[gdb/testsuite] Fix FAILs due to PR gcc/101452
When running test-case gdb.base/ptype-offsets.exp with gcc-11 (with -gdwarf-5
default) or gcc-10 with target board unix/gdb:debug_flags=-gdwarf-5 we run
into this regression:
...
(gdb) ptype/o static_member^M
/* offset | size */ type = struct static_member {^M
- static static_member Empty;^M
/* 0 | 4 */ int abc;^M
^M
/* total size (bytes): 4 */^M
}^M
-(gdb) PASS: gdb.base/ptype-offsets.exp: ptype/o static_member
+(gdb) FAIL: gdb.base/ptype-offsets.exp: ptype/o static_member
...
This is caused by missing debug info, which I filed as gcc PR101452 - "[debug,
dwarf-5] undefined static member removed by
-feliminate-unused-debug-symbols".
It's not clear yet whether this is a bug or a feature, but work around this in
the test-cases by:
- defining the static member
- adding additional_flags=-fno-eliminate-unused-debug-types.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2021-07-20 Tom de Vries <tdevries@suse.de>
* lib/gdb.exp (gcc_major_version): New proc.
* gdb.base/ptype-offsets.cc: Define static member static_member::Empty.
* gdb.cp/templates.exp: Define static member using -DGCC_BUG.
* gdb.cp/m-static.exp: Add
additional_flags=-fno-eliminate-unused-debug-types.
* gdb.cp/pr-574.exp: Same.
* gdb.cp/pr9167.exp: Same.
diff --git a/gdb/testsuite/gdb.base/ptype-offsets.cc b/gdb/testsuite/gdb.base/ptype-offsets.cc
index dc21e34..7678fc6 100644
--- a/gdb/testsuite/gdb.base/ptype-offsets.cc
+++ b/gdb/testsuite/gdb.base/ptype-offsets.cc
@@ -185,6 +185,9 @@
int abc;
};
+/* Work around PR gcc/101452. */
+static_member static_member::Empty;
+
struct empty_member
{
struct { } empty;
diff --git a/gdb/testsuite/gdb.cp/m-static.exp b/gdb/testsuite/gdb.cp/m-static.exp
index 8260ca3..1593203 100644
--- a/gdb/testsuite/gdb.cp/m-static.exp
+++ b/gdb/testsuite/gdb.cp/m-static.exp
@@ -31,8 +31,14 @@
return -1
}
+set flags [list debug c++]
+if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
+ # Work around PR gcc/101452.
+ lappend flags additional_flags=-fno-eliminate-unused-debug-types
+}
+
if {[prepare_for_testing "failed to prepare" $testfile \
- [list $srcfile $srcfile2] {debug c++}]} {
+ [list $srcfile $srcfile2] $flags]} {
return -1
}
diff --git a/gdb/testsuite/gdb.cp/pr-574.exp b/gdb/testsuite/gdb.cp/pr-574.exp
index dab52fd..da596f1 100644
--- a/gdb/testsuite/gdb.cp/pr-574.exp
+++ b/gdb/testsuite/gdb.cp/pr-574.exp
@@ -32,7 +32,13 @@
return -1
}
-if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
+set flags [list debug c++]
+if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
+ # Work around PR gcc/101452.
+ lappend flags additional_flags=-fno-eliminate-unused-debug-types
+}
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile $flags]} {
return -1
}
diff --git a/gdb/testsuite/gdb.cp/pr9167.exp b/gdb/testsuite/gdb.cp/pr9167.exp
index 34508f7..d88c75d 100644
--- a/gdb/testsuite/gdb.cp/pr9167.exp
+++ b/gdb/testsuite/gdb.cp/pr9167.exp
@@ -15,7 +15,13 @@
standard_testfile .cc
-if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
+set flags [list debug c++]
+if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
+ # Work around PR gcc/101452.
+ lappend flags additional_flags=-fno-eliminate-unused-debug-types
+}
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile $flags]} {
return -1
}
diff --git a/gdb/testsuite/gdb.cp/templates.exp b/gdb/testsuite/gdb.cp/templates.exp
index 4d58942..8b905e4 100644
--- a/gdb/testsuite/gdb.cp/templates.exp
+++ b/gdb/testsuite/gdb.cp/templates.exp
@@ -27,7 +27,13 @@
return -1
}
-if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
+set flags [list debug c++]
+if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
+ # Work around PR gcc/101452.
+ lappend flags additional_flags=-DGCC_BUG
+}
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile $flags]} {
return -1
}
diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index e79e062..16c4664 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -3998,6 +3998,27 @@
return [string match $compiler $compiler_info]
}
+# Return the gcc major version, or -1.
+# For gcc 4.8.5, the major version is 4.8.
+# For gcc 7.5.0, the major version 7.
+
+proc gcc_major_version { } {
+ global compiler_info
+ global decimal
+ if { ![test_compiler_info "gcc-*"] } {
+ return -1
+ }
+ set res [regexp gcc-($decimal)-($decimal)- $compiler_info \
+ dummy_var major minor]
+ if { $res != 1 } {
+ return -1
+ }
+ if { $major >= 5} {
+ return $major
+ }
+ return $major.$minor
+}
+
proc current_target_name { } {
global target_info
if [info exists target_info(target,name)] {
