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This commit applies all changes made after running the gdb/copyright.py script. Note that one file was flagged by the script, due to an invalid copyright header (gdb/unittests/basic_string_view/element_access/char/empty.cc). As the file was copied from GCC's libstdc++-v3 testsuite, this commit leaves this file untouched for the time being; a patch to fix the header was sent to gcc-patches first. gdb/ChangeLog: Update copyright year range in all GDB files.
885 lines
35 KiB
C++
885 lines
35 KiB
C++
/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
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Copyright (C) 1986-2019 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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#if !defined (FRAME_H)
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#define FRAME_H 1
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/* The following is the intended naming schema for frame functions.
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It isn't 100% consistent, but it is aproaching that. Frame naming
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schema:
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Prefixes:
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get_frame_WHAT...(): Get WHAT from the THIS frame (functionally
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equivalent to THIS->next->unwind->what)
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frame_unwind_WHAT...(): Unwind THIS frame's WHAT from the NEXT
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frame.
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frame_unwind_caller_WHAT...(): Unwind WHAT for NEXT stack frame's
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real caller. Any inlined functions in NEXT's stack frame are
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skipped. Use these to ignore any potentially inlined functions,
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e.g. inlined into the first instruction of a library trampoline.
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get_stack_frame_WHAT...(): Get WHAT for THIS frame, but if THIS is
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inlined, skip to the containing stack frame.
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put_frame_WHAT...(): Put a value into this frame (unsafe, need to
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invalidate the frame / regcache afterwards) (better name more
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strongly hinting at its unsafeness)
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safe_....(): Safer version of various functions, doesn't throw an
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error (leave this for later?). Returns non-zero / non-NULL if the
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request succeeds, zero / NULL otherwize.
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Suffixes:
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void /frame/_WHAT(): Read WHAT's value into the buffer parameter.
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ULONGEST /frame/_WHAT_unsigned(): Return an unsigned value (the
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alternative is *frame_unsigned_WHAT).
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LONGEST /frame/_WHAT_signed(): Return WHAT signed value.
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What:
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/frame/_memory* (frame, coreaddr, len [, buf]): Extract/return
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*memory.
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/frame/_register* (frame, regnum [, buf]): extract/return register.
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CORE_ADDR /frame/_{pc,sp,...} (frame): Resume address, innner most
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stack *address, ...
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*/
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#include "language.h"
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struct symtab_and_line;
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struct frame_unwind;
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struct frame_base;
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struct block;
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struct gdbarch;
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struct ui_file;
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struct ui_out;
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/* Status of a given frame's stack. */
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enum frame_id_stack_status
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{
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/* Stack address is invalid. E.g., this frame is the outermost
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(i.e., _start), and the stack hasn't been setup yet. */
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FID_STACK_INVALID = 0,
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/* Stack address is valid, and is found in the stack_addr field. */
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FID_STACK_VALID = 1,
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/* Sentinel frame. */
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FID_STACK_SENTINEL = 2,
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/* Stack address is unavailable. I.e., there's a valid stack, but
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we don't know where it is (because memory or registers we'd
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compute it from were not collected). */
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FID_STACK_UNAVAILABLE = -1
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};
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/* The frame object. */
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struct frame_info;
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/* The frame object's ID. This provides a per-frame unique identifier
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that can be used to relocate a `struct frame_info' after a target
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resume or a frame cache destruct. It of course assumes that the
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inferior hasn't unwound the stack past that frame. */
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struct frame_id
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{
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/* The frame's stack address. This shall be constant through out
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the lifetime of a frame. Note that this requirement applies to
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not just the function body, but also the prologue and (in theory
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at least) the epilogue. Since that value needs to fall either on
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the boundary, or within the frame's address range, the frame's
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outer-most address (the inner-most address of the previous frame)
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is used. Watch out for all the legacy targets that still use the
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function pointer register or stack pointer register. They are
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wrong.
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This field is valid only if frame_id.stack_status is
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FID_STACK_VALID. It will be 0 for other
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FID_STACK_... statuses. */
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CORE_ADDR stack_addr;
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/* The frame's code address. This shall be constant through out the
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lifetime of the frame. While the PC (a.k.a. resume address)
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changes as the function is executed, this code address cannot.
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Typically, it is set to the address of the entry point of the
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frame's function (as returned by get_frame_func).
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For inlined functions (INLINE_DEPTH != 0), this is the address of
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the first executed instruction in the block corresponding to the
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inlined function.
