Remove `filename`&`lines` from `mrb_irep` struct.

This patch slightly reduce memory consumption (2% for my test).

7 files changed, 30 insertions, 188 deletions

diff --git a/include/mruby/debug.h b/include/mruby/debug.h
index d1de34882..f0a40dfcf 100644
--- a/include/mruby/debug.h
+++ b/include/mruby/debug.h
@@ -55,10 +55,11 @@ MRB_API const char *mrb_debug_get_filename(mrb_irep *irep, ptrdiff_t pc);
  */
 MRB_API int32_t mrb_debug_get_line(mrb_irep *irep, ptrdiff_t pc);
 
+MRB_API mrb_irep_debug_info *mrb_debug_info_alloc(mrb_state *mrb, mrb_irep *irep);
 MRB_API mrb_irep_debug_info_file *mrb_debug_info_append_file(
-    mrb_state *mrb, mrb_irep *irep,
+    mrb_state *mrb, mrb_irep_debug_info *info,
+    const char *filename, uint16_t *lines,
     uint32_t start_pos, uint32_t end_pos);
-MRB_API mrb_irep_debug_info *mrb_debug_info_alloc(mrb_state *mrb, mrb_irep *irep);
 MRB_API void mrb_debug_info_free(mrb_state *mrb, mrb_irep_debug_info *d);
 
 MRB_END_DECL
diff --git a/include/mruby/irep.h b/include/mruby/irep.h
index 76bafb25c..78cbc2b74 100644
--- a/include/mruby/irep.h
+++ b/include/mruby/irep.h
@@ -39,9 +39,6 @@ typedef struct mrb_irep {
 
   struct mrb_locals *lv;
   /* debug info */
-  mrb_bool own_filename;
-  const char *filename;
-  uint16_t *lines;
   struct mrb_irep_debug_info* debug_info;
 
   uint16_t ilen, plen, slen, rlen;
diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 22ad3253b..dbd3b8ecf 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -125,15 +125,6 @@ codegen_palloc(codegen_scope *s, size_t len)
 }
 
 static void*
-codegen_malloc(codegen_scope *s, size_t len)
-{
-  void *p = mrb_malloc_simple(s->mrb, len);
-
-  if (!p) codegen_error(s, "mrb_malloc");
-  return p;
-}
-
-static void*
 codegen_realloc(codegen_scope *s, void *p, size_t len)
 {
   p = mrb_realloc_simple(s->mrb, p, len);
@@ -162,7 +153,6 @@ emit_B(codegen_scope *s, uint32_t pc, uint8_t i)
     s->iseq = (mrb_code *)codegen_realloc(s, s->iseq, sizeof(mrb_code)*s->icapa);
     if (s->lines) {
       s->lines = (uint16_t*)codegen_realloc(s, s->lines, sizeof(uint16_t)*s->icapa);
-      s->irep->lines = s->lines;
     }
   }
   if (s->lines) {
@@ -1371,8 +1361,10 @@ codegen(codegen_scope *s, node *tree, int val)
     codegen_error(s, "too complex expression");
   }
   if (s->irep && s->filename_index != tree->filename_index) {
-    s->irep->filename = mrb_parser_get_filename(s->parser, s->filename_index);
-    mrb_debug_info_append_file(s->mrb, s->irep, s->debug_start_pos, s->pc);
+    const char *filename = mrb_parser_get_filename(s->parser, s->filename_index);
+
+    mrb_debug_info_append_file(s->mrb, s->irep->debug_info,
+                               filename, s->lines, s->debug_start_pos, s->pc);
     s->debug_start_pos = s->pc;
     s->filename_index = tree->filename_index;
     s->filename = mrb_parser_get_filename(s->parser, tree->filename_index);
@@ -2965,8 +2957,6 @@ scope_new(mrb_state *mrb, codegen_scope *prev, node *lv)
   p->debug_start_pos = 0;
   if (p->filename) {
     mrb_debug_info_alloc(mrb, p->irep);
-    p->irep->filename = p->filename;
-    p->irep->lines = p->lines;
   }
   else {
     p->irep->debug_info = NULL;
@@ -2984,34 +2974,22 @@ scope_finish(codegen_scope *s)
 {
   mrb_state *mrb = s->mrb;
   mrb_irep *irep = s->irep;
-  size_t fname_len;
-  char *fname;
 
