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cbwang505 提交于 2020-01-04 20:32 . init
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<a href="#func-members">函数</a> </div>
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<div class="title">heap.c 文件参考</div> </div>
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<div class="textblock"><code>#include &quot;<a class="el" href="a03629_source.html">precomp.h</a>&quot;</code><br />
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<p><a href="a00698_source.html">浏览源代码.</a></p>
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函数</h2></td></tr>
<tr class="memitem:ab2a1196af656f15f16f8593827fec182"><td class="memItemLeft" align="right" valign="top">NTSTATUS&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00698.html#ab2a1196af656f15f16f8593827fec182">UserCommitMemory</a> (PVOID pBase, PVOID *ppCommit, PULONG pCommitSize)</td></tr>
<tr class="separator:ab2a1196af656f15f16f8593827fec182"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a74b16ad9154f24c6f8e1408a92bb5570"><td class="memItemLeft" align="right" valign="top">PVOID&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00698.html#a74b16ad9154f24c6f8e1408a92bb5570">UserCreateHeap</a> (HANDLE hSection, PVOID pvBaseAddress, <a class="el" href="a00563.html#a074685e97e89d6aa2accdfcb82328699">DWORD</a> dwSize)</td></tr>
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<h2 class="groupheader">函数说明</h2>
<a id="ab2a1196af656f15f16f8593827fec182"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab2a1196af656f15f16f8593827fec182">&#9670;&nbsp;</a></span>UserCommitMemory()</h2>
<div class="memitem">
<div class="memproto">
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<tr>
<td class="memname">NTSTATUS UserCommitMemory </td>
<td>(</td>
<td class="paramtype">PVOID&#160;</td>
<td class="paramname"><em>pBase</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">PVOID *&#160;</td>
<td class="paramname"><em>ppCommit</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">PULONG&#160;</td>
<td class="paramname"><em>pCommitSize</em>&#160;</td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p class="definition">在文件 <a class="el" href="a00698_source.html">heap.c</a><a class="el" href="a00698_source.html#l00015">15</a> 行定义.</p>
<div class="fragment"><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;{</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <a class="code" href="a02901.html">PDESKTOPVIEW</a> pdv;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; <a class="code" href="a00563.html#a074685e97e89d6aa2accdfcb82328699">DWORD</a> dwCommitOffset;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; <a class="code" href="a02809.html">PWINDOWSTATION</a> pwinsta;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <a class="code" href="a02801.html">PDESKTOP</a> pdesk;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; PBYTE pUserBase;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; NTSTATUS Status;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment"> * If this is a system thread, we have no view of the desktop</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment"> * and must map it in. Fortunately, this does not happen often.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keywordflow">if</span> (IS_SYSTEM_THREAD(PsGetCurrentThread())) {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment"> * Find the desktop that owns the section.</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keywordflow">for</span> (pwinsta = <a class="code" href="a03257.html#ad9f551216ba73947832de96844110fca">grpwinstaList</a>; pwinsta; pwinsta = pwinsta-&gt;<a class="code" href="a02809.html#acdccfdf2387c6fcf147bba1ee15d5939">rpwinstaNext</a>) {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordflow">for</span> (pdesk = pwinsta-&gt;<a class="code" href="a02809.html#aafbda282c78d875d4491cf817366dc1b">rpdeskList</a>; pdesk; pdesk = pdesk-&gt;<a class="code" href="a02801.html#ace92d08d0736aef3f0b73273a6e3e5f7">rpdeskNext</a>) {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordflow">if</span> (pdesk-&gt;<a class="code" href="a02801.html#a76d4881aa4c15330103e83a80e6b5dc7">pDeskInfo</a>-&gt;<a class="code" href="a02609.html#a75669b702bc6c694a3cf53480238cd1e">pvDesktopBase</a> == pBase)</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keywordflow">goto</span> FoundIt;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; }</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; }</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;FoundIt:</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">if</span> (pwinsta == NULL)</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">return</span> STATUS_NO_MEMORY;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; </div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="comment"> * Map the section into the current process and commit the</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="comment"> * first page of the section.</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; dwCommitOffset = (ULONG)((PBYTE)*ppCommit - (PBYTE)pBase);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; Status = <a class="code" href="a00680.html#a77b4a808c8bc2285c46b6cf1b1415958">CommitReadOnlyMemory</a>(pdesk-&gt;<a class="code" href="a02801.html#ac80b7bb1e8592073677fd05e42351a80">hsectionDesktop</a>, <a class="code" href="a03665.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>,</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; dwCommitOffset);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="comment"> * Find the current process&#39; view of the desktop</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordflow">for</span> (pdv = PpiCurrent()-&gt;pdvList; pdv != NULL; pdv = pdv-&gt;<a class="code" href="a02901.html#a0152e70c5e5553e5908f9f08658f95c8">pdvNext</a>) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">if</span> (pdv-&gt;<a class="code" href="a02901.html#add45d38ef4796b9269d0351169ba817c">pdesk</a>-&gt;<a class="code" href="a02801.html#a76d4881aa4c15330103e83a80e6b5dc7">pDeskInfo</a>-&gt;<a class="code" href="a02609.html#a75669b702bc6c694a3cf53480238cd1e">pvDesktopBase</a> == pBase)</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; }</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <a class="code" href="a00371.html#a162a73e20dfabca084a3ebb4581631a8">UserAssert</a>(pdv);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; </div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="comment"> * Commit the memory</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; pUserBase = (PVOID)((PBYTE)*ppCommit - pdv-&gt;<a class="code" href="a02901.html#acbf48a5d29178c49f4dd41065b66ed17">ulClientDelta</a>);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; Status = ZwAllocateVirtualMemory(NtCurrentProcess(),</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; &amp;pUserBase,</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; 0,</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; pCommitSize,</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; MEM_COMMIT,</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; PAGE_EXECUTE_READ</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; );</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keywordflow">if</span> (NT_SUCCESS(Status))</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; *ppCommit = (PVOID)((PBYTE)pUserBase + pdv-&gt;<a class="code" href="a02901.html#acbf48a5d29178c49f4dd41065b66ed17">ulClientDelta</a>);</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; }</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">return</span> Status;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;}</div>