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This field is valid only if code_addr_p is true. Otherwise, this
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frame is considered to have a wildcard code address, i.e. one that
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matches every address value in frame comparisons. */
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CORE_ADDR code_addr;
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/* The frame's special address. This shall be constant through out the
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lifetime of the frame. This is used for architectures that may have
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frames that do not change the stack but are still distinct and have
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some form of distinct identifier (e.g. the ia64 which uses a 2nd
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stack for registers). This field is treated as unordered - i.e. will
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not be used in frame ordering comparisons.
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This field is valid only if special_addr_p is true. Otherwise, this
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frame is considered to have a wildcard special address, i.e. one that
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matches every address value in frame comparisons. */
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CORE_ADDR special_addr;
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/* Flags to indicate the above fields have valid contents. */
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ENUM_BITFIELD(frame_id_stack_status) stack_status : 3;
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unsigned int code_addr_p : 1;
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unsigned int special_addr_p : 1;
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/* It is non-zero for a frame made up by GDB without stack data
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representation in inferior, such as INLINE_FRAME or TAILCALL_FRAME.
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Caller of inlined function will have it zero, each more inner called frame
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will have it increasingly one, two etc. Similarly for TAILCALL_FRAME. */
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int artificial_depth;
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};
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/* Save and restore the currently selected frame. */
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class scoped_restore_selected_frame
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{
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public:
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/* Save the currently selected frame. */
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scoped_restore_selected_frame ();
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/* Restore the currently selected frame. */
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~scoped_restore_selected_frame ();
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DISABLE_COPY_AND_ASSIGN (scoped_restore_selected_frame);
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private:
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/* The ID of the previously selected frame. */
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struct frame_id m_fid;
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};
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/* Methods for constructing and comparing Frame IDs. */
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/* For convenience. All fields are zero. This means "there is no frame". */
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extern const struct frame_id null_frame_id;
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/* Sentinel frame. */
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extern const struct frame_id sentinel_frame_id;
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/* This means "there is no frame ID, but there is a frame". It should be
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replaced by best-effort frame IDs for the outermost frame, somehow.
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The implementation is only special_addr_p set. */
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extern const struct frame_id outer_frame_id;
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/* Flag to control debugging. */
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extern unsigned int frame_debug;
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/* Construct a frame ID. The first parameter is the frame's constant
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stack address (typically the outer-bound), and the second the
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frame's constant code address (typically the entry point).
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The special identifier address is set to indicate a wild card. */
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extern struct frame_id frame_id_build (CORE_ADDR stack_addr,
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CORE_ADDR code_addr);
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/* Construct a special frame ID. The first parameter is the frame's constant
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stack address (typically the outer-bound), the second is the
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frame's constant code address (typically the entry point),
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and the third parameter is the frame's special identifier address. */
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extern struct frame_id frame_id_build_special (CORE_ADDR stack_addr,
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CORE_ADDR code_addr,
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CORE_ADDR special_addr);
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/* Construct a frame ID representing a frame where the stack address
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exists, but is unavailable. CODE_ADDR is the frame's constant code
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address (typically the entry point). The special identifier
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address is set to indicate a wild card. */
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extern struct frame_id frame_id_build_unavailable_stack (CORE_ADDR code_addr);
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/* Construct a frame ID representing a frame where the stack address
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exists, but is unavailable. CODE_ADDR is the frame's constant code
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address (typically the entry point). SPECIAL_ADDR is the special
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identifier address. */
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extern struct frame_id
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frame_id_build_unavailable_stack_special (CORE_ADDR code_addr,
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CORE_ADDR special_addr);
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/* Construct a wild card frame ID. The parameter is the frame's constant
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stack address (typically the outer-bound). The code address as well
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as the special identifier address are set to indicate wild cards. */
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extern struct frame_id frame_id_build_wild (CORE_ADDR stack_addr);
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/* Returns non-zero when L is a valid frame (a valid frame has a
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non-zero .base). The outermost frame is valid even without an
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ID. */
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extern int frame_id_p (struct frame_id l);
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/* Returns non-zero when L is a valid frame representing a frame made up by GDB
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without stack data representation in inferior, such as INLINE_FRAME or
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TAILCALL_FRAME. */
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extern int frame_id_artificial_p (struct frame_id l);
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/* Returns non-zero when L and R identify the same frame, or, if
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either L or R have a zero .func, then the same frame base. */
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extern int frame_id_eq (struct frame_id l, struct frame_id r);
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/* Write the internal representation of a frame ID on the specified
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stream. */
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extern void fprint_frame_id (struct ui_file *file, struct frame_id id);
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/* Frame types. Some are real, some are signal trampolines, and some
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are completely artificial (dummy). */
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enum frame_type
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{
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/* A true stack frame, created by the target program during normal
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execution. */
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NORMAL_FRAME,
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/* A fake frame, created by GDB when performing an inferior function
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call. */
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DUMMY_FRAME,
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/* A frame representing an inlined function, associated with an
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upcoming (prev, outer, older) NORMAL_FRAME. */
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INLINE_FRAME,
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/* A virtual frame of a tail call - see dwarf2_tailcall_frame_unwind. */
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TAILCALL_FRAME,
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/* In a signal handler, various OSs handle this in various ways.
