Commit Graph

134 Commits

Author SHA1 Message Date
184e94ba05 Fix a few spacing style issues
Reported by kernel's checkpatch.pl script.
2017-06-17 22:54:08 +00:00
Eugene Syromyatnikov
9d095c7860 Add copyright headers 2017-05-22 17:33:51 +00:00
f91679316b Introduce ANY_WORDSIZE_LESS_THAN_KERNEL_LONG macro
* defs.h (ANY_WORDSIZE_LESS_THAN_KERNEL_LONG): New macro.
(truncate_klong_to_current_wordsize,
truncate_kulong_to_current_wordsize): Use it.
* mem.c (SYS_FUNC(old_mmap)): Likewise.
* util.c (umoven, umovestr, dumpiov_upto): Likewise.
* syscall.c (trace_syscall_exiting): Likewise.
2016-12-27 01:08:58 +00:00
a1e94e9c7a Remove HAVE_STRUCT_TCB_EXT_ARG, ext_arg, and u_lrval
After transition from long to kernel_ulong_t these fields
are no longer needed.

* defs.h (HAVE_STRUCT_TCB_EXT_ARG): Remove.
(struct tcb) [HAVE_STRUCT_TCB_EXT_ARG]: Remove.
[HAVE_STRUCT_TCB_EXT_ARG]: Remove.
(RVAL_MASK): Update.
* io.c (print_lld_from_low_high_val): Check
[SIZEOF_KERNEL_LONG_T > SIZEOF_LONG]
instead of [HAVE_STRUCT_TCB_EXT_ARG].
Use u_arg instead of ext_arg.
* linux/mips/get_error.c (get_error) [LINUX_MIPSN32]: Remove.
* linux/mips/get_syscall_args.c (get_syscall_args) [LINUX_MIPSN32]:
Remove.
[LINUX_MIPSN64]: Extend to [LINUX_MIPSN32].
* linux/x86_64/get_error.c (get_error) [X32]: Remove.
* linux/x86_64/get_syscall_args.c (get_syscall_args) [X32]: Remove.
* lseek.c: Check [SIZEOF_KERNEL_LONG_T > SIZEOF_LONG]
instead of [HAVE_STRUCT_TCB_EXT_ARG].
[SIZEOF_KERNEL_LONG_T > SIZEOF_LONG] (SYS_FUNC(lseek)): Use u_arg
instead of ext_arg.  Use RVAL_UDECIMAL instead of RVAL_LUDECIMAL.
* mem.c (SYS_FUNC(mmap)): Pass offset syscall argument directly
to print_mmap.
* syscall.c (trace_syscall_exiting) [HAVE_STRUCT_TCB_EXT_ARG]: Remove.
* times.c (SYS_FUNC(times)): Use RVAL_UDECIMAL instead
of RVAL_LUDECIMAL.
* util.c (getllval): Check [SIZEOF_KERNEL_LONG_T > SIZEOF_LONG]
instead of [HAVE_STRUCT_TCB_EXT_ARG].  Use u_arg instead of ext_arg.
2016-12-26 10:43:35 +00:00
50b50e78f6 Remove getarg_klu
After transition from long to kernel_ulong_t we no longer need
tcp->ext_arg, and therefore a function to access it is also no longer
needed.

* defs.h (getarg_klu): Remove prototype.
* util.c (getarg_klu): Remove.
(printargs): Access tcp->u_arg directly
* bjm.c (SYS_FUNC(init_module)): Likewise.
* clone.c (SYS_FUNC(unshare)): Likewise.
* fadvise.c (SYS_FUNC(fadvise64)): Likewise.
* kcmp.c (SYS_FUNC(kcmp)): Likewise.
* kexec.c (SYS_FUNC(kexec_file_load)): Likewise.
* keyctl.c (SYS_FUNC(keyctl)): Likewise.
* lookup_dcookie.c (SYS_FUNC(lookup_dcookie)): Likewise.
* mem.c (do_mprotect): Likewise.
* mq.c (SYS_FUNC(mq_timedsend), SYS_FUNC(mq_timedreceive)): Likewise.
* pkeys.c (SYS_FUNC(pkey_alloc)): Likewise.
* prctl.c (print_prctl_args, SYS_FUNC(prctl), SYS_FUNC(arch_prctl)):
Likewise.
2016-12-26 10:43:35 +00:00
8aab60e8d3 Remove printaddr_klu
After transition from long to kernel_ulong_t we no longer need
two versions of printaddr function.

