c56e7c4390
This patch adjusts the testing strategy used in a couple of testcases
where we are trying to print the value of a global variable defined
at multiple locations. The problem is that the actual value depends
on the platform. So instead of hard-coding the expected value in
the testcase script, we use local variables (in the inferior) holding
the correct value, and we compare the global variable's value with
the local variable's value.
gdb/testsuite/ChangeLog:
* gdb.base/ctxobj-f.c (GET_VERSION): Introduce local variable
and add comment.
* gdb.base/ctxobj-m.c (main): Rewrite, and add comment.
* gdb.base/ctxobj.exp: Insert breakpoint in ctxobj-f.c using
"STOP" marker. Adjust testing strategy to make it work on
all targets.
* gdb.base/print-file-var-main.c (main): Rewrite using local
variables and adjust get_version_2's return value check.
Add small comment.
* gdb.base/print-file-var.exp: Insert breakpoint using "STOP"
marker. Adjust testing strategy to make it work on all targets.
86 lines
3 KiB
Text
86 lines
3 KiB
Text
# Copyright 2012 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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set executable print-file-var-main
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set lib1 "print-file-var-lib1"
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set lib2 "print-file-var-lib2"
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set libobj1 "${objdir}/${subdir}/${lib1}.so"
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set libobj2 "${objdir}/${subdir}/${lib2}.so"
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set lib_opts { debug additional_flags=-fPIC }
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if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib1}.c \
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${libobj1} \
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${lib_opts} ] != "" } {
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return -1
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}
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if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib2}.c \
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${libobj2} \
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${lib_opts} ] != "" } {
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return -1
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}
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if { [gdb_compile "${srcdir}/${subdir}/${executable}.c" \
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"${objdir}/${subdir}/${executable}" \
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executable \
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[list debug shlib=${libobj1} shlib=${libobj2}]]
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!= ""} {
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return -1
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}
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clean_restart $executable
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if ![runto_main] {
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untested "could not run to main"
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return -1
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}
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# Try printing "this_version_num" qualified with the name of the file
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# where the variables are defined. There are two global variables
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# with that name, and some systems such as GNU/Linux merge them
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# into one single entity, while some other systems such as Windows
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# keep them separate. In the first situation, we have to verify
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# that GDB does not randomly select the wrong instance, even when
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# a specific filename is used to qualified the lookup. And in the
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# second case, we have to verify that GDB does select the instance
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# defined in the given filename.
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#
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# To avoid adding target-specific code in this testcase, the program
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# sets two local variable named 'v1' and 'v2' with the value of
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# our global variables. This allows us to compare the value that
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# GDB returns for each query against the actual value seen by
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# the program itself.
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# Get past the initialization of variables 'v1' and 'v2'.
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set bp_location \
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[gdb_get_line_number "STOP" "${executable}.c"]
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gdb_test "break $executable.c:$bp_location" \
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"Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
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"breapoint past v1 & v2 initialization"
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gdb_test "continue" \
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"Breakpoint \[0-9\]+, main \\(\\) at.*" \
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"continue to STOP marker"
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# Now check the value of this_version_id in both print-file-var-lib1.c
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# and print-file-var-lib2.c.
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gdb_test "print 'print-file-var-lib1.c'::this_version_id == v1" \
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" = 1"
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gdb_test "print 'print-file-var-lib2.c'::this_version_id == v2" \
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" = 1"
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