From 111c64899c7b1811c3a04c711f4a0dc95776eecc Mon Sep 17 00:00:00 2001 From: Jan Kratochvil Date: Sun, 9 Oct 2011 19:26:44 +0000 Subject: gdb/ 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. --- gdb/python/py-frame.c | 1 + 1 file changed, 1 insertion(+) (limited to 'gdb/python/py-frame.c') diff --git a/gdb/python/py-frame.c b/gdb/python/py-frame.c index 9143367..75aa44e 100644 --- a/gdb/python/py-frame.c +++ b/gdb/python/py-frame.c @@ -595,6 +595,7 @@ gdbpy_initialize_frames (void) PyModule_AddIntConstant (gdb_module, "NORMAL_FRAME", NORMAL_FRAME); PyModule_AddIntConstant (gdb_module, "DUMMY_FRAME", DUMMY_FRAME); PyModule_AddIntConstant (gdb_module, "INLINE_FRAME", INLINE_FRAME); + PyModule_AddIntConstant (gdb_module, "TAILCALL_FRAME", TAILCALL_FRAME); PyModule_AddIntConstant (gdb_module, "SIGTRAMP_FRAME", SIGTRAMP_FRAME); PyModule_AddIntConstant (gdb_module, "ARCH_FRAME", ARCH_FRAME); PyModule_AddIntConstant (gdb_module, "SENTINEL_FRAME", SENTINEL_FRAME); -- cgit v1.1