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The main thing is that the frame may be far from normal. */
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SIGTRAMP_FRAME,
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/* Fake frame representing a cross-architecture call. */
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ARCH_FRAME,
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/* Sentinel or registers frame. This frame obtains register values
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direct from the inferior's registers. */
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SENTINEL_FRAME
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};
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/* For every stopped thread, GDB tracks two frames: current and
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selected. Current frame is the inner most frame of the selected
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thread. Selected frame is the one being examined by the GDB
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CLI (selected using `up', `down', ...). The frames are created
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on-demand (via get_prev_frame()) and then held in a frame cache. */
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/* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
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sequence: `thread 1; up; thread 2; thread 1' you lose thread 1's
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selected frame. At present GDB only tracks the selected frame of
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the current thread. But be warned, that might change. */
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/* FIXME: cagney/2002-11-14: At any time, only one thread's selected
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and current frame can be active. Switching threads causes gdb to
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discard all that cached frame information. Ulgh! Instead, current
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and selected frame should be bound to a thread. */
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/* On demand, create the inner most frame using information found in
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the inferior. If the inner most frame can't be created, throw an
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error. */
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extern struct frame_info *get_current_frame (void);
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/* Does the current target interface have enough state to be able to
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query the current inferior for frame info, and is the inferior in a
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state where that is possible? */
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extern int has_stack_frames (void);
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/* Invalidates the frame cache (this function should have been called
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invalidate_cached_frames).
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FIXME: cagney/2002-11-28: There should be two methods: one that
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reverts the thread's selected frame back to current frame (for when
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the inferior resumes) and one that does not (for when the user
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modifies the target invalidating the frame cache). */
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extern void reinit_frame_cache (void);
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/* On demand, create the selected frame and then return it. If the
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selected frame can not be created, this function prints then throws
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an error. When MESSAGE is non-NULL, use it for the error message,
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otherwize use a generic error message. */
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/* FIXME: cagney/2002-11-28: At present, when there is no selected
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frame, this function always returns the current (inner most) frame.
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It should instead, when a thread has previously had its frame
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selected (but not resumed) and the frame cache invalidated, find
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and then return that thread's previously selected frame. */
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extern struct frame_info *get_selected_frame (const char *message);
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/* If there is a selected frame, return it. Otherwise, return NULL. */
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extern struct frame_info *get_selected_frame_if_set (void);
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/* Select a specific frame. NULL, apparently implies re-select the
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inner most frame. */
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extern void select_frame (struct frame_info *);
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/* Given a FRAME, return the next (more inner, younger) or previous
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(more outer, older) frame. */
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extern struct frame_info *get_prev_frame (struct frame_info *);
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extern struct frame_info *get_next_frame (struct frame_info *);
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/* Like get_next_frame(), but allows return of the sentinel frame. NULL
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is never returned. */
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extern struct frame_info *get_next_frame_sentinel_okay (struct frame_info *);
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/* Return a "struct frame_info" corresponding to the frame that called
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THIS_FRAME. Returns NULL if there is no such frame.
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Unlike get_prev_frame, this function always tries to unwind the
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frame. */
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extern struct frame_info *get_prev_frame_always (struct frame_info *);
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/* Given a frame's ID, relocate the frame. Returns NULL if the frame
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is not found. */
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extern struct frame_info *frame_find_by_id (struct frame_id id);
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/* Given a frame's ID, find the previous frame's ID. Returns null_frame_id
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if the frame is not found. */
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extern struct frame_id get_prev_frame_id_by_id (struct frame_id id);
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/* Base attributes of a frame: */
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/* The frame's `resume' address. Where the program will resume in
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this frame.
