mirror of
https://gitlab.freedesktop.org/libinput/libinput.git
synced 2026-06-24 03:18:37 +02:00
9d8a8b4530
Use snprintf to make analyziers happier and bump the buffer size to 16. That's way larger than we'll need given the kernel's PID_MAX_LIMIT (4194304) but it doesn't cost us anything. Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1465>
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/*
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* Copyright © 2024 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "util-macros.h"
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#include "util-strings.h"
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/**
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* Print a backtrace for this process using gstack.
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*
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* If use_colors is true, highlight_after may specify
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* a substring for a line after which the remaining backtrace is
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* colored.
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*
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* If use_colors is true, highlight_before may specify
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* a substring for a line before which the backtrace is
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* colored.
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*
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* If use_colors is true, highlight_extra may specify
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* a substring for a line that has extra highlighting.
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*/
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static inline void
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backtrace_print(FILE *fp,
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bool use_colors,
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const char *highlight_after,
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const char *highlight_before,
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const char *highlight_extra)
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{
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#ifdef HAVE_GSTACK
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pid_t parent, child;
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int pipefd[2];
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if (pipe(pipefd) == -1)
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return;
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parent = getpid();
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child = fork();
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if (child == 0) {
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char pid[16];
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close(pipefd[0]);
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dup2(pipefd[1], STDOUT_FILENO);
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snprintf(pid, sizeof(pid), "%d", parent);
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execlp("gstack", "gstack", pid, NULL);
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exit(errno);
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}
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/* parent */
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int status;
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close(pipefd[1]);
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waitpid(child, &status, 0);
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status = WEXITSTATUS(status);
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if (status != 0) {
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fprintf(fp,
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"ERROR: gstack failed, no backtrace available: %s\n",
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strerror(status));
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goto out;
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}
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char buf[2048] = { 0 };
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fprintf(fp, "\nBacktrace:\n");
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read(pipefd[0], buf, sizeof(buf) - 1);
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if (!use_colors || (!highlight_after && !highlight_before)) {
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fprintf(fp, "%s\n", buf);
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} else {
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size_t nlines;
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char **lines = strv_from_string(buf, "\n", &nlines);
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char **line = lines;
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bool highlight = highlight_after == NULL;
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while (line && *line) {
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if (highlight && highlight_before &&
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strstr(*line, highlight_before))
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highlight = false;
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const char *hlcolor = highlight ? ANSI_BRIGHT_CYAN : "";
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if (highlight && highlight_extra &&
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strstr(*line, highlight_extra))
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hlcolor = ANSI_BRIGHT_MAGENTA;
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fprintf(fp,
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"%s%s%s\n",
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hlcolor,
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*line,
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highlight ? ANSI_NORMAL : "");
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if (!highlight && highlight_after &&
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strstr(*line, highlight_after))
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highlight = true;
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line++;
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}
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strv_free(lines);
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}
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out:
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close(pipefd[0]);
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#endif
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}
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