commit 5f00db054a6f59502e9deeeb59ace2261207ee31

Author: Alexandra Hajkova <ahajkova@redhat.com>

Date:   Thu May 2 08:24:02 2019 -0400

    Add support for the copy_file_range syscall

    Support amd64, x86, arm64, ppc64, ppc32 and s390x architectures.

    Also add sys-copy_file_range test case.

diff --git a/configure.ac b/configure.ac

index d043ce3..3528925 100755

--- a/configure.ac

+++ b/configure.ac

@@ -4172,6 +4172,7 @@ AC_CHECK_FUNCS([     \

         utimensat    \

         process_vm_readv  \

         process_vm_writev \

+        copy_file_range \

         ])

 # AC_CHECK_LIB adds any library found to the variable LIBS, and links these

@@ -4187,6 +4188,8 @@ AM_CONDITIONAL([HAVE_PTHREAD_SPINLOCK],

                [test x$ac_cv_func_pthread_spin_lock = xyes])

 AM_CONDITIONAL([HAVE_PTHREAD_SETNAME_NP],

                [test x$ac_cv_func_pthread_setname_np = xyes])

+AM_CONDITIONAL([HAVE_COPY_FILE_RANGE],

+               [test x$ac_cv_func_copy_file_range = xyes])

 if test x$VGCONF_PLATFORM_PRI_CAPS = xMIPS32_LINUX \

      -o x$VGCONF_PLATFORM_PRI_CAPS = xMIPS64_LINUX ; then

diff --git a/coregrind/m_syswrap/priv_syswrap-linux.h b/coregrind/m_syswrap/priv_syswrap-linux.h

index f76191a..1edf9eb 100644

--- a/coregrind/m_syswrap/priv_syswrap-linux.h

+++ b/coregrind/m_syswrap/priv_syswrap-linux.h

@@ -379,6 +379,7 @@ DECL_TEMPLATE(linux, sys_getsockname);

 DECL_TEMPLATE(linux, sys_getpeername);

 DECL_TEMPLATE(linux, sys_socketpair);

 DECL_TEMPLATE(linux, sys_kcmp);

+DECL_TEMPLATE(linux, sys_copy_file_range);

 // Some arch specific functions called from syswrap-linux.c

 extern Int do_syscall_clone_x86_linux ( Word (*fn)(void *), 

diff --git a/coregrind/m_syswrap/syswrap-amd64-linux.c b/coregrind/m_syswrap/syswrap-amd64-linux.c

index 30e7d0e..0c1d8d1 100644

--- a/coregrind/m_syswrap/syswrap-amd64-linux.c

+++ b/coregrind/m_syswrap/syswrap-amd64-linux.c

@@ -863,6 +863,8 @@ static SyscallTableEntry syscall_table[] = {

    LINXY(__NR_statx,             sys_statx),             // 332

    LINX_(__NR_membarrier,        sys_membarrier),        // 324

+

+   LINX_(__NR_copy_file_range,   sys_copy_file_range),   // 326

 };

 SyscallTableEntry* ML_(get_linux_syscall_entry) ( UInt sysno )

diff --git a/coregrind/m_syswrap/syswrap-arm64-linux.c b/coregrind/m_syswrap/syswrap-arm64-linux.c

index 290320a..f66be2d 100644

--- a/coregrind/m_syswrap/syswrap-arm64-linux.c

+++ b/coregrind/m_syswrap/syswrap-arm64-linux.c

@@ -819,7 +819,7 @@ static SyscallTableEntry syscall_main_table[] = {

    //   (__NR_userfaultfd,       sys_ni_syscall),        // 282

    LINX_(__NR_membarrier,        sys_membarrier),        // 283

    //   (__NR_mlock2,            sys_ni_syscall),        // 284

-   //   (__NR_copy_file_range,   sys_ni_syscall),        // 285

+   LINX_(__NR_copy_file_range,   sys_copy_file_range),   // 285

    //   (__NR_preadv2,           sys_ni_syscall),        // 286

    //   (__NR_pwritev2,          sys_ni_syscall),        // 287

    //   (__NR_pkey_mprotect,     sys_ni_syscall),        // 288

diff --git a/coregrind/m_syswrap/syswrap-linux.c b/coregrind/m_syswrap/syswrap-linux.c

index 73ef98d..cd0ee74 100644

--- a/coregrind/m_syswrap/syswrap-linux.c

+++ b/coregrind/m_syswrap/syswrap-linux.c

@@ -12093,6 +12093,36 @@ POST(sys_bpf)

    }

 }

+PRE(sys_copy_file_range)

+{

+  PRINT("sys_copy_file_range (%lu, %lu, %lu, %lu, %lu, %lu)", ARG1, ARG2, ARG3,

+        ARG4, ARG5, ARG6);

+

+  PRE_REG_READ6(vki_size_t, "copy_file_range",

+                int, "fd_in",

+                vki_loff_t *, "off_in",

+                int, "fd_out",

+                vki_loff_t *, "off_out",

+                vki_size_t, "len",

+                unsigned int, "flags");

+

+  /* File descriptors are "specially" tracked by valgrind.

