Detect broken ptrace in gdb_skip_float_test
We recently found a ARM kernel ptrace bug http://lists.infradead.org/pipermail/linux-arm-kernel/2016-May/431962.html Details can be found in the comment in gdb_skip_float_test. We can skip floating point tests if the kernel bug is detected. This patch adds more code in gdb_skip_float_test to detect the broken ptrace on arm-linux. Such detection should be done at the beginning of the test, because it starts a fresh GDB, so change the test cases to invoke gdb_skip_float_test at the beginning of test, and use its return value afterwards. Since gdb_skip_float_test becomes a gdb_caching_proc, so it can't have an argument, this patch also removes argument "msg", which isn't useful. gdb/testsuite: 2016-09-02 Yao Qi <yao.qi@linaro.org> * gdb.arch/arm-neon.exp: Skip it if gdb_skip_float_test returns true. * gdb.base/call-ar-st.exp: Invoke gdb_skip_float_test. * gdb.base/call-rt-st.exp: Likewise. * gdb.base/call-sc.exp: Invoke gdb_skip_float_test and use its return value instead of gdb,skip_float_test. * gdb.base/callfuncs.exp: Invoke gdb_skip_float_test. (do_function_calls): Use its return value instead of gdb,skip_float_test. * gdb.base/finish.exp: Likewise. * gdb.base/funcargs.exp: Likewise. * gdb.base/return.exp: Likewise. * gdb.base/return2.exp: Likewise. * gdb.base/varargs.exp: Likewise. * lib/gdb.exp (gdb_skip_float_test): Change it to gdb_caching_proc. Detect the broken ptrace on arm-linux.
This commit is contained in:
Yao Qi
parent
db0a1c2b66
commit
27aba0477a
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@ -1,3 +1,22 @@
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2016-09-02 Yao Qi <yao.qi@linaro.org>
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* gdb.arch/arm-neon.exp: Skip it if gdb_skip_float_test returns
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true.
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* gdb.base/call-ar-st.exp: Invoke gdb_skip_float_test.
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* gdb.base/call-rt-st.exp: Likewise.
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* gdb.base/call-sc.exp: Invoke gdb_skip_float_test and use its
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return value instead of gdb,skip_float_test.
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* gdb.base/callfuncs.exp: Invoke gdb_skip_float_test.
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(do_function_calls): Use its return value instead of
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gdb,skip_float_test.
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* gdb.base/finish.exp: Likewise.
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* gdb.base/funcargs.exp: Likewise.
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* gdb.base/return.exp: Likewise.
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* gdb.base/return2.exp: Likewise.
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* gdb.base/varargs.exp: Likewise.
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* lib/gdb.exp (gdb_skip_float_test): Change it to
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gdb_caching_proc. Detect the broken ptrace on arm-linux.
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2016-08-30 Andreas Arnez <arnez@linux.vnet.ibm.com>
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* gdb.multi/tids.exp: Test "thread apply all".
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@ -20,6 +20,11 @@ if {![istarget "aarch64*-*-*"] && ![istarget "arm*-*-*"]} {
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return
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}
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if { [gdb_skip_float_test] } {
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verbose "Skipping ${gdb_test_file_name}."
