mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-02 23:04:09 +08:00
b871f5ee33
In a review [1], I pointed out that applying the patch, git would say:
.git/rebase-apply/patch:147: new blank line at EOF.
However, since the empty line is in target-delegates.c (a generated
file), there's nothing the author can do about it. To avoid this
comment coming up again in the future, change make-target-delegates.py
to avoid the trailing empty line. Do this by making it output empty
lines before each entity, not after.
Since this needs removing a newline output in gdbcopyright, adjust
ada-unicode.py and gdbarch.py to avoid changes in the files they
generate.
[1] https://inbox.sourceware.org/gdb-patches/20230427210113.45380-1-jhb@FreeBSD.org/T/#m083598405bef19157f67c9d97846d3dd90dc7d1c
Change-Id: Ic4c648f06443b432168cb76603402c918aa6e5d2
Approved-By: Tom Tromey <tom@tromey.com>
395 lines
15 KiB
Python
Executable File
395 lines
15 KiB
Python
Executable File
#!/usr/bin/env python3
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# Architecture commands for GDB, the GNU debugger.
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#
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# Copyright (C) 1998-2023 Free Software Foundation, Inc.
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#
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# This file is part of GDB.
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#
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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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#
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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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#
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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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import textwrap
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# gdbarch_components is imported only for its side-effect of filling
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# `gdbarch_types.components`.
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import gdbarch_components # noqa: F401 # type: ignore
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import gdbcopyright
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from gdbarch_types import Component, Function, Info, Value, components
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def indentation(n_columns: int):
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"""Return string with tabs and spaces to indent line to N_COLUMNS."""
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return "\t" * (n_columns // 8) + " " * (n_columns % 8)
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copyright = gdbcopyright.copyright(
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"gdbarch.py", "Dynamic architecture support for GDB, the GNU debugger."
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)
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def info(c: Component):
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"Filter function to only allow Info components."
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return type(c) is Info
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def not_info(c: Component):
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"Filter function to omit Info components."
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return type(c) is not Info
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with open("gdbarch-gen.h", "w") as f:
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print(copyright, file=f)
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print(file=f)
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print(file=f)
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print(file=f)
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print("/* The following are pre-initialized by GDBARCH. */", file=f)
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# Do Info components first.
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for c in filter(info, components):
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print(file=f)
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print(
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f"""extern {c.type} gdbarch_{c.name} (struct gdbarch *gdbarch);
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/* set_gdbarch_{c.name}() - not applicable - pre-initialized. */""",
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file=f,
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)
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print(file=f)
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print(file=f)
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print("/* The following are initialized by the target dependent code. */", file=f)
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# Generate decls for accessors, setters, and predicates for all
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# non-Info components.
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for c in filter(not_info, components):
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if c.comment:
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print(file=f)
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comment = c.comment.split("\n")
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if comment[0] == "":
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comment = comment[1:]
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if comment[-1] == "":
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comment = comment[:-1]
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print("/* ", file=f, end="")
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print(comment[0], file=f, end="")
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if len(comment) > 1:
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print(file=f)
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print(
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textwrap.indent("\n".join(comment[1:]), prefix=" "),
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end="",
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file=f,
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)
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print(" */", file=f)
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if c.predicate:
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print(file=f)
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print(f"extern bool gdbarch_{c.name}_p (struct gdbarch *gdbarch);", file=f)
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print(file=f)
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if isinstance(c, Value):
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print(
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f"extern {c.type} gdbarch_{c.name} (struct gdbarch *gdbarch);",
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file=f,
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)
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print(
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f"extern void set_gdbarch_{c.name} (struct gdbarch *gdbarch, {c.type} {c.name});",
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file=f,
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)
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else:
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assert isinstance(c, Function)
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print(
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f"typedef {c.type} ({c.ftype()}) ({c.param_list()});",
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file=f,
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)
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if c.implement:
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print(
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f"extern {c.type} gdbarch_{c.name} ({c.set_list()});",
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file=f,
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)
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print(
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f"extern void set_gdbarch_{c.name} (struct gdbarch *gdbarch, {c.ftype()} *{c.name});",
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file=f,
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)
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with open("gdbarch.c", "w") as f:
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print(copyright, file=f)
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print(file=f)
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print(file=f)
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print("/* Maintain the struct gdbarch object. */", file=f)
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print(file=f)
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#
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# The struct definition body.
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#
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print("struct gdbarch", file=f)
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print("{", file=f)
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print(" /* Has this architecture been fully initialized? */", file=f)
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print(" bool initialized_p = false;", file=f)
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print(file=f)
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print(" /* An obstack bound to the lifetime of the architecture. */", file=f)
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print(" auto_obstack obstack;", file=f)
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print(" /* Registry. */", file=f)
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print(" registry<gdbarch> registry_fields;", file=f)
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print(file=f)
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print(" /* basic architectural information. */", file=f)
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for c in filter(info, components):
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print(f" {c.type} {c.name};", file=f)
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print(file=f)
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print(" /* target specific vector. */", file=f)
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print(" gdbarch_tdep_up tdep;", file=f)
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print(" gdbarch_dump_tdep_ftype *dump_tdep = nullptr;", file=f)
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print(file=f)
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for c in filter(not_info, components):
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if isinstance(c, Function):
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print(f" gdbarch_{c.name}_ftype *", file=f, end="")
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else:
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print(f" {c.type} ", file=f, end="")
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print(f"{c.name} = ", file=f, end="")
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if c.predefault is not None:
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print(f"{c.predefault};", file=f)
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elif isinstance(c, Value):
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print("0;", file=f)
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else:
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assert isinstance(c, Function)
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print("nullptr;", file=f)
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print("};", file=f)
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print(file=f)
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#
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# Initialization.
