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libctf, link: add lazy linking: clean up input members: err/warn cleanup

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This rather large and intertwined pile of changes does three things:

First, it transitions from dprintf to ctf_err_warn for things the user might
care about: this one file is the major impetus for the ctf_err_warn
infrastructure, because things like file names are crucial in linker
error messages, and errno values are utterly incapable of
communicating them

Second, it stabilizes the ctf_link APIs: you can now call
ctf_link_add_ctf without a CTF argument (only a NAME), to lazily
ctf_open the file with the given NAME when needed, and close it as soon
as possible, to save memory.  This is not an API change because a null
CTF argument was prohibited before now.

Since getting CTF directly from files uses ctf_open, passing in only a
NAME requires use of libctf, not libctf-nobfd.  The linker's behaviour
is unchanged, as it still passes in a ctf_archive_t as before.

This also let us fix a leak: we were opening ctf_archives and their
containing ctf_files, then only closing the files and leaving the
archives open.

Third, this commit restructures the ctf_link_in_member argument used by
the CTF linking machinery and adjusts its users accordingly.

We drop two members:

- arcname, which is difficult to construct and then only used in error
  messages (that were only dprintf()ed, so never seen!)
- share_mode, since we store the flags passed to ctf_link (including the
  share mode) in a new ctf_file_t.ctf_link_flags to help dedup get hold
  of it

We rename others whose existing names were fairly dreadful:

- done_main_member -> done_parent, using consistent terminology for .ctf
  as the parent of all archive members
- main_input_fp -> in_fp_parent, likewise
- file_name -> in_file_name, likewise

We add one new member, cu_mapped.

Finally, we move the various frees of things like mapping table data to
the top-level ctf_link, since deduplicating links will want to do that
too.

include/
	* ctf-api.h (ECTF_NEEDSBFD): New.
	(ECTF_NERR): Adjust.
	(ctf_link): Rename share_mode arg to flags.
libctf/
	* Makefile.am: Set -DNOBFD=1 in libctf-nobfd, and =0 elsewhere.
	* Makefile.in: Regenerated.
	* ctf-impl.h (ctf_link_input_name): New.
	(ctf_file_t) <ctf_link_flags>: New.
	* ctf-create.c (ctf_serialize): Adjust accordingly.
	* ctf-link.c: Define ctf_open as weak when PIC.
	(ctf_arc_close_thunk): Remove unnecessary thunk.
	(ctf_file_close_thunk): Likewise.
	(ctf_link_input_name): New.
	(ctf_link_input_t): New value of the ctf_file_t.ctf_link_input.
	(ctf_link_input_close): Adjust accordingly.
	(ctf_link_add_ctf_internal): New, split from...
	(ctf_link_add_ctf): ... here.  Return error if lazy loading of
	CTF is not possible.  Change to just call...
	(ctf_link_add): ... this new function.
	(ctf_link_add_cu_mapping): Transition to ctf_err_warn.  Drop the
	ctf_file_close_thunk.
	(ctf_link_in_member_cb_arg_t) <file_name> Rename to...
	<in_file_name>: ... this.
	<arcname>: Drop.
	<share_mode>: Likewise (migrated to ctf_link_flags).
	<done_main_member>: Rename to...
	<done_parent>: ... this.
	<main_input_fp>: Rename to...
	<in_fp_parent>: ... this.
	<cu_mapped>: New.
	(ctf_link_one_type): Adjuwt accordingly.  Transition to
	ctf_err_warn, removing a TODO.
	(ctf_link_one_variable): Note a case too common to warn about.
	Report in the debug stream if a cu-mapped link prevents addition
	of a conflicting variable.
	(ctf_link_one_input_archive_member): Adjust.
	(ctf_link_lazy_open): New, open a CTF archive for linking when
	needed.
	(ctf_link_close_one_input_archive): New, close it again.
	(ctf_link_one_input_archive): Adjust for lazy opening, member
	renames, and ctf_err_warn transition.  Move the
	empty_link_type_mapping call to...
	(ctf_link): ... here.  Adjut for renamings and thunk removal.
	Don't spuriously fail if some input contains no CTF data.
	(ctf_link_write): ctf_err_warn transition.
	* libctf.ver: Remove not-yet-stable comment.
This commit is contained in:
Nick Alcock
2020-06-04 19:28:52 +01:00
parent e148b73013
commit 8d2229ad1e
9 changed files with 611 additions and 133 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/ChangeLog
View File

@ -1,3 +1,9 @@
2020-07-22 Nick Alcock <nick.alcock@oracle.com>
* ctf-api.h (ECTF_NEEDSBFD): New.
(ECTF_NERR): Adjust.
(ctf_link): Rename share_mode arg to flags.
2020-07-22 Nick Alcock <nick.alcock@oracle.com> 2020-07-22 Nick Alcock <nick.alcock@oracle.com>
* ctf-api.h (ECTF_INTERNAL): Adjust error text. * ctf-api.h (ECTF_INTERNAL): Adjust error text.

9
include/ctf-api.h
View File

@ -208,10 +208,11 @@ enum
ECTF_NEXT_END, /* End of iteration. */ ECTF_NEXT_END, /* End of iteration. */
ECTF_NEXT_WRONGFUN, /* Wrong iteration function called. */ ECTF_NEXT_WRONGFUN, /* Wrong iteration function called. */
ECTF_NEXT_WRONGFP, /* Iteration entity changed in mid-iterate. */ ECTF_NEXT_WRONGFP, /* Iteration entity changed in mid-iterate. */
ECTF_FLAGS /* CTF header contains flags unknown to libctf. */ ECTF_FLAGS, /* CTF header contains flags unknown to libctf. */
ECTF_NEEDSBFD /* This feature needs a libctf with BFD support. */
}; };
#define ECTF_NERR (ECTF_FLAGS - ECTF_BASE + 1) /* Count of CTF errors. */ #define ECTF_NERR (ECTF_NEEDSBFD - ECTF_BASE + 1) /* Count of CTF errors. */
/* The CTF data model is inferred to be the caller's data model or the data /* The CTF data model is inferred to be the caller's data model or the data
model of the given object, unless ctf_setmodel() is explicitly called. */ model of the given object, unless ctf_setmodel() is explicitly called. */
@ -452,10 +453,8 @@ extern int ctf_gzwrite (ctf_file_t *fp, gzFile fd);
extern int ctf_compress_write (ctf_file_t * fp, int fd); extern int ctf_compress_write (ctf_file_t * fp, int fd);
extern unsigned char *ctf_write_mem (ctf_file_t *, size_t *, size_t threshold); extern unsigned char *ctf_write_mem (ctf_file_t *, size_t *, size_t threshold);
/* The ctf_link interfaces are not stable yet. No guarantees! */
extern int ctf_link_add_ctf (ctf_file_t *, ctf_archive_t *, const char *); extern int ctf_link_add_ctf (ctf_file_t *, ctf_archive_t *, const char *);
extern int ctf_link (ctf_file_t *, int share_mode); extern int ctf_link (ctf_file_t *, int flags);
typedef const char *ctf_link_strtab_string_f (uint32_t *offset, void *arg); typedef const char *ctf_link_strtab_string_f (uint32_t *offset, void *arg);
extern int ctf_link_add_strtab (ctf_file_t *, ctf_link_strtab_string_f *, extern int ctf_link_add_strtab (ctf_file_t *, ctf_link_strtab_string_f *,
void *); void *);

