Commit Graph

15 Commits

Author SHA1 Message Date
Dodji Seketeli
5350583ec1 Fix scope for DIEs with specification or abstract_origin attributes
* src/abg-dwarf-reader.cc (get_scope_for_die): If the DIE has a
	DW_AT_specification or DW_AT_abstract_origin attribute, get the
	scope of the referred-to DIE.
	(build_ir_node_from_die): For a variable DIE that has a
	DW_AT_{specification,abstract_origin} attribute, do not add the
	built variable IR node to its scope because it is already in a
	scope.  It's in a scope because that built variable is for the DIE
	that is referred-to by the DW_AT_{specification,abstract_origin}
	attribute.  Likewise for member functions.  Also, now,
	get_scope_for_die can return a class for a function DIE because
	get_scope_for_die now returns the *logical* scope of the DIE; that
	is, it follows DW_AT_{specification,abstract_origin} attributes.
	* tests/data/test-read-dwarf/test1.abi: Adjust.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-29 18:12:54 +02:00
Dodji Seketeli
e2d450176b Add a symbol database to the ABI Corpus & support symbol aliases
* include/abg-corpus.h (corpus::{g,s}et_{fun,var}_symbol_map{_sptr}):
	Declare new accessors.
	(corpus::lookup_{variable,function}_symbol): Declare new member
	functions.
	* src/abg-corpus.cc (corpus::{g,s}et_{fun,var}_symbol_map{_sptr}):
	Define new accessors.
	(corpus::lookup_{variable,function}_symbol): Define new member
	functions.
	* include/abg-ir.h (string_elf_symbol_sptr_map_type)
	(string_elf_symbol_sptr_map_sptr, elf_symbols)
	(string_elf_symbols_map_type, string_elf_symbols_map_sptr): New
	convenience typedefs.
	(elf_symbol::{get_main_symbol, is_main_symbol, get_next_alias,
	has_aliases, add_alias, get_id_string,
	get_name_and_version_from_id, operator=}): Declare new member
	functions.
	* src/abg-ir.cc (elf_symbol::{get_main_symbol, is_main_symbol,
	get_next_alias, has_aliases, add_alias, get_id_string,
	get_name_and_version_from_id, operator=}): Define new member
	functions.
	* include/abg-reader.h (read_corpus_from_file): Take a shared
	pointer to corpus.
	* src/abg-reader.cc (read_context::{g,s}et_corpus): Define these.
	(build_elf_symbol_db, build_elf_symbol_from_reference)
	(read_symbol_db_from_input): Define new functions.
	(read_corpus_from_input): Adjust.  Make it read symbol databases.
	(build_elf_symbol): Harden this.
	(build_{var,function}_decl): Read the symbol reference.  Do not
	read the local symbol serialization anymore.
	(read_corpus_from_archive): Adjust.
	(read_corpus_from_file): Take a reference to a shared pointer to
	corpus, rather than a reference to the corpus.
	(read_corpus_from_native_xml): Only keep the overload that returns
	a corpus.  Set the current context with the corpus.
	* src/abg-dwarf-reader.cc (addr_elf_symbol_sptr_map_type)
	(addr_elf_symbol_sptr_map_sptr): New convenience typedefs.
	(read_context::{fun_sym_addr_sym_index_map_,
	var_sym_addr_sym_index_map_): Remove.
	(read_context::{fun,var}_addr_sym_map_): New.  Replace the above
	that got removed.
	(read_context::{var,fun}_syms_): New.
	(read_context::lookup_elf_{fn,var}_symbol_from_address): Adjust.
	(read_context::{fun,var}_addr_sym_map{_sptr}): New.
	(read_context::{fun,var}_syms{_sptr}): New.
	(read_context::load_symbol_maps): Replace
	read_context::load_symbol_addr_to_index_maps.  Adjust to load all
	the new maps.
	(read_context::maybe_load_symbol_maps): New.
	(read_debug_info_into_corpus): Renamed build_corpus into this.
	Update to load symbol maps and set it to the corpus.