   irep->flags = 0;
   if (s->iseq) {
     irep->iseq = (mrb_code *)codegen_realloc(s, s->iseq, sizeof(mrb_code)*s->pc);
     irep->ilen = s->pc;
-    if (s->lines) {
-      irep->lines = (uint16_t *)codegen_realloc(s, s->lines, sizeof(uint16_t)*s->pc);
-    }
-    else {
-      irep->lines = 0;
-    }
   }
   irep->pool = (mrb_value*)codegen_realloc(s, irep->pool, sizeof(mrb_value)*irep->plen);
   irep->syms = (mrb_sym*)codegen_realloc(s, irep->syms, sizeof(mrb_sym)*irep->slen);
   irep->reps = (mrb_irep**)codegen_realloc(s, irep->reps, sizeof(mrb_irep*)*irep->rlen);
   if (s->filename) {
-    irep->filename = mrb_parser_get_filename(s->parser, s->filename_index);
-    mrb_debug_info_append_file(mrb, irep, s->debug_start_pos, s->pc);
+    const char *filename = mrb_parser_get_filename(s->parser, s->filename_index);
 
-    fname_len = strlen(s->filename);
-    fname = (char*)codegen_malloc(s, fname_len + 1);
-    memcpy(fname, s->filename, fname_len);
-    fname[fname_len] = '\0';
-    irep->filename = fname;
-    irep->own_filename = TRUE;
+    mrb_debug_info_append_file(s->mrb, s->irep->debug_info,
+                               filename, s->lines, s->debug_start_pos, s->pc);
   }
+  mrb_free(s->mrb, s->lines);
 
   irep->nlocals = s->nlocals;
   irep->nregs = s->nregs;
diff --git a/src/debug.c b/src/debug.c
index e55f11d4f..207065d9e 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -55,7 +55,7 @@ mrb_debug_get_filename(mrb_irep *irep, ptrdiff_t pc)
 {
   if (irep && pc >= 0 && pc < irep->ilen) {
     mrb_irep_debug_info_file* f = NULL;
-    if (!irep->debug_info) { return irep->filename; }
+    if (!irep->debug_info) return NULL;
     else if ((f = get_file(irep->debug_info, (uint32_t)pc))) {
       return f->filename;
     }
@@ -69,7 +69,7 @@ mrb_debug_get_line(mrb_irep *irep, ptrdiff_t pc)
   if (irep && pc >= 0 && pc < irep->ilen) {
     mrb_irep_debug_info_file* f = NULL;
     if (!irep->debug_info) {
-      return irep->lines? irep->lines[pc] : -1;
+      return -1;
     }
     else if ((f = get_file(irep->debug_info, (uint32_t)pc))) {
       switch (f->line_type) {
@@ -122,24 +122,22 @@ mrb_debug_info_alloc(mrb_state *mrb, mrb_irep *irep)
 }
 
 MRB_API mrb_irep_debug_info_file*
-mrb_debug_info_append_file(mrb_state *mrb, mrb_irep *irep,
+mrb_debug_info_append_file(mrb_state *mrb, mrb_irep_debug_info *info,
+                           const char *filename, uint16_t *lines,
                            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; }
+  if (!info) { return NULL; }
 
-  mrb_assert(irep->filename);
-  mrb_assert(irep->lines);
+  mrb_assert(filename);
+  mrb_assert(lines);
 
-  info = irep->debug_info;
-
-  if (info->flen > 0 && strcmp(irep->filename, info->files[info->flen - 1]->filename) == 0) {
+  if (info->flen > 0 && strcmp(filename, info->files[info->flen - 1]->filename) == 0) {
     return NULL;
   }
 
@@ -156,12 +154,12 @@ mrb_debug_info_append_file(mrb_state *mrb, mrb_irep *irep,
   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);
+  fn_len = strlen(filename);
+  ret->filename_sym = mrb_intern(mrb, 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->line_type = select_line_type(lines + start_pos, end_pos - start_pos);
   ret->lines.ptr = NULL;
 
   switch (ret->line_type) {
@@ -169,7 +167,7 @@ mrb_debug_info_append_file(mrb_state *mrb, mrb_irep *irep,
       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];
+        ret->lines.ary[i] = lines[start_pos + i];
       }
       break;
 
