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| author | Jakub Jelinek <jakub@redhat.com> | 2011-05-23 20:07:43 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-05-23 20:07:43 +0200 |
| commit | 9166988f2635469e9e7a85e0473df7b0eee689ee (patch) | |
| tree | f455a1ce76ac8044485fea91c9fb66093a4de7f3 /gcc/dbxout.c | |
| parent | 0e0d82a784effdcfab26696cab66d03ed5f22300 (diff) | |
| download | gcc-9166988f2635469e9e7a85e0473df7b0eee689ee.zip gcc-9166988f2635469e9e7a85e0473df7b0eee689ee.tar.gz gcc-9166988f2635469e9e7a85e0473df7b0eee689ee.tar.bz2 | |
re PR debug/49032 (-gstabs generates reference to deleted static variable)
PR debug/49032
* dbxout.c: Include cgraph.h.
(dbxout_expand_expr): If a VAR_DECL is TREE_STATIC, not written
and without value expr, return NULL if no varpool node exists for
it or if it is not needed.
* Makefile.in (dbxout.o): Depend on $(CGRAPH_H).
* gcc.dg/debug/pr49032.c: New test.
From-SVN: r174083
Diffstat (limited to 'gcc/dbxout.c')
| -rw-r--r-- | gcc/dbxout.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/dbxout.c b/gcc/dbxout.c index 3190803..be43ed3 100644 --- a/gcc/dbxout.c +++ b/gcc/dbxout.c @@ -91,6 +91,7 @@ along with GCC; see the file COPYING3. If not see #include "langhooks.h" #include "obstack.h" #include "expr.h" +#include "cgraph.h" #ifdef XCOFF_DEBUGGING_INFO #include "xcoffout.h" @@ -2470,6 +2471,20 @@ dbxout_expand_expr (tree expr) disable debug info for these variables. */ if (!targetm.have_tls && DECL_THREAD_LOCAL_P (expr)) return NULL; + if (TREE_STATIC (expr) + && !TREE_ASM_WRITTEN (expr) + && !DECL_HAS_VALUE_EXPR_P (expr) + && !TREE_PUBLIC (expr) + && DECL_RTL_SET_P (expr) + && MEM_P (DECL_RTL (expr))) + { + /* If this is a var that might not be actually output, + return NULL, otherwise stabs might reference an undefined + symbol. */ + struct varpool_node *node = varpool_get_node (expr); + if (!node || !node->needed) + return NULL; + } /* FALLTHRU */ case PARM_DECL: |