derek.holloway
7502bf64a4
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81 lines
2.8 KiB
Plaintext
81 lines
2.8 KiB
Plaintext
# Copyright 2008-2024 Free Software Foundation, Inc.
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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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# This file is part of the GDB testsuite.
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#
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# 'reverse-finish' used to have a bug where user breakpoints set at
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# the functions entry would be ignored. Make sure the bug doesn't
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# reappear.
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# The test sets a breakpoint with the command break *void_func to set a
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# breakpoint on the first instruction of the function. The issue is on
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# PowerPC it uses Global Entry Points (GEP) and Local Entry Points (LEP).
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# The GEP is the first instruction in the function. It sets up register
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# r2 and then reaches the LEP.
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#
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# <void_func>:
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# lis r2,4098 <- GEP
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# addi r2,r2,32512
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# mflr r0 <- LEP
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# std r0,16(r1)
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# ....
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#
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# The command break *void_func sets the breakpoint on the GEP. Calling
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# the function with void_func() will enter the function via the LEP. So,
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# this test needs to use a function pointer to call void_func() so the
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# function will be entered via the GEP to work as designed on PowerPC in
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# addition to non-PowerPC systems. On non-PowerPC systems, the GEP and LEP
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# are the same.
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require supports_reverse
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standard_testfile
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if { [prepare_for_testing "failed to prepare" "$testfile" $srcfile] } {
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return -1
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}
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if {![runto_main]} {
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return 0
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}
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if [supports_process_record] {
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# Activate process record/replay
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gdb_test_no_output "record" "turn on process record"
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}
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# Start the test.
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set breakloc [gdb_get_line_number "VOID FUNC" "$srcfile"]
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gdb_test "tbreak void_func" \
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"Temporary breakpoint $decimal at .*$srcfile, line $breakloc\." \
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"set breakpoint on void_func"
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gdb_continue_to_breakpoint "void_func" ".*$srcfile:$breakloc.*"
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# We stop at the brekapoint on void_func, but breakpoint on
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# *void_func will be set at the same place if function void_func doesn't
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# have prologue. One step forward to avoid this.
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gdb_test "si"
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gdb_test "break \*void_func" \
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"Breakpoint $decimal at .*" \
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"set breakpoint at void_func's entry"
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gdb_test "reverse-finish" \
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".*Breakpoint .*, void_func.*" \
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"reverse-finish from void_func trips breakpoint at entry"
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gdb_test "frame" "#0 void_func.*" "no spurious proceed after breakpoint stop"
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