* dwarf_reader.cc (Sized_dwarf_line_info): Include all lines,

	but mark earlier ones as non-canonical
	(offset_to_iterator): Update search target and example
	(do_addr2line): Return extra lines in a vector*
	(format_file_lineno): Extract from do_addr2line
	(one_addr2line): Add vector* out-param
	* dwarf_reader.h (Offset_to_lineno_entry): New field recording
	when a lineno entry appeared last for its instruction
	(Dwarf_line_info): Add vector* out-param
	* object.cc (Relocate_info): Pass NULL for the vector* out-param
	* symtab.cc (Odr_violation_compare): Include the lineno in the
	comparison again.
	(linenos_from_loc): New. Combine the canonical line for an
	address with its other lines.
	(True_if_intersect): New. Helper functor to make
	std::set_intersection a query.
	(detect_odr_violations): Compare sets of lines instead of just
	one line for each function. This became less deterministic, but
	has fewer false positives.
	* symtab.h: Declarations.
	* testsuite/Makefile.am (odr_violation2.o): Compile with -O2 to
	mix an optimized and non-optimized object in the same binary
	(odr_violation2.so): Same.
	* testsuite/Makefile.in: Regenerate from Makefile.am.
	* testsuite/debug_msg.cc (main): Make OdrDerived classes.
	* testsuite/debug_msg.sh: Update line numbers and add
	assertions.
	* testsuite/odr_violation1.cc: Use OdrDerived, in a
	non-optimized context.
	* testsuite/odr_violation2.cc: Make sure Ordering::operator()
	isn't inlined, and use OdrDerived in an optimized context.
	* testsuite/odr_header1.h: Defines OdrDerived, where
	optimization will change the
	first-instruction-in-the-destructor's file and line number.
	* testsuite/odr_header2.h: Defines OdrBase.

1 files changed, 18 insertions, 12 deletions

diff --git a/gold/testsuite/debug_msg.sh b/gold/testsuite/debug_msg.sh
index 74b4b05cde9..b8624e70e09 100755
--- a/gold/testsuite/debug_msg.sh
+++ b/gold/testsuite/debug_msg.sh
@@ -73,18 +73,22 @@ check debug_msg.err "debug_msg.o: in function int testfn<double>(double):.*/debu
 
 # Check we detected the ODR (One Definition Rule) violation.
 check debug_msg.err ": symbol 'Ordering::operator()(int, int)' defined in multiple places (possible ODR violation):"
-check debug_msg.err "odr_violation1.cc:5"
-check debug_msg.err "odr_violation2.cc:5"
+check debug_msg.err "odr_violation1.cc:6"
+check debug_msg.err "odr_violation2.cc:9"
+
+# Check we don't have ODR false positives:
+check_missing debug_msg.err "OdrDerived::~OdrDerived()"
+check_missing debug_msg.err "__adjust_heap"
 # We block ODR detection for combinations of C weak and strong
 # symbols, to allow people to use the linker to override things.  We
 # still flag it for C++ symbols since those are more likely to be
 # unintentional.
 check_missing debug_msg.err ": symbol 'OverriddenCFunction' defined in multiple places (possible ODR violation):"
-check_missing debug_msg.err "odr_violation1.cc:15"
-check_missing debug_msg.err "odr_violation2.cc:17"
+check_missing debug_msg.err "odr_violation1.cc:16"
+check_missing debug_msg.err "odr_violation2.cc:20"
 check debug_msg.err ": symbol 'SometimesInlineFunction(int)' defined in multiple places (possible ODR violation):"
-check debug_msg.err "debug_msg.cc:64"
-check debug_msg.err "odr_violation2.cc:21"
+check debug_msg.err "debug_msg.cc:68"
+check debug_msg.err "odr_violation2.cc:24"
 
 # When linking together .so's, we don't catch the line numbers, but we
 # still find all the undefined variables, and the ODR violation.
@@ -92,14 +96,16 @@ check debug_msg_so.err "debug_msg.so: error: undefined reference to 'undef_fn1()
 check debug_msg_so.err "debug_msg.so: error: undefined reference to 'undef_fn2()'"
 check debug_msg_so.err "debug_msg.so: error: undefined reference to 'undef_int'"
 check debug_msg_so.err ": symbol 'Ordering::operator()(int, int)' defined in multiple places (possible ODR violation):"
-check debug_msg_so.err "odr_violation1.cc:5"
-check debug_msg_so.err "odr_violation2.cc:5"
+check debug_msg_so.err "odr_violation1.cc:6"
+check debug_msg_so.err "odr_violation2.cc:9"
+check_missing debug_msg.err "OdrDerived::~OdrDerived()"
+check_missing debug_msg.err "__adjust_heap"
 check_missing debug_msg.err ": symbol 'OverriddenCFunction' defined in multiple places (possible ODR violation):"
-check_missing debug_msg.err "odr_violation1.cc:15"
-check_missing debug_msg.err "odr_violation2.cc:17"
+check_missing debug_msg.err "odr_violation1.cc:16"
+check_missing debug_msg.err "odr_violation2.cc:20"
 check debug_msg.err ": symbol 'SometimesInlineFunction(int)' defined in multiple places (possible ODR violation):"
-check debug_msg.err "debug_msg.cc:64"
-check debug_msg.err "odr_violation2.cc:21"
+check debug_msg.err "debug_msg.cc:68"
+check debug_msg.err "odr_violation2.cc:24"
 
 # These messages shouldn't need any debug info to detect:
 check debug_msg_ndebug.err "debug_msg_ndebug.so: error: undefined reference to 'undef_fn1()'"