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In the record-btrace target, while replaying, we can only provide the PC register. The btrace state is stored in the thread_info. So, when trying to determine whether we are currently replaying, GDB calls find_thread_ptid() to obtain the thread_info. It also asserts that we do have a thread_info. For new threads, libthread-db may fetch registers before the thread is known to GDB. In this case, find_thread_ptid() returns nullptr and the assertion fails. Forward the fetch_registers request to the target beneath in that case. gdb/ChangeLog: 2020-03-19 Markus Metzger <markus.t.metzger@intel.com> * record-btrace.c (record_btrace_target::fetch_registers): Forward request if we do not have a thread_info. gdb/testsuite/ChangeLog: 2020-03-19 Markus Metzger <markus.t.metzger@intel.com> * gdb.btrace/enable-new-thread.c: New test. * gdb.btrace/enable-new-thread.exp: New file.
58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
# This testcase is part of GDB, the GNU debugger.
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#
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# Copyright 2020 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test that new threads of recorded inferiors also get recorded.
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if { [skip_btrace_tests] } {
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unsupported "target does not support record-btrace"
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return -1
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}
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standard_testfile
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if [prepare_for_testing "failed to prepare" $testfile $srcfile {debug pthreads}] {
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return -1
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}
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if ![runto_main] {
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untested "failed to run to main"
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return -1
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}
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# Record the main thread. Recording will automatically be enabled for the
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# other thread.
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gdb_test "record btrace"
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gdb_breakpoint [gdb_get_line_number "bp.1" $srcfile]
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gdb_continue_to_breakpoint "cont to bp.1" ".*/\\* bp\.1 \\*/.*"
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proc check_thread_recorded { num } {
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global decimal
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with_test_prefix "thread $num" {
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gdb_test "thread $num" "Switching to thread $num.*"
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gdb_test "info record" [multi_line \
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"Active record target: record-btrace" \
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".*" \
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"Recorded $decimal instructions in $decimal functions \[^\\\r\\\n\]*" \
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]
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}
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}
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check_thread_recorded 1
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check_thread_recorded 2
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