internals:engine
Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
| internals:engine [2010/04/20 10:41] – Moved FAQ here for now derick | internals:engine [2010/04/25 20:11] – derick | ||
|---|---|---|---|
| Line 5: | Line 5: | ||
| * each op_array has an array of literals (constant values) | * each op_array has an array of literals (constant values) | ||
| * opocde operands don't contain zval directly any more but points to thistable instead | * opocde operands don't contain zval directly any more but points to thistable instead | ||
| - | * during compilation they are accessible by index e.g. op_array-> | + | * during compilation they are accessible by index e.g: < |
| - | * the pass_two() changes indexes into pointers so during execution they are accessible by opline-> | + | * the pass_two() changes indexes into pointers so during execution they are accessible by: < |
| Line 24: | Line 24: | ||
| - | ==== Throwing Exceptions | + | ==== Memory Management ==== |
| + | |||
| + | [12:00pm] scoates: ok.. last question for now, I think: should I explicitly destroy | ||
| + | [12:00pm] johannes_: always cleanup yourself | ||
| + | |||
| + | Note here: while MM shutdown will take care of all allocated memory, it won't run any dtors etc., that's why it is important to clean up the resources properly - otherwise external dependencies can be messed up. And of course you'd get leaks reported in the debug mode. | ||
| + | |||
| + | ==== Causes for crashes ==== | ||
| + | |||
| + | === Throwing Exceptions | ||
| If throwing exceptions results in a segmentation fault on 64bit systems only, then be sure that you have: | If throwing exceptions results in a segmentation fault on 64bit systems only, then be sure that you have: | ||
| Line 31: | Line 40: | ||
| (Remark: This header is always needed. The segfault might be caused by the fact, that C defaults the return value and parameters of undefined parameters to int. In cases where pointers and/or long data types are needed this might be wrong so a wrong function call is being made. A good compiler should give a warning. --johannes) | (Remark: This header is always needed. The segfault might be caused by the fact, that C defaults the return value and parameters of undefined parameters to int. In cases where pointers and/or long data types are needed this might be wrong so a wrong function call is being made. A good compiler should give a warning. --johannes) | ||
| - | ==== Not yet categorized | + | ==== Hashes |
| [11:58am] scoates: what's the difference between zend_hash_[add] and zend_hash_quick_[add] ? | [11:58am] scoates: what's the difference between zend_hash_[add] and zend_hash_quick_[add] ? | ||
| [11:58am] scoates: removal of gofaster loops? (-: | [11:58am] scoates: removal of gofaster loops? (-: | ||
| [11:58am] Derick: with the 2nd one you can provide an already calculated hash-list index | [11:58am] Derick: with the 2nd one you can provide an already calculated hash-list index | ||
| - | [11:58am] Derick: plus some spaces | ||
| [11:59am] scoates: and the hashtable will automatically grow on _add, right? the length passed to init is just a hint? | [11:59am] scoates: and the hashtable will automatically grow on _add, right? the length passed to init is just a hint? | ||
| [11:59am] johannes_: right | [11:59am] johannes_: right | ||
| - | [12:00pm] scoates: ok.. last question for now, I think: should I explicitly destroy on RSHUTDOWN, or let the non-persistent flag take care of that? | + | ===== Unsorted ===== |
| - | [12:00pm] johannes_: always cleanup yourself | + | |
| - | [12:02pm] Derick: just like mommy told you | + | |
| - | [12:02pm] Derick: :) | + | |
| - | + | ||
| - | Note here: while MM shutdown will take care of all allocated memory, it won't run any dtors etc., that's why it is important to clean up the resources properly - otherwise external dependencies can be messed up. And of course you'd get leaks reported in the debug mode. | + | |
| + | Add your random stuff here. I'll move it/update it/fix it (Derick) | ||
internals/engine.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1