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Code Issues Releases Activity

- In db_stack_trace_cmd() bail out if we get confused about the stack.

Browse Source 
Tested by:	kkenn
Approved by:	re (scottl)
This commit is contained in:
Jeff Roberson 2003-11-29 11:57:02 +00:00
parent b1893845bd
commit 2d5d22656d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=123046
1 changed files with 8 additions and 3 deletions
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11
sys/alpha/alpha/db_trace.c
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@ -112,7 +112,7 @@ void db_md_list_watchpoints(void);
* Decode the function prologue for the function we're in, and note
* which registers are stored where, and how large the stack frame is.
*/
static void
static int
decode_prologue(db_addr_t callpc, db_addr_t func,
struct prologue_info *pi)
{
@ -127,6 +127,7 @@ decode_prologue(db_addr_t callpc, db_addr_t func,
do { \
if (pi->pi_frame_size != 0) { \
db_printf("frame size botch: adjust register offsets?\n"); \
return (1); \
} \
} while (0)
@ -143,9 +144,11 @@ do { \
*/
signed_immediate = (long)ins.mem_format.displacement;
#if 1
if (signed_immediate > 0)
if (signed_immediate > 0) {
db_printf("prologue botch: displacement %ld\n",
signed_immediate);
return (1);
}
#endif
CHECK_FRAMESIZE;
pi->pi_frame_size += -signed_immediate;
@ -169,6 +172,7 @@ do { \
pi->pi_reg_offset[ins.mem_format.rd] = signed_immediate;
}
}
return (0);
}
static int
@ -363,7 +367,8 @@ db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count, char *m
*
* XXX How does this interact w/ alloca()?!
*/
decode_prologue(callpc, symval, &pi);
if (decode_prologue(callpc, symval, &pi))
return;
if ((pi.pi_regmask & (1 << 26)) == 0) {
/*
* No saved RA found. We might have RA from