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return
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}
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standard_testfile
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if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} {debug quiet}] } {
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unsupported "ARM NEON is not supported"
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@ -33,6 +33,8 @@ if [get_compiler_info] {
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return -1
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}
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set skip_float_test [gdb_skip_float_test]
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if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} {
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untested $testfile.exp
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return -1
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@ -65,7 +67,7 @@ gdb_test continue \
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#call print_double_array(double_array)
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if {![gdb_skip_float_test "print print_double_array(double_array)"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_double_array(double_array)"] } {
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gdb_test_stdio "print print_double_array(double_array)" \
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@ -126,7 +128,7 @@ gdb_test "tbreak $stop_line" \
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"Temporary breakpoint.* file .*$srcfile, line $stop_line.*" \
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"tbreakpoint at tbreak3"
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if {![gdb_skip_float_test "continuing to tbreak3"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "continuing to tbreak3"] } {
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gdb_test_stdio "continue" \
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@ -168,7 +170,7 @@ if ![gdb_skip_stdio_test "next over print_int_array in print_all_arrays"] {
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}
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#call print_double_array(array_d)
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if {![gdb_skip_float_test "print print_double_array(array_d)"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_double_array(array_d)"] } {
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gdb_test_stdio "print print_double_array(array_d)" \
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@ -186,7 +188,7 @@ gdb_test "tbreak $stop_line" \
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"Temporary breakpoint.* file .*$srcfile, line $stop_line.*" \
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"tbreakpoint at tbreak4"
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if {![gdb_skip_float_test "continuing to tbreak4"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "continuing to tbreak4"] } {
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gdb_test_stdio "continue" \
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@ -305,7 +307,7 @@ if ![gdb_skip_stdio_test "continuing to tbreak6"] {
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# *flags, *flags_combo, *three_char, *five_char,
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# *int_char_combo, *d1, *d2, *d3, *f1, *f2, *f3)
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if {![gdb_skip_float_test "print print_small_structs(...)"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_small_structs(...)"] } {
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gdb_test_stdio "print print_small_structs(*struct1, *struct2, *struct3, *struct4, *flags, *flags_combo, *three_char, *five_char, *int_char_combo, *d1, *d2, *d3, *f1, *f2, *f3)" \
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[multi_line \
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@ -369,7 +371,7 @@ gdb_test "print compute_with_small_structs(20)" \
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#call print_ten_doubles(123.456, 123.456, -0.12, -1.23, 343434.8, 89.098,
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# 3.14, -5678.12345, -0.11111111, 216.97065)
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if {![gdb_skip_float_test "print print_ten_doubles(...)"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_ten_doubles(...)"]} {
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gdb_test_stdio "print print_ten_doubles(123.456, 123.456, -0.12, -1.23, 343434.8, 89.098, 3.14, -5678.12345, -0.11111111, 216.97065)" \
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[multi_line \
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@ -397,7 +399,7 @@ gdb_test "tbreak print_long_arg_list" \
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# The short match case below handles cases where a buffer
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# overflows or something, and expect can't deal with the full
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# line. Perhaps a more elegant solution exists... -sts 1999-08-17
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if {![gdb_skip_float_test "step into print_long_arg_list"]} {
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if {!$skip_float_test} {
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gdb_test_multiple "continue" "step into print_long_arg_list" {
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-re ".*print_long_arg_list \\(a=22.25, b=33.375, c=0, d=-25, e=100, f=2345, struct1=\{value = 6, head = 0\}, struct2=\{value = 10, head = 0\}, struct3=\{value = 12, head = 0\}, struct4=\{value = 14, head = 0\}, flags=\{alpha = 1, beta = 0, gamma = 1, delta = 0, epsilon = 1, omega = 0\}, flags_combo=\{alpha = 1, beta = 0, ch1 = 121 \'y\', gamma = 1, delta = 0, ch2 = 110 \'n\', epsilon = 1, omega = 0\}, three_char=\{ch1 = 97 \'a\', ch2 = 98 \'b\', ch3 = 99 \'c\'\}, five_char=\{ch1 = 108 \'l\', ch2 = 109 \'m\', ch3 = 110 \'n\', ch4 = 111 \'o\', ch5 = 112 \'p\'\}, int_char_combo=\{int1 = 123, ch1 = 122 \'z\'\}, d1=\{double1 = 10.5\}, d2=\{double1 = -3.375\}, d3=\{double1 = 675.09375\}, f1=\{float1 = 45.2340012, float2 = 43.5999985\}, f2=\{float1 = 78.0100021, float2 = 122.099998\}, f3=\{float1 = -1232.34497, float2 = -199.210007\}\\) at .*${srcfile}:$stop_line\[\r\n\]+$stop_line\[ \t\]+printf\\(\"double :.*\", a\\);.*$gdb_prompt $" {
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pass "step into print_long_arg_list"
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@ -419,7 +421,7 @@ set ws "\[\n\r\t \]+"
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# flags_combo, three_char, five_char, int_char_combo,
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# d1, d2, d3, f1, f2, f3)
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if {![gdb_skip_float_test "print_small_structs from print_long_arg_list"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print_small_structs from print_long_arg_list"] } {
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# On 32-bit SPARC, some of the args are passed by ref, others by
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@ -520,7 +522,7 @@ gdb_test continue "Continuing\\..*main \\(\\) at .*$srcfile:$stop_line\[\r\n\t \
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#call print_long_arg_list(a, b, c, d, e, f, *struct1, *struct2, *struct3, *struct4, *flags, *flags_combo, *three_char, *five_char, *int_char_combo, *d1, *d2, *d3, *f1, *f2, *f3)
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if {![gdb_skip_float_test "print print_long_arg_list"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_long_arg_list"] } {
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gdb_test_stdio "print print_long_arg_list(a, b, c, d, e, f, *struct1, *struct2, *struct3, *struct4, *flags, *flags_combo, *three_char, *five_char, *int_char_combo, *d1, *d2, *d3, *f1, *f2, *f3)" \
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@ -44,6 +44,8 @@ if [target_info exists gdb,cannot_call_functions] {
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continue
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}
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set skip_float_test [gdb_skip_float_test]
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# Start with a fresh gdb.