45
libctf/ChangeLog
View File

@ -1,3 +1,48 @@
2020-07-22 Nick Alcock <nick.alcock@oracle.com>
* Makefile.am: Set -DNOBFD=1 in libctf-nobfd, and =0 elsewhere.
* Makefile.in: Regenerated.
* ctf-impl.h (ctf_link_input_name): New.
(ctf_file_t) <ctf_link_flags>: New.
* ctf-create.c (ctf_serialize): Adjust accordingly.
* ctf-link.c: Define ctf_open as weak when PIC.
(ctf_arc_close_thunk): Remove unnecessary thunk.
(ctf_file_close_thunk): Likewise.
(ctf_link_input_name): New.
(ctf_link_input_t): New value of the ctf_file_t.ctf_link_input.
(ctf_link_input_close): Adjust accordingly.
(ctf_link_add_ctf_internal): New, split from...
(ctf_link_add_ctf): ... here. Return error if lazy loading of
CTF is not possible. Change to just call...
(ctf_link_add): ... this new function.
(ctf_link_add_cu_mapping): Transition to ctf_err_warn. Drop the
ctf_file_close_thunk.
(ctf_link_in_member_cb_arg_t) <file_name> Rename to...
<in_file_name>: ... this.
<arcname>: Drop.
<share_mode>: Likewise (migrated to ctf_link_flags).
<done_main_member>: Rename to...
<done_parent>: ... this.
<main_input_fp>: Rename to...
<in_fp_parent>: ... this.
<cu_mapped>: New.
(ctf_link_one_type): Adjuwt accordingly. Transition to
ctf_err_warn, removing a TODO.
(ctf_link_one_variable): Note a case too common to warn about.
Report in the debug stream if a cu-mapped link prevents addition
of a conflicting variable.
(ctf_link_one_input_archive_member): Adjust.
(ctf_link_lazy_open): New, open a CTF archive for linking when
needed.
(ctf_link_close_one_input_archive): New, close it again.
(ctf_link_one_input_archive): Adjust for lazy opening, member
renames, and ctf_err_warn transition. Move the
empty_link_type_mapping call to...
(ctf_link): ... here. Adjut for renamings and thunk removal.
Don't spuriously fail if some input contains no CTF data.
(ctf_link_write): ctf_err_warn transition.
* libctf.ver: Remove not-yet-stable comment.
2020-07-22 Nick Alcock <nick.alcock@oracle.com> 2020-07-22 Nick Alcock <nick.alcock@oracle.com>
* ctf-impl.h (ctf_strerror): Delete. * ctf-impl.h (ctf_strerror): Delete.

2
libctf/Makefile.am
View File

@ -41,6 +41,7 @@ endif
libctf_nobfd_la_LIBADD = @SHARED_LIBADD@ $(ZLIB) libctf_nobfd_la_LIBADD = @SHARED_LIBADD@ $(ZLIB)
libctf_nobfd_la_LDFLAGS = -version-info 0:0:0 @SHARED_LDFLAGS@ @VERSION_FLAGS@ libctf_nobfd_la_LDFLAGS = -version-info 0:0:0 @SHARED_LDFLAGS@ @VERSION_FLAGS@
libctf_nobfd_la_CPPFLAGS = $(AM_CPPFLAGS) -DNOBFD=1
libctf_nobfd_la_SOURCES = ctf-archive.c ctf-dump.c ctf-create.c ctf-decl.c ctf-error.c \ libctf_nobfd_la_SOURCES = ctf-archive.c ctf-dump.c ctf-create.c ctf-decl.c ctf-error.c \
ctf-hash.c ctf-labels.c ctf-link.c ctf-lookup.c ctf-open.c \ ctf-hash.c ctf-labels.c ctf-link.c ctf-lookup.c ctf-open.c \
ctf-string.c ctf-subr.c ctf-types.c ctf-util.c ctf-string.c ctf-subr.c ctf-types.c ctf-util.c
@ -49,6 +50,7 @@ libctf_nobfd_la_SOURCES += ctf-qsort_r.c
endif endif
libctf_la_LIBADD = @BFD_LIBADD@ $(libctf_nobfd_la_LIBADD) libctf_la_LIBADD = @BFD_LIBADD@ $(libctf_nobfd_la_LIBADD)
libctf_la_CPPFLAGS = $(AM_CPPFLAGS) -DNOBFD=0
libctf_la_DEPENDENCIES = @BFD_DEPENDENCIES@ libctf_la_DEPENDENCIES = @BFD_DEPENDENCIES@
libctf_la_LDFLAGS = $(libctf_nobfd_la_LDFLAGS) libctf_la_LDFLAGS = $(libctf_nobfd_la_LDFLAGS)
libctf_la_SOURCES = $(libctf_nobfd_la_SOURCES) ctf-open-bfd.c libctf_la_SOURCES = $(libctf_nobfd_la_SOURCES) ctf-open-bfd.c

