zdtm.sh -b <commit>
* save a current head, rollback on <commit> and compile crtools
* execute a test and dump its processes
* checkout the current head and comple crtools
* restore test processes and check results
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

* Replaced the shell interpreter with bash to run
  the script test/zdtm.sh correctly.

* Added new directories into the routine contruct_root()
  searched by the Debian version of the dynamic linker.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Dump the with "new" prlimit syscall that works on arbitrary pid.

Restore is done in restorer _after_ mappings mixup and _before_
caps drop to make it set any max value.

The RLIM_INFINITY is handled explicitly to help future 64<->32
bits migration.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

On my FC17 box calloc calls brk() and the subsequent mprotect(PROT_EXEC)
fails with EACCESS. Using mmap is safer here.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

This one is bound to task's fs info (with cwd and root)
thus put it in the fs.img file.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The number of arguments used to carry data via them is too
big already. Just fill the required core fields inside.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

And do "get real pid, report virtual one" inside.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

* The routine sigreturn_prep_xsave_frame() is renamed to sigreturn_prep_fpu_frame().

* Moved the routines sigreturn_prep_fpu_frame(), show_rt_xsave_frame(), and
  valid_xsave_frame() to the file crtools.c.

* Introduced the structure fpu_state_t to pass the FPU state to the restorer
  in a machine-independent way.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Leave them empty for x86, will be used on ARM.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The current sys_mmap error analysis code doesn't work on 32-bit architectures
with 3G/1G userspace/kernel virtual address space split since the syscall
allocates anonymous memory above the first 2G of the address space ---
such an address is a negative integer so it's interpreted as a error code.
The problem isn't encountered on x86-64 becauase it doesn't use negative
virtual addresses in the userspace.

The 3G/1G split is used because memory allocation is currently broken for other
values of the split on ARM: the value of TASK_UNMAPPED_BASE (arch/arm/include/asm/memory.h)
isn't page-aligned if other split value is used so the value of the field
mm_struct::mmap_base is initialized with a page-unaligned value by
the function arch_pick_mmap_layout() (arch/arm/mm/mmap.c) in some circumstances
that breaks page-alignment checks in the kernel memory management code.

This patch modifies sys_mmap return value analysis code replacing tests
for negativeness of the signed return value with tests that checks that
the return value isn't greater than TASK_SIZE.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The size of an auxv is the machine pointer but a 64-bit integer is reserved
in a MmEntry protobuf message to store an auxv. Moreover the number of auxv's
varies from one architecture to another. So the following is proposed
to alleviate the issue.

* Introduced the type auxv_t representing a machine-pointer sized integer.

* The size of auxv array is extracted from a MmEntry message instead of using
  the value of the macro AT_VECTOR_SIZE.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

restorer: wrapped the assembly code executed on a rt_sigreturn failure into the macro ARCH_FAIL_CORE_RESTORE.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/restorer.h: moved machine-dependent sigframe structs to the file arch/x86/include/asm/restorer.h.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

VM above TASK_SIZE is read-only but some areas are mapped on ARM
into the process address space.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

* The linker script pie/pie.lds.S is generated from the template
  pie/pie.lds.S.in by prepending the output architecture specification.
  The output architecture is defined by the variable LDARCH.

* Blobs are generated by objcopy instead of ld because the ARM linker
  fails to produce a binary when supplied a script.
  (See http://lists.gnu.org/archive/html/bug-binutils/2008-10/msg00091.html).
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

* The following files goes into the directory arch/x86/include/asm unmodified:
  - include/atomic.h,
  - include/linkage.h,
  - include/memcpy_64.h,
  - include/types.h,
  - include/bitops.h,
  - pie/parasite-head-x86-64.S,
  - include/processor-flags.h,
  - include/syscall-x86-64.def.

* Changed include directives in the source files that include the headers
  listed above.

* Modified build scripts to reflect the source moves.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Kernel started with 3.8-rc1 are not report non-existent caps in
/proc/pid/status, so crtools doesn't dump/restore such caps.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We should explicitly unlink old /dev/null instance, otherwise
if such device already exist we might hit a problem as

 | (00.002984) 7412 fdinfo 0: pos: 0x               0 flags:           100002/0
 | (00.003015) Dumping path for 0 fd via self 42 [/dev/null]
 | (00.003025) Error (files-reg.c:422): Unaccessible path opened 2049:109720, need 5:10
 | (00.003033) Error (cr-dump.c:1565): Dump files (pid: 7412) failed with -1
Reported-by: Alexander Kartashov <alekskartashov@parallels.com>
Tested-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

It was required as a temp stub for MySQL restore. Now it
just spoils the code.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

tproxyd is another project.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

gcc is executed with the option --coverage.
lcov creates HTML pages containing the source code annotated with
coverage information.

make GCOV=1
make test
make gcov
Look at gcov/html/index.html

v2: declare the weak __gcov_flush
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

syscalls-x86-64.sh: 3: syscalls-x86-64.sh: Syntax error: "(" unexpected
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

I've just got an interesting built problem which I never saw
before (and which I can't reporoduce at moment):

 | `.text.unlikely' referenced in section `.text' of parasite.o: defined in discarded section `.text.unlikely' of parasite.o

Including sub-text sections is a good thing anyway.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

 - fix names in comments
 - add empty lines where needed
 - fix rbtree.h
 - fix syscall-types.h
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>