111c64899c
Recognize virtual tail call frames. * Makefile.in (SFILES): Add dwarf2-frame-tailcall.c. (HFILES_NO_SRCDIR): Add dwarf2-frame-tailcall.h. (COMMON_OBS): Add dwarf2-frame-tailcall.o. * dwarf2-frame-tailcall.c: New file. * dwarf2-frame-tailcall.h: New file. * dwarf2-frame.c: Include dwarf2-frame-tailcall.h. (execute_cfa_program): New function comment. Return INSN_PTR. Reset REGS.PREV only after CIE execution. (struct dwarf2_frame_cache): New field tailcall_cache. (dwarf2_frame_cache): New variables entry_pc, entry_cfa_sp_offset, entry_cfa_sp_offset_p and instr. Execute FDE instructions in two parts, try to find entry_cfa_sp_offset. Call dwarf2_tailcall_sniffer_first. (dwarf2_frame_prev_register): Call dwarf2_tailcall_prev_register_first when appropriate. (dwarf2_frame_dealloc_cache): New function. (dwarf2_frame_sniffer): Preinitialize cache by dwarf2_frame_cache. (dwarf2_frame_unwind): Install dwarf2_frame_dealloc_cache. (dwarf2_signal_frame_unwind): Do not install dwarf2_frame_dealloc_cache. (dwarf2_append_unwinders): Add dwarf2_tailcall_frame_unwind. (dwarf2_frame_cfa): Support also dwarf2_tailcall_frame_unwind. * dwarf2loc.c (func_addr_to_tail_call_list) (tailcall_dump, call_sitep, VEC (call_sitep), chain_candidate) (call_site_find_chain_1, call_site_find_chain): New. * dwarf2loc.h (struct call_site_chain): New. (call_site_find_chain): New declaration. * frame.c (get_frame_address_in_block): Support also TAILCALL_FRAME. * frame.h (enum frame_type): New entry TAILCALL_FRAME. * python/py-frame.c (gdbpy_initialize_frames): Add TAILCALL_FRAME. * stack.c (frame_info): Support also TAILCALL_FRAME. gdb/doc/ Recognize virtual tail call frames. * gdb.texinfo (Optimized Code): Add reference to Tail Call Frames. (Tail Call Frames): New node. (Frames In Python): Add gdb.TAILCALL_FRAME. gdb/testsuite/ Recognize virtual tail call frames. * gdb.arch/amd64-entry-value.cc (c, a, b, amb_z, amb_y, amb_x, amb) (amb_b, amb_a): New. (main): Call a and b. * gdb.arch/amd64-entry-value.exp (tailcall: breakhere, tailcall: bt) (tailcall: p i, tailcall: p j, set $sp0=$sp, up, p $sp0 == $sp, frame 3) (p $sp0 + sizeof (void *) == $sp, ambiguous: breakhere, ambiguous: bt): New tests.
104 lines
1.9 KiB
C++
104 lines
1.9 KiB
C++
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2011 Free Software Foundation, Inc.
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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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static volatile int v;
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static void __attribute__((noinline, noclone))
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e (int i, double j)
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{
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v = 0;
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}
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static void __attribute__((noinline, noclone))
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d (int i, double j)
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{
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i++;
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j++;
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e (i, j);
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e (v, v);
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asm ("breakhere:");
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e (v, v);
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}
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static void __attribute__((noinline, noclone))
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c (int i, double j)
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{
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d (i * 10, j * 10);
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}
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static void __attribute__((noinline, noclone))
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a (int i, double j)
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{
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c (i + 1, j + 1);
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}
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static void __attribute__((noinline, noclone))
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b (int i, double j)
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{
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c (i + 2, j + 2);
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}
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static void __attribute__((noinline, noclone))
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amb_z (int i)
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{
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d (i + 7, i + 7.5);
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}
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static void __attribute__((noinline, noclone))
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amb_y (int i)
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{
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amb_z (i + 6);
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}
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static void __attribute__((noinline, noclone))
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amb_x (int i)
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{
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amb_y (i + 5);
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}
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static void __attribute__((noinline, noclone))
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amb (int i)
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{
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if (i < 0)
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amb_x (i + 3);
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else
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amb_x (i + 4);
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}
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static void __attribute__((noinline, noclone))
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amb_b (int i)
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{
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amb (i + 2);
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}
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static void __attribute__((noinline, noclone))
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amb_a (int i)
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{
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amb_b (i + 1);
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}
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int
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main ()
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{
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d (30, 30.5);
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if (v)
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a (1, 1.25);
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else
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b (5, 5.25);
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amb_a (100);
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return 0;
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}
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