294
libctf/Makefile.in
View File

@ -167,11 +167,15 @@ am__libctf_nobfd_la_SOURCES_DIST = ctf-archive.c ctf-dump.c \
ctf-create.c ctf-decl.c ctf-error.c ctf-hash.c ctf-labels.c \ ctf-create.c ctf-decl.c ctf-error.c ctf-hash.c ctf-labels.c \
ctf-link.c ctf-lookup.c ctf-open.c ctf-string.c ctf-subr.c \ ctf-link.c ctf-lookup.c ctf-open.c ctf-string.c ctf-subr.c \
ctf-types.c ctf-util.c ctf-qsort_r.c ctf-types.c ctf-util.c ctf-qsort_r.c
@NEED_CTF_QSORT_R_TRUE@am__objects_1 = ctf-qsort_r.lo @NEED_CTF_QSORT_R_TRUE@am__objects_1 = libctf_nobfd_la-ctf-qsort_r.lo
am_libctf_nobfd_la_OBJECTS = ctf-archive.lo ctf-dump.lo ctf-create.lo \ am_libctf_nobfd_la_OBJECTS = libctf_nobfd_la-ctf-archive.lo \
ctf-decl.lo ctf-error.lo ctf-hash.lo ctf-labels.lo ctf-link.lo \ libctf_nobfd_la-ctf-dump.lo libctf_nobfd_la-ctf-create.lo \
ctf-lookup.lo ctf-open.lo ctf-string.lo ctf-subr.lo \ libctf_nobfd_la-ctf-decl.lo libctf_nobfd_la-ctf-error.lo \
ctf-types.lo ctf-util.lo $(am__objects_1) libctf_nobfd_la-ctf-hash.lo libctf_nobfd_la-ctf-labels.lo \
libctf_nobfd_la-ctf-link.lo libctf_nobfd_la-ctf-lookup.lo \
libctf_nobfd_la-ctf-open.lo libctf_nobfd_la-ctf-string.lo \
libctf_nobfd_la-ctf-subr.lo libctf_nobfd_la-ctf-types.lo \
libctf_nobfd_la-ctf-util.lo $(am__objects_1)
libctf_nobfd_la_OBJECTS = $(am_libctf_nobfd_la_OBJECTS) libctf_nobfd_la_OBJECTS = $(am_libctf_nobfd_la_OBJECTS)
AM_V_lt = $(am__v_lt_@AM_V@) AM_V_lt = $(am__v_lt_@AM_V@)
am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@) am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
@ -188,11 +192,15 @@ am__libctf_la_SOURCES_DIST = ctf-archive.c ctf-dump.c ctf-create.c \
ctf-decl.c ctf-error.c ctf-hash.c ctf-labels.c ctf-link.c \ ctf-decl.c ctf-error.c ctf-hash.c ctf-labels.c ctf-link.c \
ctf-lookup.c ctf-open.c ctf-string.c ctf-subr.c ctf-types.c \ ctf-lookup.c ctf-open.c ctf-string.c ctf-subr.c ctf-types.c \
ctf-util.c ctf-qsort_r.c ctf-open-bfd.c ctf-util.c ctf-qsort_r.c ctf-open-bfd.c
am__objects_2 = ctf-archive.lo ctf-dump.lo ctf-create.lo ctf-decl.lo \ @NEED_CTF_QSORT_R_TRUE@am__objects_2 = libctf_la-ctf-qsort_r.lo
ctf-error.lo ctf-hash.lo ctf-labels.lo ctf-link.lo \ am__objects_3 = libctf_la-ctf-archive.lo libctf_la-ctf-dump.lo \
ctf-lookup.lo ctf-open.lo ctf-string.lo ctf-subr.lo \ libctf_la-ctf-create.lo libctf_la-ctf-decl.lo \
ctf-types.lo ctf-util.lo $(am__objects_1) libctf_la-ctf-error.lo libctf_la-ctf-hash.lo \
am_libctf_la_OBJECTS = $(am__objects_2) ctf-open-bfd.lo libctf_la-ctf-labels.lo libctf_la-ctf-link.lo \
libctf_la-ctf-lookup.lo libctf_la-ctf-open.lo \
libctf_la-ctf-string.lo libctf_la-ctf-subr.lo \
libctf_la-ctf-types.lo libctf_la-ctf-util.lo $(am__objects_2)
am_libctf_la_OBJECTS = $(am__objects_3) libctf_la-ctf-open-bfd.lo
libctf_la_OBJECTS = $(am_libctf_la_OBJECTS) libctf_la_OBJECTS = $(am_libctf_la_OBJECTS)
libctf_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \ libctf_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \ $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
@ -444,11 +452,13 @@ AM_CFLAGS = -std=gnu99 @ac_libctf_warn_cflags@ @warn@ @c_warn@ @WARN_PEDANTIC@ @
@INSTALL_LIBBFD_FALSE@noinst_LTLIBRARIES = libctf.la libctf-nobfd.la @INSTALL_LIBBFD_FALSE@noinst_LTLIBRARIES = libctf.la libctf-nobfd.la
libctf_nobfd_la_LIBADD = @SHARED_LIBADD@ $(ZLIB) libctf_nobfd_la_LIBADD = @SHARED_LIBADD@ $(ZLIB)
libctf_nobfd_la_LDFLAGS = -version-info 0:0:0 @SHARED_LDFLAGS@ @VERSION_FLAGS@ libctf_nobfd_la_LDFLAGS = -version-info 0:0:0 @SHARED_LDFLAGS@ @VERSION_FLAGS@
libctf_nobfd_la_CPPFLAGS = $(AM_CPPFLAGS) -DNOBFD=1
libctf_nobfd_la_SOURCES = ctf-archive.c ctf-dump.c ctf-create.c \ libctf_nobfd_la_SOURCES = ctf-archive.c ctf-dump.c ctf-create.c \
ctf-decl.c ctf-error.c ctf-hash.c ctf-labels.c ctf-link.c \ ctf-decl.c ctf-error.c ctf-hash.c ctf-labels.c ctf-link.c \
ctf-lookup.c ctf-open.c ctf-string.c ctf-subr.c ctf-types.c \ ctf-lookup.c ctf-open.c ctf-string.c ctf-subr.c ctf-types.c \
ctf-util.c $(am__append_1) ctf-util.c $(am__append_1)
libctf_la_LIBADD = @BFD_LIBADD@ $(libctf_nobfd_la_LIBADD) libctf_la_LIBADD = @BFD_LIBADD@ $(libctf_nobfd_la_LIBADD)
libctf_la_CPPFLAGS = $(AM_CPPFLAGS) -DNOBFD=0
libctf_la_DEPENDENCIES = @BFD_DEPENDENCIES@ libctf_la_DEPENDENCIES = @BFD_DEPENDENCIES@
libctf_la_LDFLAGS = $(libctf_nobfd_la_LDFLAGS) libctf_la_LDFLAGS = $(libctf_nobfd_la_LDFLAGS)
libctf_la_SOURCES = $(libctf_nobfd_la_SOURCES) ctf-open-bfd.c libctf_la_SOURCES = $(libctf_nobfd_la_SOURCES) ctf-open-bfd.c
@ -565,22 +575,37 @@ mostlyclean-compile:
distclean-compile: distclean-compile:
-rm -f *.tab.c -rm -f *.tab.c
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-archive.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-archive.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-create.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-create.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-decl.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-decl.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-dump.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-dump.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-error.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-error.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-hash.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-hash.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-labels.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-labels.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-link.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-link.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-lookup.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-lookup.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-open-bfd.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-open-bfd.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-open.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-open.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-qsort_r.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-qsort_r.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-string.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-string.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-subr.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-subr.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-types.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-types.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ctf-util.Plo@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_la-ctf-util.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-archive.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-create.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-decl.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-dump.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-error.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-hash.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-labels.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-link.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-lookup.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-open.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-qsort_r.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-string.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-subr.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-types.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libctf_nobfd_la-ctf-util.Plo@am__quote@
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@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='ctf-open-bfd.c' object='libctf_la-ctf-open-bfd.lo' libtool=yes @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libctf_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libctf_la-ctf-open-bfd.lo `test -f 'ctf-open-bfd.c' || echo '$(srcdir)/'`ctf-open-bfd.c
mostlyclean-libtool: mostlyclean-libtool:
-rm -f *.lo -rm -f *.lo

