docs/ref/pics/sf-dzy.svg

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="332px" height="512px" viewBox="-0.5 -0.5 332 512" style="background-color: rgb(255, 255, 255);"><defs/><g><rect x="105" y="150" width="120" height="240" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><rect x="0" y="0" width="165" height="130" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe flex-start; width: 163px; height: 1px; padding-top: 65px; margin-left: 2px;"><div style="box-sizing: border-box; font-size: 0; text-align: left; "><div style="display: inline-block; font-size: 10px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div style="font-size: 10px" align="left"><span style="background-color: rgb(245 , 245 , 245)"><font style="font-size: 10px" face="Courier New">int bar(void) {</font></span></div><div style="font-size: 10px" align="left"><span style="background-color: rgb(245 , 245 , 245)"><font style="font-size: 10px" face="Courier New">    </font><font style="font-size: 10px" face="Courier New">int a; scanf("%d", &amp;a);</font><br /></span><div style="font-size: 10px" align="left"><span style="background-color: rgb(245 , 245 , 245)"><font style="font-size: 10px" face="Courier New"><font style="font-size: 10px" face="Courier New">    int b; scanf("%d", &amp;b);</font></font></span></div></div><div style="font-size: 10px" align="left"><span style="background-color: rgb(245 , 245 , 245)"><font style="font-size: 10px" face="Courier New">    int c = 0;</font></span></div><div style="font-size: 10px" align="left"><span style="background-color: rgb(245 , 245 , 245)"><font style="font-size: 10px" face="Courier New">    c = <span style="background-color: rgb(255 , 204 , 204)">b</span> + <span style="background-color: rgb(255 , 204 , 204)">a</span>;</font></span></div><div style="font-size: 10px" align="left"><span style="background-color: rgb(245 , 245 , 245)"><font style="font-size: 10px" face="Courier New">    return c; }</font></span></div><div style="font-size: 10px" align="left"><font style="font-size: 10px" face="Courier New"><span style="background-color: rgb(153 , 255 , 255)">int foo(){return bar();}</span><br /></font></div><div style="font-size: 10px" align="left"><font style="font-size: 10px" face="Courier New"><span style="background-color: rgb(255 , 204 , 153)">int main(){return foo();}</span><br /></font></div></div></div></div></foreignObject><text x="2" y="68" fill="#000000" font-family="Helvetica" font-size="10px">int bar(void) {...</text></switch></g><rect x="105" y="390" width="120" height="60" fill="#ccffff" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 420px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font face="Courier New">foo</font> 的栈帧</div></div></div></foreignObject><text x="165" y="424" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">foo 的栈帧</text></switch></g><rect x="105" y="450" width="120" height="60" fill="#ffcc99" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 480px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font face="Courier New">main</font> 的栈帧</div></div></div></foreignObject><text x="165" y="484" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">main 的栈帧</text></switch></g><path d="M 50 295 C 50 289.48 54.48 285 60 285 L 85 285 C 90.52 285 95 280.52 95 275 C 95 280.52 99.48 285 105 285 L 130 285 C 135.52 285 140 289.48 140 295" fill="none" stroke="#000000" stroke-miterlimit="10" transform="rotate(270,95,285)" pointer-events="all"/><rect x="245" y="260" width="80" height="50" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 285px; margin-left: 285px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; "><p><font face="Courier New">bar</font> 的栈帧</p></div></div></div></foreignObject><text x="285" y="289" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">bar 的栈帧</text></switch></g><path d="M 225 345 Q 250.03 345.03 250.03 390.03 Q 250.03 435.03 231.37 435.01" fill="none" stroke="#666666" stroke-miterlimit="10" stroke-dasharray="1 1" pointer-events="stroke"/><path d="M 226.12 435 L 233.12 431.51 L 231.37 435.01 L 233.11 438.51 Z" fill="#666666" stroke="#666666" stroke-miterlimit="10" pointer-events="all"/><path d="M 295 330 L 231.37 330" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 226.12 330 L 233.12 326.5 L 231.37 330 L 233.12 333.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="55" y="150" width="50" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 160px; margin-left: 80px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">低地址</div></div></div></foreignObject><text x="80" y="164" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">低地址</text></switch></g><rect x="40" y="490" width="50" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 500px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">高地址</div></div></div></foreignObject><text x="65" y="504" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">高地址</text></switch></g><rect x="295" y="320" width="30" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 330px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; "><font face="Courier New">fp</font></div></div></div></foreignObject><text x="310" y="334" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">fp</text></switch></g><rect x="105" y="240" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 255px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">c (==0)</div></div></div></foreignObject><text x="165" y="259" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">c (==0)</text></switch></g><path d="M 130 295 C 130 289.48 134.48 285 140 285 L 225 285 C 230.52 285 235 280.52 