Dodji Seketeli 897ecc9a49 Add support for undefined symbols in the BTF reader ...

This patch teaches the BTF reader how to construct an IR for undefined
interfaces.  The patch also updates the abicompat tool for BTF
support.

	* doc/manuals/abicompat.rst: Update documentation for the --btf
	option of abicompat.
	* include/abg-elf-reader.h
	(elf::reader::{function,variable}_symbol_is_undefined): Declare
	new member functions.
	* src/abg-btf-reader.cc
	(reader::read_debug_info_into_corpus): Sort functions &
	variables after canonicalization.
	(reader::build_ir_node_from_btf_type): Always call
	fe_iface::add_{fn,var}_to_exported_or_undefined_decls with the
	decl that was constructed.
	(reader::build_function_decl): Support setting an undefined symbol
	to the function decl.
	(reader::build_var_decl): Likewise, support setting undefined
	symbol the variable decl.
	* src/abg-elf-reader.cc
	((elf::reader::{function,variable}_symbol_is_undefined): Declare
	new member functions.): Define new member functions.
	* src/abg-symtab-reader.cc
	(symtab::{function,variable}_symbol_is_undefined): Return the
	undefined symbol that was found.
	* src/abg-symtab-reader.h
	(symtab::{function,variable}_symbol_is_undefined): Return an
	undefined symbol rather than just a boolean value.
	* tools/abicompat.cc: Add support for BTF here.
	(options::use_btf): Define new data member ...
	(options::options): ... and initialize it.
	(display_usage): Add a help string for the --btf option.
	(parse_command_line): Parse the --btf option.
	* tests/data/test-abicompat/test7-fn-changed-report-0.1.txt: New
	reference test output file.
	* tests/data/test-abicompat/test7-fn-changed-report-2.1.txt:
	Likewise.
	* tests/data/test-abicompat/libtest7-fn-changed-libapp-btf-v0.so:
	New binary input file.
	* tests/data/test-abicompat/libtest7-fn-changed-libapp-btf-v1.so:
	Likewise.
	* tests/data/test-abicompat/test7-fn-changed-app.btf: Likewise.
	* tests/data/Makefile.am: Add the new test material to source
	distribution.
	* tests/test-abicompat.cc (in_out_specs): Add the new test input
	to the test harness.
	* tests/data/test-abicompat/test7-fn-changed-app.c: Adjust.
	* tests/data/test-abicompat/test7-fn-changed-libapp-v0.c:
	Likewise.
	* tests/data/test-abicompat/test7-fn-changed-libapp-v1.c: Likewise

Signed-off-by: Dodji Seketeli <dodji@redhat.com>

2024-03-14 16:27:07 +01:00

16 KiB

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