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268a13a5a3
This is the next patch in the ongoing series to move gdbsever to the top level. This patch just renames the "common" directory. The idea is to do this move in two parts: first rename the directory (this patch), then move the directory to the top. This approach makes the patches a bit more tractable. I chose the name "gdbsupport" for the directory. However, as this patch was largely written by sed, we could pick a new name without too much difficulty. Tested by the buildbot. gdb/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * contrib/ari/gdb_ari.sh: Change common to gdbsupport. * configure: Rebuild. * configure.ac: Change common to gdbsupport. * gdbsupport: Rename from common. * acinclude.m4: Change common to gdbsupport. * Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES) (HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to gdbsupport. * aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c, amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c, amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c, amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c, amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c, arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c, arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c, arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c, arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c, auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h, btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c, charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c, cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c, coff-pe-read.c, command.h, compile/compile-c-support.c, compile/compile-c.h, compile/compile-cplus-symbols.c, compile/compile-cplus-types.c, compile/compile-cplus.h, compile/compile-loc2c.c, compile/compile.c, completer.c, completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c, cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c, darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c, disasm.h, dtrace-probe.c, dwarf-index-cache.c, dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c, dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c, event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c, features/aarch64-core.c, features/aarch64-fpu.c, features/aarch64-pauth.c, features/aarch64-sve.c, features/i386/32bit-avx.c, features/i386/32bit-avx512.c, features/i386/32bit-core.c, features/i386/32bit-linux.c, features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c, features/i386/32bit-segments.c, features/i386/32bit-sse.c, features/i386/64bit-avx.c, features/i386/64bit-avx512.c, features/i386/64bit-core.c, features/i386/64bit-linux.c, features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c, features/i386/64bit-segments.c, features/i386/64bit-sse.c, features/i386/x32-core.c, features/riscv/32bit-cpu.c, features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c, features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c, features/riscv/64bit-fpu.c, features/tic6x-c6xp.c, features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h, findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h, gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c, gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c, go32-nat.c, guile/guile.c, guile/scm-ports.c, guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c, i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c, i386-linux-tdep.c, i386-tdep.c, i387-tdep.c, ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c, inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h, inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h, inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c, linux-tdep.c, linux-thread-db.c, location.c, machoread.c, macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h, mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h, minsyms.c, mips-linux-tdep.c, namespace.h, nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h, nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c, nat/amd64-linux-siginfo.c, nat/fork-inferior.c, nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c, nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c, nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h, nat/linux-waitpid.c, nat/mips-linux-watch.c, nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c, nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c, nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h, obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c, parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c, procfs.c, producer.c, progspace.h, psymtab.h, python/py-framefilter.c, python/py-inferior.c, python/py-ref.h, python/py-type.c, python/python.c, record-btrace.c, record-full.c, record.c, record.h, regcache-dump.c, regcache.c, regcache.h, remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c, riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c, selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c, ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c, source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c, stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h, symtab.c, symtab.h, target-descriptions.c, target-descriptions.h, target-memory.c, target.c, target.h, target/waitstatus.c, target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c, top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c, tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h, unittests/array-view-selftests.c, unittests/child-path-selftests.c, unittests/cli-utils-selftests.c, unittests/common-utils-selftests.c, unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c, unittests/format_pieces-selftests.c, unittests/function-view-selftests.c, unittests/lookup_name_info-selftests.c, unittests/memory-map-selftests.c, unittests/memrange-selftests.c, unittests/mkdir-recursive-selftests.c, unittests/observable-selftests.c, unittests/offset-type-selftests.c, unittests/optional-selftests.c, unittests/parse-connection-spec-selftests.c, unittests/ptid-selftests.c, unittests/rsp-low-selftests.c, unittests/scoped_fd-selftests.c, unittests/scoped_mmap-selftests.c, unittests/scoped_restore-selftests.c, unittests/string_view-selftests.c, unittests/style-selftests.c, unittests/tracepoint-selftests.c, unittests/unpack-selftests.c, unittests/utils-selftests.c, unittests/xml-utils-selftests.c, utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c, value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c, xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c, xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport. gdb/gdbserver/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * configure: Rebuild. * configure.ac: Change common to gdbsupport. * acinclude.m4: Change common to gdbsupport. * Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS) (version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change common to gdbsupport. * ax.c, event-loop.c, fork-child.c, gdb_proc_service.h, gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c, inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c, linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c, linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c, linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h, nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c, server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h, thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change common to gdbsupport.
