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gdb/gdb-rhbz1260558-ppc64le-skip_trampoline_code.patch

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http://sourceware.org/ml/gdb-patches/2015-09/msg00183.html
Subject: [ppc64le patch v3] Use skip_entrypoint for skip_trampoline_code
--mYCpIKhGyMATD0i+
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
An update to PASS the testcase on non-ppc64le archs.
--mYCpIKhGyMATD0i+
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline; filename=4
gdb/ChangeLog
2015-09-07 Jan Kratochvil <jan.kratochvil@redhat.com>
* linespec.c (minsym_found): Call gdbarch_skip_entrypoint.
* ppc64-tdep.c (ppc64_skip_trampoline_code): Rename to ...
(ppc64_skip_trampoline_code_1): ... here.
(ppc64_skip_trampoline_code): New wrapper function.
* symtab.c (find_function_start_sal): Call gdbarch_skip_entrypoint.
gdb/testsuite/ChangeLog
2015-09-07 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.opt/solib-intra-step-lib.c: New file.
* gdb.opt/solib-intra-step-main.c: New file.
* gdb.opt/solib-intra-step.exp: New file.
diff --git a/gdb/linespec.c b/gdb/linespec.c
index 8f102fa..4c29c12 100644
--- a/gdb/linespec.c
+++ b/gdb/linespec.c
@@ -3570,6 +3570,8 @@ minsym_found (struct linespec_state *self, struct objfile *objfile,
sal.pc = MSYMBOL_VALUE_ADDRESS (objfile, msymbol);
sal.pc = gdbarch_convert_from_func_ptr_addr (gdbarch, sal.pc,
&current_target);
+ if (gdbarch_skip_entrypoint_p (gdbarch))
+ sal.pc = gdbarch_skip_entrypoint (gdbarch, sal.pc);
}
else
skip_prologue_sal (&sal);
diff --git a/gdb/ppc64-tdep.c b/gdb/ppc64-tdep.c
index bb23b6a..4a0b93a 100644
--- a/gdb/ppc64-tdep.c
+++ b/gdb/ppc64-tdep.c
@@ -454,8 +454,8 @@ ppc64_standard_linkage4_target (struct frame_info *frame,
When the execution direction is EXEC_REVERSE, scan backward to
check whether we are in the middle of a PLT stub. */
-CORE_ADDR
-ppc64_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+static CORE_ADDR
+ppc64_skip_trampoline_code_1 (struct frame_info *frame, CORE_ADDR pc)
{
#define MAX(a,b) ((a) > (b) ? (a) : (b))
unsigned int insns[MAX (MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage1),
@@ -530,6 +530,20 @@ ppc64_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
return 0;
}
+/* Wrapper of ppc64_skip_trampoline_code_1 checking also
+ ppc_elfv2_skip_entrypoint. */
+
+CORE_ADDR
+ppc64_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+
+ pc = ppc64_skip_trampoline_code_1 (frame, pc);
+ if (pc != 0 && gdbarch_skip_entrypoint_p (gdbarch))
+ pc = gdbarch_skip_entrypoint (gdbarch, pc);
+ return pc;
+}
+
/* Support for convert_from_func_ptr_addr (ARCH, ADDR, TARG) on PPC64
GNU/Linux.
diff --git a/gdb/symtab.c b/gdb/symtab.c
index 1ba691e..f65e809 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -3629,7 +3629,11 @@ find_function_start_sal (struct symbol *sym, int funfirstline)
&& (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal.symtab))
|| SYMTAB_LANGUAGE (sal.symtab) == language_asm))
{
+ struct gdbarch *gdbarch = symbol_arch (sym);
+
sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
+ if (gdbarch_skip_entrypoint_p (gdbarch))
+ sal.pc = gdbarch_skip_entrypoint (gdbarch, sal.pc);
return sal;
}
diff --git a/gdb/testsuite/gdb.opt/solib-intra-step-lib.c b/gdb/testsuite/gdb.opt/solib-intra-step-lib.c
new file mode 100644
index 0000000..9ab1211
--- /dev/null
+++ b/gdb/testsuite/gdb.opt/solib-intra-step-lib.c
@@ -0,0 +1,30 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2015 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/>. */
+
+#include <stdlib.h>
+
+void
+shlib_second (int dummy)
+{ /* second-retry */
+ abort (); /* second-hit */
+}
+
+void
+shlib_first (void)
+{ /* first-retry */
+ shlib_second (0); /* first-hit */
+}
diff --git a/gdb/testsuite/gdb.opt/solib-intra-step-main.c b/gdb/testsuite/gdb.opt/solib-intra-step-main.c
new file mode 100644
index 0000000..186bd5f
--- /dev/null
+++ b/gdb/testsuite/gdb.opt/solib-intra-step-main.c
@@ -0,0 +1,25 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2015 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/>. */
+
+extern void shlib_first (void);
+
+int
+main (void)
+{
+ shlib_first ();
+ return 0;
+}
diff --git a/gdb/testsuite/gdb.opt/solib-intra-step.exp b/gdb/testsuite/gdb.opt/solib-intra-step.exp
new file mode 100644
index 0000000..044c4bd
--- /dev/null
+++ b/gdb/testsuite/gdb.opt/solib-intra-step.exp
@@ -0,0 +1,86 @@
+# Copyright 2015 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/>.
+
+standard_testfile
+
+if {[skip_shlib_tests]} {
+ return 0
+}
+
+# Library file.
+set libname "${testfile}-lib"
+set srcfile_lib ${srcdir}/${subdir}/${libname}.c
+set binfile_lib [standard_output_file ${libname}.so]
+set lib_flags [list debug optimize=-O2]
+# Binary file.
+set testfile "${testfile}-main"
+set srcfile ${srcdir}/${subdir}/${testfile}.c
+set binfile [standard_output_file ${testfile}]
+set bin_flags [list debug shlib=${binfile_lib}]
+
+if [get_compiler_info] {
+ return -1
+}
+
+if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib} $lib_flags] != ""
+ || [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } {
+ untested "Could not compile $binfile_lib or $binfile."
+ return -1
+}
+
+clean_restart ${binfile}
+gdb_load_shlibs $binfile_lib
+
+if ![runto_main] then {
+ return 0
+}
+
+set test "first-hit"
+gdb_test_multiple "step" $test {
+ -re " first-hit .*\r\n$gdb_prompt $" {
+ pass $test
+ }
+ -re " first-retry .*\r\n$gdb_prompt $" {
+ gdb_test "step" " first-hit .*" "first-hit (optimized)"
+ }
+}
+
+set test "second-hit"
+gdb_test_multiple "step" $test {
+ -re " second-hit .*\r\n$gdb_prompt $" {
+ pass $test
+ }
+ -re " first-retry .*\r\n$gdb_prompt $" {
+ set test "second-hit (optimized 1)"
+ gdb_test_multiple "step" $test {
+ -re " second-hit .*\r\n$gdb_prompt $" {
+ pass $test
+ }
+ -re " first-hit .*\r\n$gdb_prompt $" {
+ gdb_test "step" " second-hit .*" "second-hit (optimized 2)"
+ }
+ }
+ }
+ -re " second-retry .*\r\n$gdb_prompt $" {
+ gdb_test "step" " second-hit .*" "second-hit (optimized 3)"
+ }
+}
+
+if ![runto_main] then {
+ return 0
+}
+
+gdb_breakpoint "shlib_second"
+gdb_continue_to_breakpoint "second-hit" ".* (second-hit|second-retry) .*"
--mYCpIKhGyMATD0i+--
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