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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
A program performs a thread creation operation outside the initialization phase.
For the purpose of this check, a thread creation operation is considered to be in the initialization phase if it takes place in a function f() specified with configuration file parameter THREAD_INIT_FUNCTIONS, or in a function directly or transitively called by f().
| Class Name | Dynamic Thread Creation | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Significance | style | |||||||||
| Mnemonic | CONCURRENCY.DTC | |||||||||
| Categories |
|
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| Availability | Available for C and C++. |
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| Enabling | Checks for this warning class are
disabled by default. To enable them, add the following WARNING_FILTER
rule to the project configuration file.
WARNING_FILTER += allow class="Dynamic Thread Creation" |
Japanese (ja)
#include <pthread.h>
pthread_t thread1;
pthread_t thread2;
void * thread_func( void * arg ) { return arg; }
/* With factory settings, function name 'dyn_init' matches a
* THREAD_INIT_FUNCTIONS rule, so this function can directly or
* transitively call thread creation functions without triggering a
* 'Dynamic Thread Creation' warning
*/
void dyn_init(){
if( pthread_create( &thread1, NULL, thread_func, NULL ) ) { thread1 = 0; }
if( pthread_create( &thread2, NULL, thread_func, NULL ) ) { thread2 = 0; }
}
int main(){
pthread_t thrd;
/* starting process - do all thread creation now */
dyn_init();
/* no more thread creation from this point on */
/* ... */
if( !pthread_create( &thrd, NULL, thread_func, NULL ) ) /* 'Dynamic Thread Creation' warning issued here */
pthread_detach( thrd );
/* ... */
if( thread1 ) pthread_detach( thread1 );
if( thread2 ) pthread_detach( thread2 );
return 0;
}
Warnings of this class can be triggered by any function specified with configuration file parameter THREAD_CREATION_FUNCTIONS.
Only code reachable from a program entry point can trigger warnings for this class. CodeSonar will treat a function as a program entry point if it is specified with configuration file parameter PROGRAM_ENTRY_POINTS. The factory setting of this parameter instructs CodeSonar to treat main() and init() as entry points.
The following configuration file parameters affect checks for this warning class.