</div><!-- fragment -->
<p class="reference">引用了 <a class="el" href="a00680_source.html#l00260">CommitReadOnlyMemory()</a>, <a class="el" href="a00563_source.html#l00175">DWORD</a>, <a class="el" href="a03257_source.html#l00182">grpwinstaList</a>, <a class="el" href="a00899_source.html#l01723">tagDESKTOP::hsectionDesktop</a>, <a class="el" href="a03665_source.html#l01258">PAGE_SIZE</a>, <a class="el" href="a00899_source.html#l02378">tagDESKTOPVIEW::pdesk</a>, <a class="el" href="a00899_source.html#l01706">tagDESKTOP::pDeskInfo</a>, <a class="el" href="a00899_source.html#l02377">tagDESKTOPVIEW::pdvNext</a>, <a class="el" href="a00365_source.html#l01601">tagDESKTOPINFO::pvDesktopBase</a>, <a class="el" href="a00899_source.html#l01746">tagWINDOWSTATION::rpdeskList</a>, <a class="el" href="a00899_source.html#l01709">tagDESKTOP::rpdeskNext</a>, <a class="el" href="a00899_source.html#l01745">tagWINDOWSTATION::rpwinstaNext</a>, <a class="el" href="a00899_source.html#l02379">tagDESKTOPVIEW::ulClientDelta</a> , 以及 <a class="el" href="a00950_source.html#l00117">UserAssert</a>.</p>
<p class="reference">被这些函数引用 <a class="el" href="a00698_source.html#l00082">UserCreateHeap()</a>.</p>
</div>
</div>
<a id="a74b16ad9154f24c6f8e1408a92bb5570"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a74b16ad9154f24c6f8e1408a92bb5570">&#9670;&nbsp;</a></span>UserCreateHeap()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">PVOID UserCreateHeap </td>
<td>(</td>
<td class="paramtype">HANDLE&#160;</td>
<td class="paramname"><em>hSection</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">PVOID&#160;</td>
<td class="paramname"><em>pvBaseAddress</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a00563.html#a074685e97e89d6aa2accdfcb82328699">DWORD</a>&#160;</td>
<td class="paramname"><em>dwSize</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p class="definition">在文件 <a class="el" href="a00698_source.html">heap.c</a><a class="el" href="a00698_source.html#l00082">82</a> 行定义.</p>
<div class="fragment"><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;{</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; PVOID pUserBase;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; ULONG ulViewSize;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; LARGE_INTEGER liOffset;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; PEPROCESS Process = PsGetCurrentProcess();</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; RTL_HEAP_PARAMETERS HeapParams;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; NTSTATUS Status;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="comment"> * Map the section into the current process and commit the</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="comment"> * first page of the section.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; ulViewSize = 0;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; liOffset.QuadPart = 0;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; pUserBase = NULL;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; Status = MmMapViewOfSection(hSection, Process,</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; &amp;pUserBase, 0, <a class="code" href="a03665.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>, &amp;liOffset, &amp;ulViewSize, ViewUnmap,</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; SEC_NO_CHANGE, PAGE_EXECUTE_READ);</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordflow">if</span> (!NT_SUCCESS(Status))</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; MmUnmapViewOfSection(Process, pUserBase);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="comment"> * We now have a committed page to create the heap in.</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; RtlZeroMemory(&amp;HeapParams, <span class="keyword">sizeof</span>(HeapParams));</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; HeapParams.Length = <span class="keyword">sizeof</span>(HeapParams);</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; HeapParams.InitialCommit = <a class="code" href="a03665.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; HeapParams.InitialReserve = dwSize;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; HeapParams.CommitRoutine = <a class="code" href="a00698.html#ab2a1196af656f15f16f8593827fec182">UserCommitMemory</a>;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordflow">return</span> RtlCreateHeap(</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY,</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; pvBaseAddress,</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; dwSize,</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <a class="code" href="a03665.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>,</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; NULL,</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; &amp;HeapParams</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; );</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;}</div>
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<p class="reference">引用了 <a class="el" href="a03665_source.html#l01258">PAGE_SIZE</a> , 以及 <a class="el" href="a00698_source.html#l00015">UserCommitMemory()</a>.</p>
<p class="reference">被这些函数引用 <a class="el" href="a00656_source.html#l01841">CreateDesktopHeap()</a>.</p>
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<div class="ttc" id="aa00680_html_a77b4a808c8bc2285c46b6cf1b1415958"><div class="ttname"><a href="a00680.html#a77b4a808c8bc2285c46b6cf1b1415958">CommitReadOnlyMemory</a></div><div class="ttdeci">NTSTATUS CommitReadOnlyMemory(HANDLE hSection, ULONG cbCommit, DWORD dwCommitOffset)</div><div class="ttdef"><b>Definition:</b> <a href="a00680_source.html#l00260">ex.c:260</a></div></div>
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