Hi Matthias,
src/jdk.hotspot.agent/linux/native/libsaproc/symtab.c:
```
405 // guarantee(symtab == NULL, "multiple symtab");
406 symtab = (struct symtab*)calloc(1, sizeof(struct symtab));
407 if (symtab == NULL) {
408 goto quit;
409 }
410 memset(symtab, 0, sizeof(struct symtab));
```
Why do you call memset() to clear symtab in L410?
symtab is allocated via calloc() in L406, so symtab would already cleared.
Thanks,
Yasumasa (ysuenaga)
On 2019/09/03 18:14, David Holmes wrote:
Hi Matthias,
Re-directing to serviceability-dev.
David
On 3/09/2019 5:42 pm, Baesken, Matthias wrote:
Hello, please review the following small fix .
In jdk.hotspot.agent native code (linux / macosx) we miss to check the
result of malloc/calloc a few times .
This should be adjusted.
Additionally I added initialization to the symtab array in symtab.c (by
calling memset to make sure we have a defined state ) .
One question (was not really sure about this one so I did not change it so far)
:
http://cr.openjdk.java.net/~mbaesken/webrevs/8230466.0/src/jdk.hotspot.agent/macosx/native/libsaproc/symtab.c.frames.html
359 void destroy_symtab(symtab_t* symtab) {
360 if (!symtab) return;
361 free(symtab->strs);
362 free(symtab->symbols);
363 free(symtab);
364 }
Here we miss to close symtab->hash_table (opened by dbopen) , is it
needed (haven't used dbopen much - maybe someone can comment on this)?
bug/webrev :
https://bugs.openjdk.java.net/browse/JDK-8230466
http://cr.openjdk.java.net/~mbaesken/webrevs/8230466.0/
Thanks and best regards, Matthias
