128 lines
3.5 KiB
Text
128 lines
3.5 KiB
Text
# Copyright 2014-2015 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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# Test that when following an exec, we don't try to insert breakpoints
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# in the new image at the addresses the symbols had before the exec.
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# Remote protocol does not support follow-exec notifications.
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if [is_remote target] {
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continue
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}
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standard_testfile
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# Build two copies of the program, each linked at a different address.
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# The address of "main" in the first binary should end up being an
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# unmapped address in the second binary.
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set objfile ${binfile}.o
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set exec1 ${binfile}1
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set exec2 ${binfile}2
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if { [gdb_compile [file join $srcdir $subdir $srcfile] $objfile \
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object [list debug]] != "" } {
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untested "compile failed"
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return -1
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}
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set opts1_ld [list debug ldflags=-Wl,-Ttext-segment=0x1000000]
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set opts1_gold [list debug ldflags=-Wl,-Ttext=0x1000000]
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set opts2_ld [list debug ldflags=-Wl,-Ttext-segment=0x2000000]
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set opts2_gold [list debug ldflags=-Wl,-Ttext=0x2000000]
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if { [gdb_compile $objfile $exec1 executable $opts1_ld] != "" } {
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# Old gold linker versions don't support -Ttext-segment. Fall
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# back to -Ttext.
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if { [gdb_compile $objfile $exec1 executable $opts1_gold] != ""
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|| [gdb_compile $objfile $exec2 executable $opts2_gold] != ""} {
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untested "link failed"
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return -1
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}
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} elseif { [gdb_compile $objfile $exec2 executable $opts2_ld] != "" } {
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untested "link failed"
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return -1
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}
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# First check whether the address of "main" in exec1 is readable in
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# exec2. If it is, then skip the test as unsupported.
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clean_restart ${exec1}
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if ![runto_main] then {
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fail "Couldn't run to main"
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return -1
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}
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set addr ""
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set test "main address first"
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gdb_test_multiple "p/x &main" $test {
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-re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" {
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set addr $expect_out(1,string)
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pass $test
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}
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}
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clean_restart ${exec2}
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if ![runto_main] then {
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fail "Couldn't run to main"
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return -1
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}
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set cannot_access 0
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set test "probe memory access"
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gdb_test_multiple "x $addr" $test {
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-re "Cannot access memory at address .*$gdb_prompt $" {
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set cannot_access 1
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pass $test
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}
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-re ".*$gdb_prompt $" {
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pass $test
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}
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}
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if {!$cannot_access} {
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unsupported "main address is readable in second binary"
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return
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}
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# The test proper. ALWAYS_INSERTED indicates whether testing in
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# "breakpoint always-inserted" mode.
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proc test { always_inserted } {
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global exec1
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clean_restart ${exec1}
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gdb_test_no_output "set breakpoint always-inserted $always_inserted"
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if ![runto_main] then {
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fail "Couldn't run to main"
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return -1
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}
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# On a buggy GDB, with always-inserted on, we'd see:
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# (gdb) continue
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# Continuing.
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# Warning:
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# Cannot insert breakpoint 1.
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# Cannot access memory at address 0x10000ff
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gdb_test "continue" "Breakpoint 1, main.*" "continue across exec"
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}
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foreach always_inserted { "off" "on" } {
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with_test_prefix "always-inserted $always_inserted" {
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test $always_inserted
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}
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}
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