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[PATCH] uml: remove syscall debugging

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Eliminate an unused debug option.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2006-07-10 04:45:13 -07:00 committed by Linus Torvalds
parent 29ac1c2142
commit 469226a431
7 changed files with 2 additions and 86 deletions
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9
arch/um/Kconfig.debug
View file

@ -47,13 +47,4 @@ config GCOV
If you're involved in UML kernel development and want to use gcov,
say Y. If you're unsure, say N.
config SYSCALL_DEBUG
bool "Enable system call debugging"
depends on DEBUG_INFO
help
This adds some system debugging to UML, including keeping a ring buffer
with recent system calls and some global and per-task statistics.
If unsure, say N
endmenu

1
arch/um/defconfig
View file

@ -526,4 +526,3 @@ CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_GPROF is not set
# CONFIG_GCOV is not set
# CONFIG_SYSCALL_DEBUG is not set

1
arch/um/kernel/Makefile
View file

@ -15,7 +15,6 @@ obj-y = config.o exec_kern.o exitcode.o \
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
obj-$(CONFIG_SYSCALL_DEBUG) += syscall.o
obj-$(CONFIG_MODE_TT) += tt/
obj-$(CONFIG_MODE_SKAS) += skas/

7
arch/um/kernel/skas/syscall.c
View file

@ -18,11 +18,7 @@ void handle_syscall(union uml_pt_regs *r)
struct pt_regs *regs = container_of(r, struct pt_regs, regs);
long result;
int syscall;
#ifdef UML_CONFIG_SYSCALL_DEBUG
int index;
index = record_syscall_start(UPT_SYSCALL_NR(r));
#endif
syscall_trace(r, 0);
current->thread.nsyscalls++;
@ -44,7 +40,4 @@ void handle_syscall(union uml_pt_regs *r)
REGS_SET_SYSCALL_RETURN(r->skas.regs, result);
syscall_trace(r, 1);
#ifdef UML_CONFIG_SYSCALL_DEBUG
record_syscall_end(index, result);
#endif
}

36
arch/um/kernel/syscall.c
View file

@ -1,36 +0,0 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "kern_util.h"
#include "syscall.h"
#include "os.h"
struct {
int syscall;
int pid;
long result;
unsigned long long start;
unsigned long long end;
} syscall_record[1024];
int record_syscall_start(int syscall)
{
int max, index;
max = sizeof(syscall_record)/sizeof(syscall_record[0]);
index = next_syscall_index(max);
syscall_record[index].syscall = syscall;
syscall_record[index].pid = current_pid();
syscall_record[index].result = 0xdeadbeef;
syscall_record[index].start = os_nsecs();
return(index);
}
void record_syscall_end(int index, long result)
{
syscall_record[index].result = result;
syscall_record[index].end = os_nsecs();
}

12
arch/um/kernel/tt/syscall_kern.c
View file

@ -21,18 +21,11 @@ void syscall_handler_tt(int sig, struct pt_regs *regs)
void *sc;
long result;
int syscall;
#ifdef CONFIG_SYSCALL_DEBUG
int index;
#endif
sc = UPT_SC(&regs->regs);
SC_START_SYSCALL(sc);
syscall = UPT_SYSCALL_NR(&regs->regs);
#ifdef CONFIG_SYSCALL_DEBUG
index = record_syscall_start(syscall);
#endif
syscall_trace(&regs->regs, 0);
current->thread.nsyscalls++;
@ -50,7 +43,4 @@ void syscall_handler_tt(int sig, struct pt_regs *regs)
SC_SET_SYSCALL_RETURN(sc, result);
syscall_trace(&regs->regs, 1);
#ifdef CONFIG_SYSCALL_DEBUG
record_syscall_end(index, result);
#endif
}

22
arch/um/kernel/tt/tracer.c
View file

@ -188,10 +188,7 @@ int tracer(int (*init_proc)(void *), void *sp)
int status, pid = 0, sig = 0, cont_type, tracing = 0, op = 0;
int proc_id = 0, n, err, old_tracing = 0, strace = 0;
int local_using_sysemu = 0;
#ifdef UML_CONFIG_SYSCALL_DEBUG
unsigned long eip = 0;
int last_index;
#endif
signal(SIGPIPE, SIG_IGN);
setup_tracer_winch();
tracing_pid = os_getpid();
@ -282,23 +279,6 @@ int tracer(int (*init_proc)(void *), void *sp)
else if(WIFSTOPPED(status)){
proc_id = pid_to_processor_id(pid);
sig = WSTOPSIG(status);
#ifdef UML_CONFIG_SYSCALL_DEBUG
if(signal_index[proc_id] == 1024){
signal_index[proc_id] = 0;
last_index = 1023;
}
else last_index = signal_index[proc_id] - 1;
if(((sig == SIGPROF) || (sig == SIGVTALRM) ||
(sig == SIGALRM)) &&
(signal_record[proc_id][last_index].signal == sig)&&
(signal_record[proc_id][last_index].pid == pid))
signal_index[proc_id] = last_index;
signal_record[proc_id][signal_index[proc_id]].pid = pid;
gettimeofday(&signal_record[proc_id][signal_index[proc_id]].time, NULL);
eip = ptrace(PTRACE_PEEKUSR, pid, PT_IP_OFFSET, 0);
signal_record[proc_id][signal_index[proc_id]].addr = eip;
signal_record[proc_id][signal_index[proc_id]++].signal = sig;
#endif
if(proc_id == -1){
sleeping_process_signal(pid, sig);
continue;