1
libctf/ctf-create.c
View File

@ -542,6 +542,7 @@ ctf_serialize (ctf_file_t *fp)
nfp->ctf_link_type_mapping = fp->ctf_link_type_mapping; nfp->ctf_link_type_mapping = fp->ctf_link_type_mapping;
nfp->ctf_link_memb_name_changer = fp->ctf_link_memb_name_changer; nfp->ctf_link_memb_name_changer = fp->ctf_link_memb_name_changer;
nfp->ctf_link_memb_name_changer_arg = fp->ctf_link_memb_name_changer_arg; nfp->ctf_link_memb_name_changer_arg = fp->ctf_link_memb_name_changer_arg;
nfp->ctf_link_flags = fp->ctf_link_flags;
nfp->ctf_snapshot_lu = fp->ctf_snapshots; nfp->ctf_snapshot_lu = fp->ctf_snapshots;

4
libctf/ctf-impl.h
View File

@ -314,6 +314,9 @@ struct ctf_file
ctf_dynhash_t *ctf_link_type_mapping; /* Map input types to output types. */ ctf_dynhash_t *ctf_link_type_mapping; /* Map input types to output types. */
ctf_dynhash_t *ctf_link_cu_mapping; /* Map CU names to CTF dict names. */ ctf_dynhash_t *ctf_link_cu_mapping; /* Map CU names to CTF dict names. */
/* Allow the caller to Change the name of link archive members. */ /* Allow the caller to Change the name of link archive members. */
/* CTF linker flags. */
int ctf_link_flags;
ctf_link_memb_name_changer_f *ctf_link_memb_name_changer; ctf_link_memb_name_changer_f *ctf_link_memb_name_changer;
void *ctf_link_memb_name_changer_arg; /* Argument for it. */ void *ctf_link_memb_name_changer_arg; /* Argument for it. */
ctf_dynhash_t *ctf_add_processing; /* Types ctf_add_type is working on now. */ ctf_dynhash_t *ctf_add_processing; /* Types ctf_add_type is working on now. */
@ -560,6 +563,7 @@ _libctf_printflike_ (3, 4)
extern void ctf_err_warn (ctf_file_t *, int is_warning, const char *, ...); extern void ctf_err_warn (ctf_file_t *, int is_warning, const char *, ...);
extern void ctf_assert_fail_internal (ctf_file_t *, const char *, extern void ctf_assert_fail_internal (ctf_file_t *, const char *,
size_t, const char *); size_t, const char *);
extern const char *ctf_link_input_name (ctf_file_t *);
extern Elf64_Sym *ctf_sym_to_elf64 (const Elf32_Sym *src, Elf64_Sym *dst); extern Elf64_Sym *ctf_sym_to_elf64 (const Elf32_Sym *src, Elf64_Sym *dst);
extern const char *ctf_lookup_symbol_name (ctf_file_t *fp, unsigned long symidx); extern const char *ctf_lookup_symbol_name (ctf_file_t *fp, unsigned long symidx);