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#
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print("/* Create a new ``struct gdbarch'' based on information provided by", file=f)
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print(" ``struct gdbarch_info''. */", file=f)
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print(file=f)
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print("struct gdbarch *", file=f)
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print("gdbarch_alloc (const struct gdbarch_info *info,", file=f)
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print(" gdbarch_tdep_up tdep)", file=f)
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print("{", file=f)
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print(" struct gdbarch *gdbarch;", file=f)
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print("", file=f)
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print(" gdbarch = new struct gdbarch;", file=f)
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print(file=f)
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print(" gdbarch->tdep = std::move (tdep);", file=f)
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print(file=f)
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for c in filter(info, components):
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print(f" gdbarch->{c.name} = info->{c.name};", file=f)
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print(file=f)
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print(" return gdbarch;", file=f)
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print("}", file=f)
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print(file=f)
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print(file=f)
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print(file=f)
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#
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# Post-initialization validation and updating
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#
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print("/* Ensure that all values in a GDBARCH are reasonable. */", file=f)
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print(file=f)
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print("static void", file=f)
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print("verify_gdbarch (struct gdbarch *gdbarch)", file=f)
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print("{", file=f)
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print(" string_file log;", file=f)
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print(file=f)
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print(" /* fundamental */", file=f)
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print(" if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)", file=f)
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print(""" log.puts ("\\n\\tbyte-order");""", file=f)
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print(" if (gdbarch->bfd_arch_info == NULL)", file=f)
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print(""" log.puts ("\\n\\tbfd_arch_info");""", file=f)
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print(
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" /* Check those that need to be defined for the given multi-arch level. */",
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file=f,
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)
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for c in filter(not_info, components):
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# An opportunity to write in the 'postdefault' value. We
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# change field's value to the postdefault if its current value
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# is not different to the initial value of the field.
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if c.postdefault is not None:
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init_value = c.predefault or "0"
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print(f" if (gdbarch->{c.name} == {init_value})", file=f)
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print(f" gdbarch->{c.name} = {c.postdefault};", file=f)
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# Now validate the value.
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if isinstance(c.invalid, str):
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print(f" if ({c.invalid})", file=f)
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print(f""" log.puts ("\\n\\t{c.name}");""", file=f)
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elif c.predicate:
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print(f" /* Skip verify of {c.name}, has predicate. */", file=f)
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elif c.invalid:
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if c.postdefault is not None:
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# This component has its 'invalid' field set to True, but
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# also has a postdefault. This makes no sense, the
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# postdefault will have been applied above, so this field
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# will not have a zero value.
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raise Exception(
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f"component {c.name} has postdefault and invalid set to True"
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)
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else:
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init_value = c.predefault or "0"
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print(f" if (gdbarch->{c.name} == {init_value})", file=f)
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print(f""" log.puts ("\\n\\t{c.name}");""", file=f)
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else:
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print(f" /* Skip verify of {c.name}, invalid_p == 0 */", file=f)
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print(" if (!log.empty ())", file=f)
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print(
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""" internal_error (_("verify_gdbarch: the following are invalid ...%s"),""",
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file=f,
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)
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print(" log.c_str ());", file=f)
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print("}", file=f)
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print(file=f)
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print(file=f)
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#
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# Dumping.
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#
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print("/* Print out the details of the current architecture. */", file=f)
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print(file=f)
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print("void", file=f)
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print("gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)", file=f)
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print("{", file=f)
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print(""" const char *gdb_nm_file = "<not-defined>";""", file=f)
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print(file=f)
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print("#if defined (GDB_NM_FILE)", file=f)
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print(" gdb_nm_file = GDB_NM_FILE;", file=f)
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print("#endif", file=f)
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print(" gdb_printf (file,", file=f)
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print(""" "gdbarch_dump: GDB_NM_FILE = %s\\n",""", file=f)
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print(" gdb_nm_file);", file=f)
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for c in components:
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if c.predicate:
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print(" gdb_printf (file,", file=f)
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print(
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f""" "gdbarch_dump: gdbarch_{c.name}_p() = %d\\n",""",
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file=f,
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)
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print(f" gdbarch_{c.name}_p (gdbarch));", file=f)
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if isinstance(c, Function):
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print(" gdb_printf (file,", file=f)
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print(f""" "gdbarch_dump: {c.name} = <%s>\\n",""", file=f)
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print(
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f" host_address_to_string (gdbarch->{c.name}));",
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file=f,
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)
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else:
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if c.printer:
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printer = c.printer
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elif c.type == "CORE_ADDR":
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printer = f"core_addr_to_string_nz (gdbarch->{c.name})"
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else:
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printer = f"plongest (gdbarch->{c.name})"
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print(" gdb_printf (file,", file=f)
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print(f""" "gdbarch_dump: {c.name} = %s\\n",""", file=f)
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print(f" {printer});", file=f)
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print(" if (gdbarch->dump_tdep != NULL)", file=f)
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print(" gdbarch->dump_tdep (gdbarch, file);", file=f)
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print("}", file=f)
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print(file=f)
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#
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# Bodies of setter, accessor, and predicate functions.
