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eaea1dfb AZ |
1 | /* Basic tests for pldd program. |
2 | Copyright (C) 2019 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <string.h> | |
21 | #include <unistd.h> | |
22 | #include <stdint.h> | |
eaea1dfb AZ |
23 | #include <stdbool.h> |
24 | ||
25 | #include <array_length.h> | |
26 | #include <gnu/lib-names.h> | |
27 | ||
28 | #include <support/subprocess.h> | |
29 | #include <support/capture_subprocess.h> | |
30 | #include <support/check.h> | |
31 | ||
32 | static void | |
33 | target_process (void *arg) | |
34 | { | |
35 | pause (); | |
36 | } | |
37 | ||
38 | /* The test runs in a container because pldd does not support tracing | |
39 | a binary started by the loader iself (as with testrun.sh). */ | |
40 | ||
3c15600e AZ |
41 | static bool |
42 | in_str_list (const char *libname, const char *const strlist[]) | |
43 | { | |
44 | for (const char *const *str = strlist; *str != NULL; str++) | |
45 | if (strcmp (libname, *str) == 0) | |
46 | return true; | |
47 | return false; | |
48 | } | |
49 | ||
eaea1dfb AZ |
50 | static int |
51 | do_test (void) | |
52 | { | |
53 | /* Create a copy of current test to check with pldd. */ | |
54 | struct support_subprocess target = support_subprocess (target_process, NULL); | |
55 | ||
56 | /* Run 'pldd' on test subprocess. */ | |
57 | struct support_capture_subprocess pldd; | |
58 | { | |
59 | /* Three digits per byte plus null terminator. */ | |
60 | char pid[3 * sizeof (uint32_t) + 1]; | |
61 | snprintf (pid, array_length (pid), "%d", target.pid); | |
62 | ||
63 | const char prog[] = "/usr/bin/pldd"; | |
64 | ||
65 | pldd = support_capture_subprogram (prog, | |
66 | (char *const []) { (char *) prog, pid, NULL }); | |
67 | ||
68 | support_capture_subprocess_check (&pldd, "pldd", 0, sc_allow_stdout); | |
69 | } | |
70 | ||
71 | /* Check 'pldd' output. The test is expected to be linked against only | |
72 | loader and libc. */ | |
73 | { | |
74 | pid_t pid; | |
75 | char buffer[512]; | |
76 | #define STRINPUT(size) "%" # size "s" | |
77 | ||
78 | FILE *out = fmemopen (pldd.out.buffer, pldd.out.length, "r"); | |
79 | TEST_VERIFY (out != NULL); | |
80 | ||
81 | /* First line is in the form of <pid>: <full path of executable> */ | |
82 | TEST_COMPARE (fscanf (out, "%u: " STRINPUT (512), &pid, buffer), 2); | |
83 | ||
84 | TEST_COMPARE (pid, target.pid); | |
85 | TEST_COMPARE (strcmp (basename (buffer), "tst-pldd"), 0); | |
86 | ||
87 | /* It expects only one loader and libc loaded by the program. */ | |
88 | bool interpreter_found = false, libc_found = false; | |
89 | while (fgets (buffer, array_length (buffer), out) != NULL) | |
90 | { | |
91 | /* Ignore vDSO. */ | |
92 | if (buffer[0] != '/') | |
93 | continue; | |
94 | ||
95 | /* Remove newline so baseline (buffer) can compare against the | |
96 | LD_SO and LIBC_SO macros unmodified. */ | |
97 | if (buffer[strlen(buffer)-1] == '\n') | |
98 | buffer[strlen(buffer)-1] = '\0'; | |
99 | ||
3c15600e AZ |
100 | const char *libname = basename (buffer); |
101 | ||
102 | /* It checks for default names in case of build configure with | |
103 | --enable-hardcoded-path-in-tests (BZ #24506). */ | |
104 | if (in_str_list (libname, | |
105 | (const char *const []) { "ld.so", LD_SO, NULL })) | |
eaea1dfb AZ |
106 | { |
107 | TEST_COMPARE (interpreter_found, false); | |
108 | interpreter_found = true; | |
109 | continue; | |
110 | } | |
111 | ||
3c15600e AZ |
112 | if (in_str_list (libname, |
113 | (const char *const []) { "libc.so", LIBC_SO, NULL })) | |
eaea1dfb AZ |
114 | { |
115 | TEST_COMPARE (libc_found, false); | |
116 | libc_found = true; | |
117 | continue; | |
118 | } | |
119 | } | |
120 | TEST_COMPARE (interpreter_found, true); | |
121 | TEST_COMPARE (libc_found, true); | |
122 | ||
123 | fclose (out); | |
124 | } | |
125 | ||
126 | support_capture_subprocess_free (&pldd); | |
127 | support_process_terminate (&target); | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | #include <support/test-driver.c> |