107 lines
3 KiB
Diff
107 lines
3 KiB
Diff
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From: Mark Mitchell <mark@codesourcery.com>
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Sender: gcc-patches-owner@gcc.gnu.org
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To: gcc-patches@gcc.gnu.org
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Subject: C++ PATCH: PR 17976
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Date: Thu, 14 Oct 2004 21:24:41 -0700
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This was a case where we generated multiple destructor calls for the
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same global variable, in the (probably rare) situation that an
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"extern" declaration followed the definition.
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Tested on i686-pc-linux-gnu, applied on the mainline and on the 3.4
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branch.
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--
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Mark Mitchell
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CodeSourcery, LLC
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mark@codesourcery.com
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# DP: 2004-10-14 Mark Mitchell <mark@codesourcery.com>
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# DP:
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# DP: PR c++/17976
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# DP: * decl.c (cp_finish_decl): Do not call expand_static_init more
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# DP: than once for a single variable.
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# DP:
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# DP: 2004-10-14 Mark Mitchell <mark@codesourcery.com>
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# DP:
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# DP: PR c++/17976
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# DP: * g++.dg/init/dtor3.C: New test.
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Index: testsuite/g++.dg/init/dtor3.C
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===================================================================
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RCS file: testsuite/g++.dg/init/dtor3.C
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diff -N testsuite/g++.dg/init/dtor3.C
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*** /dev/null 1 Jan 1970 00:00:00 -0000
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--- gcc/gcc/testsuite/g++.dg/init/dtor3.C 15 Oct 2004 04:02:22 -0000
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***************
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*** 0 ****
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--- 1,21 ----
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+ // PR c++/17976
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+ // { dg-do run }
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+
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+ extern "C" void abort();
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+ struct A
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+ {
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+ static int i;
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+ A(){}
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+ ~A(){i++;if(i>1)abort();}
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+ };
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+
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+ int A::i = 0;
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+
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+ A a;
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+ extern A a;
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+
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+ int main()
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+ {
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+ return 0;
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+ }
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+
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===================================================================
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RCS file: /cvs/gcc/gcc/gcc/cp/decl.c,v
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retrieving revision 1.1174.2.26
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retrieving revision 1.1174.2.27
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diff -u -r1.1174.2.26 -r1.1174.2.27
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--- gcc/gcc/cp/decl.c 2004/10/10 21:54:59 1.1174.2.26
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+++ gcc/gcc/cp/decl.c 2004/10/15 04:23:46 1.1174.2.27
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@@ -4778,6 +4778,7 @@
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tree cleanup;
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const char *asmspec = NULL;
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int was_readonly = 0;
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+ bool var_definition_p = false;
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if (decl == error_mark_node)
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return;
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@@ -4930,6 +4931,11 @@
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/* Remember that the initialization for this variable has
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taken place. */
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DECL_INITIALIZED_P (decl) = 1;
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+ /* This declaration is the definition of this variable,
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+ unless we are initializing a static data member within
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+ the class specifier. */
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+ if (!DECL_EXTERNAL (decl))
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+ var_definition_p = true;
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}
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/* If the variable has an array type, lay out the type, even if
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there is no initializer. It is valid to index through the
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@@ -5004,8 +5010,16 @@
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initialize_local_var (decl, init);
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}
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- if (TREE_STATIC (decl))
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- expand_static_init (decl, init);
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+ /* If a variable is defined, and then a subsequent
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+ definintion with external linkage is encountered, we will
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+ get here twice for the same variable. We want to avoid
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+ calling expand_static_init more than once. For variables
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+ that are not static data members, we can call
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+ expand_static_init only when we actually process the
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+ initializer. It is not legal to redeclare a static data
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+ member, so this issue does not arise in that case. */
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+ if (var_definition_p && TREE_STATIC (decl))
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+ expand_static_init (decl, init);
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}
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finish_end0:
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