OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Fix memory leak of gsymbol 

We did not free global symbols. For a simplified abstract_type_3.f90
valgrind reports:

96 bytes in 1 blocks are still reachable in loss record 461 of 602
   at 0x48377D5: calloc (vg_replace_malloc.c:711)
   by 0x21257C3: xcalloc (xmalloc.c:162)
   by 0x98611B: gfc_get_gsymbol(char const*) (symbol.c:4341)
   by 0x932C58: parse_module() (parse.c:5912)
   by 0x9336F8: gfc_parse_file() (parse.c:6236)
   by 0x991449: gfc_be_parse_file() (f95-lang.c:204)
   by 0x11D8EDE: compile_file() (toplev.c:455)
   by 0x11DB9C3: do_compile() (toplev.c:2170)
   by 0x11DBCAF: toplev::main(int, char**) (toplev.c:2305)
   by 0x2045D37: main (main.c:39)

This patch reduces this to

 LEAK SUMMARY:
    definitely lost: 344 bytes in 1 blocks
    indirectly lost: 3,024 bytes in 4 blocks
      possibly lost: 0 bytes in 0 blocks
-   still reachable: 1,576,174 bytes in 2,277 blocks
+   still reachable: 1,576,078 bytes in 2,276 blocks
         suppressed: 0 bytes in 0 blocks

gcc/fortran/ChangeLog:

2018-10-21  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>

	* parse.c (clean_up_modules): Free gsym.
This commit is contained in:
Bernhard Reutner-Fischer 2018-10-21 15:55:40 +02:00
parent db3f6783bd
commit 75c9fa318e
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
gcc/fortran/parse.c
View File

@ -6569,7 +6569,7 @@ resolve_all_program_units (gfc_namespace *gfc_global_ns_list)
static void
clean_up_modules (gfc_gsymbol *gsym)
clean_up_modules (gfc_gsymbol *&gsym)
{
if (gsym == NULL)
return;
@ -6577,14 +6577,18 @@ clean_up_modules (gfc_gsymbol *gsym)
clean_up_modules (gsym->left);
clean_up_modules (gsym->right);
if (gsym->type != GSYM_MODULE || !gsym->ns)
if (gsym->type != GSYM_MODULE)
return;
gfc_current_ns = gsym->ns;
gfc_derived_types = gfc_current_ns->derived_types;
gfc_done_2 ();
gsym->ns = NULL;
return;
if (gsym->ns)
{
gfc_current_ns = gsym->ns;
gfc_derived_types = gfc_current_ns->derived_types;
gfc_done_2 ();
gsym->ns = NULL;
}
free (gsym);
gsym = NULL;
}