@@ -179,18 +177,18 @@ mrb_debug_info_append_file(mrb_state *mrb, mrb_irep *irep,
       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; }
+        if (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];
+        m.line = 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];
+        prev_line = lines[start_pos + i];
       }
     } break;
 
diff --git a/src/dump.c b/src/dump.c
index e41dd83ed..6ce9c4eb9 100644
--- a/src/dump.c
+++ b/src/dump.c
@@ -353,118 +353,6 @@ write_section_irep(mrb_state *mrb, mrb_irep *irep, uint8_t *bin, size_t *len_p,
   return MRB_DUMP_OK;
 }
 
-static int
-write_section_lineno_header(mrb_state *mrb, size_t section_size, uint8_t *bin)
-{
-  struct rite_section_lineno_header *header = (struct rite_section_lineno_header*)bin;
-
-  memcpy(header->section_ident, RITE_SECTION_LINENO_IDENT, sizeof(header->section_ident));
-  uint32_to_bin((uint32_t)section_size, header->section_size);
-
-  return MRB_DUMP_OK;
-}
-
-static size_t
-get_lineno_record_size(mrb_state *mrb, mrb_irep *irep)
-{
-  size_t size = 0;
-
-  size += sizeof(uint32_t); /* record size */
-  size += sizeof(uint16_t); /* filename size */
-  if (irep->filename) {
-    size += strlen(irep->filename); /* filename */
-  }
-  size += sizeof(uint32_t); /* niseq */
-  if (irep->lines) {
-    size += sizeof(uint16_t) * irep->ilen; /* lineno */
-  }
-
-  return size;
-}
-
-static size_t
-write_lineno_record_1(mrb_state *mrb, mrb_irep *irep, uint8_t* bin)
-{
-  uint8_t *cur = bin;
-  int iseq_no;
-  size_t filename_len;
-  ptrdiff_t diff;
-
-  cur += sizeof(uint32_t); /* record size */
-
-  if (irep->filename) {
-    filename_len = strlen(irep->filename);
-  }
-  else {
-    filename_len = 0;
-  }
-  mrb_assert_int_fit(size_t, filename_len, uint16_t, UINT16_MAX);
-  cur += uint16_to_bin((uint16_t)filename_len, cur); /* filename size */
-
-  if (filename_len) {
-    memcpy(cur, irep->filename, filename_len);
-    cur += filename_len; /* filename */
-  }
-
-  if (irep->lines) {
-    mrb_assert_int_fit(size_t, irep->ilen, uint32_t, UINT32_MAX);
-    cur += uint32_to_bin((uint32_t)(irep->ilen), cur); /* niseq */
-    for (iseq_no = 0; iseq_no < irep->ilen; iseq_no++) {
-      cur += uint16_to_bin(irep->lines[iseq_no], cur); /* opcode */
-    }
-  }
-  else {
-    cur += uint32_to_bin(0, cur); /* niseq */
-  }
-
-  diff = cur - bin;
-  mrb_assert_int_fit(ptrdiff_t, diff, uint32_t, UINT32_MAX);
-
-  uint32_to_bin((uint32_t)diff, bin); /* record size */
-
-  mrb_assert_int_fit(ptrdiff_t, diff, size_t, SIZE_MAX);
-  return (size_t)diff;
-}
-
-static size_t
-write_lineno_record(mrb_state *mrb, mrb_irep *irep, uint8_t* bin)
-{
-  size_t rlen, size = 0;
-  int i;
-
-  rlen = write_lineno_record_1(mrb, irep, bin);
-  bin += rlen;
-  size += rlen;
-  for (i=0; i<irep->rlen; i++) {
-    rlen = write_lineno_record(mrb, irep, bin);
-    bin += rlen;
-    size += rlen;
-  }
-  return size;
-}
-
-static int
-write_section_lineno(mrb_state *mrb, mrb_irep *irep, uint8_t *bin)
-{
-  size_t section_size = 0;
-  size_t rlen = 0; /* size of irep record */
-  uint8_t *cur = bin;
-
-  if (mrb == NULL || bin == NULL) {
-    return MRB_DUMP_INVALID_ARGUMENT;
-  }
-
-  cur += sizeof(struct rite_section_lineno_header);
-  section_size += sizeof(struct rite_section_lineno_header);
-
-  rlen = write_lineno_record(mrb, irep, cur);
-  section_size += rlen;
-
-  write_section_lineno_header(mrb, section_size, bin);
-
-  return MRB_DUMP_OK;
-}
-
 static size_t
 get_debug_record_size(mrb_state *mrb, mrb_irep *irep)
 {
@@ -911,10 +799,6 @@ dump_irep(mrb_state *mrb, mrb_irep *irep, uint8_t flags, uint8_t **bin, size_t *
 
