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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2011-10-09 19:26:42 +0000 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2011-10-09 19:26:42 +0000 |
| commit | b8cf68580fa8900f6750adc16b3454433fbdccd0 (patch) | |
| tree | 39a489662b058a15ee5012cffd88845ab8d7c2be /gdb/dwarf2loc.h | |
| parent | 38248156a0ec4023b44e3ba16f399a1971202d73 (diff) | |
| download | gdb-b8cf68580fa8900f6750adc16b3454433fbdccd0.tar.gz | |
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.
Diffstat (limited to 'gdb/dwarf2loc.h')
| -rw-r--r-- | gdb/dwarf2loc.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gdb/dwarf2loc.h b/gdb/dwarf2loc.h index 9efe1962105..32aa0af3dfc 100644 --- a/gdb/dwarf2loc.h +++ b/gdb/dwarf2loc.h @@ -139,4 +139,23 @@ extern void dwarf2_compile_expr_to_ax (struct agent_expr *expr, const gdb_byte *op_end, struct dwarf2_per_cu_data *per_cu); +/* Determined tail calls for constructing virtual tail call frames. */ + +struct call_site_chain + { + /* Initially CALLERS == CALLEES == LENGTH. For partially ambiguous result + CALLERS + CALLEES < LENGTH. */ + int callers, callees, length; + + /* Variably sized array with LENGTH elements. Later [0..CALLERS-1] contain + top (GDB "prev") sites and [LENGTH-CALLEES..LENGTH-1] contain bottom + (GDB "next") sites. One is interested primarily in the PC field. */ + struct call_site *call_site[1]; + }; + +struct call_site_stuff; +extern struct call_site_chain *call_site_find_chain (struct gdbarch *gdbarch, + CORE_ADDR caller_pc, + CORE_ADDR callee_pc); + #endif /* dwarf2loc.h */ |