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clean_restart ${binfile}
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@ -128,14 +130,14 @@ if ![gdb_skip_stdio_test "print print_one_large_struct(...)"] {
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".\[0-9\]+ = \\{next_index = \\{1, 2, 3, 4, 5, 6, 7, 8, 9, 10\\}, values = \\{4, 6, 8, 10, 12, 14, 16, 18, 20, 22\\}, head = 0\\}"
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}
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if {![gdb_skip_float_test "print print_one_double(*d1)"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_one_double(*d1)"] } {
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print_struct_call "print_one_double(*d1)" \
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".*Contents of one_double_t:\[ \r\n\]+1\\.111110\[ \r\n\]+" \
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".\[0-9\]+ = \\{double1 = 1\\.111\[0-9\]*\\}"
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}
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if {![gdb_skip_float_test "print print_two_floats(*f3)"] && \
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if {!$skip_float_test && \
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![gdb_skip_stdio_test "print print_two_floats(*f3)"] } {
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print_struct_call "print_two_floats(*f3)" \
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".*Contents of two_floats_t:\[ \r\n\]+-2\\.345000\[ \t]+1\\.000000\[ \r\n\]+" \
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@ -35,6 +35,7 @@ standard_testfile .c
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if [get_compiler_info] {
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return -1
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}
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set skip_float_test [gdb_skip_float_test]
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# Compile a variant of scalars.c using TYPE to specify the type of the
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# parameter and return-type. Run the compiled program up to "main".
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@ -427,7 +428,7 @@ start_scalars_test tll
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test_scalar_calls
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test_scalar_returns
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if ![target_info exists gdb,skip_float_tests] {
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if {!$skip_float_test} {
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# Approx size: 4, 8, ...
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start_scalars_test tf
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test_scalar_calls
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@ -30,6 +30,8 @@ if [target_info exists gdb,cannot_call_functions] {
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continue
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}
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set skip_float_test [gdb_skip_float_test]
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# FIXME: Before calling this proc, we should probably verify that
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# we can call inferior functions and get a valid integral value
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# returned.
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@ -38,7 +40,7 @@ if [target_info exists gdb,cannot_call_functions] {
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# (computed in the inferior) is 1 for true and 0 for false.
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proc do_function_calls {} {
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global gdb_prompt
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global gdb_prompt skip_float_test
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# We need to up this because this can be really slow on some boards.
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set timeout 60
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@ -71,7 +73,7 @@ proc do_function_calls {} {
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gdb_test "p t_long_values(789,long_val2)" " = 1"
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gdb_test "p t_long_values(long_val1,-321)" " = 1"
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if ![target_info exists gdb,skip_float_tests] {
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if {!$skip_float_test} {
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gdb_test "p t_float_values(0.0,0.0)" " = 0"
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# These next four tests fail on the mn10300.