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This replaced: frame->pc; */
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extern CORE_ADDR get_frame_pc (struct frame_info *);
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/* Same as get_frame_pc, but return a boolean indication of whether
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the PC is actually available, instead of throwing an error. */
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extern int get_frame_pc_if_available (struct frame_info *frame,
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CORE_ADDR *pc);
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/* An address (not necessarily aligned to an instruction boundary)
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that falls within THIS frame's code block.
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When a function call is the last statement in a block, the return
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address for the call may land at the start of the next block.
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Similarly, if a no-return function call is the last statement in
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the function, the return address may end up pointing beyond the
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function, and possibly at the start of the next function.
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These methods make an allowance for this. For call frames, this
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function returns the frame's PC-1 which "should" be an address in
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the frame's block. */
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extern CORE_ADDR get_frame_address_in_block (struct frame_info *this_frame);
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/* Same as get_frame_address_in_block, but returns a boolean
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indication of whether the frame address is determinable (when the
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PC is unavailable, it will not be), instead of possibly throwing an
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error trying to read an unavailable PC. */
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extern int
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get_frame_address_in_block_if_available (struct frame_info *this_frame,
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CORE_ADDR *pc);
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/* The frame's inner-most bound. AKA the stack-pointer. Confusingly
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known as top-of-stack. */
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extern CORE_ADDR get_frame_sp (struct frame_info *);
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/* Following on from the `resume' address. Return the entry point
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address of the function containing that resume address, or zero if
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that function isn't known. */
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extern CORE_ADDR get_frame_func (struct frame_info *fi);
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/* Same as get_frame_func, but returns a boolean indication of whether
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the frame function is determinable (when the PC is unavailable, it
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will not be), instead of possibly throwing an error trying to read
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an unavailable PC. */
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extern int get_frame_func_if_available (struct frame_info *fi, CORE_ADDR *);
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/* Closely related to the resume address, various symbol table
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attributes that are determined by the PC. Note that for a normal
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frame, the PC refers to the resume address after the return, and
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not the call instruction. In such a case, the address is adjusted
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so that it (approximately) identifies the call site (and not the
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return site).
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NOTE: cagney/2002-11-28: The frame cache could be used to cache the
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computed value. Working on the assumption that the bottle-neck is
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in the single step code, and that code causes the frame cache to be
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constantly flushed, caching things in a frame is probably of little
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benefit. As they say `show us the numbers'.
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NOTE: cagney/2002-11-28: Plenty more where this one came from:
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find_frame_block(), find_frame_partial_function(),
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find_frame_symtab(), find_frame_function(). Each will need to be
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carefully considered to determine if the real intent was for it to
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apply to the PC or the adjusted PC. */
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extern symtab_and_line find_frame_sal (frame_info *frame);
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/* Set the current source and line to the location given by frame
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FRAME, if possible. */
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void set_current_sal_from_frame (struct frame_info *);
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/* Return the frame base (what ever that is) (DEPRECATED).
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Old code was trying to use this single method for two conflicting
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purposes. Such code needs to be updated to use either of:
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get_frame_id: A low level frame unique identifier, that consists of
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both a stack and a function address, that can be used to uniquely
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identify a frame. This value is determined by the frame's
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low-level unwinder, the stack part [typically] being the
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top-of-stack of the previous frame, and the function part being the
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function's start address. Since the correct identification of a
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frameless function requires both a stack and function address,
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the old get_frame_base method was not sufficient.
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get_frame_base_address: get_frame_locals_address:
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get_frame_args_address: A set of high-level debug-info dependant
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addresses that fall within the frame. These addresses almost
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certainly will not match the stack address part of a frame ID (as
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returned by get_frame_base).
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This replaced: frame->frame; */
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extern CORE_ADDR get_frame_base (struct frame_info *);
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/* Return the per-frame unique identifer. Can be used to relocate a
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frame after a frame cache flush (and other similar operations). If
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FI is NULL, return the null_frame_id.
