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| author | Mark Wielaard <mjw@redhat.com> | 2014-11-26 10:10:27 +0000 |
|---|---|---|
| committer | Mark Wielaard <mark@gcc.gnu.org> | 2014-11-26 10:10:27 +0000 |
| commit | 42bc3520017ef04b19bee9a6ae4fc35d55cd2537 (patch) | |
| tree | 0da2d62552111f8cf417b00f86b89e8a9353c9cb /gcc/dwarf2out.c | |
| parent | 7ec44c3d10c41dabcb64efc4b3225d5a1bb4d7f9 (diff) | |
| download | gcc-42bc3520017ef04b19bee9a6ae4fc35d55cd2537.zip gcc-42bc3520017ef04b19bee9a6ae4fc35d55cd2537.tar.gz gcc-42bc3520017ef04b19bee9a6ae4fc35d55cd2537.tar.bz2 | |
DWARF add DW_AT_noreturn on noreturn function subprogram.
This implements the DWARFv5 noreturn proposal:
http://dwarfstd.org/ShowIssue.php?issue=140331.1
TREE_THIS_VOLATILE on a FUNCTION_DECL node means the function does not
return normally. This catches the traditional noreturn GNU attribute,
the C11 _Noreturn keyword and the C++11 [[noreturn]] attribute.
This relies on the DW_AT_noreturn constant defined in the DWARFv5 DRAFT:
http://www.dwarfstd.org/doc/dwarf5.20141029.pdf
gcc/ChangeLog
* dwarf2out.c (gen_subprogram_die): Add DW_AT_noreturn when the
function decl has TREE_THIS_VOLATILE.
gcc/testsuite/ChangeLog
* g++.dg/debug/dwarf2/noreturn-function.C: New test.
* gcc.dg/debug/dwarf2/noreturn-function-attribute.c: Likewise.
* gcc.dg/debug/dwarf2/noreturn-function-keyword.c: Likewise.
include/ChangeLog
* dwarf2.def (DW_AT_noreturn): New DWARF5 attribute.
From-SVN: r218075
Diffstat (limited to 'gcc/dwarf2out.c')
| -rw-r--r-- | gcc/dwarf2out.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index 3d50ac9..25307d2 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -18336,6 +18336,9 @@ gen_subprogram_die (tree decl, dw_die_ref context_die) if (DECL_ARTIFICIAL (decl)) add_AT_flag (subr_die, DW_AT_artificial, 1); + if (TREE_THIS_VOLATILE (decl) && (dwarf_version >= 5 || !dwarf_strict)) + add_AT_flag (subr_die, DW_AT_noreturn, 1); + add_accessibility_attribute (subr_die, decl); } |