* defs.h (printaddr): Remove.
(printaddr_klu): Rename to printaddr.
* util.c (printaddr_klu): Likewise.
* bjm.c (SYS_FUNC(init_module)): Replace printaddr_klu with printaddr.
* mem.c (do_mprotect): Likewise.
2016-12-26 10:43:35 +00:00
89636759d7 Automatically replace PRI_kr[dux] with PRI_kl[dux]
Remove temporary macros created for transition from long
to kernel_ulong_t.

Automatically replace PRI_kr[dux] with PRI_kl[dux] using
$ git grep -l 'PRI_kr[dux]' | xargs sed -ri 's/PRI_kr([dux])/PRI_kl\1/g'

* defs.h (PRI_krd, PRI_kru, PRI_krx): Remove.  All users updated.
2016-12-26 10:43:34 +00:00
7fa3d78319 Automatically replace kernel_(scno|ureg)_t with kernel_ulong_t
Remove temporary types created for transition from long
to kernel_ulong_t.

Automatically replace kernel_scno_t and kernel_ureg_t with
kernel_ulong_t using
$ git grep -El 'kernel_(scno|ureg)_t' |
  xargs sed -ri 's/kernel_(scno|ureg)_t/kernel_ulong_t/g'

* kernel_types.h (kernel_scno_t, kernel_ureg_t): Remove.
All users updated.
2016-12-26 10:43:34 +00:00
1d5bb61c49 Print kernel_ureg_t and kernel_scno_t using dedicated format strings
Prepare for the change of kernel_ureg_t and kernel_scno_t from
unsigned long to kernel_ulong_t.

* defs.h (PRI_krd, PRI_kru, PRI_krx): New temporary macros.
All users updated.
2016-12-26 10:43:04 +00:00
697ca3e41f mem: change mmap arguments type from unsigned long to kernel_ureg_t
* mem.c (print_mmap): Change the type of len, prot, and flags
from unsigned long to kernel_ureg_t.  Use printflags64 instead
of printflags_long.  Use printxval64 instead of printxval_long.
(SYS_FUNC(old_mmap)): Check for current_klongsize instead
of [AARCH64 || X86_64] to take X32 into account.
(SYS_FUNC(mremap)): Use printflags64 instead of printflags_long.
(SYS_FUNC(remap_file_pages)): Change the type of size, prot, pgoff, and
flags from unsigned long to kernel_ureg_t.  Use printflags64 instead
of printflags_long.  Use printxval64 instead of printxval_long.
[POWERPC] (SYS_FUNC(subpage_prot)): Change the type of len and nmemb
from unsigned long to kernel_ureg_t.
2016-12-25 11:32:45 +00:00
657ab73f3a mem: change tracee address type from unsigned long to kernel_ureg_t
* mem.c (print_mmap, SYS_FUNC(remap_file_pages),
SYS_FUNC(subpage_prot)): Change the type of variables containing tracee
addresses from unsigned long to kernel_ureg_t.
2016-12-23 19:26:58 +00:00
6c9c122799 mem: remove redundant casts
* mem.c (SYS_FUNC(old_mmap)): Remove redundant cast
from kernel_ureg_t to unsigned long.
[S390] (SYS_FUNC(old_mmap_pgoff)): Remove redundant cast
from unsigned int to unsigned long.
2016-12-23 12:48:46 +00:00
874caabc0f x32: fix decoding of mprotect and pkey_mprotect syscall arguments
As there are no compat versions of mprotect or pkey_mprotect syscalls
in x32 personality, "addr", "len", and "prot" syscall arguments have
kernel_ulong_t type and should be printed accordingly.

