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| <td width="10%" class="headerValue"><a href="../index.html">top level</a> - <a href="index.html">core</a> - malloc.c<span style="font-size: 80%;"> (source / <a href="malloc.c.func-c.html">functions</a>)</span></td> |
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| <td width="5%" class="headerCovTableHead">Coverage</td> |
| <td width="5%" class="headerCovTableHead" title="Covered + Uncovered code">Total</td> |
| <td width="5%" class="headerCovTableHead" title="Exercised code only">Hit</td> |
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| <td class="headerItem">Test:</td> |
| <td class="headerValue">skiboot.info</td> |
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| <td class="headerItem">Lines:</td> |
| <td class="headerCovTableEntryMed">87.5 %</td> |
| <td class="headerCovTableEntry">48</td> |
| <td class="headerCovTableEntry">42</td> |
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| <td class="headerItem">Test Date:</td> |
| <td class="headerValue">2025-10-14 13:37:15</td> |
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| <td class="headerItem">Functions:</td> |
| <td class="headerCovTableEntryHi">100.0 %</td> |
| <td class="headerCovTableEntry">6</td> |
| <td class="headerCovTableEntry">6</td> |
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| <td class="headerCovTableEntryHi">-</td> |
| <td class="headerCovTableEntry">0</td> |
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| <pre class="sourceHeading"> Branch data Line data Source code</pre> |
| <pre class="source"> |
| <span id="L1"><span class="lineNum"> 1</span> : : // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later</span> |
| <span id="L2"><span class="lineNum"> 2</span> : : /*</span> |
| <span id="L3"><span class="lineNum"> 3</span> : : * Implement malloc()/free() etc on top of our memory region allocator,</span> |
| <span id="L4"><span class="lineNum"> 4</span> : : * which provides mem_alloc()/mem_free().</span> |
| <span id="L5"><span class="lineNum"> 5</span> : : *</span> |
| <span id="L6"><span class="lineNum"> 6</span> : : * Copyright 2013-2015 IBM Corp.</span> |
| <span id="L7"><span class="lineNum"> 7</span> : : */</span> |
| <span id="L8"><span class="lineNum"> 8</span> : : </span> |
| <span id="L9"><span class="lineNum"> 9</span> : : #include <mem_region.h></span> |
| <span id="L10"><span class="lineNum"> 10</span> : : #include <lock.h></span> |
| <span id="L11"><span class="lineNum"> 11</span> : : #include <skiboot.h></span> |
| <span id="L12"><span class="lineNum"> 12</span> : : #include <stack.h></span> |
| <span id="L13"><span class="lineNum"> 13</span> : : #include <string.h></span> |
| <span id="L14"><span class="lineNum"> 14</span> : : #include <mem_region-malloc.h></span> |
| <span id="L15"><span class="lineNum"> 15</span> : : </span> |
| <span id="L16"><span class="lineNum"> 16</span> : : #define DEFAULT_ALIGN __alignof__(long)</span> |
| <span id="L17"><span class="lineNum"> 17</span> : : </span> |
| <span id="L18"><span class="lineNum"> 18</span> :<span class="tlaGNC tlaBgGNC"> 4316 : void *__memalign(size_t blocksize, size_t bytes, const char *location)</span></span> |
| <span id="L19"><span class="lineNum"> 19</span> : : {</span> |
| <span id="L20"><span class="lineNum"> 20</span> : : void *p;</span> |
| <span id="L21"><span class="lineNum"> 21</span> : : </span> |
| <span id="L22"><span class="lineNum"> 22</span> :<span class="tlaGNC"> 4316 : lock(&skiboot_heap.free_list_lock);</span></span> |
| <span id="L23"><span class="lineNum"> 23</span> :<span class="tlaGNC"> 4316 : p = mem_alloc(&skiboot_heap, bytes, blocksize, location);</span></span> |
| <span id="L24"><span class="lineNum"> 24</span> :<span class="tlaGNC"> 4316 : unlock(&skiboot_heap.free_list_lock);</span></span> |
