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<h1>stack.c</h1><a href="stack_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="preprocessor">#ifndef _STACK_C_</span>
00002 <span class="preprocessor"></span><span class="preprocessor">#define _STACK_C_</span>
00003 <span class="preprocessor"></span><span class="comment">/* -*- linux-c -*- */</span>
00004 <span class="comment"></span>
00005 <span class="comment">/** @file stack.c</span>
00006 <span class="comment"> * @brief Stack Tracing Functions</span>
00007 <span class="comment"> */</span>
00008 <span class="comment"></span>
00009 <span class="comment">/** @addtogroup stack Stack Tracing Functions</span>
00010 <span class="comment"> * @{</span>
00011 <span class="comment"> */</span>
00012
00013 <span class="preprocessor">#include "sym.c"</span>
00014
00015 <span class="keyword">static</span> int (*_stp_kta)(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr)=(<span class="keywordtype">void</span> *)KTA;
00016
00017 <span class="preprocessor">#ifdef __x86_64__</span>
00018 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keywordtype">void</span> __stp_stack_print (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *stack, <span class="keywordtype">int</span> verbose, <span class="keywordtype">int</span> levels)
00019 {
00020 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00021
00022 <span class="keywordflow">if</span> (verbose)
00023 _stp_print ("trace for %d (%s)\n", current->pid, current->comm);
00024
00025 while (((<span class="keywordtype">long</span>) stack & (THREAD_SIZE-1)) != 0) {
00026 addr = *stack++;
00027 <span class="keywordflow">if</span> (_stp_kta(addr)) {
00028 <span class="keywordflow">if</span> (verbose)
00029 _stp_symbol_print (addr);
00030 else
00031 _stp_print ("0x%lx ", addr);
00032 }
00033 }
00034 _stp_print_str ("\n");
00035 }
00036
00037
00038 static <span class="keywordtype">char</span> *__stp_stack_sprint (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *stack, <span class="keywordtype">int</span> verbose, <span class="keywordtype">int</span> levels)
00039 {
00040 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00041 <span class="keywordtype">char</span> *ptr = _stp_scbuf_cur();
00042 <span class="keywordflow">while</span> (((<span class="keywordtype">long</span>) stack & (THREAD_SIZE-1)) != 0) {
00043 addr = *stack++;
00044 <span class="keywordflow">if</span> (_stp_kta(addr)) {
00045 <span class="keywordflow">if</span> (verbose)
00046 _stp_symbol_sprint (addr);
00047 else
00048 _stp_sprint ("0x%lx ", addr);
00049 }
00050 }
00051 return ptr;
00052 }
00053
00054 #else <span class="comment">/* i386 */</span>
00055
00056 static inline <span class="keywordtype">int</span> valid_stack_ptr (struct thread_info *tinfo, <span class="keywordtype">void</span> *p)
00057 {
00058 <span class="keywordflow">return</span> p > (<span class="keywordtype">void</span> *)tinfo &&
00059 p < (<span class="keywordtype">void</span> *)tinfo + THREAD_SIZE - 3;
00060 }
00061
00062 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> _stp_print_context_stack (
00063 <span class="keyword">struct</span> thread_info *tinfo,
00064 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *stack,
00065 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> ebp )
00066 {
00067 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00068
00069 <span class="preprocessor">#ifdef CONFIG_FRAME_POINTER</span>
00070 <span class="preprocessor"></span> <span class="keywordflow">while</span> (valid_stack_ptr(tinfo, (<span class="keywordtype">void</span> *)ebp)) {
00071 addr = *(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *)(ebp + 4);
00072 <a class="code" href="group__sym.html#ga3">_stp_symbol_print</a> (addr);
00073 <a class="code" href="group__io.html#ga2">_stp_print_str</a>(<span class="stringliteral">"\n"</span>);
00074 ebp = *(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *)ebp;
00075 }
00076 <span class="preprocessor">#else</span>
00077 <span class="preprocessor"></span> <span class="keywordflow">while</span> (valid_stack_ptr(tinfo, stack)) {
00078 addr = *stack++;
00079 <span class="keywordflow">if</span> (_stp_kta (addr)) {
00080 <a class="code" href="group__sym.html#ga3">_stp_symbol_print</a> (addr);
00081 <a class="code" href="group__io.html#ga2">_stp_print_str</a> (<span class="stringliteral">"\n"</span>);
00082 }
00083 }
00084 <span class="preprocessor">#endif</span>
00085 <span class="preprocessor"></span> <span class="keywordflow">return</span> ebp;
00086 }
00087
00088 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> _stp_sprint_context_stack (
00089 <span class="keyword">struct</span> thread_info *tinfo,
00090 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *stack,