* mem.c (do_mprotect): Retrieve 1st, 2nd and 3rd arguments using
getarg_klu, print them using printaddr_klu, PRI_klu format,
and printflags64, correspondingly.
2016-12-20 05:09:13 +00:00
fc346f1d91 struct tcb: make types of syscall arguments unsigned
This is the first step in the direction of revisiting current practice
of indiscriminate use of signed types for syscall arguments and memory
addresses.

* kernel_types.h (kernel_ureg_t): New type, typedef to unsigned long.
* defs.h (struct tcb): Change type of u_arg from long to kernel_ureg_t.
[HAVE_STRUCT_TCB_EXT_ARG]: Change type of ext_arg from long long
to unsigned long long.
* desc.c (decode_select): Change type of syscall arguments from long
to kernel_ureg_t.
(SYS_FUNC(oldselect)): Change type of select_args from long
to kernel_ureg_t.
* io.c (print_lld_from_low_high_val): Remove no longer needed cast
of syscall arguments to unsigned long.
* lseek.c (SYS_FUNC(lseek)): Cast syscall argument from unsigned long
to long.
* mem.c (print_mmap): Change type of syscall arguments from long
to kernel_ureg_t.
(SYS_FUNC(old_mmap), SYS_FUNC(old_mmap_pgoff)): Change type of u_arg
from long to kernel_ureg_t.
(SYS_FUNC(mmap), SYS_FUNC(mmap_pgoff), SYS_FUNC(mmap_pgoff)): Remove
no longer needed cast of syscall arguments to unsigned long.
* pathtrace.c (pathtrace_match): Change type of args and select_args
from long to kernel_ureg_t.
* util.c (getarg_ull): Remove no longer needed casts of syscall
arguments to unsigned types.
2016-12-19 12:38:29 +00:00
29107a40e9 s390: fix decoding of mmap2 syscall when arguments are not available
* mem.c [S390] (SYS_FUNC(old_mmap_pgoff)): Use umove_or_printaddr
instead of umoven to fetch mmap arguments, fix return value when this
fetch fails.
2016-12-19 12:34:51 +00:00
Eugene Syromyatnikov
d4d5aaa560 mem: print mincore output as an array
* mem.c (SYS_FUNC(minore)): Print commas between elements.
* tests/mincore.c (print_mincore): Update expected output in accordance
with syscall decoder formatting change.
2016-11-29 00:25:55 +00:00
Eugene Syromyatnikov
98a93b46fd Add support for pkey_mprotect, pkey_alloc, pkey_free syscalls
* linux/32/syscallent.h: Add syscall entries for pkey_* calls.
* linux/64/syscallent.h: Likewise.
* linux/arm/syscallent.h: Likewise.
* linux/i386/syscallent.h: Likewise.
* linux/mips/syscallent-n32.h: Likewise.
* linux/mips/syscallent-n64.h: Likewise.
* linux/mips/syscallent-o32.h: Likewise.
* linux/x32/syscallent.h: Likewise.
* linux/x86_64/syscallent.h: Likewise.
* mem.c (do_mprotect): New function, common handler for mprotect and
pkey_mprotect.
(SYS_FUNC(mprotect)): Convert to wrapper around do_mprotect.
(SYS_FUNC(pkey_mprotect)): New function.
* xlat/pkey_access.in: New file.
* pkeys.c: New file containing implementation of pkey_alloc and
pkey_free.
* Makefile.am: Add it.
* NEWS: Mention this enhancement.
* tests/.gitignore: Add pkey_alloc, pkey_free, and pkey_mprotect.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add pkey_alloc.test, pkey_free.test, and
pkey_mprotect.test.
* tests/pkey_alloc.c: New file.
* tests/pkey_free.c: Likewise.
* tests/pkey_mprotect.c: Likewise.
* tests/pkey_alloc.test: New test.
* tests/pkey_free.test: Likewise.
* tests/pkey_mprotect.test: Likewise.
2016-11-13 21:41:58 +00:00
b0c51131a3 Introduce HAVE_STRUCT_TCB_EXT_ARG macro
Check for "if HAVE_STRUCT_TCB_EXT_ARG" instead of
"if defined LINUX_MIPSN32 || defined X32".

