Value types field setting consistency checks #8
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anikser
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Aug 16, 2018
runtime/bcverify/rtverify.c
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| /* cannot set value type to null | ||
| * TODO: proper exception */ | ||
| printf("BIG ERROR\n"); | ||
| goto _inconsistentStack; |
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Other than an NLS message, how should I implement the exception throwing? I notice there are some constants defined for the verboseErrorCode in j9consts.h, but are these mapped to something?
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ya they used in errormessageframeworkrtv.c.
I think in this case it would be better to use the _miscError target and add your own errorcode (similar to BCV_ERR_BAD_ACCESS_PROTECTED)
Signed-off-by: Mohammad Ali Nikseresht <anikser@ibm.com>
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Value type fields are non-nullable - this check can be performed during bytecode verification for some cases, ie. when aconst_null appears immediately before putfield. Signed-off-by: Mohammad Ali Nikseresht <anikser@ibm.com>
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Withfield can only operate on a value type class field, and putfield and putstatic cannot operate on a value type class field. Signed-off-by: Mohammad Ali Nikseresht <anikser@ibm.com>
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tajila
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Added wrapper for image memory allocate and image memory free
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Implment monitor enter/exit for valuetypes
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This change implements consistency checking for value type related field setting. A hash table of the names listed in a class's ValueTypes attribute is created, and used to perform the following checks during runtime bytecode verification:
during bytecode verification for some cases, ie. when aconst_null
appears immediately before putfield.
Also add a couple missing
#if definedstatements in field setting bytecode verification.