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
|
diff -ur node-v12.3.1/src/node_main.cc node-v12.3.1+JIT/src/node_main.cc
--- node-v12.3.1/src/node_main.cc 2019-05-22 02:21:54.000000000 -1000
+++ node-v12.3.1+JIT/src/node_main.cc 2019-06-18 11:15:25.000000000 -1000
@@ -21,6 +21,12 @@
#include "node.h"
#include <cstdio>
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
#ifdef _WIN32
#include <windows.h>
@@ -93,6 +99,50 @@
} // namespace per_process
} // namespace node
+#define CS_OPS_STATUS 0
+#define CS_DEBUGGED 0x10000000
+extern "C" int csops(pid_t pid, unsigned int ops, void * useraddr, size_t usersize);
+bool get_debugged() {
+ int flags;
+ int rv = csops(getpid(), CS_OPS_STATUS, &flags, sizeof(flags));
+ if (rv==0 && flags&CS_DEBUGGED) return true;
+
+ pid_t pid = fork();
+ if (pid) {
+ int st,rv,i=0;
+ do {
+ usleep(500);
+ rv = waitpid(pid, &st, 0);
+ } while (rv<0 && i++<10);
+ if (rv<0) fprintf(stderr, "Unable to wait for child?\n");
+ } else if (pid == 0) {
+ pid_t ppid = getppid();
+ int rv = ptrace(PT_ATTACHEXC, ppid, 0, 0);
+ if (rv) {
+ perror("Unable to attach to process");
+ exit(1);
+ }
+ for (int i=0; i<100; i++) {
+ usleep(1000);
+ errno = 0;
+ rv = ptrace(PT_DETACH, ppid, 0, 0);
+ if (rv==0) break;
+ }
+ if (rv) {
+ perror("Unable to detach from process");
+ exit(1);
+ }
+ exit(0);
+ } else {
+ perror("Unable to fork");
+ }
+
+ rv = csops(getpid(), CS_OPS_STATUS, &flags, sizeof(flags));
+ if (rv==0 && flags&CS_DEBUGGED) return true;
+
+ return false;
+}
+
int main(int argc, char* argv[]) {
#if defined(__POSIX__) && defined(NODE_SHARED_MODE)
// In node::PlatformInit(), we squash all signal handlers for non-shared lib
@@ -119,6 +168,9 @@
}
}
#endif
+ if (!get_debugged()) {
+ fprintf(stderr, "Unable to obtain CS_DEBUGGED - I will probably die now.\n");
+ }
// Disable stdio buffering, it interacts poorly with printf()
// calls elsewhere in the program (e.g., any logging from V8.)
setvbuf(stdout, nullptr, _IONBF, 0);
|
