Forums - Android NDK glLinkProgram crash or failure with no log

As the shaders change during our development process, we frequently crash and fail in glLinkProgram. 

If we isolate the vertex shader and fragment shader and compile it and link it separately, it works fine.  Here's the strange part, if we reverse the order of loading the programs, then all compile and link successfully.   But this only works on some devices, but not on others.

Here are the devices we have tested that have the issue:

    HTC Verizon HTC Droid Incredible 2 (Model Number ADR6350), using Adreno 205

    HTC Sensation 4G, using Adreno 220

We have not been able to isolate the failure conditions or find robust workarounds.

Any suggestions?   Is there any way to get stack traces or symbols for the driver crashes to send to you?

Jed

P.S. Also, we are not getting any output from the linker logs.   Is there a way to turn on verbose logging during linking? 

// compile vertex shader

// compile fragment shader

// get  uniforms

glLinkProgram(prog);  // << crashes in driver

// >> Or fails, but with no log...

glGetProgramiv(prog, GL_LINK_STATUS, &status);

// If we get here, then logLength is always zero

GLint logLength;

glGetProgramiv(prog, GL_INFO_LOG_LENGTH, &logLength); 

// Even when ignoring logLength=0 returned from above, log is empty

const GLsizei logLength2 = 4000;

char szLogBuffer[logLength2];

logLength = logLength2;

glGetProgramInfoLog(prog, logLength, &logLength, szLogBuffer);

The android drivers seem to be different versions:   Here is the output from 'adb shell ls -l /system/lib/egl'

ADR6350

-rw-r--r-- root     root           26 2011-04-28 13:41 egl.cfg

-rw-r--r-- root     root        84048 2011-07-06 04:55 libEGL_adreno200.so

-rw-r--r-- root     root        93672 2011-07-06 04:55 libGLES_android.so

-rw-r--r-- root     root       175264 2011-07-06 04:55 libGLESv1_CM_adreno200.so

-rw-r--r-- root     root      1858544 2011-07-06 04:55 libGLESv2_adreno200.so

-rw-r--r-- root     root       210864 2011-07-06 04:55 libq3dtools_adreno200.so

D/PAGE44  ( 3699): OGL vendor=Qualcomm

D/PAGE44  ( 3699): OGL renderer=Adreno 205

D/PAGE44  ( 3699): OGL version=OpenGL ES 2.0 1403843

HTC Incredible 4G

-rw-r--r-- root     root           26 2011-04-22 12:31 egl.cfg

-rw-r--r-- root     root        84096 2011-08-23 09:39 libEGL_adreno200.so

-rw-r--r-- root     root        97816 2011-05-22 22:02 libGLES_android.so

-rw-r--r-- root     root       162992 2011-08-23 09:39 libGLESv1_CM_adreno200.so

-rw-r--r-- root     root      1793184 2011-08-23 09:39 libGLESv2_adreno200.so

-rw-r--r-- root     root       206768 2011-08-23 09:39 libq3dtools_adreno200.so

D/PAGE44  (10370): OGL vendor=Qualcomm

D/PAGE44  (10370): OGL renderer=Adreno (TM) 220

D/PAGE44  (10370): OGL version=OpenGL ES 2.0 1566933