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4de283e4b5
Andreas Schwab and John Baldwin pointed out some bugs in the header sorting patch; and I noticed that the output was not correct when limited to a subset of files (a bug in my script). So, I'm reverting the patch. I may try again after fixing the issues pointed out. gdb/ChangeLog 2019-04-05 Tom Tromey <tom@tromey.com> Revert the header-sorting patch. * ft32-tdep.c: Revert. * frv-tdep.c: Revert. * frv-linux-tdep.c: Revert. * frame.c: Revert. * frame-unwind.c: Revert. * frame-base.c: Revert. * fork-child.c: Revert. * findvar.c: Revert. * findcmd.c: Revert. * filesystem.c: Revert. * filename-seen-cache.h: Revert. * filename-seen-cache.c: Revert. * fbsd-tdep.c: Revert. * fbsd-nat.h: Revert. * fbsd-nat.c: Revert. * f-valprint.c: Revert. * f-typeprint.c: Revert. * f-lang.c: Revert. * extension.h: Revert. * extension.c: Revert. * extension-priv.h: Revert. * expprint.c: Revert. * exec.h: Revert. * exec.c: Revert. * exceptions.c: Revert. * event-top.c: Revert. * event-loop.c: Revert. * eval.c: Revert. * elfread.c: Revert. * dwarf2read.h: Revert. * dwarf2read.c: Revert. * dwarf2loc.c: Revert. * dwarf2expr.h: Revert. * dwarf2expr.c: Revert. * dwarf2-frame.c: Revert. * dwarf2-frame-tailcall.c: Revert. * dwarf-index-write.h: Revert. * dwarf-index-write.c: Revert. * dwarf-index-common.c: Revert. * dwarf-index-cache.h: Revert. * dwarf-index-cache.c: Revert. * dummy-frame.c: Revert. * dtrace-probe.c: Revert. * disasm.h: Revert. * disasm.c: Revert. * disasm-selftests.c: Revert. * dictionary.c: Revert. * dicos-tdep.c: Revert. * demangle.c: Revert. * dcache.h: Revert. * dcache.c: Revert. * darwin-nat.h: Revert. * darwin-nat.c: Revert. * darwin-nat-info.c: Revert. * d-valprint.c: Revert. * d-namespace.c: Revert. * d-lang.c: Revert. * ctf.c: Revert. * csky-tdep.c: Revert. * csky-linux-tdep.c: Revert. * cris-tdep.c: Revert. * cris-linux-tdep.c: Revert. * cp-valprint.c: Revert. * cp-support.c: Revert. * cp-namespace.c: Revert. * cp-abi.c: Revert. * corelow.c: Revert. * corefile.c: Revert. * continuations.c: Revert. * completer.h: Revert. * completer.c: Revert. * complaints.c: Revert. * coffread.c: Revert. * coff-pe-read.c: Revert. * cli-out.h: Revert. * cli-out.c: Revert. * charset.c: Revert. * c-varobj.c: Revert. * c-valprint.c: Revert. * c-typeprint.c: Revert. * c-lang.c: Revert. * buildsym.c: Revert. * buildsym-legacy.c: Revert. * build-id.h: Revert. * build-id.c: Revert. * btrace.c: Revert. * bsd-uthread.c: Revert. * breakpoint.h: Revert. * breakpoint.c: Revert. * break-catch-throw.c: Revert. * break-catch-syscall.c: Revert. * break-catch-sig.c: Revert. * blockframe.c: Revert. * block.c: Revert. * bfin-tdep.c: Revert. * bfin-linux-tdep.c: Revert. * bfd-target.c: Revert. * bcache.c: Revert. * ax-general.c: Revert. * ax-gdb.h: Revert. * ax-gdb.c: Revert. * avr-tdep.c: Revert. * auxv.c: Revert. * auto-load.c: Revert. * arm-wince-tdep.c: Revert. * arm-tdep.c: Revert. * arm-symbian-tdep.c: Revert. * arm-pikeos-tdep.c: Revert. * arm-obsd-tdep.c: Revert. * arm-nbsd-tdep.c: Revert. * arm-nbsd-nat.c: Revert. * arm-linux-tdep.c: Revert. * arm-linux-nat.c: Revert. * arm-fbsd-tdep.c: Revert. * arm-fbsd-nat.c: Revert. * arm-bsd-tdep.c: Revert. * arch-utils.c: Revert. * arc-tdep.c: Revert. * arc-newlib-tdep.c: Revert. * annotate.h: Revert. * annotate.c: Revert. * amd64-windows-tdep.c: Revert. * amd64-windows-nat.c: Revert. * amd64-tdep.c: Revert. * amd64-sol2-tdep.c: Revert. * amd64-obsd-tdep.c: Revert. * amd64-obsd-nat.c: Revert. * amd64-nbsd-tdep.c: Revert. * amd64-nbsd-nat.c: Revert. * amd64-nat.c: Revert. * amd64-linux-tdep.c: Revert. * amd64-linux-nat.c: Revert. * amd64-fbsd-tdep.c: Revert. * amd64-fbsd-nat.c: Revert. * amd64-dicos-tdep.c: Revert. * amd64-darwin-tdep.c: Revert. * amd64-bsd-nat.c: Revert. * alpha-tdep.c: Revert. * alpha-obsd-tdep.c: Revert. * alpha-nbsd-tdep.c: Revert. * alpha-mdebug-tdep.c: Revert. * alpha-linux-tdep.c: Revert. * alpha-linux-nat.c: Revert. * alpha-bsd-tdep.c: Revert. * alpha-bsd-nat.c: Revert. * aix-thread.c: Revert. * agent.c: Revert. * addrmap.c: Revert. * ada-varobj.c: Revert. * ada-valprint.c: Revert. * ada-typeprint.c: Revert. * ada-tasks.c: Revert. * ada-lang.c: Revert. * aarch64-tdep.c: Revert. * aarch64-ravenscar-thread.c: Revert. * aarch64-newlib-tdep.c: Revert. * aarch64-linux-tdep.c: Revert. * aarch64-linux-nat.c: Revert. * aarch64-fbsd-tdep.c: Revert. * aarch64-fbsd-nat.c: Revert. * aarch32-linux-nat.c: Revert.
