IDA decompiler comments

Author: David Zimmer
Date: 07.12.23 - 11:25pm

This is worth mirroring. worked perfect for me in IDA 7.5 py3 Thanks Robert!

# Author Robert Michel - Posted on March 22, 2019
# source:
# article:

def setCommentToDecompilation(address, comment):
    #Works in IDA 6.9 (worked fine in IDA 7.5 - dz)
    #see used structures, const and functions
    cfunc = idaapi.decompile(address)
    #get the line of the decompilation for this address
    eamap = cfunc.get_eamap()
    decompObjAddr = eamap[address][0].ea

    #get a ctree location object to place a comment there
    tl = idaapi.treeloc_t()
    tl.ea = decompObjAddr
    commentSet = False
    #since the public documentation on IDAs APIs is crap and I don't know any other way, we have to brute force the item preciser
    #we do this by setting the comments with different idaapi.ITP_* types until our comment does not create an orphaned comment
    for itp in range(idaapi.ITP_SEMI, idaapi.ITP_COLON):
        tl.itp = itp    
        cfunc.set_user_cmt(tl, comment)
        #apparently you have to cast cfunc to a string, to make it update itself
        unused = cfunc.__str__()
        if not cfunc.has_orphan_cmts():
            commentSet = True

    if not commentSet:
        print("[ERROR] Please set "%s" to line %s manually" % (comment, hex(int(address))))

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