Hi, --- Elder Costa <[EMAIL PROTECTED]> wrote:
> CAI Qian wrote: > > Hi, > > > > --- Elder Costa <[EMAIL PROTECTED]> wrote: > > > >> I have run the latest CVS version and noticed ptrace06 is not being > >> compiled. Previous versions did compile but did not include it in the > >> default test lists so it was not running. > >> > >> Anyway I am getting an error when I run it in two different systems with > >> Ubuntu Feisty: > >> > >> ptrace06 16 FAIL : ptrace(PEEKUSER, ..., 0xc0, (nil)) returned 0 > >> instead of -1 > >> ptrace06 17 PASS : ptrace(PEEKUSER, ..., 0xc1, (nil)) failed as > >> expected > >> ptrace06 18 PASS : ptrace(PEEKUSER, ..., 0xc2, (nil)) failed as > >> expected > >> ptrace06 19 PASS : ptrace(PEEKUSER, ..., 0xc3, (nil)) failed as > >> expected > >> p > >> > >> > >> I understand the test fails because ptrace was supposed to return -1 > >> because the address supplied by the third argument is beyond pt_regs > >> struct boundaries. I did a quick test with Fedora as well and it fails > >> in the very same place. Is this the reason why this test has been > >> suppressed? > >> > > > > Please see my previous two emails regards this test, > > > > > http://sourceforge.net/mailarchive/message.php?msg_name=333986.97998.qm%40web1108.biz.mail.sk1.yahoo.com > > > > and > > > > > http://sourceforge.net/mailarchive/message.php?msg_name=494544.45920.qm%40web1104.biz.mail.sk1.yahoo.com > > > > Cai Qian > > > > Cai. The testcase was compiling fine in my system. Just that particular > combination of parameters fails (with Ubuntu). It looks like a bug to me > either in libc or in the kernel (no bounds check) but I cannot say for > sure and I lack the time to digg deeper (though I am very curious). > It looks like a test code issue. From ptrace(2) manpage, "PTRACE_PEEKUSER Reads a word at offset addr in the childs USER area, which holds the registers and other information about the process (see <linux/user.h> and <sys/user.h>). The word is returned as the result of the ptrace() call. Typically the offset must be word-aligned, though this might vary by architecture. See NOTES. (data is ignored.)". >From the output of your failed test case above, "ptrace06 16 FAIL : ptrace(PEEKUSER, ..., 0xc0, (nil)) returned 0 instead of -1". 0xc0 is word-aligned, so it could succeed. Cai Qian > Regards. > > Elder. > > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