* defs.h (HAVE_STRUCT_TCB_EXT_ARG): Define for LINUX_MIPSN32 || X32.
(struct tcb): Check it instead of LINUX_MIPSN32 || X32.
(RVAL_LUDECIMAL): Likewise.
* io.c (print_lld_from_low_high_val): Likewise.
* lseek.c (SYS_FUNC(lseek)): Likewise.
* mem.c (SYS_FUNC(mmap)): Likewise.
* syscall.c (trace_syscall_exiting): Likewise.
* util.c (getllval): Likewise.
2016-06-17 16:12:13 +00:00
1168114879 Fix printing of invalid arguments of memory mapping related syscalls
* mem.c (print_mmap): Print 3rd and 4th arguments of syscall
using printflags_long.
(SYS_FUNC(mprotect)): Print 3rd argument of syscall using
printflags_long.
(SYS_FUNC(mremap)): Print 4th argument of syscall using printflags_long.
(SYS_FUNC(remap_file_pages)): Print 3rd and 4th arguments of syscall
using printflags_long.
* tests/remap_file_pages.c (main): Update.
2016-05-16 23:47:34 +00:00
0f04b9d6d1 mem.c: use print_array function
* mem.c [POWERPC] (print_protmap_entry): New function.
[POWERPC] (SYS_FUNC(subpage_prot)): Use it via print_array.
2016-05-07 23:32:30 +00:00
a4da0c8b79 Move parsers of NUMA related syscalls to numa.c
* mem.c (get_nodes, SYS_FUNC(mbind), SYS_FUNC(set_mempolicy),
SYS_FUNC(get_mempolicy), SYS_FUNC(migrate_pages), SYS_FUNC(move_pages)):
Move ...
* numa.c: ... here.
* Makefile.am (strace_SOURCES): Add numa.c
2016-04-27 05:09:16 +00:00
9d2b6b9b52 Move definitions of MPOL_* constants to xlat files
* mem.c (MPOL_DEFAULT, MPOL_PREFERRED, MPOL_BIND, MPOL_INTERLEAVE):
Move to xlat/policies.in.
(MPOL_F_NODE, MPOL_F_ADDR): Move to xlat/mempolicyflags.in.
(MPOL_MF_STRICT, MPOL_MF_MOVE, MPOL_MF_MOVE_ALL): Move
to xlat/mbindflags.in.
2016-04-26 16:36:30 +00:00
3db07f11c8 Fix old_mmap output when mmap arguments are unfetchable
* mem.c (SYS_FUNC(old_mmap)): Use umove_or_printaddr instead of umoven
to fetch mmap arguments, return RVAL_DECODED when umove_or_printaddr
fails.
* tests/old_mmap.c (main): Check it.
2016-04-23 00:07:14 +00:00
cf52778aba aarch64: fix old_mmap output for arm personality
* mem.c (SYS_FUNC(old_mmap)) [AARCH64]: Fetch mmap arguments
as 32-bit integers.
2016-04-22 23:47:46 +00:00
bc724ce0bf Define old_mmap parser only on architectures that use it
* mem.c (SYS_FUNC(old_mmap)): Define only on AARCH64, ARM, I386, X86_64,
X32, M68K, S390, and S390X.
2016-04-22 23:36:26 +00:00
3ae8690d8e Consistently handle unsigned arguments of mmap* and remap_file_pages
Explicitly declare first 4 arguments of mmap* and all remap_file_pages
arguments as unsigned to avoid potential sign extension issues.