362 lines
15 KiB
C++
362 lines
15 KiB
C++
/* Interface to C preprocessor macro tables for GDB.
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Copyright (C) 2002-2019 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef MACROTAB_H
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#define MACROTAB_H
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#include "gdbsupport/function-view.h"
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struct obstack;
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struct bcache;
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struct compunit_symtab;
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/* How do we represent a source location? I mean, how should we
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represent them within GDB; the user wants to use all sorts of
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ambiguous abbreviations, like "break 32" and "break foo.c:32"
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("foo.c" may have been #included into several compilation units),
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but what do we disambiguate those things to?
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- Answer 1: "Filename and line number." (Or column number, if
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you're picky.) That's not quite good enough. For example, the
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same source file can be #included into several different
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compilation units --- which #inclusion do you mean?
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- Answer 2: "Compilation unit, filename, and line number." This is
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a pretty good answer; GDB's `struct symtab_and_line' basically
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embodies this representation. But it's still ambiguous; what if a
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given compilation unit #includes the same file twice --- how can I
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set a breakpoint on line 12 of the fifth #inclusion of "foo.c"?
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- Answer 3: "Compilation unit, chain of #inclusions, and line
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number." This is analogous to the way GCC reports errors in
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#include files:
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$ gcc -c base.c
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In file included from header2.h:8,
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from header1.h:3,
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from base.c:5:
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header3.h:1: parse error before ')' token
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$
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GCC tells you exactly what path of #inclusions led you to the
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problem. It gives you complete information, in a way that the
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following would not:
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$ gcc -c base.c
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header3.h:1: parse error before ')' token
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$
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Converting all of GDB to use this is a big task, and I'm not really
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suggesting it should be a priority. But this module's whole
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purpose is to maintain structures describing the macro expansion
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process, so I think it's appropriate for us to take a little care
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to do that in a complete fashion.
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In this interface, the first line of a file is numbered 1, not 0.
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This is the same convention the rest of GDB uses. */
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/* A table of all the macro definitions for a given compilation unit. */
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struct macro_table;
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/* The definition of a single macro. */
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struct macro_definition;
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/* A source file that participated in a compilation unit --- either a
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main file, or an #included file. If a file is #included more than
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once, the presence of the `included_from' and `included_at_line'
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members means that we need to make one instance of this structure
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for each #inclusion. Taken as a group, these structures form a
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tree mapping the #inclusions that contributed to the compilation
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unit, with the main source file as its root.
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Beware --- not every source file mentioned in a compilation unit's
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symtab structures will appear in the #inclusion tree! As of Oct
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2002, GCC does record the effect of #line directives in the source
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line info, but not in macro info. This means that GDB's symtabs
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(built from the former, among other things) may mention filenames
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that the #inclusion tree (built from the latter) doesn't have any
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record of. See macroscope.c:sal_macro_scope for how to accomodate
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this.
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It's worth noting that libcpp has a simpler way of representing all
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this, which we should consider switching to. It might even be
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suitable for ordinary non-macro line number info.
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Suppose you take your main source file, and after each line
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containing an #include directive you insert the text of the
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#included file. The result is a big file that pretty much
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corresponds to the full text the compiler's going to see. There's
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a one-to-one correspondence between lines in the big file and
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per-inclusion lines in the source files. (Obviously, #include
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directives that are #if'd out don't count. And you'll need to
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append a newline to any file that doesn't end in one, to avoid
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splicing the last #included line with the next line of the
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#including file.)
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Libcpp calls line numbers in this big imaginary file "logical line
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numbers", and has a data structure called a "line map" that can map
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logical line numbers onto actual source filenames and line numbers,
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and also tell you the chain of #inclusions responsible for any
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particular logical line number. Basically, this means you can pass
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around a single line number and some kind of "compilation unit"
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object and you get nice, unambiguous source code locations that
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distinguish between multiple #inclusions of the same file, etc.
