1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <unistd.h>
#include <private/android_filesystem_config.h>
#define DUMP_PATH "/sys/class/kgsl/kgsl-3d0/snapshot"
#define POLL_FILE DUMP_PATH"/timestamp"
#define DUMP_FILE DUMP_PATH"/dump"
#define COPYSIZE 256
#define MAX_DUMPFILES 10
#define typecheck(x,y) { \
typeof(x) __dummy1; \
typeof(y) __dummy2; \
(void)(&__dummy1 == &__dummy2); }
#define DUMPFILE_DIR "/data/graphicsdumps"
static int find_and_open_dumpfile()
{
unsigned long mtime = ULONG_MAX;
struct stat sb;
char path[128];
int fd, i, oldest = 0;
/*
* XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought
* to, our logic breaks. This check will generate a warning if that happens.
*/
typecheck(mtime, sb.st_mtime);
/*
* In a single wolf-like pass, find an available slot and, in case none
* exist, find and record the least-recently-modified file.
*/
for (i = 0; i < MAX_DUMPFILES; i++) {
snprintf(path, sizeof(path), DUMPFILE_DIR"/snapshot%02d", i);
if (!stat(path, &sb)) {
if (sb.st_mtime < mtime) {
oldest = i;
mtime = sb.st_mtime;
}
continue;
}
if (errno != ENOENT)
continue;
fd = open(path, O_CREAT | O_EXCL | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0)
continue; /* raced ? */
printf("graphicsd - dumping to file[%s]...", path);
return fd;
}
/* we didn't find an available file, so we clobber the oldest one */
snprintf(path, sizeof(path), DUMPFILE_DIR"/snapshot%02d", oldest);
fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
printf("graphicsd - dumping to file[%s]...", path);
return fd;
}
short capture_dump() {
char buffer[COPYSIZE] = {0};
int rc = 0;
int dumpfd, ifd = -1;
short ret = -1;
int totalc = 0;
mkdir(DUMPFILE_DIR, 02755);
chmod(DUMPFILE_DIR, 02775);
chown(DUMPFILE_DIR, AID_SYSTEM, AID_SYSTEM);
dumpfd = find_and_open_dumpfile();
if(dumpfd >= 0) {
ifd = open(DUMP_FILE, O_RDONLY);
if(ifd >= 0) {
// copy from dump file to destination file
while((rc = read(ifd, buffer, COPYSIZE)) != 0) {
totalc += rc;
write(dumpfd, buffer, rc);
}
printf("Success [size: %d]!\n", totalc);
ret = 0;
close(ifd);
} else {
printf("ERROR! unable to open source file[%s][errno:%d(%s)]\n", DUMP_FILE, errno, strerror(errno));
}
close(dumpfd);
// to commit buffer cache to disk
sync();
} else {
printf("ERROR! unable to open destination file[errno:%d(%s)]\n", errno, strerror(errno));
}
return ret;
}
int main(int argc, char* argv[])
{
int fd = -1;
struct pollfd fds;
char buffer[16] = {0};
int rc;
short run = 1;
printf("graphicsd - version: 1.0\n");
fd = open(POLL_FILE, O_RDONLY);
if(fd >= 0) {
// perform initial read to clear poll flag
rc = read(fd, buffer, sizeof(buffer));
lseek(fd, 0, SEEK_SET);
if(rc < 0) {
printf("graphicsd - ERROR! unable to read[%s][errno: %d(%s)]\n", POLL_FILE, errno, strerror(errno));
run = 0;
}
} else {
printf("graphicsd - ERROR! unable to open[%s][errno: %d(%s)]\n", POLL_FILE, errno, strerror(errno));
run = 0;
}
while(run) {
fds.fd = fd;
fds.events = POLLERR|POLLPRI;
fds.revents = 0;
printf("graphicsd - watching [%s][fd: %d]\n", POLL_FILE, fd);
int poll_val = poll(&fds, 1, -1);
printf("graphicsd - timestamp file triggered [poll code: %d]\n", poll_val);
if (poll_val == -1) {
printf("graphicsd - poll failure, errno = %d (%s)\n", errno, strerror(errno));
} else if (poll_val > 0) {
rc = read(fd, buffer, sizeof(buffer));
buffer[rc-1] = 0; // clear the carriage return
printf("graphicsd - graphics hw lockup @ timestamp [%s]\n", buffer);
lseek(fd, 0, SEEK_SET);
memset(buffer, 0, sizeof(buffer));
capture_dump();
}
}
close(fd);
return 0;
}
|
