]

Done.

-#if defined(__native_client__) && defined(__GLIBC__)
 
+#if defined(__native_client__) && defined(__BIONIC__)
 #include "nacl_io/kernel_wrap.h"
 
 #include <alloca.h>
 #include <assert.h>
 #include <dirent.h>
 #include <errno.h>
-#include <irt.h>
-#include <irt_syscalls.h>
-#include <nacl_stat.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <irt_syscalls.h>

[binji, 2014/04/02 18:35:53]

alphabetize? If this has to come after the previous headers, add a newline
between so it doesn't get caught by the presubmit check.

[noelallen1, 2014/04/03 17:58:52]

Done.

 
 #include "nacl_io/kernel_intercept.h"
 #include "nacl_io/kernel_wrap_real.h"
 #include "nacl_io/osmman.h"
 
-
 namespace {
 
 void stat_to_nacl_stat(const struct stat* buf, nacl_abi_stat* nacl_buf) {
   memset(nacl_buf, 0, sizeof(struct nacl_abi_stat));
   nacl_buf->nacl_abi_st_dev = buf->st_dev;
   nacl_buf->nacl_abi_st_ino = buf->st_ino;
   nacl_buf->nacl_abi_st_mode = buf->st_mode;
   nacl_buf->nacl_abi_st_nlink = buf->st_nlink;
   nacl_buf->nacl_abi_st_uid = buf->st_uid;
   nacl_buf->nacl_abi_st_gid = buf->st_gid;
@@ skipping 65 matching lines @@
 
 // Macro to get the WRAP function
 #define WRAP(name) __nacl_irt_##name##_wrap
 
 // Declare REAL function pointer.
 #define DECLARE_REAL_PTR(name) \
   typeof(__nacl_irt_##name) REAL(name);
 
 // Assign the REAL function pointer.
 #define ASSIGN_REAL_PTR(name) \
-  assert(__nacl_irt_##name != NULL); \
   REAL(name) = __nacl_irt_##name;
 
 // Switch IRT's pointer to the REAL pointer
 #define USE_REAL(name) \
   __nacl_irt_##name = (typeof(__nacl_irt_##name)) REAL(name)
 
 // Switch IRT's pointer to the WRAP function
 #define USE_WRAP(name) \
   __nacl_irt_##name = (typeof(__nacl_irt_##name)) WRAP(name)
 
 
 #define EXPAND_SYMBOL_LIST_OPERATION(OP) \
   OP(chdir); \
   OP(close); \
   OP(dup); \
-  OP(dup2); \
+  OP(dup2);  \

[binji, 2014/04/02 18:35:53]

nit: remove extra space

[noelallen1, 2014/04/03 17:58:52]

Done.

   OP(exit); \
+  OP(fchdir); \
+  OP(fchmod); \
+  OP(fdatasync); \
   OP(fstat); \
-  OP(getcwd); \
-  OP(getdents); \
+  OP(fsync); \
+  OP(getcwd);  \
+  OP(getdents);  \
+  OP(isatty); \
+  OP(lstat); \
   OP(mkdir); \
+  OP(mmap); \
+  OP(munmap); \
   OP(open); \
-  OP(poll);\
+  OP(open_resource); \
+  OP(poll); \
   OP(read); \
+  OP(readlink); \
   OP(rmdir); \
   OP(seek); \
   OP(stat); \
-  OP(select); \
+  OP(truncate); \
   OP(write); \
-  OP(mmap); \
-  OP(munmap); \
-  OP(open_resource);
+
 
 EXPAND_SYMBOL_LIST_OPERATION(DECLARE_REAL_PTR);
 
-int WRAP(chdir)(const char* pathname) {
+int WRAP(chdir) (const char* pathname) {

[binji, 2014/04/02 18:35:53]

nit: remove extra space

[noelallen1, 2014/04/03 17:58:52]

Done.

