diff options
| author | Markus Metzger <markus.t.metzger@intel.com> | 2008-01-30 13:32:04 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:04 +0100 |
| commit | c6334593c61c71ab2e666c015eef13995736f49a (patch) | |
| tree | 49ea09756335b1be671bb7fc4fee4ba0abb7c0ac | |
| parent | cba4b65d359268c40679ca75ac92c0b93cecf6de (diff) | |
x86, ptrace: overflow signal API
Establish the user API for sending a user-defined signal to the traced task on a BTS buffer overflow.
This should complete the user API for the BTS ptrace extension.
The patches so far implement wrap-around overflow handling as is needed for debugging.
The remaining open is another overflow handling mechanism that sends a signal to the traced task on a buffer overflow.
This will take some more time from my side.
Since, from a user perspective, this occurs behind the scenes, the patch set should already be useful. More features may/will be added on top of it (overflow signal, pageable back-up buffers, kernel tracing, core file support, profiling, ...).
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | include/asm-x86/ptrace-abi.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/asm-x86/ptrace-abi.h b/include/asm-x86/ptrace-abi.h index bcf67044754..b3b9e023afc 100644 --- a/include/asm-x86/ptrace-abi.h +++ b/include/asm-x86/ptrace-abi.h @@ -88,11 +88,13 @@ struct ptrace_bts_config { unsigned int size; /* bitmask of below flags */ unsigned int flags; + /* buffer overflow signal */ + unsigned int signal; }; #define PTRACE_BTS_O_TRACE 0x1 /* branch trace */ #define PTRACE_BTS_O_SCHED 0x2 /* scheduling events w/ jiffies */ -#define PTRACE_BTS_O_SIGNAL 0x4 /* send SIG? on buffer overflow +#define PTRACE_BTS_O_SIGNAL 0x4 /* send SIG<signal> on buffer overflow instead of wrapping around */ #define PTRACE_BTS_O_CUT_SIZE 0x8 /* cut requested size to max available instead of failing */ |