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| author | Vyacheslav Barinov <v.barinov@samsung.com> | 2018-07-04 16:13:29 +0100 |
|---|---|---|
| committer | Pedro Alves <palves@redhat.com> | 2018-07-04 16:13:29 +0100 |
| commit | 1b919490e8ba30bf1d6941df0ed112b0e557017e (patch) | |
| tree | 64d78f15a4de41831739f508ab170231b2c35ee4 /gdb/linux-nat.c | |
| parent | 94d401b8b88a76b1372ce44e805516756a4f737b (diff) | |
| download | gdb-1b919490e8ba30bf1d6941df0ed112b0e557017e.zip gdb-1b919490e8ba30bf1d6941df0ed112b0e557017e.tar.gz gdb-1b919490e8ba30bf1d6941df0ed112b0e557017e.tar.bz2 | |
Warn if /proc is not accessiblegdb-8.2-branchpoint
There's a buildroot where I want to debug a binary, and I tried to
connect to it from outside, but got very weird errors like
architecture mismatch or protocol errors. At last, after switching on
'--debug' for gdbserver I found a message 'Can't open /proc/pid/'
message and suddenly found that I forgot to mount procfs in my
buildroot.
Make discovering the problem easier by making GDB / GDBserver warn
(even without --debug) if /proc can not be accessed.
Native debugging:
(gdb) start
Temporary breakpoint 1 at 0x400835: file test.c, line 10.
Starting program: /tmp/test
warning: /proc is not accessible.
GDBserver/remote debugging:
$ ./gdbserver :9999 ./gdbserver
gdbserver: /proc is not accessible.
gdb/ChangeLog:
2018-07-04 Vyacheslav Barinov <v.barinov@samsung.com>
Pedro Alves <palves@redhat.com>
* linux-nat.c (linux_init_ptrace): Rename to ...
(linux_init_ptrace_procfs): ... this. Call
linux_proc_init_warnings.
(linux_nat_target::post_attach)
(linux_nat_target::post_startup_inferior): Adjust.
* nat/linux-procfs.c (linux_proc_init_warnings): Define function.
* nat/linux-procfs.h (linux_proc_init_warnings): Declare function.
gdb/gdbserver/ChangeLog:
2018-07-04 Vyacheslav Barinov <v.barinov@samsung.com>
Pedro Alves <palves@redhat.com>
* linux-low.c (initialize_low): Call linux_proc_init_warnings.
Diffstat (limited to 'gdb/linux-nat.c')
| -rw-r--r-- | gdb/linux-nat.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c index 567cb06..18d9a38 100644 --- a/gdb/linux-nat.c +++ b/gdb/linux-nat.c @@ -384,18 +384,19 @@ linux_nat_ptrace_options (int attached) return options; } -/* Initialize ptrace warnings and check for supported ptrace - features given PID. +/* Initialize ptrace and procfs warnings and check for supported + ptrace features given PID. ATTACHED should be nonzero iff we attached to the inferior. */ static void -linux_init_ptrace (pid_t pid, int attached) +linux_init_ptrace_procfs (pid_t pid, int attached) { int options = linux_nat_ptrace_options (attached); linux_enable_event_reporting (pid, options); linux_ptrace_init_warnings (); + linux_proc_init_warnings (); } linux_nat_target::~linux_nat_target () @@ -404,13 +405,13 @@ linux_nat_target::~linux_nat_target () void linux_nat_target::post_attach (int pid) { - linux_init_ptrace (pid, 1); + linux_init_ptrace_procfs (pid, 1); } void linux_nat_target::post_startup_inferior (ptid_t ptid) { - linux_init_ptrace (ptid.pid (), 0); + linux_init_ptrace_procfs (ptid.pid (), 0); } /* Return the number of known LWPs in the tgid given by PID. */ |