Could the issue be bounds checking in the primitive? But it is a seg-fault, not a #primitiveFailed. Thanks for any and all help! This one has me stumped.

((interpreterProxy isBytes: a) and: [ (interpreterProxy stSizeOf: a) = 4 ]) ifFalse: [ ^interpreterProxy primitiveFailFor: PrimErrBadArgument ]. ((interpreterProxy isBytes: b) and: [ (interpreterProxy stSizeOf: b) = 4 ]) ifFalse: [ ^interpreterProxy primitiveFailFor: PrimErrBadArgument ].

--- Kindly, Robert

On 5/29/21 2:42 PM, Robert Withers wrote:

Here is the RSErasurePlugin.so & RSFECPlugin.so so folks may be able to help me test the seg-fault with these plugin and loading the latest RSErasure code:

...

Installer ss project: 'Cryptography'; install: 'ProCrypto-1-1-1'; install: 'ProCryptoTests-1-1-1'.

Here is the code I run that leads to the seg-fault:

...

RSErasureGalois newGalois.

---

Kindly, Robert

On 5/29/21 2:37 PM, Robert Withers wrote:

...

Hey y'all,

I am getting a segmentation fault calling primitiveGaloisMultiplyBy in my RSErasurePlugin. I have attached the crash.dmp file. Investigating...assistance requested. Grazie!!

--

Kindly, Robert

I have an issue with:

RSErasureGalois newGalois divide: 4 by: 2.

In the image I get 2. In the plugin I get 142, which is the value for index 255 in the expTable. My question is how can I printf to stdout, inside the plugin code. I tried adding some debug lines to the c code:

printf( "a: %i\n", a ); printf( "b: %i\n", b ); logA = logTable[a]; logB = logTable[b]; printf( "logA: %i\n", logA ); printf( "logB: %i\n", logB ); logResult = logA - logB; while (logResult <= 0) { logResult += 0xFF; } if (logResult == 0) { return 1; } printf( "logResult: %i\n", logResult ); result = expTable[logResult]; printf( "result: %i\n", result );

This did not work, however. How can I debug the c code?

--- Kindly, Robert

On 5/29/21 3:29 PM, Robert Withers wrote:

I commented out these argument checks and regenerated and rebuilt the plugins. New plugins are attached.

Now the RSErasureGaloisWithPlugin is working, for the following squeak calls.

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RSErasureGalois newGalois... a RSErasureGaloisWithPlugin

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self addOrSubtract: 2 by: 1. = 3 self divide: 4 by: 2. = 14 self exp: 3. = 8 self exp: 2 power: 2. = 4 self log: 4. = 2 self galoisMultiply: 2 by: 2. = 4 self tableMultiply: 2 by: 2. = 4

I still have problems with the RSFECPlugin, calling methods in RSFECGenericGFWithPlugin:

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RSFECGenericGF newPrimitive: 16r012D size: 256 generatorBase: 1... a RSFECGenericGFWithPlugin

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self addOrSubtract: 2 by: 1. = 3 self exp: 3. {#primitiveFailed} self inverse: 2. = 0 self log: 4. {#primitiveFailed} self multiply: 2 by: 2. {#primitiveFailed}

---

Kindly, Robert

On 5/29/21 2:49 PM, Robert Withers wrote:

...

Could the issue be bounds checking in the primitive? But it is a seg-fault, not a #primitiveFailed. Thanks for any and all help! This one has me stumped.

...

((interpreterProxy isBytes: a) and: [ (interpreterProxy stSizeOf: a) = 4 ]) ifFalse: [ ^interpreterProxy primitiveFailFor: PrimErrBadArgument ]. ((interpreterProxy isBytes: b) and: [ (interpreterProxy stSizeOf: b) = 4 ]) ifFalse: [ ^interpreterProxy primitiveFailFor: PrimErrBadArgument ].

---

Kindly, Robert

On 5/29/21 2:42 PM, Robert Withers wrote:

...

Here is the RSErasurePlugin.so & RSFECPlugin.so so folks may be able to help me test the seg-fault with these plugin and loading the latest RSErasure code:

...

Installer ss project: 'Cryptography'; install: 'ProCrypto-1-1-1'; install: 'ProCryptoTests-1-1-1'.

Here is the code I run that leads to the seg-fault:

...

RSErasureGalois newGalois.

---

Kindly, Robert

On 5/29/21 2:37 PM, Robert Withers wrote:

...

Hey y'all,

I am getting a segmentation fault calling primitiveGaloisMultiplyBy in my RSErasurePlugin. I have attached the crash.dmp file. Investigating...assistance requested. Grazie!!

--

Kindly, Robert