381
libctf/ctf-link.c
View File

@ -20,6 +20,10 @@
#include <ctf-impl.h> #include <ctf-impl.h>
#include <string.h> #include <string.h>
#if defined (PIC)
#pragma weak ctf_open
#endif
/* Type tracking machinery. */ /* Type tracking machinery. */
/* Record the correspondence between a source and ctf_add_type()-added /* Record the correspondence between a source and ctf_add_type()-added
@ -137,45 +141,143 @@ ctf_type_mapping (ctf_file_t *src_fp, ctf_id_t src_type, ctf_file_t **dst_fp)
(otherwise) and returns it, suitable for addition in the .ctf section of the (otherwise) and returns it, suitable for addition in the .ctf section of the
output. */ output. */
/* Add a file to a link. */ /* Return the name of the compilation unit this CTF dict or its parent applies
to, or a non-null string otherwise: prefer the parent. Used in debugging
static void ctf_arc_close_thunk (void *arc) output. Sometimes used for outputs too. */
const char *
ctf_link_input_name (ctf_file_t *fp)
{ {
ctf_arc_close ((ctf_archive_t *) arc); if (fp->ctf_parent && fp->ctf_parent->ctf_cuname)
return fp->ctf_parent->ctf_cuname;
else if (fp->ctf_cuname)
return fp->ctf_cuname;
else
return "(unnamed)";
} }
static void ctf_file_close_thunk (void *file) /* The linker inputs look like this. clin_fp is used for short-circuited
CU-mapped links that can entirely avoid the first link phase in some
situations in favour of just passing on the contained ctf_file_t: it is
always the sole ctf_file_t inside the corresponding clin_arc. If set, it
gets assigned directly to the final link inputs and freed from there, so it
never gets explicitly freed in the ctf_link_input. */
typedef struct ctf_link_input
{ {
ctf_file_close ((ctf_file_t *) file); const char *clin_filename;
ctf_archive_t *clin_arc;
ctf_file_t *clin_fp;
int n;
} ctf_link_input_t;
static void
ctf_link_input_close (void *input)
{
ctf_link_input_t *i = (ctf_link_input_t *) input;
if (i->clin_arc)
ctf_arc_close (i->clin_arc);
free (i);
} }
int /* Like ctf_link_add_ctf, below, but with no error-checking, so it can be called
ctf_link_add_ctf (ctf_file_t *fp, ctf_archive_t *ctf, const char *name) in the middle of an ongoing link. */
static int
ctf_link_add_ctf_internal (ctf_file_t *fp, ctf_archive_t *ctf,
ctf_file_t *fp_input, const char *name)
{ {
ctf_link_input_t *input = NULL;
char *dupname = NULL; char *dupname = NULL;
if ((input = calloc (1, sizeof (ctf_link_input_t))) == NULL)
goto oom;
if ((dupname = strdup (name)) == NULL)
goto oom;
input->clin_arc = ctf;
input->clin_fp = fp_input;
input->clin_filename = dupname;
input->n = ctf_dynhash_elements (fp->ctf_link_inputs);
if (ctf_dynhash_insert (fp->ctf_link_inputs, dupname, input) < 0)
goto oom;
return 0;
oom:
free (input);
free (dupname);
return ctf_set_errno (fp, ENOMEM);
}
/* Add a file, memory buffer, or unopened file (by name) to a link.
You can call this with:
CTF and NAME: link the passed ctf_archive_t, with the given NAME.
NAME alone: open NAME as a CTF file when needed.
BUF and NAME: open the BUF (of length N) as CTF, with the given NAME. (Not
yet implemented.)
Passed in CTF args are owned by the dictionary and will be freed by it.
The BUF arg is *not* owned by the dictionary, and the user should not free
its referent until the link is done.
The order of calls to this function influences the order of types in the
final link output, but otherwise is not important.
Private for now, but may in time become public once support for BUF is
implemented. */
static int
ctf_link_add (ctf_file_t *fp, ctf_archive_t *ctf, const char *name,
void *buf _libctf_unused_, size_t n _libctf_unused_)
{
if (buf)
return (ctf_set_errno (fp, ECTF_NOTYET));
if (!((ctf && name && !buf)
|| (name && !buf && !ctf)
|| (buf && name && !ctf)))
return (ctf_set_errno (fp, EINVAL));
/* We can only lazily open files if libctf.so is in use rather than
libctf-nobfd.so. This is a little tricky: in shared libraries, we can use
a weak symbol so that -lctf -lctf-nobfd works, but in static libraries we
must distinguish between the two libraries explicitly. */
#if defined (PIC)
if (!buf && !ctf && name && !ctf_open)
return (ctf_set_errno (fp, ECTF_NEEDSBFD));
#elif NOBFD
if (!buf && !ctf && name)
return (ctf_set_errno (fp, ECTF_NEEDSBFD));
#endif
if (fp->ctf_link_outputs) if (fp->ctf_link_outputs)
return (ctf_set_errno (fp, ECTF_LINKADDEDLATE)); return (ctf_set_errno (fp, ECTF_LINKADDEDLATE));
if (fp->ctf_link_inputs == NULL) if (fp->ctf_link_inputs == NULL)
fp->ctf_link_inputs = ctf_dynhash_create (ctf_hash_string, fp->ctf_link_inputs = ctf_dynhash_create (ctf_hash_string,
ctf_hash_eq_string, free, ctf_hash_eq_string, free,
ctf_arc_close_thunk); ctf_link_input_close);
if (fp->ctf_link_inputs == NULL) if (fp->ctf_link_inputs == NULL)
goto oom; return (ctf_set_errno (fp, ENOMEM));
if ((dupname = strdup (name)) == NULL) return ctf_link_add_ctf_internal (fp, ctf, NULL, name);
goto oom; }
if (ctf_dynhash_insert (fp->ctf_link_inputs, dupname, ctf) < 0) /* Add an opened CTF archive or unopened file (by name) to a link.
goto oom; If CTF is NULL and NAME is non-null, an unopened file is meant:
otherwise, the specified archive is assumed to have the given NAME.
return 0; Passed in CTF args are owned by the dictionary and will be freed by it.
oom:
free (fp->ctf_link_inputs); The order of calls to this function influences the order of types in the
fp->ctf_link_inputs = NULL; final link output, but otherwise is not important. */
free (dupname);
return (ctf_set_errno (fp, ENOMEM)); int
ctf_link_add_ctf (ctf_file_t *fp, ctf_archive_t *ctf, const char *name)
{
return ctf_link_add (fp, ctf, name, NULL, 0);
} }
