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libdw: Add support for DWARF5/GCC5 DW_TAG_atomic_type.

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GCC5 adds support for the new C11 _Atomic DWARF5 DW_TAG_atomic_type
qualifier. Add it to dwarf.h and handle it in dwarf_peel_type.

http://dwarfstd.org/ShowIssue.php?issue=131112.1

Also documented at https://fedorahosted.org/elfutils/wiki/DwarfExtensions

Signed-off-by: Mark Wielaard <mjw@redhat.com>
This commit is contained in:
Mark Wielaard
2015-02-09 16:24:04 +01:00
parent 3d11410c48
commit 7fb8031aed
4 changed files with 13 additions and 2 deletions
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libdw/ChangeLog
+6
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@@ -1,3 +1,9 @@
2015-02-09 Mark Wielaard <mjw@redhat.com>
* dwarf.h: Add DW_TAG_atomic_type.
* libdw.h (dwarf_peel_type): Document DW_TAG_atomic_type.
* dwarf_peel_type.c (dwarf_peel_type): Handle DW_TAG_atomic_type.
2015-02-11 Josh Stone <jistone@redhat.com>
* encoded-value.h (read_encoded_value): Initialize value.
libdw/dwarf.h
+3
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@@ -94,6 +94,9 @@ enum
DW_TAG_rvalue_reference_type = 0x42,
DW_TAG_template_alias = 0x43,
/* DWARF 5. */
DW_TAG_atomic_type = 0x47,
DW_TAG_lo_user = 0x4080,
DW_TAG_MIPS_loop = 0x4081,
libdw/dwarf_peel_type.c
+2 -1
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@@ -51,7 +51,8 @@ dwarf_peel_type (die, result)
while (tag == DW_TAG_typedef
|| tag == DW_TAG_const_type
|| tag == DW_TAG_volatile_type
|| tag == DW_TAG_restrict_type)
|| tag == DW_TAG_restrict_type
|| tag == DW_TAG_atomic_type)
{
Dwarf_Attribute attr_mem;
Dwarf_Attribute *attr = INTUSE (dwarf_attr_integrate) (die, DW_AT_type,
libdw/libdw.h
+2 -1
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@@ -409,7 +409,8 @@ extern int dwarf_siblingof (Dwarf_Die *die, Dwarf_Die *result)
The current DWARF specification defines one type alias tag
(DW_TAG_typedef) and three qualifier type tags (DW_TAG_const_type,
DW_TAG_volatile_type, DW_TAG_restrict_type). A future version of
DW_TAG_volatile_type, DW_TAG_restrict_type). DWARF5 defines one
other qualifier type tag (DW_TAG_atomic_type). A future version of
this function might peel other alias or qualifier type tags if a
future DWARF version or GNU extension defines other type aliases or
qualifier type tags that don't modify or change the structural