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NOTE: kettenis/20040508: These functions return a structure. On
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platforms where structures are returned in static storage (vax,
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m68k), this may trigger compiler bugs in code like:
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if (frame_id_eq (get_frame_id (l), get_frame_id (r)))
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where the return value from the first get_frame_id (l) gets
|
|
overwritten by the second get_frame_id (r). Please avoid writing
|
|
code like this. Use code like:
|
|
|
|
struct frame_id id = get_frame_id (l);
|
|
if (frame_id_eq (id, get_frame_id (r)))
|
|
|
|
instead, since that avoids the bug. */
|
|
extern struct frame_id get_frame_id (struct frame_info *fi);
|
|
extern struct frame_id get_stack_frame_id (struct frame_info *fi);
|
|
extern struct frame_id frame_unwind_caller_id (struct frame_info *next_frame);
|
|
|
|
/* Assuming that a frame is `normal', return its base-address, or 0 if
|
|
the information isn't available. NOTE: This address is really only
|
|
meaningful to the frame's high-level debug info. */
|
|
extern CORE_ADDR get_frame_base_address (struct frame_info *);
|
|
|
|
/* Assuming that a frame is `normal', return the base-address of the
|
|
local variables, or 0 if the information isn't available. NOTE:
|
|
This address is really only meaningful to the frame's high-level
|
|
debug info. Typically, the argument and locals share a single
|
|
base-address. */
|
|
extern CORE_ADDR get_frame_locals_address (struct frame_info *);
|
|
|
|
/* Assuming that a frame is `normal', return the base-address of the
|
|
parameter list, or 0 if that information isn't available. NOTE:
|
|
This address is really only meaningful to the frame's high-level
|
|
debug info. Typically, the argument and locals share a single
|
|
base-address. */
|
|
extern CORE_ADDR get_frame_args_address (struct frame_info *);
|
|
|
|
/* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
|
|
for an invalid frame). */
|
|
extern int frame_relative_level (struct frame_info *fi);
|
|
|
|
/* Return the frame's type. */
|
|
|
|
extern enum frame_type get_frame_type (struct frame_info *);
|
|
|
|
/* Return the frame's program space. */
|
|
extern struct program_space *get_frame_program_space (struct frame_info *);
|
|
|
|
/* Unwind THIS frame's program space from the NEXT frame. */
|
|
extern struct program_space *frame_unwind_program_space (struct frame_info *);
|
|
|
|
class address_space;
|
|
|
|
/* Return the frame's address space. */
|
|
extern const address_space *get_frame_address_space (struct frame_info *);
|
|
|
|
/* For frames where we can not unwind further, describe why. */
|
|
|
|
enum unwind_stop_reason
|
|
{
|
|
#define SET(name, description) name,
|
|
#define FIRST_ENTRY(name) UNWIND_FIRST = name,
|
|
#define LAST_ENTRY(name) UNWIND_LAST = name,
|
|
#define FIRST_ERROR(name) UNWIND_FIRST_ERROR = name,
|
|
|
|
#include "unwind_stop_reasons.def"
|
|
#undef SET
|
|
#undef FIRST_ENTRY
|
|
#undef LAST_ENTRY
|
|
#undef FIRST_ERROR
|
|
};
|
|
|
|
/* Return the reason why we can't unwind past this frame. */
|
|
|
|
enum unwind_stop_reason get_frame_unwind_stop_reason (struct frame_info *);
|
|
|
|
/* Translate a reason code to an informative string. This converts the
|
|
generic stop reason codes into a generic string describing the code.
|
|
For a possibly frame specific string explaining the stop reason, use
|
|
FRAME_STOP_REASON_STRING instead. */
|
|
|
|
const char *unwind_stop_reason_to_string (enum unwind_stop_reason);
|
|
|
|
/* Return a possibly frame specific string explaining why the unwind
|
|
stopped here. E.g., if unwinding tripped on a memory error, this
|
|
will return the error description string, which includes the address
|
|
that we failed to access. If there's no specific reason stored for
|
|
a frame then a generic reason string will be returned.