/* Return a per-CU output CTF dictionary suitable for the given CU, creating and /* Return a per-CU output CTF dictionary suitable for the given CU, creating and
@ -210,9 +312,9 @@ ctf_create_per_cu (ctf_file_t *fp, const char *filename, const char *cuname)
if ((cu_fp = ctf_create (&err)) == NULL) if ((cu_fp = ctf_create (&err)) == NULL)
{ {
ctf_dprintf ("Cannot create per-CU CTF archive for CU %s from " ctf_err_warn (fp, 0, "Cannot create per-CU CTF archive for "
"input file %s: %s\n", cuname, filename, "CU %s from input file %s: %s", cuname, filename,
ctf_errmsg (err)); ctf_errmsg (err));
ctf_set_errno (fp, err); ctf_set_errno (fp, err);
return NULL; return NULL;
} }
@ -262,7 +364,8 @@ ctf_link_add_cu_mapping (ctf_file_t *fp, const char *from, const char *to)
if (fp->ctf_link_outputs == NULL) if (fp->ctf_link_outputs == NULL)
fp->ctf_link_outputs = ctf_dynhash_create (ctf_hash_string, fp->ctf_link_outputs = ctf_dynhash_create (ctf_hash_string,
ctf_hash_eq_string, free, ctf_hash_eq_string, free,
ctf_file_close_thunk); (ctf_hash_free_fun)
ctf_file_close);
if (fp->ctf_link_outputs == NULL) if (fp->ctf_link_outputs == NULL)
return ctf_set_errno (fp, ENOMEM); return ctf_set_errno (fp, ENOMEM);
@ -310,15 +413,27 @@ ctf_link_set_memb_name_changer (ctf_file_t *fp,
typedef struct ctf_link_in_member_cb_arg typedef struct ctf_link_in_member_cb_arg
{ {
/* The shared output dictionary. */
ctf_file_t *out_fp; ctf_file_t *out_fp;
const char *file_name;
/* The filename of the input file, and an fp to each dictionary in that file
in turn. */
const char *in_file_name;
ctf_file_t *in_fp; ctf_file_t *in_fp;
ctf_file_t *main_input_fp;
/* The CU name of the dict being processed. */
const char *cu_name; const char *cu_name;
char *arcname;
int done_main_member;
int share_mode;
int in_input_cu_file; int in_input_cu_file;
/* The parent dictionary in the input, and whether it's been processed yet.
Not needed by ctf_link_one_type / ctf_link_one_variable, only by higher
layers. */
ctf_file_t *in_fp_parent;
int done_parent;
/* If true, this is the CU-mapped portion of a deduplicating link: no child
dictionaries should be created. */
int cu_mapped;
} ctf_link_in_member_cb_arg_t; } ctf_link_in_member_cb_arg_t;
/* Link one type into the link. We rely on ctf_add_type() to detect /* Link one type into the link. We rely on ctf_add_type() to detect
@ -332,9 +447,9 @@ ctf_link_one_type (ctf_id_t type, int isroot _libctf_unused_, void *arg_)
ctf_file_t *per_cu_out_fp; ctf_file_t *per_cu_out_fp;
int err; int err;
if (arg->share_mode != CTF_LINK_SHARE_UNCONFLICTED) if (arg->in_fp->ctf_link_flags != CTF_LINK_SHARE_UNCONFLICTED)
{ {
ctf_dprintf ("Share-duplicated mode not yet implemented.\n"); ctf_err_warn (arg->out_fp, 0, "Share-duplicated mode not yet implemented");
return ctf_set_errno (arg->out_fp, ECTF_NOTYET); return ctf_set_errno (arg->out_fp, ECTF_NOTYET);
} }
@ -352,19 +467,18 @@ ctf_link_one_type (ctf_id_t type, int isroot _libctf_unused_, void *arg_)
if (err != ECTF_CONFLICT) if (err != ECTF_CONFLICT)
{ {
if (err != ECTF_NONREPRESENTABLE) if (err != ECTF_NONREPRESENTABLE)
ctf_dprintf ("Cannot link type %lx from archive member %s, input file %s " ctf_err_warn (arg->out_fp, 1, "Cannot link type %lx from input file %s, "
"into output link: %s\n", type, arg->arcname, arg->file_name, "CU %s into output link: %s", type, arg->cu_name,
ctf_errmsg (err)); arg->in_file_name, ctf_errmsg (err));
/* We must ignore this problem or we end up losing future types, then /* We must ignore this problem or we end up losing future types, then
trying to link the variables in, then exploding. Better to link as trying to link the variables in, then exploding. Better to link as
much as possible. XXX when we add a proper link warning much as possible. */
infrastructure, we should report the error here! */
return 0; return 0;
} }
ctf_set_errno (arg->out_fp, 0); ctf_set_errno (arg->out_fp, 0);
} }
if ((per_cu_out_fp = ctf_create_per_cu (arg->out_fp, arg->file_name, if ((per_cu_out_fp = ctf_create_per_cu (arg->out_fp, arg->in_file_name,
arg->cu_name)) == NULL) arg->cu_name)) == NULL)
return -1; /* Errno is set for us. */ return -1; /* Errno is set for us. */
@ -373,10 +487,10 @@ ctf_link_one_type (ctf_id_t type, int isroot _libctf_unused_, void *arg_)
err = ctf_errno (per_cu_out_fp); err = ctf_errno (per_cu_out_fp);
if (err != ECTF_NONREPRESENTABLE) if (err != ECTF_NONREPRESENTABLE)
ctf_dprintf ("Cannot link type %lx from CTF archive member %s, input file %s " ctf_err_warn (arg->out_fp, 1, "Cannot link type %lx from input file %s, CU %s "
"into output per-CU CTF archive member %s: %s: skipped\n", type, "into output per-CU CTF archive member %s: %s: skipped", type,
arg->arcname, arg->file_name, arg->arcname, ctf_link_input_name (arg->in_fp), arg->in_file_name,
ctf_errmsg (err)); ctf_link_input_name (per_cu_out_fp), ctf_errmsg (err));
if (err == ECTF_CONFLICT) if (err == ECTF_CONFLICT)
/* Conflicts are possible at this stage only if a non-ld user has combined /* Conflicts are possible at this stage only if a non-ld user has combined
multiple TUs into a single output dictionary. Even in this case we do not multiple TUs into a single output dictionary. Even in this case we do not
@ -402,8 +516,9 @@ check_variable (const char *name, ctf_file_t *fp, ctf_id_t type,
if (dvd->dvd_type != type) if (dvd->dvd_type != type)
{ {
/* Variable here. Wrong type: cannot add. Just skip it, because there is /* Variable here. Wrong type: cannot add. Just skip it, because there is
no way to express this in CTF. (This might be the parent, in which no way to express this in CTF. Don't even warn: this case is too