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@ -199,7 +201,7 @@ proc do_function_calls {} {
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gdb_test "p t_structs_l(struct_val1)" "= 51" \
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"call inferior func with struct - returns long"
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if ![target_info exists gdb,skip_float_tests] {
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if {!$skip_float_test} {
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gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
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"call inferior func with struct - returns float"
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gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
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@ -15,6 +15,7 @@
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# This file was written by Michael Snyder (msnyder@redhat.com)
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set skip_float_test [gdb_skip_float_test]
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# re-use the program from the "return2" test.
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if { [prepare_for_testing finish.exp finish return2.c] } {
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@ -86,7 +87,7 @@ proc finish_abbreviation { abbrev } {
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}
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proc finish_tests { } {
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global gdb_prompt
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global gdb_prompt skip_float_test
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if { ! [ runto_main ] } then {
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untested finish.exp
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@ -99,7 +100,7 @@ proc finish_tests { } {
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finish_1 "int"
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finish_1 "long"
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finish_1 "long_long"
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if ![target_info exists gdb,skip_float_tests] {
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if {!$skip_float_test} {
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finish_1 "float"
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finish_1 "double"
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}
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@ -29,6 +29,8 @@ if [get_compiler_info] {
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return -1
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}
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set skip_float_test [gdb_skip_float_test]
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if {[prepare_for_testing $testfile.exp $testfile $srcfile $compile_flags]} {
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untested $testfile.exp
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return -1
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@ -1155,7 +1157,7 @@ gdb_test_no_output "set print frame-arguments all"
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integral_args
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unsigned_integral_args
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if {![target_info exists gdb,skip_float_tests]} {
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if {!$skip_float_test} {
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float_and_integral_args
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}
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@ -1165,7 +1167,7 @@ if [support_complex_tests] {
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complex_integral_args
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if {![target_info exists gdb,skip_float_tests]} {
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if {!$skip_float_test} {
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complex_float_integral_args
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}
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}
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@ -19,8 +19,10 @@ if { [prepare_for_testing return.exp "return"] } {
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return -1
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}
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set skip_float_test [gdb_skip_float_test]
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proc return_tests { } {
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global gdb_prompt
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global gdb_prompt skip_float_test
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if { ! [ runto func1 ] } then { return 0 }
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@ -88,7 +90,7 @@ proc return_tests { } {
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# is not xfailed.
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setup_xfail "sparc-*-solaris2.3*" "sparc-*-solaris2.4*" "m6811-*-*"
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if ![target_info exists gdb,skip_float_tests] {
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if {!$skip_float_test} {
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gdb_test "p tmp3" ".* = 5.*" \
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"correct value returned double test (known problem with sparc solaris)"
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}
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@ -23,6 +23,8 @@ if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {deb
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return -1
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}
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set skip_float_test [gdb_skip_float_test]
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proc return_1 { type } {
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global gdb_prompt
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@ -77,7 +79,7 @@ proc return_void { } {
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}
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proc return2_tests { } {
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global gdb_prompt
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global gdb_prompt skip_float_test
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if { ! [ runto_main ] } then {
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untested return2.exp
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@ -92,7 +94,7 @@ proc return2_tests { } {
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if { ! [istarget "m6811-*-*"] && ![istarget "h8300*-*"] } then {
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return_1 "long_long"
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}
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if ![target_info exists gdb,skip_float_tests] {
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if {!$skip_float_test} {
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return_1 "float"
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if { ! [istarget "m6811-*-*"] } then {
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return_1 "double"
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@ -37,6 +37,8 @@ if [get_compiler_info] {
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return -1
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}
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set skip_float_test [gdb_skip_float_test]
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set additional_flags {debug}
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if [support_complex_tests] {
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lappend additional_flags "additional_flags=-DTEST_COMPLEX"
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@ -87,7 +89,7 @@ gdb_test_stdio "print find_max2(3,1,2,3)" \
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".\[0-9\]+ = 3" \
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"print find_max2(3,1,2,3)"
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if {![target_info exists gdb,skip_float_tests]} {
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if {!$skip_float_test} {
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gdb_test_stdio "print find_max_double(5,1.0,17.0,2.0,3.0,4.0)" \
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"find_max\\(.*\\) returns 17\\.000000\[ \r\n\]+" \
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".\[0-9\]+ = 17" \
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@ -4882,14 +4882,102 @@ proc rerun_to_main {} {
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}
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}
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# Print a message and return true if a test should be skipped
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||||
# due to lack of floating point suport.
|
||||
# Return true if a test should be skipped due to lack of floating
|
||||
# point support or GDB can't fetch the contents from floating point
|
||||
# registers.
|
||||
|
||||
proc gdb_skip_float_test { msg } {
|
||||
gdb_caching_proc gdb_skip_float_test {
|
||||
if [target_info exists gdb,skip_float_tests] {
|
||||
verbose "Skipping test '$msg': no float tests."