|
|
|
|
Should only be called for frames that don't have a previous frame. */
|
|
|
|
const char *frame_stop_reason_string (struct frame_info *);
|
|
|
|
/* Unwind the stack frame so that the value of REGNUM, in the previous
|
|
(up, older) frame is returned. If VALUEP is NULL, don't
|
|
fetch/compute the value. Instead just return the location of the
|
|
value. */
|
|
extern void frame_register_unwind (frame_info *frame, int regnum,
|
|
int *optimizedp, int *unavailablep,
|
|
enum lval_type *lvalp,
|
|
CORE_ADDR *addrp, int *realnump,
|
|
gdb_byte *valuep);
|
|
|
|
/* Fetch a register from this, or unwind a register from the next
|
|
frame. Note that the get_frame methods are wrappers to
|
|
frame->next->unwind. They all [potentially] throw an error if the
|
|
fetch fails. The value methods never return NULL, but usually
|
|
do return a lazy value. */
|
|
|
|
extern void frame_unwind_register (frame_info *next_frame,
|
|
int regnum, gdb_byte *buf);
|
|
extern void get_frame_register (struct frame_info *frame,
|
|
int regnum, gdb_byte *buf);
|
|
|
|
struct value *frame_unwind_register_value (frame_info *next_frame,
|
|
int regnum);
|
|
struct value *get_frame_register_value (struct frame_info *frame,
|
|
int regnum);
|
|
|
|
extern LONGEST frame_unwind_register_signed (frame_info *next_frame,
|
|
int regnum);
|
|
extern LONGEST get_frame_register_signed (struct frame_info *frame,
|
|
int regnum);
|
|
extern ULONGEST frame_unwind_register_unsigned (frame_info *frame,
|
|
int regnum);
|
|
extern ULONGEST get_frame_register_unsigned (struct frame_info *frame,
|
|
int regnum);
|
|
|
|
/* Read a register from this, or unwind a register from the next
|
|
frame. Note that the read_frame methods are wrappers to
|
|
get_frame_register_value, that do not throw if the result is
|
|
optimized out or unavailable. */
|
|
|
|
extern int read_frame_register_unsigned (struct frame_info *frame,
|
|
int regnum, ULONGEST *val);
|
|
|
|
/* Get the value of the register that belongs to this FRAME. This
|
|
function is a wrapper to the call sequence ``frame_register_unwind
|
|
(get_next_frame (FRAME))''. As per frame_register_unwind(), if
|
|
VALUEP is NULL, the registers value is not fetched/computed. */
|
|
|
|
extern void frame_register (struct frame_info *frame, int regnum,
|
|
int *optimizedp, int *unavailablep,
|
|
enum lval_type *lvalp,
|
|
CORE_ADDR *addrp, int *realnump,
|
|
gdb_byte *valuep);
|
|
|
|
/* The reverse. Store a register value relative to the specified
|
|
frame. Note: this call makes the frame's state undefined. The
|
|
register and frame caches must be flushed. */
|
|
extern void put_frame_register (struct frame_info *frame, int regnum,
|
|
const gdb_byte *buf);
|
|
|
|
/* Read LEN bytes from one or multiple registers starting with REGNUM
|
|
in frame FRAME, starting at OFFSET, into BUF. If the register
|
|
contents are optimized out or unavailable, set *OPTIMIZEDP,
|
|
*UNAVAILABLEP accordingly. */
|
|
extern int get_frame_register_bytes (struct frame_info *frame, int regnum,
|
|
CORE_ADDR offset, int len,
|
|
gdb_byte *myaddr,
|
|
int *optimizedp, int *unavailablep);
|
|
|
|
/* Write LEN bytes to one or multiple registers starting with REGNUM
|
|
in frame FRAME, starting at OFFSET, into BUF. */
|
|
extern void put_frame_register_bytes (struct frame_info *frame, int regnum,
|
|
CORE_ADDR offset, int len,
|
|
const gdb_byte *myaddr);
|
|
|
|
/* Unwind the PC. Strictly speaking return the resume address of the
|
|
calling frame. For GDB, `pc' is the resume address and not a
|
|
specific register. */
|
|
|
|
extern CORE_ADDR frame_unwind_caller_pc (struct frame_info *frame);
|
|
|
|
/* Discard the specified frame. Restoring the registers to the state
|
|
of the caller. */
|
|
extern void frame_pop (struct frame_info *frame);
|
|
|
|
/* Return memory from the specified frame. A frame knows its thread /
|
|
LWP and hence can find its way down to a target. The assumption
|
|
here is that the current and previous frame share a common address
|
|
space.
|
|
|
|
If the memory read fails, these methods throw an error.
|
|
|
|
NOTE: cagney/2003-06-03: Should there be unwind versions of these
|
|
methods? That isn't clear. Can code, for instance, assume that
|
|
this and the previous frame's memory or architecture are identical?