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#
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for c in components:
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if c.predicate:
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print(file=f)
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print("bool", file=f)
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print(f"gdbarch_{c.name}_p (struct gdbarch *gdbarch)", file=f)
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print("{", file=f)
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print(" gdb_assert (gdbarch != NULL);", file=f)
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print(f" return {c.get_predicate()};", file=f)
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print("}", file=f)
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if isinstance(c, Function):
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if c.implement:
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print(file=f)
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print(f"{c.type}", file=f)
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print(f"gdbarch_{c.name} ({c.set_list()})", file=f)
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print("{", file=f)
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print(" gdb_assert (gdbarch != NULL);", file=f)
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print(f" gdb_assert (gdbarch->{c.name} != NULL);", file=f)
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if c.predicate and c.predefault:
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# Allow a call to a function with a predicate.
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print(
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f" /* Do not check predicate: {c.get_predicate()}, allow call. */",
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file=f,
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)
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if c.param_checks:
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for rule in c.param_checks:
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print(f" gdb_assert ({rule});", file=f)
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print(" if (gdbarch_debug >= 2)", file=f)
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print(
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f""" gdb_printf (gdb_stdlog, "gdbarch_{c.name} called\\n");""",
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file=f,
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)
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print(" ", file=f, end="")
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if c.type != "void":
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if c.result_checks:
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print("auto result = ", file=f, end="")
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else:
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print("return ", file=f, end="")
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print(f"gdbarch->{c.name} ({c.actuals()});", file=f)
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if c.type != "void" and c.result_checks:
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for rule in c.result_checks:
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print(f" gdb_assert ({rule});", file=f)
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print(" return result;", file=f)
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print("}", file=f)
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print(file=f)
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print("void", file=f)
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setter_name = f"set_gdbarch_{c.name}"
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ftype_name = f"gdbarch_{c.name}_ftype"
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print(f"{setter_name} (struct gdbarch *gdbarch,", file=f)
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indent_columns = len(f"{setter_name} (")
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print(f"{indentation(indent_columns)}{ftype_name} {c.name})", file=f)
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print("{", file=f)
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print(f" gdbarch->{c.name} = {c.name};", file=f)
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print("}", file=f)
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elif isinstance(c, Value):
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print(file=f)
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print(f"{c.type}", file=f)
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print(f"gdbarch_{c.name} (struct gdbarch *gdbarch)", file=f)
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print("{", file=f)
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print(" gdb_assert (gdbarch != NULL);", file=f)
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if isinstance(c.invalid, str):
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print(" /* Check variable is valid. */", file=f)
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print(f" gdb_assert (!({c.invalid}));", file=f)
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elif c.predicate:
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print(" /* Check predicate was used. */", file=f)
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print(f" gdb_assert (gdbarch_{c.name}_p (gdbarch));", file=f)
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elif c.invalid or c.postdefault is not None:
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init_value = c.predefault or "0"
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print(" /* Check variable changed from its initial value. */", file=f)
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print(f" gdb_assert (gdbarch->{c.name} != {init_value});", file=f)
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else:
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print(f" /* Skip verify of {c.name}, invalid_p == 0 */", file=f)
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print(" if (gdbarch_debug >= 2)", file=f)
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print(
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f""" gdb_printf (gdb_stdlog, "gdbarch_{c.name} called\\n");""",
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file=f,
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)
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print(f" return gdbarch->{c.name};", file=f)
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print("}", file=f)
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print(file=f)
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print("void", file=f)
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setter_name = f"set_gdbarch_{c.name}"
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print(f"{setter_name} (struct gdbarch *gdbarch,", file=f)
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indent_columns = len(f"{setter_name} (")
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print(f"{indentation(indent_columns)}{c.type} {c.name})", file=f)
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print("{", file=f)
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print(f" gdbarch->{c.name} = {c.name};", file=f)
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print("}", file=f)
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else:
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assert isinstance(c, Info)
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print(file=f)
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print(f"{c.type}", file=f)
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print(f"gdbarch_{c.name} (struct gdbarch *gdbarch)", file=f)
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print("{", file=f)
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print(" gdb_assert (gdbarch != NULL);", file=f)
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print(" if (gdbarch_debug >= 2)", file=f)
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print(
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f""" gdb_printf (gdb_stdlog, "gdbarch_{c.name} called\\n");""",
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file=f,
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)
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print(f" return gdbarch->{c.name};", file=f)
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print("}", file=f)
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