Hi!
On the attached testcase prg_ctr_mask is non-zero, presumably set
while there still were some functions in the TU, but later on none of them
are being emitted. This leads to n_functions in coverage_obj_finish being
0, and the array thus containing 0x100000000 elements.
Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk?
2012-12-12 Jakub Jelinek <ja...@redhat.com>
PR gcov-profile/55650
* coverage.c (coverage_obj_init): Return false if no functions
are being emitted.
* g++.dg/other/pr55650.C: New test.
* g++.dg/other/pr55650.cc: New file.
--- gcc/coverage.c.jj 2012-11-19 14:41:24.000000000 +0100
+++ gcc/coverage.c 2012-12-12 08:54:35.005180211 +0100
@@ -999,6 +999,9 @@ coverage_obj_init (void)
/* The function is not being emitted, remove from list. */
*fn_prev = fn->next;
+ if (functions_head == NULL)
+ return false;
+
for (ix = 0; ix != GCOV_COUNTERS; ix++)
if ((1u << ix) & prg_ctr_mask)
n_counters++;
--- gcc/testsuite/g++.dg/other/pr55650.C.jj 2012-12-12 09:03:53.342876593
+0100
+++ gcc/testsuite/g++.dg/other/pr55650.C 2012-12-12 09:03:11.000000000
+0100
@@ -0,0 +1,21 @@
+// PR gcov-profile/55650
+// { dg-do link }
+// { dg-options "-O2 -fprofile-generate" }
+// { dg-additional-sources "pr55650.cc" }
+
+struct A
+{
+ virtual void foo ();
+};
+
+struct B : public A
+{
+ B ();
+ void foo () {}
+};
+
+inline A *
+bar ()
+{
+ return new B;
+}
--- gcc/testsuite/g++.dg/other/pr55650.cc.jj 2012-12-12 09:03:56.329858741
+0100
+++ gcc/testsuite/g++.dg/other/pr55650.cc 2012-12-12 09:03:48.982900718
+0100
@@ -0,0 +1,4 @@
+int
+main ()
+{
+}
Jakub