       section_lineno_size += get_debug_record_size(mrb, irep);
     }
-    else {
-      section_lineno_size += sizeof(struct rite_section_lineno_header);
-      section_lineno_size += get_lineno_record_size(mrb, irep);
-    }
   }
 
   if (lv_defined) {
@@ -942,12 +826,9 @@ dump_irep(mrb_state *mrb, mrb_irep *irep, uint8_t flags, uint8_t **bin, size_t *
   if (flags & DUMP_DEBUG_INFO) {
     if (debug_info_defined) {
       result = write_section_debug(mrb, irep, cur, filenames, filenames_len);
-    }
-    else {
-      result = write_section_lineno(mrb, irep, cur);
-    }
-    if (result != MRB_DUMP_OK) {
-      goto error_exit;
+      if (result != MRB_DUMP_OK) {
+        goto error_exit;
+      }
     }
     cur += section_lineno_size;
   }
diff --git a/src/load.c b/src/load.c
index 70f5406eb..559fff1d4 100644
--- a/src/load.c
+++ b/src/load.c
@@ -215,12 +215,11 @@ read_section_irep(mrb_state *mrb, const uint8_t *bin, uint8_t flags)
   return read_irep_record(mrb, bin, &len, flags);
 }
 
+/* ignore lineno record */
 static int
 read_lineno_record_1(mrb_state *mrb, const uint8_t *bin, mrb_irep *irep, size_t *len)
 {
   size_t i, fname_len, niseq;
-  char *fname;
-  uint16_t *lines;
 
   *len = 0;
   bin += sizeof(uint32_t); /* record size */
@@ -228,9 +227,6 @@ read_lineno_record_1(mrb_state *mrb, const uint8_t *bin, mrb_irep *irep, size_t
   fname_len = bin_to_uint16(bin);
   bin += sizeof(uint16_t);
   *len += sizeof(uint16_t);
-  fname = (char *)mrb_malloc(mrb, fname_len + 1);
-  memcpy(fname, bin, fname_len);
-  fname[fname_len] = '\0';
   bin += fname_len;
   *len += fname_len;
 
@@ -241,15 +237,11 @@ read_lineno_record_1(mrb_state *mrb, const uint8_t *bin, mrb_irep *irep, size_t
   if (SIZE_ERROR_MUL(niseq, sizeof(uint16_t))) {
     return MRB_DUMP_GENERAL_FAILURE;
   }
-  lines = (uint16_t *)mrb_malloc(mrb, niseq * sizeof(uint16_t));
   for (i = 0; i < niseq; i++) {
-    lines[i] = bin_to_uint16(bin);
     bin += sizeof(uint16_t); /* niseq */
     *len += sizeof(uint16_t);
   }
 
-  irep->filename = fname;
-  irep->lines = lines;
   return MRB_DUMP_OK;
 }
 
diff --git a/src/state.c b/src/state.c
index 18d104555..5583a77e5 100644
--- a/src/state.c
+++ b/src/state.c
@@ -168,10 +168,6 @@ mrb_irep_free(mrb_state *mrb, mrb_irep *irep)
   }
   mrb_free(mrb, irep->reps);
   mrb_free(mrb, irep->lv);
-  if (irep->own_filename) {
-    mrb_free(mrb, (void *)irep->filename);
-  }
-  mrb_free(mrb, irep->lines);
   mrb_debug_info_free(mrb, irep->debug_info);
   mrb_free(mrb, irep);
 }
@@ -273,7 +269,6 @@ mrb_add_irep(mrb_state *mrb)
   irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
   *irep = mrb_irep_zero;
   irep->refcnt = 1;
-  irep->own_filename = FALSE;
 
   return irep;
 }