FreeCalypso > hg > fc-magnetite
view src/cs/services/tty/tty_task.c @ 516:1ed9de6c90bd
src/g23m-gsm/sms/sms_for.c: bogus malloc removed
The new error handling code that was not present in TCS211 blob version
contains a malloc call that is bogus for 3 reasons:
1) The memory allocation in question is not needed in the first place;
2) libc malloc is used instead of one of the firmware's proper ways;
3) The memory allocation is made inside a function and then never freed,
i.e., a memory leak.
This bug was caught in gcc-built FreeCalypso fw projects (Citrine
and Selenite) because our gcc environment does not allow any use of
libc malloc (any reference to malloc produces a link failure),
but this code from TCS3.2 is wrong even for Magnetite: if this code
path is executed repeatedly over a long time, the many small allocations
made by this malloc call without a subsequent free will eventually
exhaust the malloc heap provided by the TMS470 environment, malloc will
start returning NULL, and the bogus code will treat it as an error.
Because the memory allocation in question is not needed at all,
the fix entails simply removing it.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 22 Jul 2018 06:04:49 +0000 |
parents | 945cf7f506b2 |
children |
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/** * @file tty_task.c * * Coding of the main TTY function : tty_core * This function loop in the process message function for waiting messages. * * @author Frederic Turgis (f-turgis@ti.com) & Gerard Cauvy (g-cauvy@ti.com) * @version 0.1 */ /* * History: * * Date Modification * ------------------------------------ * 01/27/2003 Create * * (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved */ #ifndef _WINDOWS #include "config/l1sw.cfg" #endif #include "tty/tty_env.h" #include "tty/tty_i.h" #include "rv/rv_general.h" #include "rvf/rvf_api.h" #include "rvm/rvm_use_id_list.h" #if (TRACE_TYPE == 1) || (TRACE_TYPE == 4) #ifndef _WINDOWS #include "config/sys.cfg" #include "config/chipset.cfg" #endif #include "l1_types.h" #include "l1_confg.h" #include "l1_trace.h" #endif #if (L1_GTT == 1) /* External prototype. */ extern void l1gtt_initialize(void); extern void l1gtt_exit(void); extern void l1gtt_main_processing(void); extern void l1gtt_init_trace(void); #else /* Dummy functions */ void l1gtt_initialize(void) {} void l1gtt_exit(void) {} void l1gtt_main_processing(void) {} void l1gtt_init_trace(void) {} #endif /** * @name Functions implementation * */ /*@{*/ /** * function: tty_core */ T_RV_RET tty_core(void) { BOOLEAN error_occured = FALSE; T_RV_HDR* msg_p; UINT16 received_event; TTY_SEND_TRACE("TTY TASK Started", RV_TRACE_LEVEL_DEBUG_HIGH ); l1gtt_init_trace(); /* loop to process messages */ while (error_occured == FALSE) { /* Wait for the necessary events. */ received_event = rvf_wait ( 0xffff,0); if (received_event & TTY_INIT_EVENT_MASK) { l1gtt_initialize(); } else if (received_event & TTY_EXIT_EVENT_MASK) { l1gtt_exit(); } else if (received_event & TTY_DATA_EVENT_MASK) { l1gtt_main_processing(); } } return RV_OK; }