case we'll try adding in the child first, and only then give up.) */ common. (This might be the parent, in which case we'll try adding in
the child first, and only then give up.) */
ctf_dprintf ("Inexpressible duplicate variable %s skipped.\n", name); ctf_dprintf ("Inexpressible duplicate variable %s skipped.\n", name);
} }
@ -448,9 +563,18 @@ ctf_link_one_variable (const char *name, ctf_id_t type, void *arg_)
/* Can't add to the parent due to a name clash, or because it references a /* Can't add to the parent due to a name clash, or because it references a
type only present in the child. Try adding to the child, creating if need type only present in the child. Try adding to the child, creating if need
be. */ be. If we can't do that, skip it. Don't add to a child if we're doing a
CU-mapped link, since that has only one output. */
if ((per_cu_out_fp = ctf_create_per_cu (arg->out_fp, arg->file_name, if (arg->cu_mapped)
{
ctf_dprintf ("Variable %s in input file %s depends on a type %lx hidden "
"due to conflicts: skipped.\n", name, arg->in_file_name,
type);
return 0;
}
if ((per_cu_out_fp = ctf_create_per_cu (arg->out_fp, arg->in_file_name,
arg->cu_name)) == NULL) arg->cu_name)) == NULL)
return -1; /* Errno is set for us. */ return -1; /* Errno is set for us. */
@ -462,8 +586,9 @@ ctf_link_one_variable (const char *name, ctf_id_t type, void *arg_)
if (dst_type == 0) if (dst_type == 0)
{ {
ctf_dprintf ("Type %lx for variable %s in input file %s not " ctf_err_warn (arg->out_fp, 1, "Type %lx for variable %s in input "
"found: skipped.\n", type, name, arg->file_name); "file %s not found: skipped", type, name,
arg->in_file_name);
/* Do not terminate the link: just skip the variable. */ /* Do not terminate the link: just skip the variable. */
return 0; return 0;
} }
@ -475,11 +600,11 @@ ctf_link_one_variable (const char *name, ctf_id_t type, void *arg_)
return 0; return 0;
} }
/* Merge every type and variable in this archive member into the link, so we can /* Merge every type (and optionally, variable) in this archive member into the
relink things that have already had ld run on them. We use the archive link, so we can relink things that have already had ld run on them. We use
member name, sans any leading '.ctf.', as the CU name for ambiguous types if the archive member name, sans any leading '.ctf.', as the CU name for
there is one and it's not the default: otherwise, we use the name of the ambiguous types if there is one and it's not the default: otherwise, we use
input file. */ the name of the input file. */
static int static int
ctf_link_one_input_archive_member (ctf_file_t *in_fp, const char *name, void *arg_) ctf_link_one_input_archive_member (ctf_file_t *in_fp, const char *name, void *arg_)
{ {
@ -497,32 +622,16 @@ ctf_link_one_input_archive_member (ctf_file_t *in_fp, const char *name, void *ar
causes the system to erroneously conclude that all types are duplicated causes the system to erroneously conclude that all types are duplicated
and should be shared, even if they are not. */ and should be shared, even if they are not. */
if (arg->done_main_member) if (arg->done_parent)
return 0; return 0;
arg->arcname = strdup (".ctf.");
if (arg->arcname)
{
char *new_name;
new_name = ctf_str_append (arg->arcname, arg->file_name);
if (new_name)
arg->arcname = new_name;
else
free (arg->arcname);
}
} }
else else
{ {
arg->arcname = strdup (name);
/* Get ambiguous types from our parent. */ /* Get ambiguous types from our parent. */
ctf_import (in_fp, arg->main_input_fp); ctf_import (in_fp, arg->in_fp_parent);
arg->in_input_cu_file = 1; arg->in_input_cu_file = 1;
} }
if (!arg->arcname)
return ctf_set_errno (in_fp, ENOMEM);
arg->cu_name = name; arg->cu_name = name;
if (strncmp (arg->cu_name, ".ctf.", strlen (".ctf.")) == 0) if (strncmp (arg->cu_name, ".ctf.", strlen (".ctf.")) == 0)
arg->cu_name += strlen (".ctf."); arg->cu_name += strlen (".ctf.");
@ -532,7 +641,6 @@ ctf_link_one_input_archive_member (ctf_file_t *in_fp, const char *name, void *ar
err = ctf_variable_iter (in_fp, ctf_link_one_variable, arg); err = ctf_variable_iter (in_fp, ctf_link_one_variable, arg);
arg->in_input_cu_file = 0; arg->in_input_cu_file = 0;
free (arg->arcname);
if (err < 0) if (err < 0)
return -1; /* Errno is set for us. */ return -1; /* Errno is set for us. */
@ -551,61 +659,128 @@ empty_link_type_mapping (void *key _libctf_unused_, void *value,
ctf_dynhash_empty (fp->ctf_link_type_mapping); ctf_dynhash_empty (fp->ctf_link_type_mapping);
} }
/* Lazily open a CTF archive for linking, if not already open.
Returns the number of files contained within the opened archive (0 for none),
or -1 on error, as usual. */
static ssize_t
ctf_link_lazy_open (ctf_file_t *fp, ctf_link_input_t *input)
{
size_t count;
int err;
if (input->clin_arc)
return ctf_archive_count (input->clin_arc);
if (input->clin_fp)
return 1;
/* See ctf_link_add_ctf. */
#if defined (PIC) || !NOBFD
input->clin_arc = ctf_open (input->clin_filename, NULL, &err);
#else
ctf_err_warn (fp, 0, "Cannot open %s lazily: %s", input->clin_filename,
ctf_errmsg (ECTF_NEEDSBFD));
ctf_set_errno (fp, ECTF_NEEDSBFD);
return -1;
#endif
/* Having no CTF sections is not an error. We just don't need to do
anything. */
if (!input->clin_arc)
{
if (err == ECTF_NOCTFDATA)
return 0;
ctf_err_warn (fp, 0, "Opening CTF %s failed: %s",
input->clin_filename, ctf_errmsg (err));
ctf_set_errno (fp, err);
return -1;
}
if ((count = ctf_archive_count (input->clin_arc)) == 0)
ctf_arc_close (input->clin_arc);
return (ssize_t) count;
}
/* Close an input, as a ctf_dynhash_iter iterator. */
static void