	* src/abg-writer.cc (write_context::get_fun_symbol_map): New
	accessor.
	(write_elf_symbol_aliases, write_elf_symbol_reference)
	(write_elf_symbols_table): Define new static functions.
	(write_var_decl): Write the reference to the underlying symbol of
	the variable.  Do not write the full symbol here anymore.
	(write_function_decl):  Likewise, write the reference to the
	underlying symbol of the function.  Do not write the full symbol
	here anymore.
	(write_corpus_to_native_xml): Write the symbol databases at the
	beginning of the corpus document.
	* src/abg-comparison.cc
	(corpus_diff::priv::ensure_lookup_tables_populated): Now that the
	corpus has symbols, check if a the symbol of an allegedly deleted
	function (resp. variable) is deleted; if not, then do not report
	the function (resp. variable) as deleted.  Similarly, check if the
	symbol of an allegedly added function (resp. variable) is added.
	if not, the do not report the function (resp. variable) as added.
	* tests/test-write-read-archive.cc (main): Adjust.
	* tools/biar.cc (extract_tus_from_archive): Likewise.
	* tests/data/test-diff-filter/test9-report.txt: Adjust.
	* tests/data/test-read-dwarf/test0.abi: Likewise.
	* tests/data/test-read-dwarf/test1.abi: Likewise.
	* tests/data/test-read-dwarf/test2.so.abi: Likewise.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-28 16:33:35 +02:00
Dodji Seketeli
0237455e57 Add clone in the scope of the cloned decl they logically belong to
* src/abg-dwarf-reader.cc (build_ir_node_from_die): Do not try to
	add the cloned function/variable to the current scope because
	cloning should have added the decl into the scope of the cloned
	target.
	* src/abg-ir.cc ({var,function}_decl::clone): Insert the clone
	decl into the scope of the cloned decl.  My understanding is that
	it's where they belong.
	* tests/data/test-read-dwarf/test1.abi: Update this to incorporate
	all the abstract constructors/destructors *and* their clones into
	the classes where they belong.
	* tests/data/test-read-dwarf/test1.abi: Adjust for the abstract
	cdtor being added to the class, as well as their cloned concrete
	instances.
	* tests/data/test-read-dwarf/test2.so.abi: Likewise.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-21 12:25:45 +02:00
Dodji Seketeli
c91461a8c8 Don't share types across TUs when DW_TAG_partial_unit are involved
* src/abg-dwarf-reader.cc (build_translation_unit_and_add_to_ir):
	Clear the part of the context that needs to be per TU.
	(build_ir_node_from_die): Assert that this should not be called
	for partial and imported unit because for now our practical
	assumption is that DIEs under partial unit are lazily read only
	when referenced by DIEs that are under DW_TAG_compile_unit.
	* tests/Makefile.am: Add the new test files to the build system.
	* tests/data/test-read-dwarf/test2.so.abi: Fix the reference
	output here to avoid sharing types across TUs, making the output
	valid for bilint.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-19 21:35:56 +02:00
Dodji Seketeli
c469546e45 Initial support for DW_TAG_partial_unit
* src/abg-dwarf-reader.cc (read_context::cur_tu_die_): New member.
	(read_context::read_context): Initialize the new member.
	(read_context::cur_tu_die): New accessors.
	(find_last_import_unit_point_before_die): New static function.
	(get_parent_die): Take a logical current die offset parameter.  If
	the die we want the parent for is a partial unit, then find the
	last DW_TAG_imported_unit that imports that partial unit before
	the logical current die and return the parent of that
	DW_TAG_imported_unit die.
	(get_scope_for_die): Take a logical current die offset parameter.
	Adjust.
	(build_translation_unit_and_add_to_ir): Set/unset the current
	translation unit DIE in the context.  Adjust.
	(build_namespace_decl_and_add_to_ir)
	(build_class_type_and_add_to_ir, build_qualified_type)
	(build_pointer_type_def, build_reference_type, build_typedef_type)
	(build_var_decl, build_function_decl, build_ir_node_from_die):
	Take a logical current die offset parameter.  Adjust.
