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| author | Nick Alcock <nick.alcock@oracle.com> | 2020-06-05 23:18:06 +0100 |
|---|---|---|
| committer | Nick Alcock <nick.alcock@oracle.com> | 2020-07-22 18:03:57 +0100 |
| commit | 5dba6f05b7ba3d0e1c99da54592815564c782b39 (patch) | |
| tree | 61183e2ed21e7b52a7f8540a844f2208cb6e28b9 /ld/ChangeLog | |
| parent | f320bba50ff0aab7ce342ab9e3d25f49fc45d468 (diff) | |
| download | gdb-5dba6f05b7ba3d0e1c99da54592815564c782b39.zip gdb-5dba6f05b7ba3d0e1c99da54592815564c782b39.tar.gz gdb-5dba6f05b7ba3d0e1c99da54592815564c782b39.tar.bz2 | |
ld: new options --ctf-variables and --ctf-share-types
libctf recently changed to make it possible to not emit the CTF
variables section. Make this the default for ld: the variables section
is a simple name -> type mapping, and the names can be quite voluminous.
Nothing in the variables section appears in the symbol table, by
definition, so GDB cannot make use of them: special-purpose projects
that implement their own analogues of symbol table lookup can do so, but
they'll need to tell the linker to emit the variables section after all.
The new --ctf-variables option does this.
The --ctf-share-types option (valid values "share-duplicated" and
"share-unconflicted") allow the caller to specify the CTF link mode.
Most users will want share-duplicated, since it allows for more
convenient debugging: but very large projects composed of many decoupled
components may want to use share-unconflicted mode, which places types
that appear in only one TU into per-TU dicts. (They may also want to
relink the CTF using the ctf_link API and cu-mapping, to make their
"components" larger than a single TU. Right now the linker does not
expose the CU-mapping machinery. Perhaps it should in future to make
this use case easier.)
For now, giving the linker the ability to emit share-duplicated CTF lets
us add testcases for that mode to the testsuite.
ld/
* ldlex.h (option_values) <OPTION_CTF_VARIABLES,
OPTION_NO_CTF_VARIABLES, OPTION_CTF_SHARE_TYPES>: New.
* ld.h (ld_config_type) <ctf_variables, ctf_share_duplicated>:
New fields.
* ldlang.c (lang_merge_ctf): Use them.
* lexsup.c (ld_options): Add ctf-variables, no-ctf-variables,
ctf-share-types.
(parse_args) <OPTION_CTF_VARIABLES, OPTION_NO_CTF_VARIABLES,
OPTION_CTF_SHARE_TYPES>: New cases.
* ld.texi: Document new options.
* NEWS: Likewise.
Diffstat (limited to 'ld/ChangeLog')
| -rw-r--r-- | ld/ChangeLog | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog index 02ce249..b45da76 100644 --- a/ld/ChangeLog +++ b/ld/ChangeLog @@ -1,3 +1,17 @@ +2020-07-22 Nick Alcock <nick.alcock@oracle.com> + + * ldlex.h (option_values) <OPTION_CTF_VARIABLES, + OPTION_NO_CTF_VARIABLES, OPTION_CTF_SHARE_TYPES>: New. + * ld.h (ld_config_type) <ctf_variables, ctf_share_duplicated>: + New fields. + * ldlang.c (lang_merge_ctf): Use them. + * lexsup.c (ld_options): Add ctf-variables, no-ctf-variables, + ctf-share-types. + (parse_args) <OPTION_CTF_VARIABLES, OPTION_NO_CTF_VARIABLES, + OPTION_CTF_SHARE_TYPES>: New cases. + * ld.texi: Document new options. + * NEWS: Likewise. + 2020-07-22 Egeyar Bagcioglu <egeyar.bagcioglu@oracle.com> * ldlang.c (lang_merge_ctf): Turn errors into warnings. |