| <span id="L25"><span class="lineNum"> 25</span> : : </span> |
| <span id="L26"><span class="lineNum"> 26</span> :<span class="tlaGNC"> 4316 : return p;</span></span> |
| <span id="L27"><span class="lineNum"> 27</span> : : }</span> |
| <span id="L28"><span class="lineNum"> 28</span> : : </span> |
| <span id="L29"><span class="lineNum"> 29</span> :<span class="tlaGNC"> 4316 : void *__malloc(size_t bytes, const char *location)</span></span> |
| <span id="L30"><span class="lineNum"> 30</span> : : {</span> |
| <span id="L31"><span class="lineNum"> 31</span> :<span class="tlaGNC"> 4316 : return __memalign(DEFAULT_ALIGN, bytes, location);</span></span> |
| <span id="L32"><span class="lineNum"> 32</span> : : }</span> |
| <span id="L33"><span class="lineNum"> 33</span> : : </span> |
| <span id="L34"><span class="lineNum"> 34</span> :<span class="tlaGNC"> 161 : static bool check_heap_ptr(const void *p)</span></span> |
| <span id="L35"><span class="lineNum"> 35</span> : : {</span> |
| <span id="L36"><span class="lineNum"> 36</span> :<span class="tlaGNC"> 161 : struct mem_region *region = &skiboot_heap;</span></span> |
| <span id="L37"><span class="lineNum"> 37</span> :<span class="tlaGNC"> 161 : unsigned long ptr = (unsigned long)p;</span></span> |
| <span id="L38"><span class="lineNum"> 38</span> : : </span> |
| <span id="L39"><span class="lineNum"> 39</span> :<span class="tlaGNC"> 161 : if (!ptr)</span></span> |
| <span id="L40"><span class="lineNum"> 40</span> :<span class="tlaGNC"> 3 : return true;</span></span> |
| <span id="L41"><span class="lineNum"> 41</span> : : </span> |
| <span id="L42"><span class="lineNum"> 42</span> :<span class="tlaGNC"> 158 : if (ptr < region->start || ptr > region->start + region->len) {</span></span> |
| <span id="L43"><span class="lineNum"> 43</span> :<span class="tlaUNC tlaBgUNC"> 0 : prerror("Trying to free() a pointer outside heap. Possibly local_alloc().\n");</span></span> |
| <span id="L44"><span class="lineNum"> 44</span> :<span class="tlaUNC"> 0 : backtrace();</span></span> |
| <span id="L45"><span class="lineNum"> 45</span> :<span class="tlaUNC"> 0 : return false;</span></span> |
| <span id="L46"><span class="lineNum"> 46</span> : : }</span> |
| <span id="L47"><span class="lineNum"> 47</span> :<span class="tlaGNC tlaBgGNC"> 158 : return true;</span></span> |
| <span id="L48"><span class="lineNum"> 48</span> : : }</span> |
| <span id="L49"><span class="lineNum"> 49</span> : : </span> |
| <span id="L50"><span class="lineNum"> 50</span> :<span class="tlaGNC"> 152 : void __free(void *p, const char *location)</span></span> |
| <span id="L51"><span class="lineNum"> 51</span> : : {</span> |
| <span id="L52"><span class="lineNum"> 52</span> :<span class="tlaGNC"> 152 : if (!check_heap_ptr(p))</span></span> |
| <span id="L53"><span class="lineNum"> 53</span> :<span class="tlaUNC tlaBgUNC"> 0 : return;</span></span> |
| <span id="L54"><span class="lineNum"> 54</span> : : </span> |
| <span id="L55"><span class="lineNum"> 55</span> :<span class="tlaGNC tlaBgGNC"> 152 : lock(&skiboot_heap.free_list_lock);</span></span> |
| <span id="L56"><span class="lineNum"> 56</span> :<span class="tlaGNC"> 152 : mem_free(&skiboot_heap, p, location);</span></span> |
| <span id="L57"><span class="lineNum"> 57</span> :<span class="tlaGNC"> 152 : unlock(&skiboot_heap.free_list_lock);</span></span> |
| <span id="L58"><span class="lineNum"> 58</span> : : }</span> |
| <span id="L59"><span class="lineNum"> 59</span> : : </span> |
| <span id="L60"><span class="lineNum"> 60</span> :<span class="tlaGNC"> 9 : void *__realloc(void *ptr, size_t size, const char *location)</span></span> |
| <span id="L61"><span class="lineNum"> 61</span> : : {</span> |
| <span id="L62"><span class="lineNum"> 62</span> : : void *newptr;</span> |
| <span id="L63"><span class="lineNum"> 63</span> : : </span> |
