51 ::getpid() call in OSThread::_thread_id. This way uniqueness of OSThread::_thread_id
52 was lost under NPTL. Now, we store the result of ::gettid() call in
53 OSThread::_thread_id. Because gettid returns actual pid of thread (lwp id), this is
54 unique again. We therefore use OSThread::_thread_id as unique identifier.
55
56 3. There is a unique LWP id under both thread libraries. libthread_db maps pthread_id
57 to its underlying lwp_id under both the thread libraries. thread_info.lwp_id stores
58 lwp_id of the thread. The lwp id is nothing but the actual pid of clone'd processes. But
59 unfortunately libthread_db does not work very well for core dumps. So, we get pthread_id
60 only for processes. For core dumps, we don't use libthread_db at all (like gdb).
61
62 4. ptrace operates on this LWP id under both the thread libraries. When we say 'pid' for
63 ptrace call, we refer to lwp_id of the thread.
64
65 5. for core file, we parse ELF files and read data from them. For processes we use
66 combination of ptrace and /proc calls.
67
68 *************************************************************************************/
69
70
71 #if defined(sparc) || defined(sparcv9) || defined(ppc64)
72 #define user_regs_struct pt_regs
73 #endif
74 #if defined(aarch64)
75 #include <asm/ptrace.h>
76 #define user_regs_struct user_pt_regs
77 #endif
78
79 // This C bool type must be int for compatibility with Linux calls and
80 // it would be a mistake to equivalence it to C++ bool on many platforms
81
82 typedef int bool;
83 #define true 1
84 #define false 0
85
86 struct ps_prochandle;
87
88 // attach to a process
89 struct ps_prochandle* Pgrab(pid_t pid, char* err_buf, size_t err_buf_len);
90
91 // attach to a core dump
|
51 ::getpid() call in OSThread::_thread_id. This way uniqueness of OSThread::_thread_id
52 was lost under NPTL. Now, we store the result of ::gettid() call in
53 OSThread::_thread_id. Because gettid returns actual pid of thread (lwp id), this is
54 unique again. We therefore use OSThread::_thread_id as unique identifier.
55
56 3. There is a unique LWP id under both thread libraries. libthread_db maps pthread_id
57 to its underlying lwp_id under both the thread libraries. thread_info.lwp_id stores
58 lwp_id of the thread. The lwp id is nothing but the actual pid of clone'd processes. But
59 unfortunately libthread_db does not work very well for core dumps. So, we get pthread_id
60 only for processes. For core dumps, we don't use libthread_db at all (like gdb).
61
62 4. ptrace operates on this LWP id under both the thread libraries. When we say 'pid' for
63 ptrace call, we refer to lwp_id of the thread.
64
65 5. for core file, we parse ELF files and read data from them. For processes we use
66 combination of ptrace and /proc calls.
67
68 *************************************************************************************/
69
70
71 #if defined(sparc) || defined(sparcv9) || defined(ppc64) || defined(ppc64le)
72 #define user_regs_struct pt_regs
73 #endif
74 #if defined(aarch64)
75 #include <asm/ptrace.h>
76 #define user_regs_struct user_pt_regs
77 #endif
78
79 // This C bool type must be int for compatibility with Linux calls and
80 // it would be a mistake to equivalence it to C++ bool on many platforms
81
82 typedef int bool;
83 #define true 1
84 #define false 0
85
86 struct ps_prochandle;
87
88 // attach to a process
89 struct ps_prochandle* Pgrab(pid_t pid, char* err_buf, size_t err_buf_len);
90
91 // attach to a core dump
|