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<p class="MsoNormal"><span lang="FR-CA">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA"><o:p> </o:p></span></p>
<p class="MsoNormal">I am developing an application using RTEMS 4.10. My development environment is a Windows PC, with MinGW installed on it. I compile RTEMS and my application using gcc version 4.8.1. When I run my application, the first printf() executed
within a RTEMS task goes into an infinite loop. The infinite loop is located in function
<span style="font-size:9.5pt;font-family:Consolas;color:black">_Heap_Allocate_aligned_with_boundary.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I isolated the problem by back tracing the code with GDB. Here is the callback trace in GDB when I am stuck in an endless loop, with information on variables
<b>block</b> and <b>heap</b>:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>(gdb) where<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#0 _Heap_Allocate_aligned_with_boundary (heap=0x40393410, alloc_size=128, alignment=0, boundary=0) at c:/opt/rtems-4.10-mingw/src/rtems-4.10/cpukit/score/src/heapallocate.c:186<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#1 0x40049684 in _Protected_heap_Allocate_aligned_with_boundary (heap=0x40393410, size=128, alignment=0, boundary=0) at c:/opt/rtems-4.10-mingw/src/rtems-4.10/cpukit/score/src/pheapallocate.c:37<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#2 0x4003b254 in malloc (size=128) at ../../cpukit/../../../leon3/lib/include/rtems/score/protectedheap.h:98<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#3 0x40025a48 in __smakebuf_r (ptr=0x40d465d0, fp=0x40d46924) at ../../../../../../../../gcc/newlib/libc/stdio/makebuf.c:95<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#4 0x40023450 in __swsetup_r (ptr=0x40d465d0, fp=0x40d46924) at ../../../../../../../../gcc/newlib/libc/stdio/wsetup.c:67<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#5 0x4002552c in __sfvwrite_r (ptr=0x40d465d0, fp=0x40d46924, uio=0x40d4638c) at ../../../../../../../../gcc/newlib/libc/stdio/fvwrite.c:63<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#6 0x4001b6a8 in _puts_r (ptr=0x40d465d0, s=0x400bd5b0 "RxTask") at ../../../../../../../../gcc/newlib/libc/stdio/puts.c:94<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#7 0x4001b6d8 in puts (s=0x400bd5b0 "RxTask") at ../../../../../../../../gcc/newlib/libc/stdio/puts.c:103<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#8 0x400133a4 in tblHandler_RxTask (unused=0) at HighLevelControl/src/TableHandler.c:664<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#9 0x400a496c in _Thread_Handler () at c:/opt/rtems-4.10-mingw/src/rtems-4.10/cpukit/score/src/threadhandler.c:146<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>#10 0x400a486c in _Thread_Handler () at c:/opt/rtems-4.10-mingw/src/rtems-4.10/cpukit/score/src/threadhandler.c:88</i></b><i><o:p></o:p></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>(gdb) print *block<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>$11 = {prev_size = 0, size_and_flag = 0, next = 0x0, prev = 0x0}<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>(gdb) print heap<o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><i>$12 = (Heap_Control *) 0x40393410</i></b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There seems to be a problem with the pointer to the heap, since the content of the first block of the heap is all zeros.<o:p></o:p></p>
<p class="MsoNormal">Does anyone came across the same problem and have a solution for it?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Philippe O’Reilly<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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