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Pretty neat, huh? */
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struct macro_source_file
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{
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/* The macro table for the compilation unit this source location is
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a part of. */
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struct macro_table *table;
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/* A source file --- possibly a header file. This filename is relative to
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the compilation directory (table->comp_dir), it exactly matches the
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symtab->filename content. */
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const char *filename;
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/* The location we were #included from, or zero if we are the
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compilation unit's main source file. */
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struct macro_source_file *included_by;
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/* If `included_from' is non-zero, the line number in that source
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file at which we were included. */
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int included_at_line;
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/* Head of a linked list of the source files #included by this file;
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our children in the #inclusion tree. This list is sorted by its
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elements' `included_at_line' values, which are unique. (The
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macro splay tree's ordering function needs this property.) */
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struct macro_source_file *includes;
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/* The next file #included by our `included_from' file; our sibling
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in the #inclusion tree. */
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struct macro_source_file *next_included;
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};
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/* Create a new, empty macro table. Allocate it in OBSTACK, or use
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xmalloc if OBSTACK is zero. Use BCACHE to store all macro names,
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arguments, definitions, and anything else that might be the same
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amongst compilation units in an executable file; if BCACHE is zero,
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don't cache these things. CUST is a pointer to the containing
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compilation unit, or NULL if there isn't one.
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Note that, if either OBSTACK or BCACHE are non-zero, then removing
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information from the table may leak memory. Neither obstacks nor
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bcaches really allow you to remove information, so although we can
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update the data structure to record the change, we can't free the
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old data. At the moment, since we only provide obstacks and
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bcaches for macro tables for symtabs, this isn't a problem; only
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odd debugging information makes a definition and then deletes it at
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the same source location (although 'gcc -DFOO -UFOO -DFOO=2' does
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do that in GCC 4.1.2.). */
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struct macro_table *new_macro_table (struct obstack *obstack,
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struct bcache *bcache,
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struct compunit_symtab *cust);
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/* Free TABLE, and any macro definitions, source file structures,
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etc. it owns. This will raise an internal error if TABLE was
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allocated on an obstack, or if it uses a bcache. */
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void free_macro_table (struct macro_table *table);
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/* Set FILENAME as the main source file of TABLE. Return a source
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file structure describing that file; if we record the #definition
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of macros, or the #inclusion of other files into FILENAME, we'll
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use that source file structure to indicate the context.
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The "main source file" is the one that was given to the compiler;
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all other source files that contributed to the compilation unit are
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#included, directly or indirectly, from this one.
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The macro table makes its own copy of FILENAME; the caller is
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responsible for freeing FILENAME when it is no longer needed. */
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struct macro_source_file *macro_set_main (struct macro_table *table,
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const char *filename);
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/* Return the main source file of the macro table TABLE. */
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struct macro_source_file *macro_main (struct macro_table *table);
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/* Mark the macro table TABLE so that macros defined in this table can
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be redefined without error. Note that it invalid to call this if
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TABLE is allocated on an obstack. */
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void macro_allow_redefinitions (struct macro_table *table);
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/* Record a #inclusion.
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Record in SOURCE's macro table that, at line number LINE in SOURCE,
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we #included the file INCLUDED. Return a source file structure we
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can use for symbols #defined or files #included into that. If we've
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already created a source file structure for this #inclusion, return
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the same structure we created last time.
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The first line of the source file has a line number of 1, not 0.
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The macro table makes its own copy of INCLUDED; the caller is
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responsible for freeing INCLUDED when it is no longer needed. */
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struct macro_source_file *macro_include (struct macro_source_file *source,
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int line,
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const char *included);
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/* Define any special macros, like __FILE__ or __LINE__. This should
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be called once, on the main source file. */
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void macro_define_special (struct macro_table *table);
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/* Find any source file structure for a file named NAME, either
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included into SOURCE, or SOURCE itself. Return zero if we have
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none. NAME is only the final portion of the filename, not the full
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path. e.g., `stdio.h', not `/usr/include/stdio.h'. If NAME
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appears more than once in the inclusion tree, return the
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least-nested inclusion --- the one closest to the main source file. */
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struct macro_source_file *macro_lookup_inclusion
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(struct macro_source_file *source,
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const char *name);
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/* Record an object-like #definition (i.e., one with no parameter list).
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Record in SOURCE's macro table that, at line number LINE in SOURCE,
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we #defined a preprocessor symbol named NAME, whose replacement
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string is REPLACEMENT. This function makes copies of NAME and
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REPLACEMENT; the caller is responsible for freeing them. */
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void macro_define_object (struct macro_source_file *source, int line,
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const char *name, const char *replacement);
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/* Record an function-like #definition (i.e., one with a parameter list).