128 lines
4.7 KiB
C
128 lines
4.7 KiB
C
/* GDB-specific functions for operating on agent expressions
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Copyright (C) 1998-2019 Free Software Foundation, 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 AX_GDB_H
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#define AX_GDB_H
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#include "ax.h" /* For agent_expr_up. */
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struct expression;
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union exp_element;
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/* Types and enums */
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/* GDB stores expressions in the form of a flattened tree (struct
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expression), so we just walk that tree and generate agent bytecodes
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as we go along.
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GDB's normal evaluation uses struct value, which contains the
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expression's value as well as its address or the register it came
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from. The `+' operator uses the value, whereas the unary `&'
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operator will use the address portion. The `=' operator will use
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the address or register number of its left hand side.
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The issues are different when generating agent bytecode. Given a
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variable reference expression, we should not necessarily generate
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code to fetch its value, because the next operator may be `=' or
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unary `&'. Instead, when we recurse on a subexpression, we
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indicate whether we want that expression to produce an lvalue or an
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rvalue. If we requested an lvalue, then the recursive call tells
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us whether it generated code to compute an address on the stack, or
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whether the lvalue lives in a register.
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The `axs' prefix here means `agent expression, static', because
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this is all static analysis of the expression, i.e. analysis which
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doesn't depend on the contents of memory and registers. */
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/* Different kinds of agent expression static values. */
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enum axs_lvalue_kind
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{
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/* We generated code to compute the subexpression's value.
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Constants and arithmetic operators yield this. */
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axs_rvalue,
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/* We generated code to yield the subexpression's value's address on
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the top of the stack. If the caller needs an rvalue, it should
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call require_rvalue to produce the rvalue from this address. */
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axs_lvalue_memory,
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/* We didn't generate any code, and the stack is undisturbed,
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because the subexpression's value lives in a register; u.reg is
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the register number. If the caller needs an rvalue, it should
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call require_rvalue to produce the rvalue from this register
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number. */
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axs_lvalue_register
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};
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/* Structure describing what we got from a subexpression. Think of
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this as parallel to value.h's enum lval_type, except that we're
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describing a value which will exist when the expression is
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evaluated in the future, not a value we have in our hand. */
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struct axs_value
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{
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enum axs_lvalue_kind kind; /* see above */
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/* The type of the subexpression. Even if lvalue == axs_lvalue_memory,
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this is the type of the value itself; the value on the stack is a
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"pointer to" an object of this type. */
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struct type *type;
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/* If nonzero, this is a variable which does not actually exist in
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the program. */
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char optimized_out;
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union
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{
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/* if kind == axs_lvalue_register, this is the register number */
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int reg;
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}
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u;
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};
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/* Translating GDB expressions into agent expressions. */
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/* Given a GDB expression EXPR, return bytecode to trace its value.
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The result will use the `trace' and `trace_quick' bytecodes to
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record the value of all memory touched by the expression, and leave
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no values on the stack. The caller can then use the ax_reqs
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function to discover which registers the expression uses. */
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extern agent_expr_up gen_trace_for_expr (CORE_ADDR, struct expression *,
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int);
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extern agent_expr_up gen_trace_for_var (CORE_ADDR, struct gdbarch *,
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struct symbol *, int);
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extern agent_expr_up gen_trace_for_return_address (CORE_ADDR,
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struct gdbarch *,
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int);
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extern agent_expr_up gen_eval_for_expr (CORE_ADDR, struct expression *);
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extern void gen_expr (struct expression *exp, union exp_element **pc,
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struct agent_expr *ax, struct axs_value *value);
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extern void require_rvalue (struct agent_expr *ax, struct axs_value *value);
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extern agent_expr_up gen_printf (CORE_ADDR, struct gdbarch *,
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CORE_ADDR, LONGEST, const char *, int,
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int, struct expression **);
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#endif /* AX_GDB_H */
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