| --- Log opened Sun Jun 18 00:00:16 2017 |
| 01:04 | <&ToxicFrog> | Ahahaha |
| 01:04 | <&ToxicFrog> | #define SAFETY_CHECKS was using a bunch of RAM, but I couldn't figure out where |
| 01:04 | <&ToxicFrog> | Answer: __FILE__ |
| 01:05 | <&ToxicFrog> | Fixed it by replacing printf_P(PSTR("%s:%d: ..."), __FILE__, __LINE__, ...) |
| 01:05 | <&ToxicFrog> | With printf_P(PSTR(__FILE__ ":%d: ..."), __LINE__, ...) |
| 01:08 | <&ToxicFrog> | Boom, another 170 bytes of RAM saved and RAM usage is now *below* where it was before I started adding proper error reporting. |
| 01:08 | <&ToxicFrog> | (it's at 430b now, most of that the serial library; briefly it was around 1.2k) |
| 01:14 | <&ToxicFrog> | Hmm. But now I've broken serial IO on the AVR. |
| 01:25 | <&ToxicFrog> | Fixed, turns out that it's kind of important to not interleave calls that talk to stdio and calls that talk directly to the UART if you want either one to behave sensibly |
| 01:25 | | * ToxicFrog does some numbers |
| 01:26 | <&ToxicFrog> | Language core, no builtins, no safety checks, no repl: 4k flash/200b RAM. |
| 01:27 | <&ToxicFrog> | Builtins add 1.4k and 18 bytes. I'm not actually sure where those 18 bytes come from; I would expect 0. |
| 01:28 | <&ToxicFrog> | Oh, wait, yes I am, some of them have string constants in them. |
| 01:29 | <&ToxicFrog> | Turning on SAFETY_CHECKS adds another 2k of flash and 23 bytes of RAM. |
| 01:30 | <&ToxicFrog> | And finally, SERIAL_REPL adds a whopping 5k of flash and 180 bytes of RAM. |
| 01:43 | < RchrdB> | huh how is the one with (__FILE__ ":d") using less memory than the one with ("%s:%d"), __FILE__? |
| 01:43 | <&[R]> | UART? |
| 01:44 | < RchrdB> | shouldn't all those string constants generated by different instances of __FILE__ (for each given file) be smooshed together to share memory either way? |
| 01:55 | <&ToxicFrog> | [R]: the chip that mediates between the microcontroller and the actual serial lines |
| 01:55 | <&ToxicFrog> | RchrdB: the key is the PSTR |
| 01:55 | <&ToxicFrog> | Which is a macro that means "store this string in flash rather than in RAM" |
| 01:56 | < RchrdB> | uh... huh |
| 01:56 | <&ToxicFrog> | Similarly, printf_P is a variant of printf that expects the format string to be in flash and reads it byte-by-byte out of there. |
| 01:56 | < RchrdB> | and is the linker not deduplicating string constants in flash? |
| 01:56 | <&ToxicFrog> | It is |
| 01:56 | <&ToxicFrog> | The bit you're missing is that in the "before" line __FILE__ is outside the PSTR() and thus gets stored in RAM. |
| 01:57 | <&ToxicFrog> | 170 bytes is the difference between storing all the filenames once each in RAM and storing them once each in flash. |
| 01:58 | < RchrdB> | ahhhh |
| 01:59 | <&ToxicFrog> | The total data used is the same, but I have 2k of RAM and 32k of flash, so I want to put as much stuff in flash as possible. |
| 02:31 | <&ToxicFrog> | oh this is exciting |
| 02:31 | <&ToxicFrog> | the AVR has 8-bit registers and 16-bit address space but `long int` is 32 bits |
| 02:31 | <&ToxicFrog> | Do not get these mixed up when calling printf |
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| 04:05 | <&McMartin> | Aha! That's where I'd seen the ATmega named before |
| 04:05 | <&McMartin> | The Commodore SD card reader is powered by an ATmega. |
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| 11:33 | <&ToxicFrog> | I should write a syntax hilighting file for notforth, but I really don't want to. |
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| 12:39 | <&ToxicFrog> | b954f1f Add syntax hilighting rules; update some comments |
| 12:39 | <&ToxicFrog> | I may have a problem |
| 12:41 | <~Vornicus> | You may |
| 12:42 | <&ToxicFrog> | I've successfully broken the dependency on the Arduino serial library, though. |
| 12:42 | <&ToxicFrog> | Not on the Arduino libraries in general, as yet -- they do a lot of hardware initialization stuff I haven't replicated -- but RAM usage is now down to 148 bytes. |
| 12:42 | <&ToxicFrog> | I am quite pleased with that. |
| 12:59 | <~Vornicus> | that is quite good |
| 13:04 | <&ToxicFrog> | Huh. |
| 13:04 | <&ToxicFrog> | this works: |
| 13:04 | <&ToxicFrog> | { . } 1 11 for |
| 13:04 | <&ToxicFrog> | this stackunderflows: |
| 13:04 | <&ToxicFrog> | @. 1 11 for |
| 13:04 | <&ToxicFrog> | They should be eqv. |
| 13:06 | <&ToxicFrog> | They look eqv: |
| 13:06 | <&ToxicFrog> | [0] @. { . } list list |
| 13:06 | <&ToxicFrog> | ## (anonymous) :: bytecode @ 0x1eaca20 |
| 13:06 | <&ToxicFrog> | call native @ 0x401a20 # . |
| 13:06 | <&ToxicFrog> | ## . :: native code @ 0x401a20 |
| 13:08 | <&ToxicFrog> | [0] 0xff @. exec |
| 13:08 | <&ToxicFrog> | zsh: segmentation fault ./notforth |
| 13:08 | <&ToxicFrog> | WELL THEN |
| 13:15 | <&ToxicFrog> | oh hahahaha wait |
| 13:15 | <&ToxicFrog> | This is the bug I found last night while writing documentation, made a note to fix, but haven't fixed yet |
| 13:16 | <&ToxicFrog> | im coder |
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| --- Log closed Mon Jun 19 00:00:18 2017 |