1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef __TEST_UTILS_H
18#define __TEST_UTILS_H
19
20#include <inttypes.h>
21#include <sys/mman.h>
22#include <sys/types.h>
23#include <sys/wait.h>
24#include <unistd.h>
25
26#include <atomic>
27#include <string>
28#include <regex>
29
30#include <android-base/file.h>
31#include <android-base/stringprintf.h>
32
33#include "private/ScopeGuard.h"
34
35struct map_record {
36  uintptr_t addr_start;
37  uintptr_t addr_end;
38
39  int perms;
40
41  size_t offset;
42
43  dev_t device;
44  ino_t inode;
45
46  std::string pathname;
47};
48
49class Maps {
50 public:
51  static bool parse_maps(std::vector<map_record>* maps) {
52    FILE* fp = fopen("/proc/self/maps", "re");
53    if (fp == nullptr) {
54      return false;
55    }
56
57    auto fp_guard = make_scope_guard([&]() {
58      fclose(fp);
59    });
60
61    char line[BUFSIZ];
62    while (fgets(line, sizeof(line), fp) != nullptr) {
63      map_record record;
64      uint32_t dev_major, dev_minor;
65      int path_offset;
66      char prot[5]; // sizeof("rwxp")
67      if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %4s %" SCNxPTR " %x:%x %lu %n",
68            &record.addr_start, &record.addr_end, prot, &record.offset,
69            &dev_major, &dev_minor, &record.inode, &path_offset) == 7) {
70        record.perms = 0;
71        if (prot[0] == 'r') {
72          record.perms |= PROT_READ;
73        }
74        if (prot[1] == 'w') {
75          record.perms |= PROT_WRITE;
76        }
77        if (prot[2] == 'x') {
78          record.perms |= PROT_EXEC;
79        }
80
81        // TODO: parse shared/private?
82
83        record.device = makedev(dev_major, dev_minor);
84        record.pathname = line + path_offset;
85        if (!record.pathname.empty() && record.pathname.back() == '\n') {
86          record.pathname.pop_back();
87        }
88        maps->push_back(record);
89      }
90    }
91
92    return true;
93  }
94};
95
96extern "C" pid_t gettid();
97
98static inline void WaitUntilThreadSleep(std::atomic<pid_t>& tid) {
99  while (tid == 0) {
100    usleep(1000);
101  }
102  std::string filename = android::base::StringPrintf("/proc/%d/stat", tid.load());
103  std::regex regex {R"(\s+S\s+)"};
104
105  while (true) {
106    std::string content;
107    ASSERT_TRUE(android::base::ReadFileToString(filename, &content));
108    if (std::regex_search(content, regex)) {
109      break;
110    }
111    usleep(1000);
112  }
113}
114
115static inline void AssertChildExited(int pid, int expected_exit_status) {
116  int status;
117  ASSERT_EQ(pid, waitpid(pid, &status, 0));
118  ASSERT_TRUE(WIFEXITED(status));
119  ASSERT_EQ(expected_exit_status, WEXITSTATUS(status));
120}
121
122// The absolute path to the executable
123const std::string& get_executable_path();
124
125#endif
126