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32d0add0 | 1 | # Copyright 2014-2015 Free Software Foundation, Inc. |
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2 | |
3 | # This program is free software; you can redistribute it and/or modify | |
4 | # it under the terms of the GNU General Public License as published by | |
5 | # the Free Software Foundation; either version 3 of the License, or | |
6 | # (at your option) any later version. | |
7 | # | |
8 | # This program is distributed in the hope that it will be useful, | |
9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | # GNU General Public License for more details. | |
12 | # | |
13 | # You should have received a copy of the GNU General Public License | |
14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | # Test that when following an exec, we don't try to insert breakpoints | |
17 | # in the new image at the addresses the symbols had before the exec. | |
18 | ||
19 | # Remote protocol does not support follow-exec notifications. | |
20 | ||
21 | if [is_remote target] { | |
22 | continue | |
23 | } | |
24 | ||
25 | standard_testfile | |
26 | ||
27 | # Build two copies of the program, each linked at a different address. | |
28 | # The address of "main" in the first binary should end up being an | |
29 | # unmapped address in the second binary. | |
30 | ||
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31 | set objfile ${binfile}.o |
32 | set exec1 ${binfile}1 | |
33 | set exec2 ${binfile}2 | |
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35 | if { [gdb_compile [file join $srcdir $subdir $srcfile] $objfile \ |
36 | object [list debug]] != "" } { | |
37 | untested "compile failed" | |
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38 | return -1 |
39 | } | |
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40 | |
41 | set opts1_ld [list debug ldflags=-Wl,-Ttext-segment=0x1000000] | |
42 | set opts1_gold [list debug ldflags=-Wl,-Ttext=0x1000000] | |
43 | set opts2_ld [list debug ldflags=-Wl,-Ttext-segment=0x2000000] | |
44 | set opts2_gold [list debug ldflags=-Wl,-Ttext=0x2000000] | |
45 | ||
46 | if { [gdb_compile $objfile $exec1 executable $opts1_ld] != "" } { | |
47 | # Old gold linker versions don't support -Ttext-segment. Fall | |
48 | # back to -Ttext. | |
49 | if { [gdb_compile $objfile $exec1 executable $opts1_gold] != "" | |
50 | || [gdb_compile $objfile $exec2 executable $opts2_gold] != ""} { | |
51 | untested "link failed" | |
52 | return -1 | |
53 | } | |
54 | } elseif { [gdb_compile $objfile $exec2 executable $opts2_ld] != "" } { | |
55 | untested "link failed" | |
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56 | return -1 |
57 | } | |
58 | ||
59 | # First check whether the address of "main" in exec1 is readable in | |
60 | # exec2. If it is, then skip the test as unsupported. | |
61 | ||
62 | clean_restart ${exec1} | |
63 | if ![runto_main] then { | |
64 | fail "Couldn't run to main" | |
65 | return -1 | |
66 | } | |
67 | ||
68 | set addr "" | |
69 | set test "main address first" | |
70 | gdb_test_multiple "p/x &main" $test { | |
71 | -re " = (0x\[0-9a-f\]+)\r\n$gdb_prompt $" { | |
72 | set addr $expect_out(1,string) | |
73 | pass $test | |
74 | } | |
75 | } | |
76 | ||
77 | clean_restart ${exec2} | |
78 | if ![runto_main] then { | |
79 | fail "Couldn't run to main" | |
80 | return -1 | |
81 | } | |
82 | ||
83 | set cannot_access 0 | |
84 | set test "probe memory access" | |
85 | gdb_test_multiple "x $addr" $test { | |
86 | -re "Cannot access memory at address .*$gdb_prompt $" { | |
87 | set cannot_access 1 | |
88 | pass $test | |
89 | } | |
90 | -re ".*$gdb_prompt $" { | |
91 | pass $test | |
92 | } | |
93 | } | |
94 | ||
95 | if {!$cannot_access} { | |
96 | unsupported "main address is readable in second binary" | |
97 | return | |
98 | } | |
99 | ||
100 | # The test proper. ALWAYS_INSERTED indicates whether testing in | |
101 | # "breakpoint always-inserted" mode. | |
102 | ||
103 | proc test { always_inserted } { | |
104 | global exec1 | |
105 | ||
106 | clean_restart ${exec1} | |
107 | ||
108 | gdb_test_no_output "set breakpoint always-inserted $always_inserted" | |
109 | ||
110 | if ![runto_main] then { | |
111 | fail "Couldn't run to main" | |
112 | return -1 | |
113 | } | |
114 | ||
115 | # On a buggy GDB, with always-inserted on, we'd see: | |
116 | # (gdb) continue | |
117 | # Continuing. | |
118 | # Warning: | |
119 | # Cannot insert breakpoint 1. | |
120 | # Cannot access memory at address 0x10000ff | |
121 | gdb_test "continue" "Breakpoint 1, main.*" "continue across exec" | |
122 | } | |
123 | ||
124 | foreach always_inserted { "off" "on" } { | |
125 | with_test_prefix "always-inserted $always_inserted" { | |
126 | test $always_inserted | |
127 | } | |
128 | } |