From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25147 invoked by alias); 20 Mar 2013 18:58:18 -0000 Mailing-List: contact gdb-prs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-prs-owner@sourceware.org Received: (qmail 25121 invoked by uid 55); 20 Mar 2013 18:58:18 -0000 From: "cvs-commit at gcc dot gnu.org" To: gdb-prs@sourceware.org Subject: [Bug gdb/15289] "set remote hardware-watchpoint-limit" broken (zinteger commands) Date: Wed, 20 Mar 2013 18:58:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gdb X-Bugzilla-Component: gdb X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: cvs-commit at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 X-SW-Source: 2013-q1/txt/msg00474.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=15289 --- Comment #2 from cvs-commit at gcc dot gnu.org 2013-03-20 18:58:17 UTC --- CVSROOT: /cvs/src Module name: src Changes by: palves@sourceware.org 2013-03-20 18:58:16 Modified files: gdb : ChangeLog gdb/cli : cli-setshow.c gdb/testsuite : ChangeLog gdb/testsuite/gdb.base: remote.exp Log message: Fix PR gdb/15289 - "set remote hardware-watchpoint-limit" broken (zinteger commands) This is a regression from 7.5, introduced/exposed by: http://sourceware.org/ml/gdb-patches/2012-07/msg00259.html There are a series of issues with this code. It does: unsigned int val = parse_and_eval_long (arg); ^^^^^^^^^^^^ (unsigned, usually 32-bit) while parse_and_eval_long returns a LONGEST (usually 64-bit), so we lose precision without noticing: (gdb) set remote hardware-watchpoint-limit 0x100000000 (gdb) show remote hardware-watchpoint-limit 0x100000000 The maximum number of target hardware watchpoints is 0. While at it, print the invalid number with plongest, so the user sees what GDB thought the number was: (gdb) set remote hardware-watchpoint-limit 0x100000000 integer 4294967296 out of range So with "set remote hardware-watchpoint-limit -1", val ends converted to 0xffffffff, which then fails the else if (val >= INT_MAX) error (_("integer %u out of range"), val); test. Looking at that INT_MAX check, we forbid INT_MAX itself, but we shouldn't, as that does fit in 'int' -- we want to forbid values _greater_ than INT_MAX (and less than INT_MIN, while at it): (gdb) set remote hardware-watchpoint-limit 2147483647 integer 2147483647 out of range The same problem is in the new var_zuinteger_unlimited code, which also uses "int" for variable. Also, when printing a 'signed int', we should use %d, not %u. This adds a couple regression tests. Not completely thorough in checking all kinds of invalid input; I'm saving more exaustive testing around zXXinteger commands for something like new test-assisting commands like "maint test cmd-zinteger -1", where testing would focus on the command types, and thus be independent of particular user commands of particular GDB features. Tested on x86_64 Fedora 17. gdb/ 2013-03-20 Pedro Alves PR gdb/15289 * cli/cli-setshow.c (do_set_command) : Use LONGEST for variable holding the result of parsing the command argument. Throw error if the value is greater than UINT_MAX. Print the invalid value with plongest. : Use LONGEST for variable holding the result of parsing the command argument. Throw error if the value is greater than INT_MAX, not greater or equal. Also throw error if the value is less than INT_MIN. Print the invalid value with plongest. : Throw error if the value is greater than INT_MAX, not greater or equal. (do_show_command) : Use %d for printing int, not %u. gdb/testsuite/ 2013-03-20 Pedro Alves PR gdb/15289 * gdb.base/remote.exp: Test "set remote hardware-watchpoint-limit -1", "set remote hardware-breakpoint-limit -1", "set remote hardware-watchpoint-limit 2147483647" and "set remote hardware-breakpoint-limit 2147483647". Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.15289&r2=1.15290 http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/cli/cli-setshow.c.diff?cvsroot=src&r1=1.55&r2=1.56 http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/ChangeLog.diff?cvsroot=src&r1=1.3590&r2=1.3591 http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.base/remote.exp.diff?cvsroot=src&r1=1.22&r2=1.23 -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.