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PrecedenceBoundaryInference.cpp, no canaries for these inferences, reveted to no validation for precedence inference.



Former-commit-id: 3af84450e6f2a0e18ad42aeff5a1874847815029

Assert false if the info annot file cannot be opened (likely will have to change this in a subsequent commit).

Memset inferences have been shown to be unsafe, they are no longer attempted without validation. 




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In pntransformdriver, if the current inference is at the lowest level in the hierarchy, then do not perform validation. 



Former-commit-id: 0093d1b0b62fe7fd280f8adb7e421817aa07b0c9

PrecedenceBoundaryInference based on p1 did not add an out args region as necessary. Now if precedence bounds sees the supplied inference out args is 0, it assumes the first object is an out args region to be conservative. 




Former-commit-id: 1b2aae1354c7be53640671f80ccbf7c5bf463413

PrecedenceBoundaryInference now takes boundaries from a boundary generator, converts them to esp bounds, then produces a "transitive closure" on these ranges. That is, if any ranges intersect, containing all intersections is what is used for the boundary inference. 



Former-commit-id: 01be564a8ca11cfffad6e0d3ac3c7ea420c81acd

Changed padding to be a random amount of padding plus size equal to the aligned size of the allocated stack. 




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Added changes to allow padding between dynamic sized arrays, not between the rest of the variables though (i.e., the transform is essentilaly part PN and part P1).



Former-commit-id: 4c381883db0bd2af024695fe3faf21d33e4bd62e

OffsetInference.cpp, the dynamic stack output log code now checks to see if the file is opened before writing. 



Former-commit-id: 6532b6068e371f715db830b842ecc094606ea058

OffsetInference.cpp, keeping with the last change to output a dynamic_stack.log, I do a check for null pointers before attempting to print the address of the isntruction. I don't think this can happen, but I don't want to break TNE. 



Former-commit-id: 9a9c34bbdbb9ad5032c5354257fed5be1a6d0122

in OffsetInference.cpp if a dynamic stack frame is detected, a log file, dynamic_stack.log, is created, which lists the functions, addresses, and instructions indicating a dynamic stack frame. 
 


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Due to some stupidity, OffsetInference.cpp had lost a previously made change to avoid adding too much padding to recursive functions. This functionality has been restored. 



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OffsetInference bug fix, do not transform functions that deallocate the stack by a different ammount used for allocation. 




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OffsetInference looks for recursive functions, if found a flag is set, and when padding is added to that function, the padding is significantly reduced. 



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If a function is not believed to have a dynamic stack frame, canary checks are performed prior to any function call. 



Former-commit-id: 20be9054ca856ffa82e9189618cab59aae23ebb7

PNRegularExpressions.cpp: modified the regex_ret expression to only match lines that contain ret only.

OffsetInference.cpp: When inferring layouts, the number of ret instructions is counted. If 0 and no deallocation site is found, the function is considered transformable. 




Former-commit-id: 716e7a209e985fb0c3758300755efb95442fb760

The primary change in this commit is the support of dynamic arrays and alloca functions as well as adding a few more prologue checks. 

Added General_Utility.*, as of this commit, this utility "class" contains a str2int and str2uint function. 

Changed makefile to reflect addition of General_Utility.*.

Modified PNRegularExpressions.cpp, changed stack_dealloc_implicit. Added the pattern

lea esp, [ebp-<const>]

as a valid stack deallocation. 

OffsetInference.cpp now checks the amount by which esp is subtracted in 

sub esp, <val>

instructions. If the value is determined to be non-integral, it is assumed the function is using alloca or dynamic arrays, and the function is considered non PNsafe (only p1 is attempted). 

Given the addition to PNRegularExpressions.cpp, in OffsetInference.cpp, stack_dealloc_implicit checks are now done first. 

PNTransformDriver.cpp also does a check to see if sub esp, <val> contains an integral value, and does not transform instructions that do not. 

OffsetInference.cpp now does a stack deallocation check for add esp, 0x00000000, and does not filter a function based on 0 not matching the size of the stack frame. 




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