   return (ki_chdir(pathname)) ? errno : 0;
 }
 
 int WRAP(close)(int fd) {
   return (ki_close(fd) < 0) ? errno : 0;
 }
 
 int WRAP(dup)(int fd, int* newfd) NOTHROW {
   *newfd = ki_dup(fd);
   return (*newfd < 0) ? errno : 0;
 }
 
 int WRAP(dup2)(int fd, int newfd) NOTHROW {
   return (ki_dup2(fd, newfd) < 0) ? errno : 0;
 }
 
 void WRAP(exit)(int status) {
   ki_exit(status);
 }
 
+int WRAP(fchdir)(int fd) NOTHROW {
+  return (ki_fchdir(fd)) ? errno : 0;
+}
+
+int WRAP(fchmod)(int fd, mode_t mode) NOTHROW {
+  return (ki_fchmod(fd, mode)) ? errno : 0;
+}
+
+int WRAP(fdatasync)(int fd) NOTHROW {
+  return (ki_fdatasync(fd)) ? errno : 0;
+}
+
 int WRAP(fstat)(int fd, struct nacl_abi_stat *nacl_buf) {
   struct stat buf;
   memset(&buf, 0, sizeof(struct stat));
   int res = ki_fstat(fd, &buf);
   if (res < 0)
     return errno;
   stat_to_nacl_stat(&buf, nacl_buf);
   return 0;
 }
 
-int WRAP(getcwd)(char* buf, size_t size) {
-  if (ki_getcwd(buf, size) == NULL)
-    return errno;
-  return 0;
+int WRAP(fsync)(int fd) NOTHROW {
+  return (ki_fsync(fd)) ? errno : 0;
+}
+
+char* WRAP(getcwd)(char* buf, size_t size) {
+  return ki_getcwd(buf, size);

[binji, 2014/04/02 18:35:53]

why doesn't this return errno? Is this wrapped function different in bionic?

[noelallen1, 2014/04/03 17:58:52]

Done.

 }
 
 int WRAP(getdents)(int fd, dirent* nacl_buf, size_t nacl_count, size_t *nread) {
   int nacl_offset = 0;
   // "buf" contains dirent(s); "nacl_buf" contains nacl_abi_dirent(s).
   // nacl_abi_dirent(s) are smaller than dirent(s), so nacl_count bytes buffer
   // is enough
   char* buf = (char*)alloca(nacl_count);
   int offset = 0;
   int count;
@@ skipping 12 matching lines @@
     memcpy(nacl_d->nacl_abi_d_name, d->d_name, d_name_len);
 
     offset += d->d_reclen;
     nacl_offset += nacl_d->nacl_abi_d_reclen;
   }
 
   *nread = nacl_offset;
   return 0;
 }
 
+int WRAP(isatty)(int fd, int* result) {
+  *result = ki_isatty(fd);
+  if (*result == 1)
+    return errno;
+  return 0;
+}
+
+int WRAP(lstat)(const char *path, struct nacl_abi_stat* nacl_buf) {
+  struct stat buf;
+  memset(&buf, 0, sizeof(struct stat));
+  int res = ki_lstat(path, &buf);
+  if (res < 0)
+    return errno;
+  stat_to_nacl_stat(&buf, nacl_buf);
+  return 0;
+}
+
 int WRAP(mkdir)(const char* pathname, mode_t mode) {
   return (ki_mkdir(pathname, mode)) ? errno : 0;
 }
 
 int WRAP(mmap)(void** addr, size_t length, int prot, int flags, int fd,
-               off_t offset) {
+               int64_t offset) {
   if (flags & MAP_ANONYMOUS)
     return REAL(mmap)(addr, length, prot, flags, fd, offset);
 
   *addr = ki_mmap(*addr, length, prot, flags, fd, offset);
   return *addr == (void*)-1 ? errno : 0;
 }
 
 int WRAP(munmap)(void* addr, size_t length) {
   // Always let the real munmap run on the address range. It is not an error if
   // there are no mapped pages in that range.
@@ skipping 16 matching lines @@
   return (*count < 0) ? errno : 0;
 
