mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-18 10:35:55 +00:00
Code Issues Releases Activity

Add code to handle stack traces that go all the way back to userland.

Browse Source 
Use a better algorithm for finding out if an address is in the kernel.

Submitted by:	tmm
This commit is contained in:
Jake Burkholder 2001-08-10 04:23:41 +00:00
parent 8a7de3c054
commit 8dec6a681e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=81379
1 changed files with 26 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
sys/sparc64/sparc64/db_trace.c
View File

@ -46,9 +46,6 @@
#include <ddb/db_variables.h>
#include <ddb/db_watch.h>
#define INKERNEL(va) \
((va) >= VM_MIN_KERNEL_ADDRESS && (va) <= VM_MAX_KERNEL_ADDRESS)
static db_varfcn_t db_show_in0;
static db_varfcn_t db_show_in1;
static db_varfcn_t db_show_in2;
@ -66,9 +63,16 @@ static db_varfcn_t db_show_local5;
static db_varfcn_t db_show_local6;
static db_varfcn_t db_show_local7;
static void db_print_trap(struct trapframe *);
static int db_print_trap(struct trapframe *);
extern char tl1_trap[];
extern char tl0_trap_flushed[];
extern char tl0_trap_withstack[];
extern char _start[];
extern char _end[];
#define INKERNEL(va) \
((va) >= (u_long)_start && (va) <= (u_long)_end)
struct db_variable db_regs[] = {
{ "g0", &ddb_regs.tf_global[0], FCN_NULL },
@ -116,8 +120,10 @@ db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
db_addr_t npc;
db_addr_t pc;
int trap;
int user;
trap = 0;
user = 0;
npc = 0;
if (count == -1)
count = 1024;
@ -126,24 +132,32 @@ db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
fp = (struct frame *)(kfp->kf_cfp + SPOFF);
} else
fp = (struct frame *)(addr + SPOFF);
while (count-- && INKERNEL((vm_offset_t)fp)) {
while (count-- && !user) {
pc = (db_addr_t)db_get_value((db_addr_t)&fp->f_pc,
sizeof(db_addr_t), FALSE);
if (trap) {
pc = npc;
trap = 0;
}
if (!INKERNEL((vm_offset_t)pc))
break;
sym = db_search_symbol(pc, DB_STGY_ANY, &offset);
db_symbol_values(sym, &name, &value);
if (sym == C_DB_SYM_NULL) {
value = 0;
name = NULL;
} else
db_symbol_values(sym, &name, &value);
if (name == NULL)
name = "(null)";
if (value == (u_long)tl1_trap) {
if (value == (u_long)tl1_trap ||
value == (u_long)tl0_trap_flushed ||
value == (u_long)tl0_trap_withstack) {
nfp = db_get_value((db_addr_t)&fp->f_fp,
sizeof(u_long), FALSE) + SPOFF;
tf = (struct trapframe *)(nfp + sizeof(*fp));
npc = db_get_value((db_addr_t)&tf->tf_tpc,
sizeof(u_long), FALSE);
db_print_trap(tf);
user = db_print_trap(tf);
trap = 1;
} else {
db_printf("%s() at ", name);
@ -155,7 +169,7 @@ db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
}
}
static void
static int
db_print_trap(struct trapframe *tf)
{
struct mmuframe *mf;
@ -165,6 +179,8 @@ db_print_trap(struct trapframe *tf)
type = db_get_value((db_addr_t)&tf->tf_type, sizeof(u_long), FALSE);
db_printf("-- %s trap (%s) -- ", type & T_KERNEL ? "kernel" : "user",
trap_msg[type & ~T_KERNEL]);
if ((type & T_KERNEL) == 0)
db_printf("tpc = %p, tnpc = %p ", tf->tf_tpc, tf->tf_tnpc);
switch (type & ~T_KERNEL) {
case T_ALIGN:
mf = (struct mmuframe *)db_get_value((db_addr_t)&tf->tf_arg,
@ -177,6 +193,7 @@ db_print_trap(struct trapframe *tf)
break;
}
db_printf("\n");
return ((type & T_KERNEL) == 0);
}
DB_COMMAND(down, db_frame_down)