* mem.c (print_mmap, SYS_FUNC(remap_file_pages)): Assign syscall
arguments to local variables of appropriate types.
2016-04-01 15:31:23 +00:00
dfea1da0e6 Fixed decoding of mincore syscall's last argument
* mem.c (SYS_FUNC(mincore)): Print only those bytes of the vector
that were written by the kernel.
* NEWS: Mention this fix.
* tests/mincore.c: New file.
* tests/mincore.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add mincore.
(TESTS): Add mincore.test.
* tests/.gitignore: Add mincore.
2016-01-29 02:39:40 +00:00
b61b2d820f Cleanup parser of getpagesize syscall
* mem.c (SYS_FUNC(getpagesize)): Decode on entering syscall.
2016-01-08 19:20:05 +00:00
0d0a50aa25 Implement mlock2 syscall decoding
* mem.c: Include "xlat/mlock_flags.h".
(SYS_FUNC(mlock2)): New function.
* xlat/mlock_flags.in: New file.
* xlat/mlockall_flags.in: Add MCL_ONFAULT, add default values.
* linux/dummy.h (mlock2): Remove.
* tests/mlock2.c: New file.
* tests/mlock2.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add mlock2.
(TESTS): Add mlock2.test.
* tests/.gitignore Add mlock2.
2015-11-17 00:40:22 +00:00
ece9ce6fea m68k: fix getpagesize decoding
* linux/m68k/syscallent.h (getpagesize): Set sys_func.
* mem.c [M68K] (sys_getpagesize): Define.
2015-07-21 19:09:35 +00:00
85813ceb2d mem.c: make use of RVAL_DECODED
* mem.c (print_mmap): Change to return void.
Update for RVAL_DECODED.
(sys_old_mmap, sys_old_mmap_pgoff, sys_mmap, sys_mmap_pgoff,
sys_mmap_4koff): Update callers.  Update for RVAL_DECODED.
(sys_brk, sys_munmap, sys_mprotect, sys_mremap, sys_madvise,
sys_mlockall, sys_msync, sys_remap_file_pages, sys_mbind,
sys_set_mempolicy, sys_migrate_pages, [POWERPC] subpage_prot):
Update for RVAL_DECODED.
2015-07-20 01:42:01 +00:00
2c389f6751 mem.c: use printaddr and umove_or_printaddr
* mem.c (sys_brk, print_mmap, sys_munmap, sys_mprotect, sys_mremap,
sys_madvise, sys_msync, sys_mincore, sys_remap_file_pages, get_nodes,
sys_mbind, [POWERPC] sys_subpage_prot): Use printaddr.
(sys_get_mempolicy): Use printaddr and umove_or_printaddr.
2015-07-20 01:42:01 +00:00
a0bd3749fc Declare syscall parsers using SYS_FUNC macro
Introduce SYS_FUNC macro to declare and define all syscall parsers.

* Makefile.am (BUILT_SOURCES, CLEANFILES): Add sys_func.h.
(sys_func.h): New rule.
* defs.h (SYS_FUNC_NAME, SYS_FUNC): New macros.
* linux/syscall.h: Include "sys_func.h".
[NEED_UID16_PARSERS]: Use SYS_FUNC to declare uid16 syscall parsers.
Remove other declarations.
* linux/alpha/syscallent.h (160, 161): Add sys_ prefix to osf_statfs
and osf_fstatfs syscall parsers.
* *.c: Use SYS_FUNC to define syscall parsers.
2015-04-07 11:22:49 +00:00
ea1fea6982 umovestr: read chunks of memory up to pagesize at a time
* defs.h (get_pagesize): New prototype.
* mem.c (get_pagesize) Make global.
* util.c (PAGMASK): Remove.
(vm_read_mem): New process_vm_readv proxy function.
(umoven, umovestr): Use it.
(umovestr): Read chunks up to pagesize at a time.
2015-03-31 20:56:38 +00:00
Denys Vlasenko
7e69ed98cd Change last parameter of umoven() from char* to void*
Saves tons of casts.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
2015-03-21 19:50:53 +01:00
3b64d99098 powerpc: fix potential compilation warning
* mem.c [POWERPC] (sys_subpage_prot): Fix "comparison between signed
and unsigned" warning reported by some gcc versions.
2015-01-14 07:17:11 +00:00
6b82ba5b7f Remove unused sys_mctl
Starting with commit v4.6-240-g5afdf12, nobody compiles this
non-Linux code.