|
||||
return 1
|
||||
}
|
||||
|
||||
# There is an ARM kernel ptrace bug that hardware VFP registers
|
||||
# are not updated after GDB ptrace set VFP registers. The bug
|
||||
# was introduced by kernel commit 8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f
|
||||
# in 2012 and is fixed in e2dfb4b880146bfd4b6aa8e138c0205407cebbaf
|
||||
# in May 2016. In other words, kernels older than 4.6.3, 4.4.14,
|
||||
# 4.1.27, 3.18.36, and 3.14.73 have this bug.
|
||||
# This kernel bug is detected by check how does GDB change the
|
||||
# program result by changing one VFP register.
|
||||
if { [istarget "arm*-*-linux*"] } {
|
||||
|
||||
set compile_flags {debug nowarnings }
|
||||
|
||||
# Set up, compile, and execute a test program having VFP
|
||||
# operations.
|
||||
set src [standard_temp_file arm_vfp[pid].c]
|
||||
set exe [standard_temp_file arm_vfp[pid].x]
|
||||
|
||||
gdb_produce_source $src {
|
||||
int main() {
|
||||
double d = 4.0;
|
||||
int ret;
|
||||
|
||||
asm ("vldr d0, [%0]" : : "r" (&d));
|
||||
asm ("vldr d1, [%0]" : : "r" (&d));
|
||||
asm (".global break_here\n"
|
||||
"break_here:");
|
||||
asm ("vcmp.f64 d0, d1\n"
|
||||
"vmrs APSR_nzcv, fpscr\n"
|
||||
"bne L_value_different\n"
|
||||
"movs %0, #0\n"
|
||||
"b L_end\n"
|
||||
"L_value_different:\n"
|
||||
"movs %0, #1\n"
|
||||
"L_end:\n" : "=r" (ret) :);
|
||||
|
||||
/* Return $d0 != $d1. */
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
verbose "compiling testfile $src" 2
|
||||
set lines [gdb_compile $src $exe executable $compile_flags]
|
||||
file delete $src
|
||||
|
||||
if ![string match "" $lines] then {
|
||||
verbose "testfile compilation failed, returning 1" 2
|
||||
return 0
|
||||
}
|
||||
|
||||
# No error message, compilation succeeded so now run it via gdb.
|
||||
# Run the test up to 5 times to detect whether ptrace can
|
||||
# correctly update VFP registers or not.
|
||||
set skip_vfp_test 0
|
||||
for {set i 0} {$i < 5} {incr i} {
|
||||
global gdb_prompt srcdir subdir
|
||||
|
||||
gdb_exit
|
||||
gdb_start
|
||||
gdb_reinitialize_dir $srcdir/$subdir
|
||||
gdb_load "$exe"
|
||||
|
||||
runto_main
|
||||
gdb_test "break *break_here"
|
||||
gdb_continue_to_breakpoint "break_here"
|
||||
|
||||
# Modify $d0 to a different value, so the exit code should
|
||||
# be 1.
|
||||
gdb_test "set \$d0 = 5.0"
|
||||
|
||||
set test "continue to exit"
|
||||
gdb_test_multiple "continue" "$test" {
|
||||
-re "exited with code 01.*$gdb_prompt $" {
|
||||
}
|
||||
-re "exited normally.*$gdb_prompt $" {
|
||||
# However, the exit code is 0. That means something
|
||||
# wrong in setting VFP registers.
|
||||
set skip_vfp_test 1
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
gdb_exit
|
||||
remote_file build delete $exe
|
||||
|
||||
return $skip_vfp_test
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue