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Avoid keeping pointers from mrb_sym2name_len(); fix #4342

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The addresses for packed inline symbols reference `mrb->symbuf` that
could be overridden by the later call of `mrb_sym2name_len`. Since
file names in call stack information are kept as symbols, keeping the
address in the C structures could cause problems like #4342.

This changes small incompatible changes in function prototypes:
* `mrb_parser_get_filename`: return value changed to `mrb_sym`.
* `mrb_debug_get_filename`: add `mrb_state*` as a first argument.
* `mrb_debug_get_line`: ditto.

I believe above functions are almost internal, and no third-party
mrbgem use them.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2019-04-01 14:13:06 +09:00
parent 6ec855a38e
commit 2871d0cdc5
16 changed files with 77 additions and 76 deletions
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include/mruby/debug.h
+2 -3
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@@ -26,7 +26,6 @@ typedef struct mrb_irep_debug_info_line {
typedef struct mrb_irep_debug_info_file {
uint32_t start_pos;
const char *filename;
mrb_sym filename_sym;
uint32_t line_entry_count;
mrb_debug_line_type line_type;
@@ -47,13 +46,13 @@ typedef struct mrb_irep_debug_info {
* get line from irep's debug info and program counter
* @return returns NULL if not found
*/
MRB_API const char *mrb_debug_get_filename(mrb_irep *irep, ptrdiff_t pc);
MRB_API const char *mrb_debug_get_filename(mrb_state *mrb, mrb_irep *irep, ptrdiff_t pc);
/*
* get line from irep's debug info and program counter
* @return returns -1 if not found
*/
MRB_API int32_t mrb_debug_get_line(mrb_irep *irep, ptrdiff_t pc);
MRB_API int32_t mrb_debug_get_line(mrb_state *mrb, 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(