* mem.c [MC_SYNC]: Remove.
* xlat/mctl_funcs.in: Remove.
* xlat/mctl_lockas.in: Remove.
2014-12-02 20:39:13 +00:00
3ed5d02183 Fix compilation warnings reported by gcc -Wsign-compare
* configure.ac (gl_WARN_ADD): Add -Wsign-compare.
* defs.h (struct tcb): Change 'currpers' type to unsigned.
(struct xlat): Change 'val' type to unsigned
(signame): Add 'const' qualifier to its argument.
(xlookup, printxval): Add 'const' qualifier to the 2nd argument and
change its type to unsigned.
(printpathn): Change the 3rd argument type to unsigned.
(ioctl_lookup): Change 1st argument type to unsigned.
* count.c (call_summary_pers, call_summary): Change 'i' type to unsigned.
* file.c (print_xattr_list): Fix comparisons between signed and unsigned
long values.
* ioctl.c (compare): Fix cast.
(ioctl_lookup): Change 1st argument type to to unsigned.
(ioctl_next_match): Change 'code' type to unsigned.
* mem.c (sys_move_pages): Change 'i' type to unsigned.
* mtd.c (mtd_ioctl): Change 'i' and 'j' types to unsigned.
Print 'i' using %u format string.
* process.c (sys_prctl): Change 'i' type to unsigned.
(printargv): Change 'n' type to unsigned.
(sys_ptrace): Change 'addr' type to unsigned.
* scsi.c (print_sg_io_buffer): Add 'const' qualifier to 'len' argument
and change its type to unsigned.  Change 'i' and 'allocated' types
to unsigned.
* signal.c (signame): Add 'const' qualifier to its argument.
Fix comparisons between signed and unsigned values.
(sprintsigmask_n, printsiginfo): Fix comparisons between signed and
unsigned values.
* sock.c (sock_ioctl): Change 'i' and 'nifra' types to unsigned.
* strace.c (expand_tcbtab, alloctcb): Change 'i' type to unsigned.
(detach): Change 'sig' type to unsigned.
(startup_attach): Change 'tcbi' type to unsigned.
(startup_child): Change 'm', 'n', and 'len' types to unsigned.
(init): Use new variable to iterate 'tcbtab'.
(pid2tcb): Change 'i' type to unsigned.
(cleanup): Change 'i' and 'sig' types to unsigned.
* syscall.c (update_personality): Change 'personality' argument type
to unsigned.
(struct qual_options): Change 'bitflag' type to unsigned.
(reallocate_qual): Add 'const' qualifier to its argument and change its
type to unsigned.
(qualify_one): Change 'n' and 'bitflag' arguments types to unsigned.
Add 'const' qualifier to 'n', 'not', and 'pers' arguments.
Change 'p' type to signed int.
(qual_syscall): Change 'bitflag' argument type to unsigned.
Add 'const' qualifier to 'bitflag' and 'not' arguments.
Change 'p' type to signed int.
(qual_signal): Change 'bitflag' argument type to unsigned.
Add 'const' qualifier to 'bitflag' and 'not' arguments.
Change 'i' type to unsigned.
(qual_desc): Change 'bitflag' argument type to unsigned.
Add 'const' qualifier to 'bitflag' and 'not' arguments.
(qualify): Change 'i' type to unsigned.
(get_scno): Change 'currpers' type to unsigned.
Fix a comparison between signed and unsigned values.
* system.c (sys_sysctl): Change 'cnt' and 'max_cnt' types to unsigned.
Fix comparisons between signed and unsigned values.
* util.c (xlookup, printxval): Add 'const' qualifier to 'val' argument
and change its type to unsigned.
(printuid): Fix a comparison between signed and unsigned values.
(printpathn): Change 'n' argument type to unsigned.
(printstr): Change 'size' type to unsigned.
Fix a comparison between signed and unsigned values.
(setbpt): Change 'i' type to unsigned.
* net.c (printsock): Silence a compilation warning.
* reboot.c (sys_reboot): Likewise.
2014-09-17 19:18:18 +00:00
Masatake YAMATO
ed69fc2dc3 unwind: move stacktrace capturing and mmap cache invalidating to trace_syscall_entering
Instead of handling stacktrace capturing and mmap cache invalidating in
sys_* functions, handle them uniformly in trace_syscall_entering using
new flags introduced by previous two commits.