 }
 
 int WRAP(read)(int fd, void *buf, size_t count, size_t *nread) {
   ssize_t signed_nread = ki_read(fd, buf, count);
   *nread = static_cast<size_t>(signed_nread);
   return (signed_nread < 0) ? errno : 0;
 }
 
+int WRAP(readlink)(const char* path, char* buf, size_t count, size_t* nread) {
+  ssize_t signed_nread = ki_readlink(path, buf, count);
+  *nread = static_cast<size_t>(signed_nread);
+  return (signed_nread < 0) ? errno : 0;
+}
+
 int WRAP(rmdir)(const char* pathname) {
   return (ki_rmdir(pathname) < 0) ? errno : 0;
 }
 
-int WRAP(seek)(int fd, off_t offset, int whence, off_t* new_offset) {
+int WRAP(seek)(int fd, off64_t offset, int whence, int64_t* new_offset) {
   *new_offset = ki_lseek(fd, offset, whence);
   return (*new_offset < 0) ? errno : 0;
 }
 
 int WRAP(select)(int nfds, fd_set* readfds, fd_set* writefds,
                  fd_set* exceptfds, struct timeval* timeout, int* count) {
   *count = ki_select(nfds, readfds, writefds, exceptfds, timeout);
   return (*count < 0) ? errno : 0;
 }
 
 int WRAP(stat)(const char *pathname, struct nacl_abi_stat *nacl_buf) {
   struct stat buf;
   memset(&buf, 0, sizeof(struct stat));
   int res = ki_stat(pathname, &buf);
   if (res < 0)
     return errno;
   stat_to_nacl_stat(&buf, nacl_buf);
   return 0;
 }
 
+int WRAP(truncate)(const char *name, int64_t len) {
+  return (ki_truncate(name, len)) ? errno : 0;
+}
+
 int WRAP(write)(int fd, const void* buf, size_t count, size_t* nwrote) {
   ssize_t signed_nwrote = ki_write(fd, buf, count);
   *nwrote = static_cast<size_t>(signed_nwrote);
   return (signed_nwrote < 0) ? errno : 0;
 }
 
 static void assign_real_pointers() {
   static bool assigned = false;
   if (!assigned) {
     EXPAND_SYMBOL_LIST_OPERATION(ASSIGN_REAL_PTR)
     assigned = true;
   }
 }
 
 #define CHECK_REAL(func) \
   if (!REAL(func)) \
     assign_real_pointers();
 
 // "real" functions, i.e. the unwrapped original functions.
 
 int _real_close(int fd) {
   CHECK_REAL(close);
   return REAL(close)(fd);
 }
 
 void _real_exit(int status) {
-  CHECK_REAL(exit);
   REAL(exit)(status);
 }
 
+int _real_fchdir(int fd) {
+  CHECK_REAL(fchdir);
+  return REAL(fchdir)(fd);
+}
+
+int _real_fchmod(int fd, mode_t mode) {
+  CHECK_REAL(fchmod);
+  return REAL(fchmod)(fd, mode);
+}
+
+int _real_fdatasync(int fd) {
+  CHECK_REAL(fdatasync);
+  return REAL(fdatasync)(fd);
+}
+
 int _real_fstat(int fd, struct stat* buf) {
   struct nacl_abi_stat st;
   CHECK_REAL(fstat);
-  int err = REAL(fstat)(fd, &st);
+
+  int err = REAL(fstat)(fd, (struct stat*) &st);
   if (err) {
     errno = err;
     return -1;
   }
 
   nacl_stat_to_stat(&st, buf);
   return 0;
 }
 
+int _real_fsync(int fd) {
+  CHECK_REAL(fsync);
+  return REAL(fsync)(fd);
+}
+
 int _real_getdents(int fd, void* buf, size_t count, size_t* nread) {
   // "buf" contains dirent(s); "nacl_buf" contains nacl_abi_dirent(s).
   // See WRAP(getdents) above.
   char* nacl_buf = (char*)alloca(count);
   size_t offset = 0;
   size_t nacl_offset = 0;
   size_t nacl_nread;
   CHECK_REAL(getdents);
   int err = REAL(getdents)(fd, (dirent*)nacl_buf, count, &nacl_nread);
   if (err)
@@ skipping 10 matching lines @@
     memcpy(d->d_name, nacl_d->nacl_abi_d_name, d_name_len);
 
     offset += d->d_reclen;
     offset += nacl_d->nacl_abi_d_reclen;
   }
 
   *nread = offset;
   return 0;
 }
 
-int _real_lseek(int fd, off_t offset, int whence, off_t* new_offset) {
+int _real_isatty(int fd, int* result) {
+  *result = isatty(fd);
+  return *result ? 0 : -1;
+}
+
+int _real_lseek(int fd, int64_t offset, int whence, int64_t* new_offset) {
   CHECK_REAL(seek);
-  return REAL(seek)(fd, offset, whence, new_offset);
+  nacl_abi_off_t nacl_new_offs;
+  int ret = REAL(seek)(fd, offset, whence, &nacl_new_offs);
+  *new_offset = static_cast<off_t>(nacl_new_offs);
+  return ret;
 }
 
+int _real_lstat(const char* path, struct stat* buf) {
+  struct nacl_abi_stat st;
+  CHECK_REAL(fstat);
+
+  int err = REAL(lstat)(path, (struct stat*) &st);

[binji, 2014/04/02 18:35:53]

This C-style cast makes me nervous... why are you forcing nacl_abi_stat to
struct stat here?

[noelallen1, 2014/04/03 17:58:52]

Because the IRT.H unfortunately uses struct stat where it should use nacl_stat.

+  if (err) {
+    errno = err;
+    return -1;
+  }
+
+  nacl_stat_to_stat(&st, buf);
+  return 0;
+}
+
+
 int _real_mkdir(const char* pathname, mode_t mode) {
   CHECK_REAL(mkdir);
   return REAL(mkdir)(pathname, mode);
 }
 
 int _real_mmap(void** addr, size_t length, int prot, int flags, int fd,
-               off_t offset) {
+               int64_t offset) {
   CHECK_REAL(mmap);
   return REAL(mmap)(addr, length, prot, flags, fd, offset);
 }
 
 int _real_munmap(void* addr, size_t length) {
   CHECK_REAL(munmap);
   return REAL(munmap)(addr, length);
 }
 
 int _real_open(const char* pathname, int oflag, mode_t cmode, int* newfd) {
   CHECK_REAL(open);
   return REAL(open)(pathname, oflag, cmode, newfd);
 }
 
 int _real_open_resource(const char* file, int* fd) {
   CHECK_REAL(open_resource);
   return REAL(open_resource)(file, fd);
 }
 
 int _real_read(int fd, void *buf, size_t count, size_t *nread) {
   CHECK_REAL(read);
   return REAL(read)(fd, buf, count, nread);
 }
 
+int _real_readlink(const char *path, char* buf, size_t count, size_t* nread) {
+  CHECK_REAL(readlink);
+  return REAL(readlink)(path, buf, count, nread);
+}
+
 int _real_rmdir(const char* pathname) {
   CHECK_REAL(rmdir);
   return REAL(rmdir)(pathname);
 }
 
+int _real_truncate(const char* pathname, int64_t len) {
+  CHECK_REAL(truncate);
+  return REAL(truncate)(pathname, len);
+}
+
 int _real_write(int fd, const void *buf, size_t count, size_t *nwrote) {
   CHECK_REAL(write);
   return REAL(write)(fd, buf, count, nwrote);
 }
 
 static bool s_wrapped = false;
 void kernel_wrap_init() {
   if (!s_wrapped) {
     assign_real_pointers();
     EXPAND_SYMBOL_LIST_OPERATION(USE_WRAP)
     s_wrapped = true;
   }
 }
 
 void kernel_wrap_uninit() {
   if (s_wrapped) {
     EXPAND_SYMBOL_LIST_OPERATION(USE_REAL)
     s_wrapped = false;
   }
 }
 
 EXTERN_C_END
 
 #endif  // defined(__native_client__) && defined(__GLIBC__)