	(build_corpus): Accept that we can have DIE that are not
	DW_TAG_compile_unit at the top level, because, well, we can now
	have DW_TAG_partial_unit too.
	* tests/data/test-read-dwarf/test2-{0,1}.cc: New test source
	files.
	* tests/data/test-read-dwarf/test2.h: Likewise.
	* tests/data/test-read-dwarf/test2.so: New input binary to read.
	* tests/data/test-read-dwarf/test2.so.abi: New reference test to
	compare against.
	* tests/test-read-dwarf.cc: Adjust to launch the new test.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-19 17:26:40 +02:00
Dodji Seketeli
335d8786b2 Serialize and de-serialize elf symbols for var & function decls
* abg-ir.h (string_to_elf_symbol_type, string_to_elf_symbol_binding):
	Declare new entry points.
	* src/abg-ir.cc (string_to_elf_symbol_type)
	(string_to_elf_symbol_binding): Define new entry points.
	* include/abg-libxml-utils.h (xml_char_sptr_to_string): Declare
	new entry points.
	* src/abg-libxml-utils.cc (xml_char_sptr_to_string): Define new
	entry points.
	* src/abg-reader.cc (read_elf_symbol_type)
	(read_elf_symbol_binding, build_elf_symbol): Define new static
	functions.
	(build_function_decl, build_var_decl): Use the new
	build_elf_symbol and set the symbol to the function.  Flag the
	function as having a public symbol in the symbol table if the
	symbol is public.
	* src/abg-writer.cc (write_elf_symbol_type)
	(write_elf_symbol_binding, write_elf_symbol): Define new static
	functions.
	(write_var_decl, write_function_decl): Use the new
	write_elf_symbol to serialize the symbol for the decl.
	* tests/data/test-read-dwarf/test[01].abi: Adjust.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-14 11:19:34 +02:00
Dodji Seketeli
ce1278c3da Initial support for elf symbol (versionning) during decl comparison
* include/abg-fwd.h (get_linkage_name): Remove.
	* include/abg-dwarf-reader.h (enum symbol_type)
	(enum symbol_binding): Move these into abg-ir.h.
	(lookup_symbol_from_elf, lookup_public_function_symbol_from_elf):
	Adjust.
	* src/abg-dwarf-reader.cc (eval_last_constant_dwarf_sub_expr):
	Declare this before using it.
	(die_address_attribute, die_location_address)
	(stt_to_elf_symbol_type, stb_to_elf_symbol_binding)
	(find_hash_table_section_index, find_symbol_table_section)
	(find_symbol_table_section_index, find_text_section)
	(find_bss_section, compare_symbol_name)
	(get_symbol_versionning_sections get_version_for_symbol)
	(lookup_symbol_from_sysv_hash_tab)
	(lookup_symbol_from_gnu_hash_tab, get_elf_class_size_in_bytes)
	(bloom_word_at, setup_gnu_ht, lookup_symbol_from_elf_hash_tab)
	(lookup_symbol_from_symtab, maybe_adjust_fn_sym_address)
	(maybe_adjust_var_sym_address): New static functions.
	(enum hash_table_kind): New enum.
	(struct gnu_ht): New struct.
	(read_context::var_decls_to_add_): Renamed var_decls_to_add into
	this.
	(read_context::{fun, var}_sym_addr_sym_index_map_): New member.
	(read_context::{lookup_symbol_from_elf,
	lookup_elf_symbol_from_index, lookup_elf_fn_symbol_from_address,
	lookup_elf_var_symbol_from_address, fun_sym_addr_sym_index_map,
	var_sym_addr_sym_index_map, load_symbol_addr_to_index_maps,
	get_function_address, get_variable_address}): New member
	functions.
	(read_context::lookup_public_{variable,
	function}_symbol_from_elf): Adjust.
	(op_pushes_constant_value): Fix a bug here.
	(lookup_symbol_from_elf): Adjust.  Support cases where there is no
	elf hash table, e.g, for relocatable files.
	(lookup_public_function_symbol_from_elf)
	(lookup_public_variable_symbol_from_elf): Adjust.
