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[140.211.15.137]) by smtp.gmail.com with ESMTPSA id d81sm19745089pfj.77.2016.02.26.06.04.04 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 26 Feb 2016 06:04:05 -0800 (PST) From: Yao Qi X-Google-Original-From: Yao Qi To: gdb-patches@sourceware.org Subject: [PATCH 7/7] New test about step over clone syscall Date: Fri, 26 Feb 2016 14:04:00 -0000 Message-Id: <1456495426-7520-8-git-send-email-yao.qi@linaro.org> In-Reply-To: <1456495426-7520-1-git-send-email-yao.qi@linaro.org> References: <1455892594-2294-1-git-send-email-yao.qi@linaro.org> <1456495426-7520-1-git-send-email-yao.qi@linaro.org> X-IsSubscribed: yes X-SW-Source: 2016-02/txt/msg00853.txt.bz2 This patch adds a new test for stepping over clone syscall. 2016-02-26 Yao Qi * gdb.base/step-over-syscall.exp (step_over_syscall): Kfail. Invoke step_over_syscall "clone" and break_cond_on_syscall "clone". * gdb.base/step-over-clone.c: New file. --- gdb/testsuite/gdb.base/step-over-clone.c | 54 ++++++++++++++++++++++++++++ gdb/testsuite/gdb.base/step-over-syscall.exp | 21 +++++++++++ 2 files changed, 75 insertions(+) create mode 100644 gdb/testsuite/gdb.base/step-over-clone.c diff --git a/gdb/testsuite/gdb.base/step-over-clone.c b/gdb/testsuite/gdb.base/step-over-clone.c new file mode 100644 index 0000000..57ecbbf --- /dev/null +++ b/gdb/testsuite/gdb.base/step-over-clone.c @@ -0,0 +1,54 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright 2016 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#define _GNU_SOURCE +#include +#include +#include + +static void +marker () +{} + +#define STACK_SIZE 0x1000 + +static int +clone_fn (void *unused) +{ + return 0; +} + +int +main (void) +{ + int i, pid; + unsigned char *stack[6]; + + for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++) + stack[i] = malloc (STACK_SIZE); + + for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++) + { + pid = clone (clone_fn, stack[i] + STACK_SIZE, CLONE_FILES | CLONE_VM, + NULL); + } + + for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++) + free (stack[i]); + + marker (); +} diff --git a/gdb/testsuite/gdb.base/step-over-syscall.exp b/gdb/testsuite/gdb.base/step-over-syscall.exp index 5d2b296..3c1beb7 100644 --- a/gdb/testsuite/gdb.base/step-over-syscall.exp +++ b/gdb/testsuite/gdb.base/step-over-syscall.exp @@ -124,6 +124,13 @@ proc step_over_syscall { syscall } { continue } + if { $displaced == "on" && $syscall == "clone" } { + # GDB doesn't support stepping over clone syscall with + # displaced stepping. + kfail "gdb/19675" "single step over clone" + continue + } + set ret [setup $syscall] set syscall_insn_addr [lindex $ret 0] @@ -193,6 +200,18 @@ proc break_cond_on_syscall { syscall } { gdb_test "break \*$syscall_insn_addr if main == 0" \ "Breakpoint \[0-9\]* at .*" + if { $syscall == "clone" } { + # Create a breakpoint in the child with the condition that + # evals false, so that GDBserver can get the event from the + # child but GDB doesn't see it. In this way, we don't have + # to adjust the test flow for "clone". + # This is a regression test for PR server/19736. In this way, + # we can test that GDBserver gets an event from the child and + # set suspend count correctly while the parent is stepping over + # the breakpoint. + gdb_test "break clone_fn if main == 0" + } + gdb_test "break marker" "Breakpoint.*at.* file .*${testfile}.c, line.*" gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, marker \\(\\) at.*" \ "continue to marker ($syscall)" @@ -201,6 +220,7 @@ proc break_cond_on_syscall { syscall } { step_over_syscall "fork" step_over_syscall "vfork" +step_over_syscall "clone" set testfile "step-over-fork" clean_restart $testfile @@ -225,4 +245,5 @@ gdb_test_multiple $test $test { if { $cond_bp_target } { break_cond_on_syscall "fork" break_cond_on_syscall "vfork" + break_cond_on_syscall "clone" } -- 1.9.1