The patch is simpler than its older version(v3).  The value of
hide_log_until_execve is just ignored.  I found the value is nothing
to do with this patch.  unwind_cache_invalidate is mentioned only
once in trace_syscall_exiting.
Both are suggested by Dmitry Levin.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
2014-05-30 22:59:01 +00:00
Masatake YAMATO
f8e39d7b7a unwind: introduce queue_t for capturing stacktrace
This is the second step for splitting capturing from printing.

New `queue' field is added to tcb.  Captured stacktrace is stored here.
The field is initialized/finalized at unwind_tcb_init/unwind_tcb_fin.

New API function unwind_capture_stacktrace is added.  This function
captures the currest stack using stracktrace_walker and records it in
tcb.  It's printing is delayed to the next call of
unwind_print_stacktrace.

unwind_print_stacktrace is extended.  Now it checks queue field of
the given tcb at the start of function.  If the function finds a
captured stack trace, the latter is printed using stracktrace_walker.

Currently unwind_capture_stacktrace invocations are added directly to
handlers of mmap, munmap, mprotect, and execve.

Here is the difference of output with/without patch:

(without patch)
  execve("./test-fork", ["./test-fork"], [/* 56 vars */]) = 0
   > /usr/lib64/ld-2.18.so(check_one_fd.part.0+0x82) [0x11f0]

(with patch)
  execve("./test-fork", ["./test-fork"], [/* 54 vars */]) = 0
   > /usr/lib64/libc-2.18.so(execve+0x7) [0xbcd27]
   > /home/yamato/var/strace/strace(exec_or_die+0x10c) [0x26ac]
   > /home/yamato/var/strace/strace(startup_child+0x346) [0x134f6]
   > /home/yamato/var/strace/strace(init+0x89f) [0x13dff]
   > /home/yamato/var/strace/strace(main+0xa) [0x26ca]
   > /usr/lib64/libc-2.18.so(__libc_start_main+0xf5) [0x21d65]
   > /home/yamato/var/strace/strace(_start+0x29) [0x2799]

In older version output lines of captured elements were built when
printing.  In this version they are built when capturing the stack.
As result, unneeded dynamic memory allocations are avoided.
Suggested by Luca Clementi.

In older version the combination of snprintf and realloc were used.
In this version they are replaced with asprintf.
Suggested by Dmitry Levin.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
2014-05-30 22:55:08 +00:00
Masatake YAMATO
6141392856 unwind: give all exported functions "unwind_" prefix
* unwind.c (init_unwind_addr_space): Rename to unwind_init.
(init_libunwind_ui): Rename to unwind_tcb_init.
(free_libunwind_ui): Rename to unwind_tcb_fin.
(delete_mmap_cache): Rename to unwind_cache_invalidate.
(print_stacktrace): Rename to unwind_print_stacktrace.
* defs.h: Update prototypes.
* mem.c: All callers updated.
* process.c: Likewise.
* strace.c: Likewise.
* syscall.c: Likewise.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
2014-05-30 22:40:22 +00:00
Luca Clementi
327064b637 Add -k option to print stack trace after each syscall
Print the stack trace of the traced process after each system call when
-k option is specified.  It is implemented using libunwind to unwind the
stack and to obtain the function name pointed by the IP.

