I pushed the following. Although the bug is fixed in GCC 4.7 that has
only been released last month. Most distros are still based on 4.6 or
lower.
commit d9bc75fc20f0ce5064cac192a518af3c7192e96d
Author: Mark Wielaard <mjw(a)redhat.com>
Date: Mon May 7 13:29:52 2012 +0200
tests/low_high_pc.c: Allow highpc == lowpc for CU DIEs for buggy GCC.
GCC < 4.7 had a bug where no code CUs got a highpc == lowpc.
Allow that, because it is not the main purpose of this test.
diff --git a/tests/ChangeLog b/tests/ChangeLog
index abc7340..4c6e9f7 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,7 @@
+2012-05-07 Mark Wielaard <mjw(a)redhat.com>
+
+ * low_high_pc.c: Allow highpc == lowpc for CU DIEs for buggy GCC.
+
2012-04-27 Mark Wielaard <mjw(a)redhat.com>
* Makefile.am (TESTS): Add run-low_high_pc.sh
diff --git a/tests/low_high_pc.c b/tests/low_high_pc.c
index 3054046..6fc8b15 100644
--- a/tests/low_high_pc.c
+++ b/tests/low_high_pc.c
@@ -72,9 +72,12 @@ handle_die (Dwarf_Die *die, void *arg)
if (dwarf_highpc (die, &highpc) != 0 && dwarf_hasattr (die,
DW_AT_high_pc))
fail (off, name, "has DW_AT_high_pc but dwarf_highpc fails");
+ /* GCC < 4.7 had a bug where no code CUs got a highpc == lowpc.
+ Allow that, because it is not the main purpose of this test. */
if (dwarf_hasattr (die, DW_AT_low_pc)
&& dwarf_hasattr (die, DW_AT_high_pc)
- && highpc <= lowpc)
+ && highpc <= lowpc
+ && ! (dwarf_tag (die) == DW_TAG_compile_unit && highpc == lowpc))
{
printf("lowpc: %lx, highpc: %lx\n", lowpc, highpc);
fail (off, name, "highpc <= lowpc");
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