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https://github.com/JakeHillion/drgn.git
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f1eaf5b14c
Really it's more of a test program than an example program. It's useful for benchmarking, testing with valgrind, etc. It's not built by default, but it can be built manually with: $ make -C build/temp.* examples/load_debug_info And run with: $ ./build/temp.*/examples/load_debug_info Signed-off-by: Omar Sandoval <osandov@osandov.com>
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "drgn.h"
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static void usage(bool error)
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{
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fprintf(error ? stderr : stdout,
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"usage: load_debug_info [-k|-c CORE|-p PID]\n"
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"\n"
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"Example libdrgn program that loads default debug information\n"
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"\n"
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"Options:\n"
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" -k, --kernel debug the running kernel (default)\n"
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" -c PATH, --core PATH debug the given core dump\n"
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" -p PID, --pid PID debug the running process with the given PID\n"
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" -h, --help display this help message and exit\n");
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exit(error ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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int main(int argc, char **argv)
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{
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struct option long_options[] = {
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{"kernel", no_argument, NULL, 'k'},
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{"core", required_argument, NULL, 'c'},
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{"pid", required_argument, NULL, 'p'},
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{"help", no_argument, NULL, 'h'},
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{},
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};
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bool kernel = false;
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const char *core = NULL;
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const char *pid = NULL;
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for (;;) {
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int c = getopt_long(argc, argv, "kc:p:h", long_options, NULL);
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if (c == -1)
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break;
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switch (c) {
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case 'k':
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kernel = true;
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break;
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case 'c':
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core = optarg;
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break;
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case 'p':
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pid = optarg;
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break;
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case 'h':
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usage(false);
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default:
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usage(true);
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}
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}
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if (optind != argc || kernel + !!core + !!pid > 1)
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usage(true);
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struct drgn_program *prog;
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struct drgn_error *err = drgn_program_create(NULL, &prog);
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if (err) {
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prog = NULL;
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goto out;
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}
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if (core)
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err = drgn_program_set_core_dump(prog, core);
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else if (pid)
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err = drgn_program_set_pid(prog, atoi(pid) ?: getpid());
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else
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err = drgn_program_set_kernel(prog);
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if (err)
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goto out;
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err = drgn_program_load_debug_info(prog, NULL, 0, true, true);
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out:;
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int status;
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if (err) {
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if (err->code == DRGN_ERROR_MISSING_DEBUG_INFO)
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status = EXIT_SUCCESS;
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else
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status = EXIT_FAILURE;
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drgn_error_fwrite(stderr, err);
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drgn_error_destroy(err);
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} else {
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status = EXIT_SUCCESS;
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}
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drgn_program_destroy(prog);
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return status;
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}
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