| <span id="L64"><span class="lineNum"> 64</span> :<span class="tlaGNC"> 9 : if (!check_heap_ptr(ptr))</span></span> |
| <span id="L65"><span class="lineNum"> 65</span> :<span class="tlaUNC tlaBgUNC"> 0 : return NULL;</span></span> |
| <span id="L66"><span class="lineNum"> 66</span> : : </span> |
| <span id="L67"><span class="lineNum"> 67</span> : : /* Two classic malloc corner cases. */</span> |
| <span id="L68"><span class="lineNum"> 68</span> :<span class="tlaGNC tlaBgGNC"> 9 : if (!size) {</span></span> |
| <span id="L69"><span class="lineNum"> 69</span> :<span class="tlaGNC"> 1 : __free(ptr, location);</span></span> |
| <span id="L70"><span class="lineNum"> 70</span> :<span class="tlaGNC"> 1 : return NULL;</span></span> |
| <span id="L71"><span class="lineNum"> 71</span> : : }</span> |
| <span id="L72"><span class="lineNum"> 72</span> :<span class="tlaGNC"> 8 : if (!ptr)</span></span> |
| <span id="L73"><span class="lineNum"> 73</span> :<span class="tlaGNC"> 3 : return __malloc(size, location);</span></span> |
| <span id="L74"><span class="lineNum"> 74</span> : : </span> |
| <span id="L75"><span class="lineNum"> 75</span> :<span class="tlaGNC"> 5 : lock(&skiboot_heap.free_list_lock);</span></span> |
| <span id="L76"><span class="lineNum"> 76</span> :<span class="tlaGNC"> 5 : if (mem_resize(&skiboot_heap, ptr, size, location)) {</span></span> |
| <span id="L77"><span class="lineNum"> 77</span> :<span class="tlaGNC"> 3 : newptr = ptr;</span></span> |
| <span id="L78"><span class="lineNum"> 78</span> : : } else {</span> |
| <span id="L79"><span class="lineNum"> 79</span> :<span class="tlaGNC"> 2 : newptr = mem_alloc(&skiboot_heap, size, DEFAULT_ALIGN,</span></span> |
| <span id="L80"><span class="lineNum"> 80</span> : : location);</span> |
| <span id="L81"><span class="lineNum"> 81</span> :<span class="tlaGNC"> 2 : if (newptr) {</span></span> |
| <span id="L82"><span class="lineNum"> 82</span> :<span class="tlaGNC"> 1 : size_t copy = mem_allocated_size(ptr);</span></span> |
| <span id="L83"><span class="lineNum"> 83</span> :<span class="tlaGNC"> 1 : if (copy > size)</span></span> |
| <span id="L84"><span class="lineNum"> 84</span> :<span class="tlaUNC tlaBgUNC"> 0 : copy = size;</span></span> |
| <span id="L85"><span class="lineNum"> 85</span> :<span class="tlaGNC tlaBgGNC"> 1 : memcpy(newptr, ptr, copy);</span></span> |
| <span id="L86"><span class="lineNum"> 86</span> :<span class="tlaGNC"> 1 : mem_free(&skiboot_heap, ptr, location);</span></span> |
| <span id="L87"><span class="lineNum"> 87</span> : : }</span> |
| <span id="L88"><span class="lineNum"> 88</span> : : }</span> |
| <span id="L89"><span class="lineNum"> 89</span> :<span class="tlaGNC"> 5 : unlock(&skiboot_heap.free_list_lock);</span></span> |
| <span id="L90"><span class="lineNum"> 90</span> :<span class="tlaGNC"> 5 : return newptr;</span></span> |
| <span id="L91"><span class="lineNum"> 91</span> : : }</span> |
| <span id="L92"><span class="lineNum"> 92</span> : : </span> |
| <span id="L93"><span class="lineNum"> 93</span> :<span class="tlaGNC"> 18 : void *__zalloc(size_t bytes, const char *location)</span></span> |
| <span id="L94"><span class="lineNum"> 94</span> : : {</span> |
| <span id="L95"><span class="lineNum"> 95</span> :<span class="tlaGNC"> 18 : void *p = __malloc(bytes, location);</span></span> |
| <span id="L96"><span class="lineNum"> 96</span> : : </span> |
| <span id="L97"><span class="lineNum"> 97</span> :<span class="tlaGNC"> 18 : if (p)</span></span> |
| <span id="L98"><span class="lineNum"> 98</span> :<span class="tlaGNC"> 17 : memset(p, 0, bytes);</span></span> |
| <span id="L99"><span class="lineNum"> 99</span> :<span class="tlaGNC"> 18 : return p;</span></span> |
| <span id="L100"><span class="lineNum"> 100</span> : : }</span> |
| </pre> |
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