mirror of https://github.com/F-Stack/f-stack.git
128 lines
2.8 KiB
C
128 lines
2.8 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#include <rte_debug.h>
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#ifdef RTE_BACKTRACE
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#include <dlfcn.h>
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#include <execinfo.h>
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#include <string.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#define BACKTRACE_SIZE 256
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/*
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* Convert number to string and return start of string.
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* Note: string does not start at beginning of buffer.
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*/
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static char *safe_itoa(long val, char *buf, size_t len, unsigned int radix)
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{
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char *bp = buf + len;
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static const char hexdigit[] = "0123456789abcdef";
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*--bp = '\0'; /* Null terminate the string */
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do {
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/* if buffer is not big enough, then truncate */
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if (bp == buf)
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return bp;
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*--bp = hexdigit[val % radix];
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val /= radix;
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} while (val != 0);
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return bp;
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}
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/*
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* Dump the stack of the calling core
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*
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* To be safe in signal handler requires limiting what functions are
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* used in this code since may be called from inside libc or
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* when malloc poll is corrupt.
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*
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* Most of libc is therefore not safe, include RTE_LOG (calls syslog);
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* backtrace_symbols (calls malloc), etc.
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*/
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void rte_dump_stack(void)
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{
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void *func[BACKTRACE_SIZE];
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Dl_info info;
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char buf1[8], buf2[32], buf3[32], buf4[32];
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struct iovec iov[10];
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int i, size;
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size = backtrace(func, BACKTRACE_SIZE);
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for (i = 0; i < size; i++) {
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struct iovec *io = iov;
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char *str;
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uintptr_t base;
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long offset;
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void *pc = func[i];
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/*
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* Macro to put string onto set of iovecs.
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* cast is to suppress warnings about lose of const qualifier.
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*/
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#define PUSH_IOV(io, str) { \
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(io)->iov_base = (char *)(uintptr_t)str; \
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(io)->iov_len = strlen(str); \
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++io; }
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/* output stack frame number */
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str = safe_itoa(i, buf1, sizeof(buf1), 10);
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PUSH_IOV(io, str); /* iov[0] */
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PUSH_IOV(io, ": "); /* iov[1] */
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/* Lookup the symbol information */
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if (dladdr(pc, &info) == 0) {
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PUSH_IOV(io, "?? [");
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} else {
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const char *fname;
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if (info.dli_fname && *info.dli_fname)
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fname = info.dli_fname;
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else
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fname = "(vdso)";
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PUSH_IOV(io, fname); /* iov[2] */
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PUSH_IOV(io, " ("); /* iov[3] */
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if (info.dli_saddr != NULL) {
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PUSH_IOV(io, info.dli_sname); /* iov[4] */
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base = (uintptr_t)info.dli_saddr;
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} else {
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str = safe_itoa((unsigned long)info.dli_fbase,
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buf3, sizeof(buf3), 16);
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PUSH_IOV(io, str);
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base = (uintptr_t)info.dli_fbase;
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}
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PUSH_IOV(io, "+0x"); /* iov[5] */
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offset = (uintptr_t)pc - base;
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str = safe_itoa(offset, buf4, sizeof(buf4), 16);
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PUSH_IOV(io, str); /* iov[6] */
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PUSH_IOV(io, ") ["); /* iov[7] */
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}
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str = safe_itoa((unsigned long)pc, buf2, sizeof(buf2), 16);
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PUSH_IOV(io, str); /* iov[8] */
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PUSH_IOV(io, "]\n"); /* iov[9] */
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if (writev(STDERR_FILENO, iov, io - iov) < 0)
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break;
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#undef PUSH_IOV
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}
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}
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#else /* !RTE_BACKTRACE */
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/* stub if not enabled */
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void rte_dump_stack(void) { }
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#endif /* RTE_BACKTRACE */
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