|
|
If architecture / memory changes are always separated by special
|
|
adaptor frames this should be ok. */
|
|
|
|
extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr,
|
|
gdb_byte *buf, int len);
|
|
extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
|
|
CORE_ADDR memaddr, int len);
|
|
extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
|
|
CORE_ADDR memaddr, int len);
|
|
|
|
/* Same as above, but return non-zero when the entire memory read
|
|
succeeds, zero otherwize. */
|
|
extern int safe_frame_unwind_memory (struct frame_info *this_frame,
|
|
CORE_ADDR addr, gdb_byte *buf, int len);
|
|
|
|
/* Return this frame's architecture. */
|
|
extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);
|
|
|
|
/* Return the previous frame's architecture. */
|
|
extern struct gdbarch *frame_unwind_arch (frame_info *next_frame);
|
|
|
|
/* Return the previous frame's architecture, skipping inline functions. */
|
|
extern struct gdbarch *frame_unwind_caller_arch (struct frame_info *frame);
|
|
|
|
|
|
/* Values for the source flag to be used in print_frame_info_base(). */
|
|
enum print_what
|
|
{
|
|
/* Print only the source line, like in stepi. */
|
|
SRC_LINE = -1,
|
|
/* Print only the location, i.e. level, address (sometimes)
|
|
function, args, file, line, line num. */
|
|
LOCATION,
|
|
/* Print both of the above. */
|
|
SRC_AND_LOC,
|
|
/* Print location only, but always include the address. */
|
|
LOC_AND_ADDRESS
|
|
};
|
|
|
|
/* Allocate zero initialized memory from the frame cache obstack.
|
|
Appendices to the frame info (such as the unwind cache) should
|
|
allocate memory using this method. */
|
|
|
|
extern void *frame_obstack_zalloc (unsigned long size);
|
|
#define FRAME_OBSTACK_ZALLOC(TYPE) \
|
|
((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
|
|
#define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) \
|
|
((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE)))
|
|
|
|
class readonly_detached_regcache;
|
|
/* Create a regcache, and copy the frame's registers into it. */
|
|
std::unique_ptr<readonly_detached_regcache> frame_save_as_regcache
|
|
(struct frame_info *this_frame);
|
|
|
|
extern const struct block *get_frame_block (struct frame_info *,
|
|
CORE_ADDR *addr_in_block);
|
|
|
|
/* Return the `struct block' that belongs to the selected thread's
|
|
selected frame. If the inferior has no state, return NULL.
|
|
|
|
NOTE: cagney/2002-11-29:
|
|
|
|
No state? Does the inferior have any execution state (a core file
|
|
does, an executable does not). At present the code tests
|
|
`target_has_stack' but I'm left wondering if it should test
|
|
`target_has_registers' or, even, a merged target_has_state.
|
|
|
|
Should it look at the most recently specified SAL? If the target
|
|
has no state, should this function try to extract a block from the
|
|
most recently selected SAL? That way `list foo' would give it some
|
|
sort of reference point. Then again, perhaps that would confuse
|
|
things.
|
|
|
|
Calls to this function can be broken down into two categories: Code
|
|
that uses the selected block as an additional, but optional, data
|
|
point; Code that uses the selected block as a prop, when it should
|
|
have the relevant frame/block/pc explicitly passed in.
|
|
|
|
The latter can be eliminated by correctly parameterizing the code,
|
|
the former though is more interesting. Per the "address" command,
|
|
it occurs in the CLI code and makes it possible for commands to
|
|
work, even when the inferior has no state. */
|
|
|
|
extern const struct block *get_selected_block (CORE_ADDR *addr_in_block);
|
|
|
|
extern struct symbol *get_frame_function (struct frame_info *);
|
|
|
|
extern CORE_ADDR get_pc_function_start (CORE_ADDR);
|
|
|
|
extern struct frame_info *find_relative_frame (struct frame_info *, int *);
|
|
|
|
/* Wrapper over print_stack_frame modifying current_uiout with UIOUT for
|
|
the function call. */
|
|
|
|
extern void print_stack_frame_to_uiout (struct ui_out *uiout,
|
|
struct frame_info *, int print_level,
|
|
enum print_what print_what,
|
|
int set_current_sal);
|
|
|
|
extern void print_stack_frame (struct frame_info *, int print_level,
|
|
enum print_what print_what,
|
|
int set_current_sal);
|
|
|
|
extern void print_frame_info (struct frame_info *, int print_level,
|
|
enum print_what print_what, int args,
|
|
int set_current_sal);
|
|
|
|
extern struct frame_info *block_innermost_frame (const struct block *);
|
|
|
|
extern int deprecated_frame_register_read (struct frame_info *frame, int regnum,
|
|
gdb_byte *buf);
|
|
|
|
/* From stack.c. */
|
|
|
|
