On Wed, 6 Sept 2023 at 18:20, summer xia <xiagua...@gmail.com> wrote: > > I use this version: llvmpipe (LLVM 14.0.0, 256 bits Type: CPU API: 1.3.246) > as a backed vulkan engine. When I trace the whole pipeline that draws a > picture. I can trace all the C level codes as following hints: > > #0 lp_setup_draw_elements (vbr=0x555555bcfe30, indices=0x555555bcdf10, > nr=1023) at ../src/gallium/drivers/llvmpipe/lp_setup_vbuf.c:238 > #1 0x00007ffff61d0707 in draw_pt_emit (emit=0x555555bcfce0, > vert_info=0x7fffd966e718, prim_info=0x7fffd966e8d8) at > ../src/gallium/auxiliary/draw/draw_pt_emit.c:197 > #2 0x00007ffff61cc208 in emit (emit=0x555555bcfce0, > vert_info=0x7fffd966e718, prim_info=0x7fffd966e8d8) at > ../src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c:541 > #3 0x00007ffff61cbe4c in llvm_pipeline_generic (middle=0x555555bcfbd0, > fetch_info=0x0, in_prim_info=0x7fffd966e8d8) at > ../src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c:759 > #4 0x00007ffff61ca5fc in llvm_middle_end_run (middle=0x555555bcfbd0, > fetch_elts=0x555555bccf10, fetch_count=683, draw_elts=0x555555bcdf10, > draw_count=1023, prim_flags=2) at > ../src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c:812 > #5 0x00007ffff6130283 in vsplit_flush_cache (vsplit=0x555555bcced0, flags=2) > at ../src/gallium/auxiliary/draw/draw_pt_vsplit.c:78 > #6 0x00007ffff6131236 in vsplit_segment_cache_uint (vsplit=0x555555bcced0, > flags=2, istart=0, icount=1023, spoken=0 '\000', ispoken=0, close=0 '\000', > iclose=0) at ../src/gallium/auxiliary/draw/draw_pt_vsplit_tmp.h:163 > #7 0x00007ffff6130f8c in vsplit_segment_simple_uint (vsplit=0x555555bcced0, > flags=2, istart=0, icount=1023) at > ../src/gallium/auxiliary/draw/draw_pt_vsplit_tmp.h:173 > #8 0x00007ffff612f4cd in vsplit_run_uint (frontend=0x555555bcced0, start=0, > count=5529600) at ../src/gallium/auxiliary/draw/draw_split_tmp.h:106 > #9 0x00007ffff6122e96 in draw_pt_arrays (draw=0x555555b96920, > prim=PIPE_PRIM_TRIANGLES, index_bias_varies=true, draw_info=0x7fffd966ec70, > num_draws=1) at ../src/gallium/auxiliary/draw/draw_pt.c:161 > #10 0x00007ffff6122995 in draw_instances (draw=0x555555b96920, > drawid_offset=0, info=0x555555b7fb60, draws=0x7fffd966ec70, num_draws=1) at > ../src/gallium/auxiliary/draw/draw_pt.c:485 > #11 0x00007ffff6122689 in draw_vbo (draw=0x555555b96920, info=0x555555b7fb60, > drawid_offset=0, indirect=0x0, draws=0x7fffd966ec70, num_draws=1, > patch_vertices=0 '\000') at ../src/gallium/auxiliary/draw/draw_pt.c:619 > #12 0x00007ffff60757ee in llvmpipe_draw_vbo (pipe=0x555555b8db40, > info=0x555555b7fb60, drawid_offset=0, indirect=0x0, draws=0x7fffd966ec70, > num_draws=1) at ../src/gallium/drivers/llvmpipe/lp_draw_arrays.c:150 > #13 0x00007ffff5c71083 in handle_draw_indexed (cmd=0x555555dca790, > state=0x555555b7faf0) at ../src/gallium/frontends/lavapipe/lvp_execute.c:2725 > #14 0x00007ffff5c6f1e0 in lvp_execute_cmd_buffer (cmd_buffer=0x555555b78520, > state=0x555555b7faf0, print_cmds=false) at > ../src/gallium/frontends/lavapipe/lvp_execute.c:4324 > #15 0x00007ffff5c6ef10 in lvp_execute_cmds (device=0x555555b7e5f0, > queue=0x555555b7f8e0, cmd_buffer=0x555555b78520) at > ../src/gallium/frontends/lavapipe/lvp_execute.c:4621 > #16 0x00007ffff5c682ba in lvp_queue_submit (vk_queue=0x555555b7f8e0, > submit=0x555555dccb80) at ../src/gallium/frontends/lavapipe/lvp_device.c:1548 > #17 0x00007ffff5d651fd in vk_queue_submit_final (queue=0x555555b7f8e0, > submit=0x555555dccb80) at ../src/vulkan/runtime/vk_queue.c:377 > #18 0x00007ffff5d67eef in vk_queue_submit_thread_func (_data=0x555555b7f8e0) > at ../src/vulkan/runtime/vk_queue.c:490 > #19 0x00007ffff5d45522 in impl_thrd_routine (p=0x555555aa1ee0) at > ../src/c11/impl/threads_posix.c:67 > #20 0x00007ffff7894b43 in start_thread (arg=<optimized out>) at > ./nptl/pthread_create.c:442 > #21 0x00007ffff7926a00 in clone3 () at > ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 > > > But when I want to make clear what this method's function : > > /* Run vertex fetch shader */ > clipped = fpme->current_variant->jit_func(&fpme->llvm->jit_context, > llvm_vert_info.verts, > draw->pt.user.vbuffer, > fetch_info->count, > start, > fpme->vertex_size, > draw->pt.vertex_buffer, > draw->instance_id, > vertex_id_offset, > draw->start_instance, > elts, > draw->pt.user.drawid, > draw->pt.user.viewid); > I can't step into this function with gdb and can't find any hints on how to > fill this llvm_vert_info.verts in it. Appreciate any comments.
Currently there is just no nice way to debug the jit code with a debugger, I've done some investigation into adding debug support to the LLVM generator, but it's definitely non-trivial, Usually I just end up adding lp_build_print_value statements to the generator code so you can at least get JIT debug print statements, the generators are in draw_llvm.c for the vs/gs/tess shaders. Dave.
