preventing race cond in refreshCache() - getwtxt

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author	Ben Morrison <ben@gbmor.dev>	2019-05-27 21:10:39 -0400
committer	Ben Morrison <ben@gbmor.dev>	2019-05-27 23:07:15 -0400
commit	c6ced3e74b52df4ed8a63868f86e095058c41100 (patch)
tree	d7568ca8a651b7e4711bcd3fb31c9d0a34942aa7 /.travis.yml
parent	d6d0c18cad6426a0562d19b2b0c66a7c2bb4e2c5 (diff)
download	getwtxt-c6ced3e74b52df4ed8a63868f86e095058c41100.tar.gz

preventing race cond in refreshCache()

Diffstat (limited to '.travis.yml')

0 files changed, 0 insertions, 0 deletions

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Mu - 315stack-debug.subx</title> <meta name="Generator" content="Vim/8.2"> <meta name="plugin-version" content="vim8.1_v2"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=,use_input_for_pc=fallback"> <meta name="colorscheme" content="minimal-light"> <style>  </style> <script>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/main/315stack-debug.subx'>https://github.com/akkartik/mu/blob/main/315stack-debug.subx</a> <pre id='vimCodeElement'> 1 # The stack shouldn't grow into the code area. 2 3 == code 4 5 check-stack: 6 # . prologue 7 55/push-ebp 8 89/<- %ebp 4/r32/esp 9 # . save registers 10 50/push-eax 11 # 12 89/<- %eax 4/r32/esp 13 3d/compare-eax-and 0x01000000/imm32 14 { 15 7f/jump-if-> break/disp8 16 (<a href='317abort.subx.html#L5'>abort</a> "stack overflow") 17 } 18 $check-stack:end: 19 # . restore registers 20 58/pop-to-eax 21 # . epilogue 22 89/<- %esp 5/r32/ebp 23 5d/pop-to-ebp 24 c3/return 25 26 show-stack-state: 27 # . prologue 28 55/push-ebp 29 89/<- %ebp 4/r32/esp 30 # . save registers 31 50/push-eax 32 51/push-ecx 33 52/push-edx 34 # 35 89/<- %edx 4/r32/esp 36 # save old cursor position 37 (<a href='500fake-screen.mu.html#L174'>cursor-position</a> 0) # => eax, ecx 38 # print at top-right 39 (<a href='500fake-screen.mu.html#L190'>set-cursor-position</a> 0 0x70 0) 40 (<a href='501draw-text.mu.html#L333'>draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen</a> 0 %edx 0xf 0xc) 41 # restore cursor position 42 (<a href='500fake-screen.mu.html#L190'>set-cursor-position</a> %eax %ecx) 43 $show-stack-state:end: 44 # . restore registers 45 5a/pop-to-edx 46 59/pop-to-ecx 47 58/pop-to-eax 48 # . epilogue 49 89/<- %esp 5/r32/ebp 50 5d/pop-to-ebp 51 c3/return 52 53 # Helper for debugging deeply recursive calls without logs or traces. 54 # Turn it on, insert calls in the right places, and you get a terse sense of 55 # important parts of the call stack. A poor sophont's stack trace. 56 debug-print: # x: (addr array byte), fg: int, bg: int # x is very short; usually a single character 57 # . prologue 58 55/push-ebp 59 89/<- %ebp 4/r32/esp 60 # . save registers 61 50/push-eax 62 51/push-ecx 63 # 64 { 65 81 7/subop/compare *<a href='315stack-debug.subx.html#L121'>Really-debug-print</a> 0/imm32/false 66 74/jump-if-= break/disp8 67 (<a href='501draw-text.mu.html#L279'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> 0 *(ebp+8) *(ebp+0xc) *(ebp+0x10)) 68 # clear the screen and continue if we got too close to the bottom 69 (<a href='500fake-screen.mu.html#L174'>cursor-position</a> 0) # => eax, ecx 70 81 7/subop/compare %ecx 0x28/imm32 71 75/jump-if-!= break/disp8 72 (<a href='500fake-screen.mu.html#L251'>clear-screen</a> 0) 73 (<a href='500fake-screen.mu.html#L190'>set-cursor-position</a> 0 0 0) 74 } 75 $debug-print:end: 76 # . restore registers 77 59/pop-to-ecx 78 58/pop-to-eax 79 # . epilogue 80 89/<- %esp 5/r32/ebp 81 5d/pop-to-ebp 82 c3/return 83 84 debug-print?: # -> _/eax: boolean 85 # . prologue 86 55/push-ebp 87 89/<- %ebp 4/r32/esp 88 # 89 8b/-> *<a href='315stack-debug.subx.html#L121'>Really-debug-print</a> 0/r32/eax 90 $debug-print?:end: 91 # . epilogue 92 89/<- %esp 5/r32/ebp 93 5d/pop-to-ebp 94 c3/return 95 96 turn-on-debug-print: 97 # . prologue 98 55/push-ebp 99 89/<- %ebp 4/r32/esp 100 # 101 c7 0/subop/copy *<a href='315stack-debug.subx.html#L121'>Really-debug-print</a> 1/imm32/true 102 $turn-on-debug-print:end: 103 # . epilogue 104 89/<- %esp 5/r32/ebp 105 5d/pop-to-ebp 106 c3/return 107 108 turn-off-debug-print: 109 # . prologue 110 55/push-ebp 111 89/<- %ebp 4/r32/esp 112 # 113 c7 0/subop/copy *<a href='315stack-debug.subx.html#L121'>Really-debug-print</a> 0/imm32/false 114 $turn-off-debug-print:end: 115 # . epilogue 116 89/<- %esp 5/r32/ebp 117 5d/pop-to-ebp 118 c3/return 119 120 == data 121 Really-debug-print: 122 0/imm32/false 123 #? 1/imm32/true </pre> </body> </html>


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