Sxe hack

I began this hack because I wanted a JSON parser that was fast and memory efficient, and yet allowed the parsed objects it produced to be accessed very quickly. The initial implementation is now complete. Offsets are 32 bit integers, meaning sxe-jitson arrays can hold at most elements. Subsequent lookups are then made via the index.

Each member name is hashed using sxe-hash-sum, which defaults to the venerable lookup3 algorithm and its offset stored in the index at sum modulo number of members. Susequent lookups are then made via the index.

Loaded dictionary in 0. The time to access all keys in the dictionary was reduced from 5 minutes 30 seconds to 35 milliseconds. Only 9 milliseconds were needed to build the indeces, and only additional kilobytes.

Perhaps using a better hash algorithm will change this. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account.

Notify me of new comments via email. Notify me of new posts via email. Programming with Jim. Skip to content. The sx command displays the list of exceptions for the current process and the list of all nonexception events and displays the default behavior of the debugger for each exception and event.

The sxe , sxd , sxn , and sxi commands control the debugger settings for each exception and event. The sxr command resets all of the exception and event filter states to the default settings. Commands are cleared, break and continue options are reset to their default settings, and so on.

The sx- command does not change the handling status or the break status of the specified exception or event. This command can be used if you wish to change the first-chance command or second-chance command associated with a specific event, but do not wish to change anything else.

If you include the -h option or if the cc , hc , bpec , or ssec events are specified , the sxe , sxd , sxn , and sxi commands control the handling status of the exception or event. In all other cases, these commands control the break status of the exception or event. When this exception occurs, the target immediately breaks into the debugger before any other error handlers are activated.

This kind of handling is called first chance handling. The debugger does not break for a first-chance exception of this type although a message is displayed. If other error handlers do not address this exception, execution stops and the target breaks into the debugger. This kind of handling is called second chance handling. When this exception occurs, the target application does not break into the debugger at all. However, a message is displayed that notifies the user of this exception.

When this exception occurs, the target application does not break into the debugger at all, and no message is displayed. You can use the -h option together with exceptions, not events.

Using this option with ch , bpe , or sse sets the handling status for hc , bpec , or ssec , respectively. If you use the -h option with any other event, it has no effect. Using the -c or -c2 options with hc , bpec , or ssec associates the specified commands with ch , bpe , or sse , respectively. In the following example, the sxe command is used to set the break status of access violation events to break on the first chance, and to set the first-chance command that will be executed at that point to r eax.

Then the sx- command is used to alter the first-chance command to r ebx , without changing the handling status. Finally, a portion of the sx output is shown, indicating the current settings for access violation events:. Using Breakpoints - Debugging Techniques. Conditional breakpoints in WinDbg. Executing Until a Specified State is Reached.