129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
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/**
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* WinPR: Windows Portable Runtime
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* WinPR Debugging helpers
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*
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* Copyright 2022 Armin Novak <armin.novak@thincast.com>
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* Copyright 2022 Thincast Technologies GmbH
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <assert.h>
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#include <stdlib.h>
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#include <unwind.h>
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#include <winpr/string.h>
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#include "debug.h"
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#include <dlfcn.h>
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typedef struct
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{
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uintptr_t pc;
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void* langSpecificData;
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} unwind_info_t;
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typedef struct
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{
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size_t pos;
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size_t size;
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unwind_info_t* info;
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} unwind_context_t;
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static _Unwind_Reason_Code unwind_backtrace_callback(struct _Unwind_Context* context, void* arg)
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{
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unwind_context_t* ctx = arg;
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assert(ctx);
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if (ctx->pos < ctx->size)
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{
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unwind_info_t* info = &ctx->info[ctx->pos++];
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info->pc = _Unwind_GetIP(context);
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info->langSpecificData = _Unwind_GetLanguageSpecificData(context);
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}
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return _URC_NO_REASON;
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}
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void* winpr_unwind_backtrace(DWORD size)
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{
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_Unwind_Reason_Code rc;
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unwind_context_t* ctx = calloc(1, sizeof(unwind_context_t));
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if (!ctx)
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goto fail;
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ctx->size = size;
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ctx->info = calloc(size, sizeof(unwind_info_t));
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if (!ctx->info)
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goto fail;
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rc = _Unwind_Backtrace(unwind_backtrace_callback, ctx);
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if (rc != _URC_END_OF_STACK)
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goto fail;
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return ctx;
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fail:
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winpr_unwind_backtrace_free(ctx);
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return NULL;
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}
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void winpr_unwind_backtrace_free(void* buffer)
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{
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unwind_context_t* ctx = buffer;
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if (!ctx)
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return;
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free(ctx->info);
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free(ctx);
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}
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#define UNWIND_MAX_LINE_SIZE 1024
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char** winpr_unwind_backtrace_symbols(void* buffer, size_t* used)
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{
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size_t x;
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char** str = NULL;
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unwind_context_t* ctx = buffer;
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if (!ctx)
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return NULL;
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str = calloc(ctx->pos * (sizeof(char*) + UNWIND_MAX_LINE_SIZE), sizeof(char*));
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if (!str)
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return NULL;
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if (used)
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*used = ctx->pos;
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for (x = 0; x < ctx->pos; x++)
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{
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char* msg = str + ctx->pos * sizeof(char*) + x * UNWIND_MAX_LINE_SIZE;
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const unwind_info_t* info = &ctx->info[x];
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Dl_info dlinfo = { 0 };
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int rc = dladdr(info->pc, &dlinfo);
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str[x] = msg;
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if (rc == 0)
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_snprintf(msg, UNWIND_MAX_LINE_SIZE, "unresolvable, address=%p", info->pc);
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else
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_snprintf(msg, UNWIND_MAX_LINE_SIZE, "dli_fname=%s [%p], dli_sname=%s [%p]",
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dlinfo.dli_fname, dlinfo.dli_fbase, dlinfo.dli_sname, dlinfo.dli_saddr);
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}
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return str;
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}
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