+     valgrind itself uses some, so make sure someone didn't

+     put in one of our own...  */

+  if (!ML_(fd_allowed)(ARG1, "copy_file_range(fd_in)", tid, False) ||

+      !ML_(fd_allowed)(ARG3, "copy_file_range(fd_in)", tid, False)) {

+     SET_STATUS_Failure( VKI_EBADF );

+  } else {

+     /* Now see if the offsets are defined. PRE_MEM_READ will

+        double check it can dereference them. */

+     if (ARG2 != 0)

+        PRE_MEM_READ( "copy_file_range(off_in)", ARG2, sizeof(vki_loff_t));

+     if (ARG4 != 0)

+        PRE_MEM_READ( "copy_file_range(off_out)", ARG4, sizeof(vki_loff_t));

+  }

+}

+

+

 #undef PRE

 #undef POST

diff --git a/coregrind/m_syswrap/syswrap-ppc32-linux.c b/coregrind/m_syswrap/syswrap-ppc32-linux.c

index f812f1f..71f208d 100644

--- a/coregrind/m_syswrap/syswrap-ppc32-linux.c

+++ b/coregrind/m_syswrap/syswrap-ppc32-linux.c

@@ -1021,6 +1021,8 @@ static SyscallTableEntry syscall_table[] = {

    LINXY(__NR_getrandom,         sys_getrandom),        // 359

    LINXY(__NR_memfd_create,      sys_memfd_create),     // 360

+   LINX_(__NR_copy_file_range,   sys_copy_file_range),  // 379

+

    LINXY(__NR_statx,             sys_statx),            // 383

 };

diff --git a/coregrind/m_syswrap/syswrap-ppc64-linux.c b/coregrind/m_syswrap/syswrap-ppc64-linux.c

index eada099..1a42c1f 100644

--- a/coregrind/m_syswrap/syswrap-ppc64-linux.c

+++ b/coregrind/m_syswrap/syswrap-ppc64-linux.c

@@ -1007,6 +1007,8 @@ static SyscallTableEntry syscall_table[] = {

    LINX_(__NR_membarrier,        sys_membarrier),       // 365

+   LINX_(__NR_copy_file_range,   sys_copy_file_range),  // 379

+

    LINXY(__NR_statx,             sys_statx),            // 383

 };

diff --git a/coregrind/m_syswrap/syswrap-s390x-linux.c b/coregrind/m_syswrap/syswrap-s390x-linux.c

index ad78384..41ada8d 100644

--- a/coregrind/m_syswrap/syswrap-s390x-linux.c

+++ b/coregrind/m_syswrap/syswrap-s390x-linux.c

@@ -854,6 +854,8 @@ static SyscallTableEntry syscall_table[] = {

    LINXY(__NR_recvmsg, sys_recvmsg),                                  // 372

    LINX_(__NR_shutdown, sys_shutdown),                                // 373

+   LINX_(__NR_copy_file_range, sys_copy_file_range),                  // 375

+

    LINXY(__NR_statx, sys_statx),                                      // 379

 };

diff --git a/coregrind/m_syswrap/syswrap-x86-linux.c b/coregrind/m_syswrap/syswrap-x86-linux.c

index f05619e..f8d97ea 100644

--- a/coregrind/m_syswrap/syswrap-x86-linux.c

+++ b/coregrind/m_syswrap/syswrap-x86-linux.c

@@ -1608,6 +1608,8 @@ static SyscallTableEntry syscall_table[] = {

    LINX_(__NR_membarrier,        sys_membarrier),       // 375

+   LINX_(__NR_copy_file_range,   sys_copy_file_range),   // 377

+

    LINXY(__NR_statx,             sys_statx),            // 383

    /* Explicitly not supported on i386 yet. */

diff --git a/memcheck/tests/linux/Makefile.am b/memcheck/tests/linux/Makefile.am

index d7515d9..00e99a5 100644

--- a/memcheck/tests/linux/Makefile.am

+++ b/memcheck/tests/linux/Makefile.am

@@ -20,6 +20,7 @@ EXTRA_DIST = \

 	stack_switch.stderr.exp stack_switch.vgtest \

 	syscalls-2007.vgtest syscalls-2007.stderr.exp \

 	syslog-syscall.vgtest syslog-syscall.stderr.exp \

+	sys-copy_file_range.vgtest sys-copy_file_range.stderr.exp \

 	sys-openat.vgtest sys-openat.stderr.exp sys-openat.stdout.exp \

 	sys-statx.vgtest sys-statx.stderr.exp \

 	timerfd-syscall.vgtest timerfd-syscall.stderr.exp \

@@ -49,6 +50,10 @@ if HAVE_AT_FDCWD

 check_PROGRAMS += sys-openat

 endif

+if HAVE_COPY_FILE_RANGE

+        check_PROGRAMS += sys-copy_file_range

+endif

+

 AM_CFLAGS   += $(AM_FLAG_M3264_PRI)