Based on the code that was originally taken from strace-plus
of Philip J. Guo.

* configure.ac: Add --with-libunwind option.  Check libunwind support.
* Makefile.am: Add libunwind support.
* defs.h (struct tcb) [USE_LIBUNWIND]: Append libunwind specific fields.
[USE_LIBUNWIND] (stack_trace_enabled, alloc_mmap_cache,
delete_mmap_cache, print_stacktrace): New prototypes.
* mem.c (print_mmap, sys_munmap, sys_mprotect): Add libunwind support.
* process.c (sys_execve): Likewise.
* strace.c (usage, alloctcb, droptcb, init): Likewise.
* syscall.c (trace_syscall_exiting): Likewise.
* unwind.c: New file.
* strace.1: Document -k option.
2014-05-30 22:24:31 +00:00
d35bdcad13 Compress blank lines
Suppress empty lines left after automated xlat conversion.
2014-05-30 22:10:21 +00:00
0ed617bd66 Generate xlat/*.in files
Automatically convert xlat structures from *.c files to xlat/*.in files
using "./generate_xlat_in.sh *.c" command.
2014-05-30 21:40:03 +00:00
99a0544f01 Refactor LDT decoding
* configure.ac (AC_CHECK_TYPES): Remove struct user_desc.
* ldt.c: New file.
* Makefile.am (strace_SOURCES): Add ldt.c.
* mem.c: Do not include <asm/ldt.h>.
(print_ldt_entry): Remove.
(sys_modify_ldt, sys_set_thread_area, sys_get_thread_area): Move...
* ldt.c: ... here.
* process.c: Do not include <asm/ldt.h>.
(sys_clone) [I386 || X86_64 || X32]: Use print_user_desc.
2014-04-10 15:29:13 +00:00
15bc281269 mips: enable decoding of set_thread_area
* linux/dummy.h [MIPS]: Do not redirect sys_set_thread_area to printargs.
* mem.c [MIPS] (sys_set_thread_area): Define.
2014-04-09 13:14:44 +00:00
f94e84780e x32: decode clone LDT user_desc entries for x86 processes
* mem.c [X32]: Include asm/ldt.h.
[X32] (print_ldt_entry, sys_modify_ldt, sys_set_thread_area,
sys_get_thread_area): Define.
* process.c [X32]: Include asm/ldt.h.
(sys_clone) [X32]: Decode LDT entry if current_personality == 1.
2014-04-09 12:37:01 +00:00
Elliott Hughes
44655a451e x86-64: decode clone LDT user_desc entries for x86 processes
* mem.c [X86_64]: Include asm/ldt.h.
[X86_64] (print_ldt_entry, sys_modify_ldt, sys_set_thread_area,
sys_get_thread_area): Define.
* process.c [X86_64]: Include asm/ldt.h.
(sys_clone) [X86_64]: Decode LDT entry if current_personality == 1.

Signed-off-by: Elliott Hughes <enh@google.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
2014-04-09 12:36:47 +00:00
5945273533 Use XLAT_END macro
Automatically update all xlat structures using the following sed regexp:
s/^[[:space:]]*{[[:space:]]*0[[:space:]]*,[[:space:]]*NULL[[:space:]]*,\?[[:space:]]*}[[:space:]]*,\?[[:space:]]*/\tXLAT_END/
2014-02-05 02:28:18 +00:00
bce0cc6a2d Use XLAT macro
Automatically convert all xlat structures to XLAT form
using the following sed regexp:
s/^[[:space:]]*{[[:space:]]*\([^",}[:space:]]\+\)[[:space:]]*,[[:space:]]*"\1",\?[[:space:]]*}[[:space:]]*/\tXLAT(\1)/
2014-02-05 01:33:50 +00:00