	(build_var_decl): Allow updating the var_decl to associate it with
	its underlying symbol.  In that case, if the linkage name is not
	set, set it to the symbol name.
	(build_function_decl): Likewise for function_decl.
	(operator<<(std::ostream&, symbol_type)):
	(operator<<(std::ostream&, symbol_binding)): Move these do
	abg-ir.cc.
	* include/abg-ir.h (class elf_symbol): Declare new class.  Move
	enum symbol_binding and enum symbol_type (from abg-dwarf-reader.h) to
	elf_symbol::binding and elf_symbol::type here.
	(operator<<(std::ostream&, elf_symbol::type))
	(operator<<(std::ostream&, elf_symbol::binding))
	(operator==(const elf_symbol_sptr, const elf_symbol_sptr)): New
	operators.
	(class elf_symbol::version): Declare new class.
	(class var_decl): Make this pimpl, and add ...
	(var_decl::{g,s}et_symbol): ... new member functions.
	(class function_decl): Likewise, make this pimpl and add ...
	(function_decl::{g,s}et_symbol): ... new member functions.
	* src/abg-ir.cc (struct elf_symbol, elf_symbol::priv): New
	types.
	(elf_symbol::*): Lots of new members and member functions.
	(operator==(const elf_symbol_sptr, const elf_symbol_sptr)): New.
	(operator<<(std::ostream&, elf_symbol::type)): New.
	(operator<<(std::ostream&, elf_symbol::binding)): New.
	(elf_symbol::version::priv): New type.
	(elf_symbol::version::*): Lots of member functions.
	(get_linkage_name): Removed.
	(var_decl::priv): New type.  Pimplify the thing.
	(var_decl::{s,g}et_symbol): New.
	(var_decl::operator==): Take symbols in account in the comparison.
	(function_decl::priv): New type.
	(function_decl::*): Pimplify.
	(function_decl::{s,g}et_symbol): New.
	(function_decl::operator==): Take symbols in account in the
	comparison.
	* include/abg-comparison.h (diff_context::show_linkage_name): New
	member function.
	* src/abg-comparison.cc (diff_context::priv::show_linkage_name_):
	New member.
	(diff_context::priv::priv): Initialize it.
	(diff_context::show_linkage_names): New member function.
	(corpus_diff::report): If the user used --show-linkage-names,
	display the linkage name after the name of the functions.  Add
	missing "'" in the some spots.
	* tools/bidiff.cc (options.show_linkage_names): New member.
	(display_usage, parse_command_line): Support --linkage-names.
	* tools/bisym.cc (show_help): Add '\n' at the end of help string
	for --demangle.  Add --no-absolute-path option.
	(parse_command_line): Support --no-absolute-path.
	(main): Adjust for symbol (versionning) support.  Consider that
	the program successfully completed even when the symbol wasn't
	found.  Support --no-absolute-path.
	* tests/data/test-lookup-syms/test0-report.txt: New.
	* tests/data/test-lookup-syms/test01-report.txt: New.
	* tests/data/test-lookup-syms/test02-report.txt: New.
	* tests/data/test-read-dwarf/test0.abi: Adjust.
	* tests/data/test-read-dwarf/test1.abi: Adjust.
	* tests/data/test-diff-dwarf/test7-report.txt: Adjust.
	* tests/data/test-diff-filter/test10-report.txt: Adjust.
	* tests/data/test-diff-filter/test12-report.txt: Adjust.
	* tests/data/test-lookup-syms/test1-[123]-report.txt: New.
	* tests/data/test-lookup-syms/test1.c: New.
	* tests/data/test-lookup-syms/test1.version-script: New.
	* tests/test-lookup-syms.cc: Adjust for new tests.
	* test/Makefile.am: Adjust makefile.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-05-12 16:09:47 +02:00
Dodji Seketeli
04a1e27258 Follow DW_AT_abstract_origin and add missing mangled name
* src/abg-dwarf-reader.cc (build_function_decl): Change signature
	to take function_decl to which one shall add properties that got
	added by subsequent DIEs later.
