of memcheck and helgrind in a common module:
pub_tool_addrinfo.h pub_core_addrinfo.h m_addrinfo.c
At the same time, the factorised code is made usable by other
tools also (and is used by the gdbserver command 'v.info location'
which replaces the helgrind 'describe addr' introduced 1 week ago
and which is now callable by all tools).
The new address description code can describe more addresses
(e.g. for memcheck, if the block is not on the free list anymore,
but is in an arena free list, this will also be described).
Similarly, helgrind address description can now describe more addresses
when --read-var-info=no is given (e.g. global symbols are
described, or addresses on the stack are described as
being on the stack, freed blocks in the arena free list are
described, ...).
See e.g. the change in helgrind/tests/annotate_rwlock.stderr.exp
or locked_vs_unlocked2.stderr.exp
The patch touches many files, but is basically a lot of improvements
in helgrind output files.
The code changes are mostly refactorisation of existing code.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13965
- Helgrind GDB server monitor command 'describe <address>'
allowing to describe an address (e.g. where it was allocated).
- Helgrind GDB server monitor command 'info locks' giving
the list of locks, their location, and their status.
In a further patch, it is intended to
1. factorise the describe address code between memcheck and helgrind
2. generalise the describe address gdbsrv command so as to make
it usable for all tools.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13930
to ask GDB server to stop before program execution, at the end
of the program execution and on Valgrind internal errors.
- A new monitor command "v.set hostvisibility" that allows GDB server
to provide access to Valgrind internal host status/memory.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13900
making it easier to understand the memory and/or oom situation.
No functional (user level) change.
* For --profile-heap=yes, sort the cost centers by decreasing size,
so that the most relevant cost centers are closed to the arena
total.
* factorise duplicated code calling a series of print stat functions
* VG_(show_sched_status)
optionally show the host stacktrace
the amount of valgrind stack used by each thread
the exited threads
* various functions: update to add VG_(show_sched_status) new
args, keeping the same info production as before.
* In case of out of memory situation detected by m_mallocfree.c,
reports more information:
valgrind and tool stats
scheduler status (full information)
* gdbserver v.info scheduler :
show full information.
The oom behaviour/reporting was tested using a small
program causing an OOM, and having several threads
(some terminated, some still active).
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13897
* addition of VG_(needs_print_stats) in pub_tool_tooliface.h
* use the above in memcheck and helgrind
* output valgrind stats and calls print_stats in server.c
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13760
to put a "marker" msg in process log output
* v.info n_errs_found accepts optional msg, added in the output of
the monitor command.
* use VG_(printf) rather than VG_(gdb_printf) when output of command
should be redirected according to v.set gdb_output|log_output|mixed_output
* also avoid calling gdb_printf in output sink processing
to output zero bytes, as gdb_printf expects to have a null terminated
string, which is not ensured when 0 bytes have to be output.
* some minor reformatting (replace char* xxx by char *xxx).
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13532
On Ubuntu systems, ptrace_scoping could forbid a process to ptrace another.
This ptrace scoping was already handled for vgdb by using SET_PTRACER
(the valgrind process must be ptraced by vgdb when it is blocked
in a syscall).
set_ptracer is however also needed when the old mechanism --db-attach=yes
is used.
The following changes are done:
* make the set_ptracer logic callable outside gdbserver
* make set_ptracer less restrictive (i.e. allow all
processes of the user to ptrace). This removes a limitation for vgdb.
* call the set_ptracer in the child launched for --db-attach=yes
* cleaned up the ptrace scope restriction message and doc as vgdb
is now working properly by default, even with ptrace_scope enabled.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13384
(useful to check the sanity of valgrind on request and/or from GDB,
when an error is reported by the tool).
Also re-order the NEWS entries to put the internals things after
the user level new functions.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13262
information about the stack traces recorded by Valgrind.
This can be used to analyse one possible cause of Valgrind high
memory usage for some programs.
At work, a big set of regression tests crashed out of memory under Valgrind.
Two main causes for out of memory were identified:
1. big memory usage for stacktrace (exe contexts) recording by Valgrind
2. big number of partially initialised bytes.
This patch adds a gdbsrv monitor command that output (very) detailed
information about all the recorded exe context.
This has been used to analyse the problem 1. above,
showing the following identified causes for a (too) big nr of execontexts:
A. When the JIT handles an unknown SP update, even when --track-origins=no,
an execontext is (uselessly) created and recorded
to track the (never used) origin of some uninitialised stack memory.
This creates a whole bunch of 'one IP' execontexts.
B. same problem in handling some system calls (at least the brk system
calls always records an origin, even when --track-origins=yes).
C. The Valgrind unwinder cannot properly unwind some stack traces.
It unwinds a few frames, then go bezerk and stops at a "random" IP.
This then causes the same "logical" stacktrace to be truncated
and records thousands of times with this "differentiating" last IP.
For problem cause 2 above ( a lot of partially initialised bytes),
the idea is to similarly add another gdbsrv commands that will output
statistics about which stack traces are causing a lot of uninitialised bytes.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13220
(allows to have the list of opened fds and the associated info
on request from GDB or from the shell, using vgdb)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13072
* Option --vex-iropt-precise-memory-exns has been removed.