ctf_link_close_one_input_archive (void *key _libctf_unused_, void *value,
void *arg _libctf_unused_)
{
ctf_link_input_t *input = (ctf_link_input_t *) value;
if (input->clin_arc)
ctf_arc_close (input->clin_arc);
input->clin_arc = NULL;
}
/* Link one input file's types into the output file. */ /* Link one input file's types into the output file. */
static void static void
ctf_link_one_input_archive (void *key, void *value, void *arg_) ctf_link_one_input_archive (void *key, void *value, void *arg_)
{ {
const char *file_name = (const char *) key; const char *file_name = (const char *) key;
ctf_archive_t *arc = (ctf_archive_t *) value; ctf_link_input_t *input = (ctf_link_input_t *)value;
ctf_link_in_member_cb_arg_t *arg = (ctf_link_in_member_cb_arg_t *) arg_; ctf_link_in_member_cb_arg_t *arg = (ctf_link_in_member_cb_arg_t *) arg_;
int err; int err = 0;
arg->file_name = file_name; if (!input->clin_arc)
arg->done_main_member = 0; {
if ((arg->main_input_fp = ctf_arc_open_by_name (arc, NULL, &err)) == NULL) err = ctf_link_lazy_open (arg->out_fp, input);
if (err == 0) /* Just no CTF. */
return;
if (err < 0)
return; /* errno is set for us. */
}
arg->in_file_name = file_name;
arg->done_parent = 0;
if ((arg->in_fp_parent = ctf_arc_open_by_name (input->clin_arc, NULL,
&err)) == NULL)
if (err != ECTF_ARNNAME) if (err != ECTF_ARNNAME)
{ {
ctf_dprintf ("Cannot open main archive member in input file %s in the " ctf_err_warn (arg->out_fp, 0, "Cannot open main archive member in "
"link: skipping: %s.\n", arg->file_name, "input file %s in the link: skipping: %s",
ctf_errmsg (err)); arg->in_file_name, ctf_errmsg (err));
return; goto out;
} }
if (ctf_link_one_input_archive_member (arg->main_input_fp, if (ctf_link_one_input_archive_member (arg->in_fp_parent,
_CTF_SECTION, arg) < 0) _CTF_SECTION, arg) < 0)
{ {
ctf_file_close (arg->main_input_fp); ctf_file_close (arg->in_fp_parent);
return; goto out;
} }
arg->done_main_member = 1; arg->done_parent = 1;
if (ctf_archive_iter (arc, ctf_link_one_input_archive_member, arg) < 0) if (ctf_archive_iter (input->clin_arc, ctf_link_one_input_archive_member,
ctf_dprintf ("Cannot traverse archive in input file %s: link " arg) < 0)
"cannot continue: %s.\n", arg->file_name, ctf_err_warn (arg->out_fp, 0, "Cannot traverse archive in input file %s: "
ctf_errmsg (ctf_errno (arg->out_fp))); "link cannot continue: %s", arg->in_file_name,
ctf_errmsg (ctf_errno (arg->out_fp)));
else else
{ {
/* The only error indication to the caller is the errno: so ensure that it /* The only error indication to the caller is the errno: so ensure that it
is zero if there was no actual error from the caller. */ is zero if there was no actual error from the caller. */
ctf_set_errno (arg->out_fp, 0); ctf_set_errno (arg->out_fp, 0);
} }
ctf_file_close (arg->main_input_fp); ctf_file_close (arg->in_fp_parent);
/* Discard the now-unnecessary mapping table data. */ out:
if (arg->out_fp->ctf_link_type_mapping) ctf_link_close_one_input_archive (key, value, NULL);
ctf_dynhash_empty (arg->out_fp->ctf_link_type_mapping);
ctf_dynhash_iter (arg->out_fp->ctf_link_outputs, empty_link_type_mapping, NULL);
} }
/* Merge types and variable sections in all files added to the link /* Merge types and variable sections in all files added to the link
together. */ together. All the added files are closed. */
int int
ctf_link (ctf_file_t *fp, int share_mode) ctf_link (ctf_file_t *fp, int flags)
{ {
ctf_link_in_member_cb_arg_t arg; ctf_link_in_member_cb_arg_t arg;
memset (&arg, 0, sizeof (struct ctf_link_in_member_cb_arg)); memset (&arg, 0, sizeof (struct ctf_link_in_member_cb_arg));
arg.out_fp = fp; arg.out_fp = fp;
arg.share_mode = share_mode; fp->ctf_link_flags = flags;
if (fp->ctf_link_inputs == NULL) if (fp->ctf_link_inputs == NULL)
return 0; /* Nothing to do. */ return 0; /* Nothing to do. */
@ -613,7 +788,8 @@ ctf_link (ctf_file_t *fp, int share_mode)
if (fp->ctf_link_outputs == NULL) if (fp->ctf_link_outputs == NULL)
fp->ctf_link_outputs = ctf_dynhash_create (ctf_hash_string, fp->ctf_link_outputs = ctf_dynhash_create (ctf_hash_string,
ctf_hash_eq_string, free, ctf_hash_eq_string, free,
ctf_file_close_thunk); (ctf_hash_free_fun)
ctf_file_close);
if (fp->ctf_link_outputs == NULL) if (fp->ctf_link_outputs == NULL)
return ctf_set_errno (fp, ENOMEM); return ctf_set_errno (fp, ENOMEM);
@ -621,7 +797,12 @@ ctf_link (ctf_file_t *fp, int share_mode)
ctf_dynhash_iter (fp->ctf_link_inputs, ctf_link_one_input_archive, ctf_dynhash_iter (fp->ctf_link_inputs, ctf_link_one_input_archive,
&arg); &arg);
if (ctf_errno (fp) != 0) /* Discard the now-unnecessary mapping table data from all the outputs. */
if (fp->ctf_link_type_mapping)
ctf_dynhash_empty (fp->ctf_link_type_mapping);
ctf_dynhash_iter (fp->ctf_link_outputs, empty_link_type_mapping, NULL);
if ((ctf_errno (fp) != 0) && (ctf_errno (fp) != ECTF_NOCTFDATA))
return -1; return -1;
return 0; return 0;
} }
@ -908,7 +1089,7 @@ ctf_link_write (ctf_file_t *fp, size_t *size, size_t threshold)
free (arg.dynames[i]); free (arg.dynames[i]);
free (arg.dynames); free (arg.dynames);
} }
ctf_dprintf ("Cannot write archive in link: %s failure: %s\n", errloc, ctf_err_warn (fp, 0, "Cannot write archive in link: %s failure: %s", errloc,
ctf_errmsg (ctf_errno (fp))); ctf_errmsg (ctf_errno (fp)));
return NULL; return NULL;
} }

2
libctf/libctf.ver
View File

@ -156,8 +156,6 @@ LIBCTF_1.0 {
ctf_getdebug; ctf_getdebug;
ctf_errwarning_next; ctf_errwarning_next;
/* Not yet part of the stable API. */
ctf_link_add_ctf; ctf_link_add_ctf;
ctf_link_add_cu_mapping; ctf_link_add_cu_mapping;
ctf_link_set_memb_name_changer; ctf_link_set_memb_name_changer;