mbed I/F binding for mruby
Dependents: mruby_mbed_web mirb_mbed
mbed-mruby
How to use
Class
src/debug.c
- Committer:
- mzta
- Date:
- 2015-03-25
- Revision:
- 0:158c61bb030f
File content as of revision 0:158c61bb030f:
#include <string.h> #include "mruby.h" #include "mruby/irep.h" #include "mruby/debug.h" static mrb_irep_debug_info_file * get_file(mrb_irep_debug_info *info, uint32_t pc) { mrb_irep_debug_info_file **ret; int32_t count; if (pc >= info->pc_count) { return NULL; } /* get upper bound */ ret = info->files; count = info->flen; while (count > 0) { int32_t step = count / 2; mrb_irep_debug_info_file **it = ret + step; if (!(pc < (*it)->start_pos)) { ret = it + 1; count -= step + 1; } else { count = step; } } --ret; /* check returning file exists inside debug info */ mrb_assert(info->files <= ret && ret < (info->files + info->flen)); /* check pc is within the range of returning file */ mrb_assert((*ret)->start_pos <= pc && pc < (((ret + 1 - info->files) < info->flen) ? (*(ret+1))->start_pos : info->pc_count)); return *ret; } static mrb_debug_line_type select_line_type(const uint16_t *lines, size_t lines_len) { size_t line_count = 0; int prev_line = -1; size_t i; for (i = 0; i < lines_len; ++i) { if (lines[i] != prev_line) { ++line_count; } } return (sizeof(uint16_t) * lines_len) <= (sizeof(mrb_irep_debug_info_line) * line_count) ? mrb_debug_line_ary : mrb_debug_line_flat_map; } MRB_API char const* mrb_debug_get_filename(mrb_irep *irep, uint32_t pc) { if (irep && pc < irep->ilen) { mrb_irep_debug_info_file* f = NULL; if (!irep->debug_info) { return irep->filename; } else if ((f = get_file(irep->debug_info, pc))) { return f->filename; } } return NULL; } MRB_API int32_t mrb_debug_get_line(mrb_irep *irep, uint32_t pc) { if (irep && pc < irep->ilen) { mrb_irep_debug_info_file* f = NULL; if (!irep->debug_info) { return irep->lines? irep->lines[pc] : -1; } else if ((f = get_file(irep->debug_info, pc))) { switch (f->line_type) { case mrb_debug_line_ary: mrb_assert(f->start_pos <= pc && pc < (f->start_pos + f->line_entry_count)); return f->lines.ary[pc - f->start_pos]; case mrb_debug_line_flat_map: { /* get upper bound */ mrb_irep_debug_info_line *ret = f->lines.flat_map; uint32_t count = f->line_entry_count; while (count > 0) { int32_t step = count / 2; mrb_irep_debug_info_line *it = ret + step; if (!(pc < it->start_pos)) { ret = it + 1; count -= step + 1; } else { count = step; } } --ret; /* check line entry pointer range */ mrb_assert(f->lines.flat_map <= ret && ret < (f->lines.flat_map + f->line_entry_count)); /* check pc range */ mrb_assert(ret->start_pos <= pc && pc < (((uint32_t)(ret + 1 - f->lines.flat_map) < f->line_entry_count) ? (ret+1)->start_pos : irep->debug_info->pc_count)); return ret->line; } } } } return -1; } MRB_API mrb_irep_debug_info * mrb_debug_info_alloc(mrb_state *mrb, mrb_irep *irep) { static const mrb_irep_debug_info initial = { 0, 0, NULL }; mrb_irep_debug_info *ret; mrb_assert(!irep->debug_info); ret = (mrb_irep_debug_info *)mrb_malloc(mrb, sizeof(*ret)); *ret = initial; irep->debug_info = ret; return ret; } MRB_API mrb_irep_debug_info_file * mrb_debug_info_append_file(mrb_state *mrb, mrb_irep *irep, uint32_t start_pos, uint32_t end_pos) { mrb_irep_debug_info *info; mrb_irep_debug_info_file *ret; uint32_t file_pc_count; size_t fn_len; mrb_int len; uint32_t i; if (!irep->debug_info) { return NULL; } mrb_assert(irep->filename); mrb_assert(irep->lines); info = irep->debug_info; if (info->flen > 0 && strcmp(irep->filename, info->files[info->flen - 1]->filename) == 0) { return NULL; } ret = (mrb_irep_debug_info_file *)mrb_malloc(mrb, sizeof(*ret)); info->files = (mrb_irep_debug_info_file**)( info->files ? mrb_realloc(mrb, info->files, sizeof(mrb_irep_debug_info_file*) * (info->flen + 1)) : mrb_malloc(mrb, sizeof(mrb_irep_debug_info_file*))); info->files[info->flen++] = ret; file_pc_count = end_pos - start_pos; ret->start_pos = start_pos; info->pc_count = end_pos; fn_len = strlen(irep->filename); ret->filename_sym = mrb_intern(mrb, irep->filename, fn_len); len = 0; ret->filename = mrb_sym2name_len(mrb, ret->filename_sym, &len); ret->line_type = select_line_type(irep->lines + start_pos, end_pos - start_pos); ret->lines.ptr = NULL; switch (ret->line_type) { case mrb_debug_line_ary: ret->line_entry_count = file_pc_count; ret->lines.ary = (uint16_t*)mrb_malloc(mrb, sizeof(uint16_t) * file_pc_count); for (i = 0; i < file_pc_count; ++i) { ret->lines.ary[i] = irep->lines[start_pos + i]; } break; case mrb_debug_line_flat_map: { uint16_t prev_line = 0; mrb_irep_debug_info_line m; ret->lines.flat_map = (mrb_irep_debug_info_line*)mrb_malloc(mrb, sizeof(mrb_irep_debug_info_line) * 1); ret->line_entry_count = 0; for (i = 0; i < file_pc_count; ++i) { if (irep->lines[start_pos + i] == prev_line) { continue; } ret->lines.flat_map = (mrb_irep_debug_info_line*)mrb_realloc( mrb, ret->lines.flat_map, sizeof(mrb_irep_debug_info_line) * (ret->line_entry_count + 1)); m.start_pos = start_pos + i; m.line = irep->lines[start_pos + i]; ret->lines.flat_map[ret->line_entry_count] = m; /* update */ ++ret->line_entry_count; prev_line = irep->lines[start_pos + i]; } } break; default: mrb_assert(0); break; } return ret; } MRB_API void mrb_debug_info_free(mrb_state *mrb, mrb_irep_debug_info *d) { uint32_t i; if (!d) { return; } for (i = 0; i < d->flen; ++i) { mrb_assert(d->files[i]); mrb_free(mrb, d->files[i]->lines.ptr); mrb_free(mrb, d->files[i]); } mrb_free(mrb, d->files); mrb_free(mrb, d); }