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Record in SOURCE's macro table that, at line number LINE in SOURCE,
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we #defined a preprocessor symbol named NAME, with ARGC arguments
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whose names are given in ARGV, whose replacement string is REPLACEMENT. If
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the macro takes a variable number of arguments, then ARGC should be
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one greater than the number of named arguments, and ARGV[ARGC-1]
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should be the string "...". This function makes its own copies of
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NAME, ARGV, and REPLACEMENT; the caller is responsible for freeing
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them. */
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void macro_define_function (struct macro_source_file *source, int line,
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const char *name, int argc, const char **argv,
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const char *replacement);
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/* Record an #undefinition.
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Record in SOURCE's macro table that, at line number LINE in SOURCE,
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we removed the definition for the preprocessor symbol named NAME. */
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void macro_undef (struct macro_source_file *source, int line,
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const char *name);
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/* Different kinds of macro definitions. */
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enum macro_kind
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{
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macro_object_like,
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macro_function_like
|
|
};
|
|
|
|
/* Different kinds of special macros. */
|
|
|
|
enum macro_special_kind
|
|
{
|
|
/* Ordinary. */
|
|
macro_ordinary,
|
|
/* The special macro __FILE__. */
|
|
macro_FILE,
|
|
/* The special macro __LINE__. */
|
|
macro_LINE
|
|
};
|
|
|
|
/* A preprocessor symbol definition. */
|
|
struct macro_definition
|
|
{
|
|
/* The table this definition lives in. */
|
|
struct macro_table *table;
|
|
|
|
/* What kind of macro it is. */
|
|
ENUM_BITFIELD (macro_kind) kind : 1;
|
|
|
|
/* If `kind' is `macro_function_like', the number of arguments it
|
|
takes, and their names. The names, and the array of pointers to
|
|
them, are in the table's bcache, if it has one. If `kind' is
|
|
`macro_object_like', then this is actually a `macro_special_kind'
|
|
describing the macro. */
|
|
int argc : 30;
|
|
const char * const *argv;
|
|
|
|
/* The replacement string (body) of the macro. For ordinary macros,
|
|
this is in the table's bcache, if it has one. For special macros
|
|
like __FILE__, this value is only valid until the next use of any
|
|
special macro definition; that is, it is reset each time any
|
|
special macro is looked up or iterated over. */
|
|
const char *replacement;
|
|
};
|
|
|
|
|
|
/* Return a pointer to the macro definition for NAME in scope at line
|
|
number LINE of SOURCE. If LINE is -1, return the definition in
|
|
effect at the end of the file. The macro table owns the structure;
|
|
the caller need not free it. Return zero if NAME is not #defined
|
|
at that point. */
|
|
struct macro_definition *macro_lookup_definition
|
|
(struct macro_source_file *source,
|
|
int line, const char *name);
|
|
|
|
|
|
/* Return the source location of the definition for NAME in scope at
|
|
line number LINE of SOURCE. Set *DEFINITION_LINE to the line
|
|
number of the definition, and return a source file structure for
|
|
the file. Return zero if NAME has no definition in scope at that
|
|
point, and leave *DEFINITION_LINE unchanged. */
|
|
struct macro_source_file *macro_definition_location
|
|
(struct macro_source_file *source,
|
|
int line,
|
|
const char *name,
|
|
int *definition_line);
|
|
|
|
/* Prototype for a callback callable when walking a macro table. NAME
|
|
is the name of the macro, and DEFINITION is the definition. SOURCE
|
|
is the file at the start of the include path, and LINE is the line
|
|
number of the SOURCE file where the macro was defined. */
|
|
typedef void (macro_callback_fn) (const char *name,
|
|
const struct macro_definition *definition,
|
|
struct macro_source_file *source,
|
|
int line);
|
|
|
|
/* Call the callable FN for each macro in the macro table TABLE. */
|
|
void macro_for_each (struct macro_table *table,
|
|
gdb::function_view<macro_callback_fn> fn);
|
|
|
|
/* Call FN for each macro that is visible in a given scope. The scope
|
|
is represented by FILE and LINE. */
|
|
void macro_for_each_in_scope (struct macro_source_file *file, int line,
|
|
gdb::function_view<macro_callback_fn> fn);
|
|
|
|
/* Return FILE->filename with possibly prepended compilation directory name.
|
|
This is raw concatenation without the "set substitute-path" and gdb_realpath
|
|
applications done by symtab_to_fullname.
|
|
|
|
THis function ignores the "set filename-display" setting. Its default
|
|
setting is "relative" which is backward compatible but the former behavior
|
|
of macro filenames printing was "absolute". */
|
|
extern std::string macro_source_fullname (struct macro_source_file *file);
|
|
|
|
#endif /* MACROTAB_H */
|