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-rw-r--r--gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.c51
-rw-r--r--gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.exp173
-rw-r--r--gdb/testsuite/gdb.dwarf2/dw2-ranges-base.exp2
3 files changed, 225 insertions, 1 deletions
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.c b/gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.c
new file mode 100644
index 0000000..b760099
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.c
@@ -0,0 +1,51 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+void
+__attribute__((used))
+trivial (void)
+{
+ asm ("trivial_label: .global trivial_label"); /* trivial function */
+}
+
+char global;
+
+void
+watch (void)
+{ /* watch start */
+ asm ("watch_label: .global watch_label");
+ asm ("mov $0x0, %rax");
+ int local = 0; /* watch prologue */
+
+ asm ("watch_start: .global watch_start");
+ asm ("mov $0x1, %rax");
+ local = 1; /* watch assign */
+ asm ("watch_reassign: .global watch_reassign");
+ asm ("mov $0x2, %rax");
+ local = 2; /* watch reassign */
+ asm ("watch_end: .global watch_end"); /* watch end */
+}
+
+int
+main (void)
+{ /* main prologue */
+ asm ("main_label: .global main_label");
+ global = 0;
+ asm ("main_fun_call: .global main_fun_call");
+ watch (); /* main function call */
+ asm ("main_epilogue: .global main_epilogue");
+ global = 10;
+ return 0; /* main end */
+}
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.exp b/gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.exp
new file mode 100644
index 0000000..0109f3e
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-epilogue-begin.exp
@@ -0,0 +1,173 @@
+# Copyright 2022-2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Check that GDB can honor the epilogue_begin flag the compiler can place
+# in the line-table data.
+# We test 2 things: 1. that a software watchpoint triggered in an epilogue
+# is correctly ignored
+# 2. that GDB can mark the same line as both prologue and epilogue
+
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+require dwarf2_support
+# restricted to x86 to make it simpler to follow a variable
+require is_x86_64_m64_target
+
+standard_testfile .c .S
+
+set trivial_line [gdb_get_line_number "trivial function"]
+set main_prologue [gdb_get_line_number "main prologue"]
+set main_epilogue [gdb_get_line_number "main end"]
+set watch_start_line [gdb_get_line_number "watch start"]
+
+set asm_file [standard_output_file $srcfile2]
+
+# The producer will be set to clang because at the time of writing
+# we only care about epilogues if the producer is clang. When the
+# producer is GCC, variables use CFA locations, so watchpoints can
+# continue working even on epilogues.
+Dwarf::assemble $asm_file {
+ global srcdir subdir srcfile srcfile2
+ global trivial_line main_prologue main_epilogue watch_start_line
+ declare_labels lines_label
+
+ get_func_info main
+ get_func_info trivial
+ get_func_info watch
+
+ cu {} {
+ compile_unit {
+ {language @DW_LANG_C}
+ {name dw2-prologue-end.c}
+ {stmt_list ${lines_label} DW_FORM_sec_offset}
+ {producer "clang version 17.0.1"}
+ } {
+ declare_labels char_label
+
+ char_label: base_type {
+ {name char}
+ {encoding @DW_ATE_signed}
+ {byte_size 1 DW_FORM_sdata}
+ }
+
+ subprogram {
+ {external 1 flag}
+ {name trivial}
+ {low_pc $trivial_start addr}
+ {high_pc "$trivial_start + $trivial_len" addr}