 AM_CXXFLAGS += $(AM_FLAG_M3264_PRI)

diff --git a/memcheck/tests/linux/sys-copy_file_range.c b/memcheck/tests/linux/sys-copy_file_range.c

new file mode 100644

index 0000000..83981c6

--- /dev/null

+++ b/memcheck/tests/linux/sys-copy_file_range.c

@@ -0,0 +1,67 @@

+#define _GNU_SOURCE

+#include <fcntl.h>

+#include <stdio.h>

+#include <stdlib.h>

+#include <sys/stat.h>

+#include <sys/syscall.h>

+#include <unistd.h>

+

+int main(int argc, char **argv)

+{

+    int fd_in, fd_out;

+    struct stat stat;

+    loff_t len, ret;

+

+    fd_in = open("copy_file_range_source", O_CREAT | O_RDWR);

+    if (fd_in == -1) {

+        perror("open copy_file_range_source");

+        exit(EXIT_FAILURE);

+    }

+

+    if (write(fd_in, "foo bar\n", 8) != 8) {

+        perror("writing to the copy_file_range_source");

+        exit(EXIT_FAILURE);

+    }

+    lseek(fd_in, 0, SEEK_SET);

+

+    if (fstat(fd_in, &stat) == -1) {

+        perror("fstat");

+        exit(EXIT_FAILURE);

+    }

+

+    len = stat.st_size;

+

+    fd_out = open("copy_file_range_dest", O_CREAT | O_WRONLY | O_TRUNC, 0644);

+    if (fd_out == -1) {

+        perror("open copy_file_range_dest");

+        exit(EXIT_FAILURE);

+    }

+

+    /* Check copy_file_range called with the correct arguments works. */

+    do {

+        ret = copy_file_range(fd_in, NULL, fd_out, NULL, len, 0);

+        if (ret == -1) {

+            perror("copy_file_range");

+            exit(EXIT_FAILURE);

+        }

+

+        len -= ret;

+    } while (len > 0);

+

+    /* Check valgrind will produce expected warnings for the

+       various wrong arguments. */

+    do {

+        void *t;

+        void *z = (void *) -1;

+

+        ret = copy_file_range(fd_in, t, fd_out, NULL, len, 0);

+        ret = copy_file_range(fd_in, NULL, fd_out, z, len, 0);

+        ret = copy_file_range(- 1, NULL, - 1, NULL, len, 0);

+    } while (0);

+

+    close(fd_in);

+    close(fd_out);

+    unlink("copy_file_range_source");

+    unlink("copy_file_range_dest");

+    exit(EXIT_SUCCESS);

+}

diff --git a/memcheck/tests/linux/sys-copy_file_range.stderr.exp b/memcheck/tests/linux/sys-copy_file_range.stderr.exp

new file mode 100644

index 0000000..1aa4dc2

--- /dev/null

+++ b/memcheck/tests/linux/sys-copy_file_range.stderr.exp

@@ -0,0 +1,21 @@

+

+Syscall param copy_file_range("off_in") contains uninitialised byte(s)

+   ...

+   by 0x........: main (sys-copy_file_range.c:57)

+

+Syscall param copy_file_range(off_out) points to unaddressable byte(s)

+   ...

+   by 0x........: main (sys-copy_file_range.c:58)

+ Address 0x........ is not stack'd, malloc'd or (recently) free'd

+

+Warning: invalid file descriptor -1 in syscall copy_file_range(fd_in)()

+

+HEAP SUMMARY:

+    in use at exit: 0 bytes in 0 blocks

+  total heap usage: 0 allocs, 0 frees, 0 bytes allocated

+

+For a detailed leak analysis, rerun with: --leak-check=full

+

+Use --track-origins=yes to see where uninitialised values come from

+For lists of detected and suppressed errors, rerun with: -s

+ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

diff --git a/memcheck/tests/linux/sys-copy_file_range.vgtest b/memcheck/tests/linux/sys-copy_file_range.vgtest

new file mode 100644

index 0000000..b7741e8

--- /dev/null

+++ b/memcheck/tests/linux/sys-copy_file_range.vgtest

@@ -0,0 +1,2 @@

+prereq: test -e sys-copy_file_range

+prog: sys-copy_file_range

commit bd27ad3ff31555484b7fdb310c4b033620882e44

Author: Mark Wielaard <mark@klomp.org>

Date:   Sun May 5 16:01:41 2019 +0200

    Hook linux copy_file_range syscall on arm.

diff --git a/coregrind/m_syswrap/syswrap-arm-linux.c b/coregrind/m_syswrap/syswrap-arm-linux.c

index 9f1bdab..9ba0665 100644

--- a/coregrind/m_syswrap/syswrap-arm-linux.c

+++ b/coregrind/m_syswrap/syswrap-arm-linux.c

@@ -1016,6 +1016,8 @@ static SyscallTableEntry syscall_main_table[] = {

    LINXY(__NR_getrandom,         sys_getrandom),        // 384

    LINXY(__NR_memfd_create,      sys_memfd_create),     // 385

+   LINX_(__NR_copy_file_range,   sys_copy_file_range),  // 391

+

    LINXY(__NR_statx,             sys_statx),            // 397

 };