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From: Josef W. <Jos...@gm...> - 2005-01-21 09:28:28
|
On Wednesday 19 January 2005 22:29, Jeremy Fitzhardinge wrote: > [...] > OK, so that's normal call-return: how to deal with longjmp/exceptions? > Well, we could just ignore it. If you call a wrapped function, and it > longjmps back, it means that the "before" function is called but not the > "after", and the cookie store fills up with junk. That's not optimal. With longjmp/exceptions, 2 cookies could be created with the same TID+ESP+RETADDR (same call chain after a exception). Is this a problem? > 3. Generate the call to wrap_after_func, just by overwriting the > standard preamble. What happens if the TC is flushed before the function returns? A retranslation would have to know about changing the preamble. > Comments? What have I forgotten? The calling convention is platform specific. Would it be detectable via configure tests? General function wrapping is expensive. In my tool, I manage my own call stack for this, and insert a callback at start of every BB which syncs/unwinds the call stack according to %ESP. This doesn't need any temporary modification of instrumented code, and works for longjump/execptions in a natural way. As this is slow, it's not useful for general usage. Besides, I don't look at function arguments. But it would be really nice for tools to request for such a general wrapping mechanism; and the call stack clone should be able to always provide a good back trace. Josef > > J > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting > Tool for open source databases. Create drag-&-drop reports. Save time > by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. > Download a FREE copy at http://www.intelliview.com/go/osdn_nl > _______________________________________________ > Valgrind-developers mailing list > Val...@li... > https://lists.sourceforge.net/lists/listinfo/valgrind-developers |
|
From: Tom H. <to...@co...> - 2005-01-21 03:24:44
|
Nightly build on dunsmere ( Fedora Core 3 ) started at 2005-01-21 03:20:03 GMT Checking out source tree ... done Configuring ... done Building ... done Running regression tests ... done Last 20 lines of log.verbose follow seg_override: valgrind --num-callers=4 ./seg_override -- Finished tests in none/tests/x86 ------------------------------------ yield: valgrind --num-callers=4 ./yield -- Finished tests in none/tests ---------------------------------------- == 200 tests, 12 stderr failures, 0 stdout failures ================= helgrind/tests/allok (stderr) helgrind/tests/deadlock (stderr) helgrind/tests/inherit (stderr) helgrind/tests/race (stderr) helgrind/tests/race2 (stderr) helgrind/tests/readshared (stderr) massif/tests/toobig-allocs (stderr) massif/tests/true_html (stderr) massif/tests/true_text (stderr) memcheck/tests/scalar (stderr) memcheck/tests/scalar_supp (stderr) memcheck/tests/vgtest_ume (stderr) make: *** [regtest] Error 1 |
|
From: Tom H. <th...@cy...> - 2005-01-21 03:20:31
|
Nightly build on audi ( Red Hat 9 ) started at 2005-01-21 03:15:02 GMT Checking out source tree ... done Configuring ... done Building ... done Running regression tests ... done Last 20 lines of log.verbose follow helgrind/tests/allok (stderr) helgrind/tests/deadlock (stderr) helgrind/tests/inherit (stderr) helgrind/tests/race (stderr) helgrind/tests/race2 (stderr) helgrind/tests/readshared (stderr) massif/tests/toobig-allocs (stderr) massif/tests/true_html (stderr) massif/tests/true_text (stderr) memcheck/tests/badpoll (stderr) memcheck/tests/buflen_check (stderr) memcheck/tests/execve (stderr) memcheck/tests/execve2 (stderr) memcheck/tests/scalar (stderr) memcheck/tests/scalar_exit_group (stderr) memcheck/tests/scalar_supp (stderr) memcheck/tests/writev (stderr) none/tests/tls (stdout) make: *** [regtest] Error 1 |
|
From: Tom H. <th...@cy...> - 2005-01-21 03:13:15
|
Nightly build on ginetta ( Red Hat 8.0 ) started at 2005-01-21 03:10:02 GMT Checking out source tree ... done Configuring ... done Building ... done Running regression tests ... done Last 20 lines of log.verbose follow vg_stabs.c:1366: dereferencing pointer to incomplete type vg_stabs.c:1370: dereferencing pointer to incomplete type vg_stabs.c:1380: dereferencing pointer to incomplete type vg_stabs.c:1380: dereferencing pointer to incomplete type vg_stabs.c:1384: dereferencing pointer to incomplete type vg_stabs.c:1400: dereferencing pointer to incomplete type vg_stabs.c:1419: dereferencing pointer to incomplete type vg_stabs.c:1432: dereferencing pointer to incomplete type vg_stabs.c:1442: dereferencing pointer to incomplete type vg_stabs.c:1499: dereferencing pointer to incomplete type vg_stabs.c:1534: dereferencing pointer to incomplete type vg_stabs.c:1575: dereferencing pointer to incomplete type vg_stabs.c:1605: dereferencing pointer to incomplete type vg_stabs.c:1649: dereferencing pointer to incomplete type vg_stabs.c:1655: dereferencing pointer to incomplete type make[2]: *** [stage2-vg_stabs.o] Error 1 make[2]: Leaving directory `/tmp/valgrind.15250/valgrind/coregrind' make[1]: *** [check-recursive] Error 1 make[1]: Leaving directory `/tmp/valgrind.15250/valgrind/coregrind' make: *** [check-recursive] Error 1 |
|
From: Tom H. <th...@cy...> - 2005-01-21 03:08:44
|
Nightly build on alvis ( Red Hat 7.3 ) started at 2005-01-21 03:05:02 GMT Checking out source tree ... done Configuring ... done Building ... done Running regression tests ... done Last 20 lines of log.verbose follow yield: valgrind --num-callers=4 ./yield -- Finished tests in none/tests ---------------------------------------- == 198 tests, 14 stderr failures, 0 stdout failures ================= helgrind/tests/allok (stderr) helgrind/tests/deadlock (stderr) helgrind/tests/inherit (stderr) helgrind/tests/race (stderr) helgrind/tests/race2 (stderr) helgrind/tests/readshared (stderr) massif/tests/toobig-allocs (stderr) massif/tests/true_html (stderr) massif/tests/true_text (stderr) memcheck/tests/post-syscall (stderr) memcheck/tests/pth_once (stderr) memcheck/tests/scalar (stderr) memcheck/tests/threadederrno (stderr) memcheck/tests/vgtest_ume (stderr) make: *** [regtest] Error 1 |
|
From: Tom H. <th...@cy...> - 2005-01-21 03:04:21
|
Nightly build on standard ( Red Hat 7.2 ) started at 2005-01-21 03:00:02 GMT Checking out source tree ... done Configuring ... done Building ... done Running regression tests ... done Last 20 lines of log.verbose follow -- Finished tests in none/tests/x86 ------------------------------------ yield: valgrind --num-callers=4 ./yield -- Finished tests in none/tests ---------------------------------------- == 198 tests, 13 stderr failures, 0 stdout failures ================= helgrind/tests/allok (stderr) helgrind/tests/deadlock (stderr) helgrind/tests/inherit (stderr) helgrind/tests/race (stderr) helgrind/tests/race2 (stderr) helgrind/tests/readshared (stderr) massif/tests/toobig-allocs (stderr) massif/tests/true_html (stderr) massif/tests/true_text (stderr) memcheck/tests/pth_once (stderr) memcheck/tests/scalar (stderr) memcheck/tests/threadederrno (stderr) memcheck/tests/vgtest_ume (stderr) make: *** [regtest] Error 1 |