Segmentation fault with Rapid Simulation Target and tunable inline parameters

[Matthew]

I'm using tunable inline parameters and Rapid Simulation Target with my simulink model in R2014b. My model compiles and runs without error if I don't pass inline parameters using the rtP structure, but I get a segmentation fault when I do. I have other models that compile and run without a problem so I expect there is something about this slx file in particular.

Here is error message in gdb:
Program received signal SIGSEGV, Segmentation fault.
0x00000000004222aa in ReplaceRtP (S=0x1100a20, paramStructure=0x1102720)
at /usc-data/m/linux/matlabR2014b/rtw/c/src/rapid/rapid_utils.c:1476
1476 char *transAddress = dtTransGetAddress(dtTable, dataTransIdx);
Missing separate debuginfos, use: debuginfo-install libX11-1.6.0-2.2.el6.x86_64 libXau-1.0.6-4.el6.x86_64 libxcb-1.9.1-2.el6.x86_64 ncurses-libs-5.7-3.20090208.el6.x86_64 zlib-1.2.3-29.el6.x86_64
(gdb) where
#0 0x00000000004222aa in ReplaceRtP (S=0x1100a20, paramStructure=0x1102720)
at /usc-data/m/linux/matlabR2014b/rtw/c/src/rapid/rapid_utils.c:1476
#1 0x0000000000423989 in rt_RapidReadMatFileAndUpdateParams (S=0x1100a20)
at /usc-data/m/linux/matlabR2014b/rtw/c/src/rapid/rapid_utils.c:2103
#2 0x000000000041d264 in main (argc=3, argv=0x7fffffffc058)
at /usc-data/m/linux/matlabR2014b/rtw/c/rsim/rsim_main.c:644

(gdb) p dtTable
$13 = (DataTypeTransitionTable *) 0x1100a00
(gdb) p dataTransIdx
$14 = 0

I have only one tunable variable. It is designated as a SimulinkGlobal in the Model Parameter Configuration dialog window. Indeed, when I retrieve the rtP structure using rsimgetrtp, the structure contains the map field and the data values are as I set them in the workspace. Here are the contents:

>> rtP

rtP =

modelChecksum: [4.1022e+09 58414328 2.2901e+09 979637131]
parameters: [1x1 struct]

>> rtP.parameters

ans =

dataTypeName: 'double'
dataTypeId: 0
complex: 0
dtTransIdx: 0
values: [1x98 double]
map: [1x1 struct]

>> rtP.parameters.map

ans =

Identifier: 'i_init'
ValueIndices: [1 98]
Dimensions: [98 1]

>> rtP.parameters.values(1)

ans =

865.1175

I pass the rtP structure in to my executable correctly since I see the correct filename when debugging in rapid_utils.c. rt_ReadParamStructMatFile appears to be reading the values correctly at rapid_utils.c:325. I do get a good pointer there and I retrieve the correct number of elements and values:

325 dtprmInfo->rVals = mxGetData(mat);
(gdb) p dtprmInfo->nEls
$2 = 98
(gdb) n
326 dtprmInfo->iVals = mxGetImagData(mat);
(gdb) p dtprmInfo->rVals
$3 = (void *) 0x1680b40
(gdb) p ((double *)dtprmInfo->rVals)[0]
$11 = 865.11753589911314

In ReplaceRtP, paramStructure is still good:

(gdb) where
#0 0x00000000004222aa in ReplaceRtP (S=0x1100a20, paramStructure=0x1102720)
at /usc-data/m/linux/matlabR2014b/rtw/c/src/rapid/rapid_utils.c:1476
#1 0x0000000000423989 in rt_RapidReadMatFileAndUpdateParams (S=0x1100a20)
at /usc-data/m/linux/matlabR2014b/rtw/c/src/rapid/rapid_utils.c:2103
#2 0x000000000041d264 in main (argc=3, argv=0x7fffffffc058)
at /usc-data/m/linux/matlabR2014b/rtw/c/rsim/rsim_main.c:644
(gdb) p *(double *)paramStructure.dtParamInfo.rVals
$20 = 865.11753589911314

For some reason, dtTransGetAddress fails:
char *transAddress = dtTransGetAddress(dtTable, dataTransIdx);

In rtw/c/src/dt_info.h:
#define dtTransGetAddress(dtTable, idx) \
((dtTable)->transitions[(idx)].baseAddr)

I get:
(gdb) p *dtTable
$22 = {numTransitions = 0, transitions = 0x0}

So transitions is null. This is the problem. Why?

In rapid_utils.c:1471:
DataTypeTransitionTable *dtTable = dtGetParamDataTypeTrans(dtInfo);

In dt_info.h:78:
#define dtGetParamDataTypeTrans(dtInfo) ((dtInfo)->P)

I get:
(gdb) p *dtInfo
$24 = {numDataTypes = 0, dataTypeSizes = 0x0, dataTypeNames = 0x42e740, B = 0x10ff640,
P = 0x1100a00, DWork = 0x42e780, Xd = 0x100000000, U = 0x0, Y = 0x16840f0}
(gdb) p *dtInfo.P
$25 = {numTransitions = 0, transitions = 0x0}

Chasing it further to rapid_utils.c:1470:
const DataTypeTransInfo *dtInfo = (const DataTypeTransInfo *)ssGetModelMappingInfo(S);

So ssGetModelMappingInfo must be failing to retrieve P but I can't find the source for ssGetModelMappingInfo to figure out why.

Any suggestions? Any settings in the slx file that I should double check? I've compared my settings to other slx files that work fine in 2014b and could not find a discrepancy.

[Matthew]

This problem was solved by copy/pasting the simulink model into a new model file and recompiling. The old file must have been corrupted somehow.




"Matthew" wrote in message <mbm51e$r5u$1...@newscl01ah.mathworks.com>...