+ }
+ subprogram {
+ {external 1 flag}
+ {name watch}
+ {low_pc $watch_start addr}
+ {high_pc "$watch_start + $watch_len" addr}
+ } {
+ DW_TAG_variable {
+ {name local}
+ {type :$char_label}
+ {DW_AT_location {DW_OP_reg0} SPECIAL_expr}
+ }
+ }
+ subprogram {
+ {external 1 flag}
+ {name main}
+ {low_pc $main_start addr}
+ {high_pc "$main_start + $main_len" addr}
+ }
+ }
+ }
+
+ lines {version 5} lines_label {
+ set diridx [include_dir "${srcdir}/${subdir}"]
+ file_name "$srcfile" $diridx
+
+ program {
+ DW_LNS_set_file $diridx
+ DW_LNE_set_address $trivial_start
+ line $trivial_line
+ DW_LNS_set_prologue_end
+ DW_LNS_set_epilogue_begin
+ DW_LNS_copy
+
+ DW_LNE_set_address watch
+ line $watch_start_line
+ DW_LNS_copy
+
+ DW_LNE_set_address watch_start
+ line [gdb_get_line_number "watch assign"]
+ DW_LNS_set_prologue_end
+ DW_LNS_copy
+
+ DW_LNE_set_address watch_reassign
+ line [gdb_get_line_number "watch reassign"]
+ DW_LNS_set_epilogue_begin
+ DW_LNS_copy
+
+ DW_LNE_set_address watch_end
+ line [gdb_get_line_number "watch end"]
+ DW_LNS_copy
+
+ DW_LNE_set_address $main_start
+ line $main_prologue
+ DW_LNS_set_prologue_end
+ DW_LNS_copy
+
+ DW_LNE_set_address main_fun_call
+ line [gdb_get_line_number "main function call"]
+ DW_LNS_copy
+
+ DW_LNE_set_address main_epilogue
+ line $main_epilogue
+ DW_LNS_set_epilogue_begin
+ DW_LNS_copy
+
+ DW_LNE_end_sequence
+ }
+ }
+}
+
+if { [prepare_for_testing "failed to prepare" ${testfile} \
+ [list $srcfile $asm_file] {nodebug}] } {
+ return -1
+}
+
+if ![runto_main] {
+ return -1
+}
+
+# Moving to the scope with a local variable.
+gdb_breakpoint $watch_start_line
+gdb_continue_to_breakpoint "continuing to function" ".*"
+gdb_test "next" "local = 2.*" "stepping to epilogue"
+
+# Forcing software watchpoints because hardware ones don't care if we
+# are in the epilogue or not.
+gdb_test_no_output "set can-use-hw-watchpoints 0"
+
+# Test that the software watchpoint will not trigger in this case
+gdb_test "watch local" "\[W|w\]atchpoint .: local" "set watchpoint"
+gdb_test "continue" ".*\[W|w\]atchpoint . deleted.*" \
+ "confirm watchpoint doesn't trigger"
+
+# First we test that the trivial function has a line with both a prologue
+# and an epilogue. Do this by finding a line that has 3 Y columns
+set sep "\[ \t\]"
+set hex_number "0x\[0-9a-f\]+"
+gdb_test_multiple "maint info line-table" "test epilogue in linetable" -lbl {
+ -re "\[0-9\]$sep+$trivial_line$sep+$hex_number$sep+$hex_number$sep+Y$sep+Y$sep+Y" {
+ pass $gdb_test_name
+ }
+}
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-ranges-base.exp b/gdb/testsuite/gdb.dwarf2/dw2-ranges-base.exp
index ee274ee..170b0a1 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-ranges-base.exp
+++ b/gdb/testsuite/gdb.dwarf2/dw2-ranges-base.exp
@@ -174,7 +174,7 @@ gdb_test_multiple "maint info line-table gdb.dwarf2/dw2-ranges-base.c" \
-re ".*linetable: \\(\\(struct linetable \\*\\) 0x0\\):\r\nNo line table.\r\n" {
exp_continue
}
- -re ".*linetable: \\(\\(struct linetable \\*\\) $hex\\):\r\nINDEX\[ \t\]+LINE\[ \t\]+REL-ADDRESS\[ \t\]+UNREL-ADDRESS\[ \t\]+IS-STMT\[ \t\]PROLOGUE-END *\r\n" {
+ -re ".*linetable: \\(\\(struct linetable \\*\\) $hex\\):\r\nINDEX\[ \t\]+LINE\[ \t\]+REL-ADDRESS\[ \t\]+UNREL-ADDRESS\[ \t\]+IS-STMT\[ \t\]PROLOGUE-END\[ \t\]EPILOGUE-BEGIN *\r\n" {
exp_continue
}
}
generated by cgit v1.1 at 2024-11-04 09:27:41 +0000