	(build_class_type_and_add_to_ir): Adjust.
	(build_function_decl): Allow adding new properties to an existing
	function_decl.  Add the mangled name in particular.
	* tests/data/test-read-dwarf/test1.abi: Update test.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-03-24 12:22:05 +01:00
Dodji Seketeli
42aaa3124e Do not declare classes before defining them anymore
* src/abg-dwarf-reader.cc (build_class_type_and_add_to_ir): Do not
	declare classes before defining them because both the declaration
	and the definition now compare equal.
	* tests/data/test-read-dwarf/test1.abi: Update test.
	* tests/data/test-read-write/test20.xml: Likewise.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-03-11 13:55:35 +01:00
Dodji Seketeli
1c6f62bad7 Tell struct and class apart
* include/abg-ir.h (class_decl::is_struct_): New member.
	(class_decl::class_decl): Take an additional is_struct member.
	(class_decl::is_struct): New getter.
	* src/abg-ir.cc (class_decl::class_decl): Initialize the new
	is_struct_ data member.
	(class_decl::get_pretty_representation): Tell struct and class
	apart.
	* abg-reader.cc (read_is_struct): New static function.
	(build_class_decl): Capture the struct-ness of the class.
	* src/abg-dwarf-reader.cc (build_class_type_and_add_to_ir):
	Likewise.
	* src/abg-writer.cc (write_is_struct): New static function.
	(write_class_decl): Write the struct-ness of the class.
	* tests/data/test-read-dwarf/test1.abi: Update test.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-03-10 10:04:34 +01:00
Dodji Seketeli
5ff3176ad1 Skip artificial (member) functions from DWARF
* src/abg-dwarf-reader.cc (die_is_artificial): New static
	function.
	(build_class_type_and_add_to_ir, build_ir_node_from_die): Use the
	die_is_artificial function to test if the function DIE is
	artificial and then skip it.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-02-28 17:59:39 +01:00
Dodji Seketeli
a97dd610f6 Insert reference, pointers and qual types at their declaration point
* src/abg-dwarf-reader.cc (build_ir_node_from_die): Insert
	reference, pointers and qualified types at the point where we see
	them, in their scope, rather than under the scope of their
	underlying type.  This is because their might be first declared as
	member types and we don't want to loose that information.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-02-26 12:40:59 +01:00
Dodji Seketeli
b152fa74b4 Just add decls sequentially when reading from DWARF
* src/abg-dwarf-reader.cc (insert_decl_into_ir_under_scope)
	(build_namespace_decl_and_add_to_ir, build_enum_type)
	(build_class_type_and_add_to_ir, build_ir_node_from_die)
	(build_ir_node_from_die): Remove.
	* tests/data/test-read-dwarf/test0.abi: Update because now type
	IDs can be used before they are defined.
	* tests/data/test-read-dwarf/test1.abi: Likewise.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-01-20 10:32:37 +01:00
Dodji Seketeli
3045c0aef2 Tweak dwarf reading test to detect more namespace linking-fu
* tests/data/test-read-dwarf/test0.cc: Define a member function
	out-of-line, outside of its namespace.
	* tests/data/test-read-dwarf/test0.abi: Update the .abi file.
	* tests/data/test-read-dwarf/test0: Update the resulting binary.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-01-13 17:36:20 +01:00
Dodji Seketeli
8f9b8e76a0 Add regression tests for dwarf reading
* tests/test-read-dwarf.cc: New dwarf reading regression test.
	* tests/data/test-read-dwarf/test0: New test input.
	* data/test-read-dwarf/test0: Likewise.
	* data/test-read-dwarf/test0.abi: Likewise.
	* data/test-read-dwarf/test0.cc: Likewise.
	* data/test-read-dwarf/test1: Likewise.
	* data/test-read-dwarf/test1.abi: Likewise.
	* data/test-read-dwarf/test1.cc: Likewise.
	* tests/Makefile.am: Build the new tests/test-read-dwarf.cc file.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
2014-01-07 15:51:52 +01:00