It is replaced by --vex-iropt-register-updates which accepts
3 values : 'unwindregs-at-mem-access' (replacing
--vex-iropt-precise-memory-exns=no), 'allregs-at-mem-access'
(replacing --vex-iropt-precise-memory-exns=yes)
and a new value 'allregs-at-each-insn'.
'allregs-at-each-insn' allows the Valgrind gdbserver to always
show up to date values to GDB.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12809
During investigations of 303963, Josef found that flags are not always
up to date and that --vex-guest-max-insns=1 ensures flags values
are (more?) correct.
=> enhance the paragraph in the gdbserver limitations to reference
this option and give an idea of the performance impact of the other
options helping to increase the precision of registers and flags.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12778
This implies to change the interface between the
arch independent gdbserver files and the arch dependent files
as AVX implies a choice of xml files at run time.
In valgrind-low-amd64.c, the xml files and the nr of registers
are different depending on AVX support or not.
Other platforms still have a fully static nr of registers.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12581
When investigating Valgrind out of memory situation,
it is useful to be able to output the list of segments of the
aspacemgr at any moment.
The GDB monitor command "v.info memory" has now an optional
argument allowing to output this list of segments
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12544
Similar to r12444 (see Log below), but this is doing it for x86 and amd64.
The xmm registers are using uint32 or uint64 for their float
union components. For the i387 80 bits float registers, as there is
no uint80, a struct uint16 + uint64 is defined.
Log:
Change the type of the shadow regs for floating point registers
to be uint64. Previously the value in such a shadow reg would
be interpreted by gdb as a floating point value which would
produce non-sensible output for e.g p/x $f1s1.
This patch covers the power and arm architectures.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12445
* make a reference to --vex-iropt-precise-memory-exns=yes
to obtain up to date registers values.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12416
Using n_errs_shown allows the user to stop on an error
identified in a previous run by counting errors shown.
* shows also n_errs_shown in monitor command v.info n_errs_found
* slightly clarified the manual, updated to new output of v.info n_errs_found
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12388
* In core advanced manual, replace 3.7.0 by current release.
* cleanup in m_gdbserver/README_DEVELOPPERS
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12320
* fix various typos in doc
* following commit in gdb
http://sourceware.org/ml/gdb-patches/2011-07/msg00742.html
means unlimited length for valgrind watchpoints is understood by the
(future) gdb 7.4 => doc updated
* factorize gdb version detection and reporting in
gdbserver_tests/make_local_links
* replace zignal by signal in a string used in umsg.
* updated gdbserver_tests/README_DEVELOPPERS (ref to --port vgdb option)
No functional change, tested on f12/x86, debian5/amd64, s390/RHEL4
Fixes#278892. (Philippe Waroquiers, philippe.waroquiers@skynet.be)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12223
Monitor command useful for debugging/investigation of Valgrind unwinder and/or
gdbserver/gdb stack trace.
The Valgrind unwinder has some limitations compared to the GDB unwinder.
(see e.g. 278972).
With this monitor command, it is easy to see if the Valgrind unwinder
produces something different than the GDB unwinder.
Fixes#279212. (Philippe Waroquiers, philippe.waroquiers@skynet.be)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12203
--cmd-time-out
* changed prefixes of Valgrind core monitor commands from vg. to v.
* removed prefixes of Tool monitor commands
* memcheck leak_check 'leakpossible' arg renamed to 'possibleleak'
* memcheck make_memory 'ifaddressabledefined' arg renamed to
'Definedifaddressable'
(with uppercase D to avoid confusion with 'defined' arg).
* vgdb options
- Some doc updates : more logical option order documentation,
specify 'standalone' for options aimed at standalone usage.
- added option --cmd-time-out for standalone vgdb
(comment of Josef Weindendorfer, needed to interface with a callgrind GUI)
* updated tests according to the above.
* updated documentation according to the above.
* some additional minor doc fixes/clarifications
(Philippe Waroquiers, philippe.waroquiers@skynet.be). Bug 214909
comment 111.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11844
--vgdb-error=N is specified, print a bit of text telling the user the
magic commands to give GDB in order to attach to the process.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11822
- Match the ordering of the non-tool-specific options in the usage message
with the order in the user manual. As a result, we now always print
--alignment and --trace-malloc in the core's usage messages, which saves
malloc-replacing tools from doing it themselves (and brings it in line
with options that only apply to error-collecting tools).
- Improved the presentation of the Vex options with --help-debug.
- Removed documentation of -d in the manual because it's a debugging-only flag.
- Documented --read-var-info in the manual. This fixes bug 201169.
- Renamed --auto-run-dsymutil as --dsymutil and documented it in the usage
message.
- Fixed an XML error in manual-core-adv.xml.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10703
VALGRIND_{PRINTF,PRINTF_BACKTRACE,INTERNAL_PRINTF} were no longer appending
newlines. This meant that --trace-malloc=yes spewed everything onto a
single line, among other things.
Rather than adding the newline back in, I chose to offically change their
behaviour to not add the newlines, as this is more flexible (and the reason
for the underlying VG_(message) change). I updated all the relevant places
I could find.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10694
line options. This commit changes them to all <option>.
Also make consistent how options with multiple names (eg. -h --help) are
shown.
Also, remove section describing --help and --version in Callgrind's chapter;
these aren't necessary and are presumably a hangover from when Callgrind was
a separate tool.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10659
on some advanced aspects of the core (client requests, function
wrapping) and move stuff from the main core manual into it.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7208