235 275 C 235 280.52 239.48 285 245 285 L 330 285 C 335.52 285 340 289.48 340 295" fill="none" stroke="#000000" stroke-miterlimit="10" transform="rotate(90,235,285)" pointer-events="all"/><rect x="25" y="275" width="60" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 285px; margin-left: 55px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">局部变量</div></div></div></foreignObject><text x="55" y="289" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">局部变量</text></switch></g><rect x="105" y="270" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 285px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">b (==12)</div></div></div></foreignObject><text x="165" y="289" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">b (==12)</text></switch></g><rect x="105" y="300" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 315px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>a (==24)</div></div></div></div></foreignObject><text x="165" y="319" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">a (==24)</text></switch></g><rect x="105" y="330" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 345px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>old fp</div></div></div></div></foreignObject><text x="165" y="349" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">old fp</text></switch></g><rect x="105" y="360" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 375px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">return address</div></div></div></foreignObject><text x="165" y="379" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">return address</text></switch></g><rect x="105" y="210" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 225px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">12</div></div></div></foreignObject><text x="165" y="229" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">12</text></switch></g><rect x="105" y="180" width="120" height="30" fill="#f5f5f5" stroke="#666666" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 195px; margin-left: 106px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #333333; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">24</div></div></div></foreignObject><text x="165" y="199" fill="#333333" font-family="Helvetica" font-size="12px" text-anchor="middle">24</text></switch></g><path d="M 67 217.5 C 67 213.36 70.36 210 74.5 210 L 89.5 210 C 93.64 210 97 206.64 97 202.5 C 97 206.64 100.36 210 104.5 210 L 119.5 210 C 123.64 210 127 213.36 127 217.5" fill="none" stroke="#000000" stroke-miterlimit="10" transform="rotate(270,97,210)" pointer-events="all"/><rect x="0" y="200" width="90" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 210px; margin-left: 45px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">表达式运算栈</div></div></div></foreignObject><text x="45" y="214" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">表达式运算栈</text></switch></g><rect x="165" y="0" width="120" height="130" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe flex-start; width: 118px; height: 1px; padding-top: 65px; margin-left: 167px;"><div style="box-sizing: border-box; font-size: 0; text-align: left; "><div style="display: inline-block; font-size: 10px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div><span style="background-color: rgb(255 , 204 , 204)">……</span></div><div><span style="background-color: rgb(255 , 204 , 204)">读取 <font face="Courier New">b</font> 并放到栈顶</span></div><div><span style="background-color: rgb(255 , 204 , 204)">读取 <font face="Courier New">a</font> 并放到栈顶</span></div><div><font face="Courier New">add</font></div><div>将栈顶保存到 <font face="Courier New">c</font></div><div><font face="Courier New">语句完成</font></div><div>……<br /></div></div></div></div></foreignObject><text x="167" y="68" fill="#000000" font-family="Helvetica" font-size="10px">……读取 b 并放到栈顶...</text></switch></g><rect x="0" y="480" width="30" height="30" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 495px; margin-left: 15px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 20px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">1.</div></div></div></foreignObject><text x="15" y="501" fill="#000000" font-family="Helvetica" font-size="20px" text-anchor="middle">1.</text></switch></g><path d="M 294.88 179.94 L 231.37 179.99" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 226.12 180 L 233.11 176.49 L 231.37 179.99 L 233.12 183.49 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="295" y="170" width="30" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 180px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; "><font face="Courier New">sp</font></div></div></div></foreignObject><text x="310" y="184" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">sp</text></switch></g><path d="M 290 360 L 231.37 360" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="stroke"/><path d="M 226.12 360 L 233.12 356.5 L 231.37 360 L 233.12 363.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="290" y="350" width="40" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 360px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; "><font face="Courier New">fp+4</font></div></div></div></foreignObject><text x="310" y="364" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">fp+4</text></switch></g></g><switch><g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/><a transform="translate(0,-5)" xlink:href="https://desk.draw.io/support/solutions/articles/16000042487" target="_blank"><text text-anchor="middle" font-size="10px" x="50%" y="100%">Viewer does not support full SVG 1.1</text></a></switch></svg>