The problem is that the use of VG_(system) causes a SIGCHLD to be sent
to the process, which ends up being delivered to one of the proxy LWPs
(which is a small problem in itself, but nothing too bad).
The proxy tells the scheduler LWP about this, and the scheduler LWP sends
a sigACK reply.
Then, while the proxy LWP is in the SigACK state, and the SigACK reply
is still queued in the message pipe, the scheduler LWP starts shutting
Valgrind down, and sends a SIGVGKILL to all proxy LWPs. This causes
the proxy to drop from sigACK state to WaitReq state, and it reads
further commands - one of which is the SigACK message - this causes the
assertion failure.
The fix is to simply make the proxy LWP exit immediately when it gets
a SIGVGKILL, and not process any more requests.
This change also fixes a bug in VG_(system), in which the child process
returns back into Valgrind rather than exiting when exec fails.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2284
input so that the output is well known regardless of whether the test is
run from a terminal or from cron.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2276
2.3.3, which is binary-compatible, but not source compatible with the old one,
which came from LinuxThreads. We were using the types defined in the old one,
which caused compilation errors on systems using the new one.
This commit introduces our own versions of these types. Our versions are laid
out identically to the LinuxThreads ones, but the field names are different.
We convert all pthread types to our versions before using them, so we don't
rely on the pthreadtypes.h types any more. Hopefully this will fix the
problem; I have three reports that it does. Let's see...
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2272
recvmsg() where I'm not sure if it should be checked, and if so, what error
should be returned if the check fails.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2268
"foo<bar::blat>"; normally stabs names are terminated by ':', but we
also need to keep track of <> pairs so we can ignore nested colons.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2267
segment to be moved up to stage2's brk segment. Instead, Valgrind's
use of brk is simulated with mmap. In order to prevent any unwanted use
of the process brk segment, it also sets the RLIMIT_DATA to 0, which will
make brk always fail. glibc's malloc will use mmap to allocate if brk
fails. We try to intercept glibc's brk, but malloc seems to always use the
library-internal version. (The client's use of brk has always been simulated,
and is unaffected by this change.)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2266
Patch to ignore REP prefixes on single byte RET instructions.
(REP RET is apparently faster than RET on AMD K7/K8)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2257
limit for file descriptors to try and prevent the target programming realising
that the reserved file descriptors exist. It also appears to fix
sysconf(_SC_OPEN_MAX) so that must be going through the same system call.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2250
This patch adds translation tests for most of the basic x86 instructions and
fixes a few missing/broken instructions to work properly.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2242
scopes and out of order line number information in the stabs debug info.
I wonder if this is the stabs writer rotting now that dwarf is the
default...
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2240
Doesn't fix "make distcheck", however, because this happens:
/usr/bin/ld: cannot open linker script file ../../coregrind/x86/stage2.lds:
No such file or directory
For some reason I can't work out, that file is built when you make in a CVS
tree, or manually from a "make dist" tarball, but not when you "make
distcheck".
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2239
the assember was getting fiddly. It now masks out only the undefined
or unimplemented parts of the feature set bits, so it now passes through
all the non-ISA-related feature bits to clients.
It also leaves the vendor ID string unmolested, so that clients can
extract vendor-specific information like extended brand strings and
cache/TLB configuration info.
It does, however, implement some Valgrind-specific requests at 0xd8000000,
though at present the only functionality is the ValgrindVCPU signature.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2236
- introduced DIS() and DIP() macros to shorten debug printing
- introduce jmp_lit(), jcc_lit(), jmp_treg() for common UCode sequences
- replace many unnecessary dis?dis_buf:NULL tests with dis_buf, by
changing the tests in disAMode()
Overall, reduced code size by about 230 lines.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2234
