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debug: thread monitor allow to access more thread information

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The thread monitor allows to iterate over the thread context
structures for each existing thread (fiber/task) in the system.

Thread context structures do not expose thread entry information
directly. Although all the information can be scavenged from memory
stacks. Besides, accessing the information depends on the stack
implementation for each architecture.

By extending the tcs we allow a direct access to the thread
entry point and its parameters, only when thread monitor is
enabled.

It also allows a task to access its kernel task structure
through the first parameter of the thread.

This allows a debugger application to access the information directly
from the thread context structures list.

Change-Id: I0a435942b80eddffdf405016ac4056eb7aa1239c
Signed-off-by: Juan Manuel Cruz <juan.m.cruz.alcaraz@intel.com>
This commit is contained in:
Juan Manuel Cruz 2016-03-02 17:31:26 -06:00 • committed by Anas Nashif
commit d151776e59
7 changed files with 63 additions and 1 deletions
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8
arch/arm/core/thread.c
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@ -135,6 +135,14 @@ void _new_thread(char *pStackMem, unsigned stackSize, _thread_entry_t pEntry,
tcs->custom_data = NULL;
#endif
#ifdef CONFIG_THREAD_MONITOR
/*
* In debug mode tcs->entry give direct access to the thread entry
* and the corresponding parameters.
*/
tcs->entry = (struct __thread_entry *)(pInitCtx);
#endif
tcs->preempReg.psp = (uint32_t)pInitCtx;
tcs->basepri = 0;