mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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3d6ff0e5f4
Current implementation save trace data files on tmpfs by default, acrntrace would use up all the physical mem, which can affect system functioning. This commit changes default location for trace data file to current dir, and removes the codes for space reservation, which is not necessary. Signed-off-by: Yan, Like <like.yan@intel.com> Reviewed-by: Eddie Dong <eddie.dong@intel.com> Reviewed-by: Li, Fei1 <fei1.li@intel.com>
83 lines
1.5 KiB
C
83 lines
1.5 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <asm/errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include "sbuf.h"
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#include <errno.h>
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static inline bool sbuf_is_empty(shared_buf_t *sbuf)
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{
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return (sbuf->head == sbuf->tail);
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}
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static inline uint32_t sbuf_next_ptr(uint32_t pos,
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uint32_t span, uint32_t scope)
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{
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pos += span;
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pos = (pos >= scope) ? (pos - scope) : pos;
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return pos;
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}
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int sbuf_get(shared_buf_t *sbuf, uint8_t *data)
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{
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const void *from;
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if ((sbuf == NULL) || (data == NULL))
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return -EINVAL;
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if (sbuf_is_empty(sbuf)) {
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/* no data available */
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return 0;
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}
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from = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
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memcpy(data, from, sbuf->ele_size);
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sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
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return sbuf->ele_size;
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}
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int sbuf_write(int fd, shared_buf_t *sbuf)
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{
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const void *start;
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int written;
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if (sbuf == NULL)
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return -EINVAL;
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if (sbuf_is_empty(sbuf)) {
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return 0;
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}
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start = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
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written = write(fd, start, sbuf->ele_size);
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if (written != sbuf->ele_size) {
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printf("Failed to write: ret %d (ele_size %d), errno %d\n",
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written, sbuf->ele_size, (written == -1) ? errno : 0);
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return -1;
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}
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sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
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return sbuf->ele_size;
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}
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int sbuf_clear_buffered(shared_buf_t *sbuf)
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{
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if (sbuf == NULL)
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return -EINVAL;
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sbuf->head = sbuf->tail;
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return 0;
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}
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