00091 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> ebp )
00092 {
00093 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00094
00095 <span class="preprocessor">#ifdef CONFIG_FRAME_POINTER</span>
00096 <span class="preprocessor"></span> <span class="keywordflow">while</span> (valid_stack_ptr(tinfo, (<span class="keywordtype">void</span> *)ebp)) {
00097 addr = *(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *)(ebp + 4);
00098 <a class="code" href="group__sym.html#ga2">_stp_symbol_sprint</a> (addr);
00099 <a class="code" href="group__scbuf.html#ga3">_stp_sprint_str</a>(<span class="stringliteral">"\n"</span>);
00100 ebp = *(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *)ebp;
00101 }
00102 <span class="preprocessor">#else</span>
00103 <span class="preprocessor"></span> <span class="keywordflow">while</span> (valid_stack_ptr(tinfo, stack)) {
00104 addr = *stack++;
00105 <span class="keywordflow">if</span> (_stp_kta (addr)) {
00106 <a class="code" href="group__sym.html#ga2">_stp_symbol_sprint</a> (addr);
00107 <a class="code" href="group__scbuf.html#ga3">_stp_sprint_str</a> (<span class="stringliteral">"\n"</span>);
00108 }
00109 }
00110 <span class="preprocessor">#endif</span>
00111 <span class="preprocessor"></span> <span class="keywordflow">return</span> ebp;
00112 }
00113
00114 <span class="keyword">static</span> <span class="keywordtype">void</span> __stp_stack_print (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *stack, <span class="keywordtype">int</span> verbose, <span class="keywordtype">int</span> levels)
00115 {
00116 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> ebp;
00117
00118 <span class="comment">/* Grab ebp right from our regs */</span>
00119 <span class="keyword">asm</span> (<span class="stringliteral">"movl %%ebp, %0"</span> : <span class="stringliteral">"=r"</span> (ebp) : );
00120
00121 <span class="keywordflow">while</span> (stack) {
00122 <span class="keyword">struct </span>thread_info *context = (<span class="keyword">struct </span>thread_info *)
00123 ((<span class="keywordtype">unsigned</span> long)stack & (~(THREAD_SIZE - 1)));
00124 ebp = _stp_print_context_stack (context, stack, ebp);
00125 stack = (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>*)context->previous_esp;
00126 }
00127 }
00128
00129 <span class="keyword">static</span> <span class="keywordtype">void</span> __stp_stack_sprint (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> *stack, <span class="keywordtype">int</span> verbose, <span class="keywordtype">int</span> levels)
00130 {
00131 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> ebp;
00132
00133 <span class="comment">/* Grab ebp right from our regs */</span>
00134 <span class="keyword">asm</span> (<span class="stringliteral">"movl %%ebp, %0"</span> : <span class="stringliteral">"=r"</span> (ebp) : );
00135
00136 <span class="keywordflow">while</span> (stack) {
00137 <span class="keyword">struct </span>thread_info *context = (<span class="keyword">struct </span>thread_info *)
00138 ((<span class="keywordtype">unsigned</span> long)stack & (~(THREAD_SIZE - 1)));
00139 ebp = _stp_sprint_context_stack (context, stack, ebp);
00140 stack = (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>*)context->previous_esp;
00141 }
00142 }
00143
00144 <span class="preprocessor">#endif </span><span class="comment">/* i386 */</span>
00145 <span class="comment"></span>
00146 <span class="comment">/** Print stack dump.</span>
00147 <span class="comment"> * Prints a stack dump to the trace buffer.</span>
00148 <span class="comment"> * @param verbose Verbosity:</span>
00149 <span class="comment"> */</span>
00150
<a name="l00151"></a><a class="code" href="group__stack.html#ga6">00151</a> <span class="keywordtype">void</span> <a class="code" href="group__stack.html#ga6">_stp_stack_print</a> (<span class="keywordtype">int</span> verbose, <span class="keywordtype">int</span> levels)
00152 {
00153 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> stack;
00154 <span class="keywordflow">return</span> __stp_stack_print (&stack, verbose, levels);
00155 }
00156
00157 <span class="keywordtype">char</span> *_stp_stack_sprint (<span class="keywordtype">int</span> verbose, <span class="keywordtype">int</span> levels)
00158 {
00159 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> stack;
00160 <span class="keywordtype">char</span> *ptr = _stp_scbuf_cur();
00161 __stp_stack_sprint (&stack, verbose, levels);
00162 <span class="keywordflow">return</span> ptr;
00163 }
00164 <span class="comment"></span>
00165 <span class="comment">/** @} */</span>
00166 <span class="preprocessor">#endif </span><span class="comment">/* _STACK_C_ */</span>
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