[gdb/testsuite] Fix exec_is_pie with gold linker

When running test-case gdb.base/break-interp.exp with target board gold, we
run into:
...
gdb compile failed, pie failed to generate PIE executable
...

The problem is that the proc exec_is_pie uses the PIE flag in the readelf -d
output, which doesn't seem to be set by the gold linker.

Instead, use the "Type" field in the readelf -h output.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-25  Tom de Vries  <tdevries@suse.de>

	PR testsuite/26031
	* lib/gdb.exp (exec_is_pie): Test readelf -h output.

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 93d5e7058087953f646da8e6ca03bf37869f97c9..d372b5039098b2f51d8ae74833f31305fa387caa 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-25  Tom de Vries  <tdevries@suse.de>
+
+       PR testsuite/26031
+       * lib/gdb.exp (exec_is_pie): Test readelf -h output.
+
 2020-05-25  Tom de Vries  <tdevries@suse.de>
 
        * boards/gold.exp: New file.

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index f7d20bd94ff0c1b6409f6c2878161998dc8aee4b..7177be941b4fc18226e49de74c0f3f8739bb8f60 100644 (file)
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -5509,11 +5509,12 @@ proc exec_is_pie { executable } {
        return -1
     }
     set readelf_program [gdb_find_readelf]
-    set res [catch {exec $readelf_program -d $executable} output]
+    set res [catch {exec $readelf_program -h $executable} output]
     if { $res != 0 } {
        return -1
     }
-    set res [regexp -line {\(FLAGS_1\).*Flags:.* PIE($| )} $output]
+    set res [regexp -line {^[ \t]*Type:[ \t]*DYN \(Shared object file\)$} \
+                $output]
     if { $res == 1 } {
        return 1
     }