extern const char print_entry_values_no[];
|
|
extern const char print_entry_values_only[];
|
|
extern const char print_entry_values_preferred[];
|
|
extern const char print_entry_values_if_needed[];
|
|
extern const char print_entry_values_both[];
|
|
extern const char print_entry_values_compact[];
|
|
extern const char print_entry_values_default[];
|
|
extern const char *print_entry_values;
|
|
|
|
/* Inferior function parameter value read in from a frame. */
|
|
|
|
struct frame_arg
|
|
{
|
|
/* Symbol for this parameter used for example for its name. */
|
|
struct symbol *sym;
|
|
|
|
/* Value of the parameter. It is NULL if ERROR is not NULL; if both VAL and
|
|
ERROR are NULL this parameter's value should not be printed. */
|
|
struct value *val;
|
|
|
|
/* String containing the error message, it is more usually NULL indicating no
|
|
error occured reading this parameter. */
|
|
char *error;
|
|
|
|
/* One of the print_entry_values_* entries as appropriate specifically for
|
|
this frame_arg. It will be different from print_entry_values. With
|
|
print_entry_values_no this frame_arg should be printed as a normal
|
|
parameter. print_entry_values_only says it should be printed as entry
|
|
value parameter. print_entry_values_compact says it should be printed as
|
|
both as a normal parameter and entry values parameter having the same
|
|
value - print_entry_values_compact is not permitted fi ui_out_is_mi_like_p
|
|
(in such case print_entry_values_no and print_entry_values_only is used
|
|
for each parameter kind specifically. */
|
|
const char *entry_kind;
|
|
};
|
|
|
|
extern void read_frame_arg (struct symbol *sym, struct frame_info *frame,
|
|
struct frame_arg *argp,
|
|
struct frame_arg *entryargp);
|
|
extern void read_frame_local (struct symbol *sym, struct frame_info *frame,
|
|
struct frame_arg *argp);
|
|
|
|
extern void info_args_command (const char *, int);
|
|
|
|
extern void info_locals_command (const char *, int);
|
|
|
|
extern void return_command (const char *, int);
|
|
|
|
/* Set FRAME's unwinder temporarily, so that we can call a sniffer.
|
|
If sniffing fails, the caller should be sure to call
|
|
frame_cleanup_after_sniffer. */
|
|
|
|
extern void frame_prepare_for_sniffer (struct frame_info *frame,
|
|
const struct frame_unwind *unwind);
|
|
|
|
/* Clean up after a failed (wrong unwinder) attempt to unwind past
|
|
FRAME. */
|
|
|
|
extern void frame_cleanup_after_sniffer (struct frame_info *frame);
|
|
|
|
/* Notes (cagney/2002-11-27, drow/2003-09-06):
|
|
|
|
You might think that calls to this function can simply be replaced by a
|
|
call to get_selected_frame().
|
|
|
|
Unfortunately, it isn't that easy.
|
|
|
|
The relevant code needs to be audited to determine if it is
|
|
possible (or practical) to instead pass the applicable frame in as a
|
|
parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
|
|
the deprecated_selected_frame global, while its replacement,
|
|
PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
|
|
The only real exceptions occur at the edge (in the CLI code) where
|
|
user commands need to pick up the selected frame before proceeding.
|
|
|
|
There are also some functions called with a NULL frame meaning either "the
|
|
program is not running" or "use the selected frame".
|
|
|
|
This is important. GDB is trying to stamp out the hack:
|
|
|
|
saved_frame = deprecated_safe_get_selected_frame ();
|
|
select_frame (...);
|
|
hack_using_global_selected_frame ();
|
|
select_frame (saved_frame);
|
|
|
|
Take care!
|
|
|
|
This function calls get_selected_frame if the inferior should have a
|
|
frame, or returns NULL otherwise. */
|
|
|
|
extern struct frame_info *deprecated_safe_get_selected_frame (void);
|
|
|
|
/* Create a frame using the specified BASE and PC. */
|
|
|
|
extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
|
|
|
|
/* Return true if the frame unwinder for frame FI is UNWINDER; false
|
|
otherwise. */
|
|
|
|
extern int frame_unwinder_is (struct frame_info *fi,
|
|
const struct frame_unwind *unwinder);
|
|
|
|
/* Return the language of FRAME. */
|
|
|
|
extern enum language get_frame_language (struct frame_info *frame);
|
|
|
|
/* Return the first non-tailcall frame above FRAME or FRAME if it is not a
|
|
tailcall frame. Return NULL if FRAME is the start of a tailcall-only
|
|
chain. */
|
|
|
|
extern struct frame_info *skip_tailcall_frames (struct frame_info *frame);
|
|
|
|
/* Return the first frame above FRAME or FRAME of which the code is
|
|
writable. */
|
|
|
|
extern struct frame_info *skip_unwritable_frames (struct frame_info *frame);
|
|
|
|
#endif /* !defined (FRAME_H) */
|