239e7a0756
Include the leaky executable's name in the log output. Fix the "sh" test. Use uintptr_t instead of intptr_t. Also fix debug formatting of NULL with %s. Bug: 7291287 Change-Id: I015bf341cd48d43a247173612e6ccb1bf1243d53
113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "debug_stacktrace.h"
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#include <dlfcn.h>
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#include <unistd.h>
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#include <unwind.h>
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#include <sys/types.h>
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#include "debug_format.h"
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#include "debug_mapinfo.h"
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#include "logd.h"
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/* depends how the system includes define this */
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#ifdef HAVE_UNWIND_CONTEXT_STRUCT
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typedef struct _Unwind_Context __unwind_context;
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#else
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typedef _Unwind_Context __unwind_context;
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#endif
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static _Unwind_Reason_Code trace_function(__unwind_context* context, void* arg) {
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stack_crawl_state_t* state = static_cast<stack_crawl_state_t*>(arg);
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if (state->count) {
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uintptr_t ip = _Unwind_GetIP(context);
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if (ip) {
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state->addrs[0] = ip;
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state->addrs++;
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state->count--;
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return _URC_NO_REASON;
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}
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}
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// If we run out of space to record the address or 0 has been seen, stop
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// unwinding the stack.
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return _URC_END_OF_STACK;
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}
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__LIBC_HIDDEN__ int get_backtrace(uintptr_t* addrs, size_t max_entries) {
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stack_crawl_state_t state;
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state.count = max_entries;
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state.addrs = addrs;
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_Unwind_Backtrace(trace_function, &state);
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return max_entries - state.count;
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}
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__LIBC_HIDDEN__ void log_backtrace(mapinfo_t* map_info, uintptr_t* addrs, size_t c) {
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uintptr_t self_bt[16];
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if (addrs == NULL) {
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c = get_backtrace(self_bt, 16);
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addrs = self_bt;
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}
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__libc_format_log(ANDROID_LOG_ERROR, "libc",
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"*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n");
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int index = 0;
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for (size_t i = 0 ; i < c; ++i) {
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void* offset = 0;
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const char* symbol = NULL;
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Dl_info info;
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if (dladdr((void*) addrs[i], &info) != 0) {
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offset = info.dli_saddr;
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symbol = info.dli_sname;
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}
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// This test is a bit sketchy, but it allows us to skip the
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// stack trace entries due to this debugging code. it works
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// because those don't have a symbol (they're not exported).
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if (symbol != NULL || index > 0) {
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unsigned int rel_pc;
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const mapinfo_t* mi = mapinfo_find(map_info, addrs[i], &rel_pc);
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const char* soname = mi ? mi->name : info.dli_fname;
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if (soname == NULL) {
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soname = "unknown";
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}
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if (symbol) {
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__libc_format_log(ANDROID_LOG_ERROR, "libc", " #%02d pc %08x %s (%s+0x%x)",
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index, rel_pc, soname, symbol, addrs[i] - (uintptr_t) offset);
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} else {
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__libc_format_log(ANDROID_LOG_ERROR, "libc", " #%02d pc %08x %s",
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index, rel_pc, soname);
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}
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++index;
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}
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}
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}
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