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perf: Use die() for error cases in perf-probe

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Use die() for exiting perf-probe with errors. This replaces
perror_exit(), msg_exit() and fprintf()+exit() with die(), and
uses die() in semantic_error().

This also renames 'die' local variables to 'dw_die' for avoiding
name confliction.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20091017000801.16556.46866.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Masami Hiramatsu
2009-10-16 20:08:01 -04:00
committed by Ingo Molnar
parent 4c20194c2d
commit 074fc0e4b3
2 changed files with 34 additions and 68 deletions
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55
tools/perf/util/probe-finder.c
View File

@@ -31,6 +31,8 @@
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#include "util.h"
#include "probe-finder.h"
@@ -43,20 +45,6 @@ struct die_link {
static Dwarf_Debug __dw_debug;
static Dwarf_Error __dw_error;
static void msg_exit(int ret, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "Error: ");
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(ret);
}
/*
* Generic dwarf analysis helpers
*/
@@ -151,11 +139,11 @@ static Dwarf_Unsigned die_get_fileno(Dwarf_Die cu_die, const char *fname)
}
/* Compare diename and tname */
static int die_compare_name(Dwarf_Die die, const char *tname)
static int die_compare_name(Dwarf_Die dw_die, const char *tname)
{
char *name;
int ret;
ret = dwarf_diename(die, &name, &__dw_error);
ret = dwarf_diename(dw_die, &name, &__dw_error);
ERR_IF(ret == DW_DLV_ERROR);
if (ret == DW_DLV_OK) {
ret = strcmp(tname, name);
@@ -187,25 +175,25 @@ static int die_within_subprogram(Dwarf_Die sp_die, Dwarf_Addr addr,
}
/* Check the die is inlined function */
static Dwarf_Bool die_inlined_subprogram(Dwarf_Die die)
static Dwarf_Bool die_inlined_subprogram(Dwarf_Die dw_die)
{
/* TODO: check strictly */
Dwarf_Bool inl;
int ret;
ret = dwarf_hasattr(die, DW_AT_inline, &inl, &__dw_error);
ret = dwarf_hasattr(dw_die, DW_AT_inline, &inl, &__dw_error);
ERR_IF(ret == DW_DLV_ERROR);
return inl;
}
/* Get the offset of abstruct_origin */
static Dwarf_Off die_get_abstract_origin(Dwarf_Die die)
static Dwarf_Off die_get_abstract_origin(Dwarf_Die dw_die)
{
Dwarf_Attribute attr;
Dwarf_Off cu_offs;
int ret;
ret = dwarf_attr(die, DW_AT_abstract_origin, &attr, &__dw_error);
ret = dwarf_attr(dw_die, DW_AT_abstract_origin, &attr, &__dw_error);
ERR_IF(ret != DW_DLV_OK);
ret = dwarf_formref(attr, &cu_offs, &__dw_error);
ERR_IF(ret != DW_DLV_OK);
@@ -214,7 +202,7 @@ static Dwarf_Off die_get_abstract_origin(Dwarf_Die die)
}
/* Get entry pc(or low pc, 1st entry of ranges) of the die */
static Dwarf_Addr die_get_entrypc(Dwarf_Die die)
static Dwarf_Addr die_get_entrypc(Dwarf_Die dw_die)
{
Dwarf_Attribute attr;
Dwarf_Addr addr;
@@ -224,7 +212,7 @@ static Dwarf_Addr die_get_entrypc(Dwarf_Die die)
int ret;
/* Try to get entry pc */
ret = dwarf_attr(die, DW_AT_entry_pc, &attr, &__dw_error);
ret = dwarf_attr(dw_die, DW_AT_entry_pc, &attr, &__dw_error);
ERR_IF(ret == DW_DLV_ERROR);
if (ret == DW_DLV_OK) {
ret = dwarf_formaddr(attr, &addr, &__dw_error);
@@ -234,13 +222,13 @@ static Dwarf_Addr die_get_entrypc(Dwarf_Die die)
}
/* Try to get low pc */
ret = dwarf_lowpc(die, &addr, &__dw_error);
ret = dwarf_lowpc(dw_die, &addr, &__dw_error);
ERR_IF(ret == DW_DLV_ERROR);
if (ret == DW_DLV_OK)
return addr;
/* Try to get ranges */
ret = dwarf_attr(die, DW_AT_ranges, &attr, &__dw_error);
ret = dwarf_attr(dw_die, DW_AT_ranges, &attr, &__dw_error);
ERR_IF(ret != DW_DLV_OK);
ret = dwarf_formref(attr, &offs, &__dw_error);
ERR_IF(ret != DW_DLV_OK);
@@ -382,11 +370,11 @@ static void show_location(Dwarf_Loc *loc, struct probe_finder *pf)
} else if (op == DW_OP_regx) {
regn = loc->lr_number;
} else
msg_exit(-EINVAL, "Dwarf_OP %d is not supported.\n", op);
die("Dwarf_OP %d is not supported.\n", op);
regs = get_arch_regstr(regn);
if (!regs)
msg_exit(-EINVAL, "%lld exceeds max register number.\n", regn);
die("%lld exceeds max register number.\n", regn);
if (deref)
ret = snprintf(pf->buf, pf->len,
@@ -417,8 +405,8 @@ static void show_variable(Dwarf_Die vr_die, struct probe_finder *pf)
dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
return ;
error:
msg_exit(-1, "Failed to find the location of %s at this address.\n"
" Perhaps, it was optimized out.\n", pf->var);
die("Failed to find the location of %s at this address.\n"
" Perhaps, it has been optimized out.\n", pf->var);
}
static int variable_callback(struct die_link *dlink, void *data)
@@ -456,8 +444,7 @@ static void find_variable(Dwarf_Die sp_die, struct probe_finder *pf)
/* Search child die for local variables and parameters. */
ret = search_die_from_children(sp_die, variable_callback, pf);
if (!ret)
msg_exit(-1, "Failed to find '%s' in this function.\n",
pf->var);
die("Failed to find '%s' in this function.\n", pf->var);
}
/* Get a frame base on the address */
@@ -568,8 +555,7 @@ static void find_by_line(Dwarf_Die cu_die, struct probe_finder *pf)
/* Search a real subprogram including this line, */
ret = search_die_from_children(cu_die, probeaddr_callback, pf);
if (ret == 0)
msg_exit(-1,
"Probe point is not found in subprograms.\n");
die("Probe point is not found in subprograms.\n");
/* Continuing, because target line might be inlined. */
}
dwarf_srclines_dealloc(__dw_debug, lines, cnt);
@@ -621,7 +607,7 @@ static int probefunc_callback(struct die_link *dlink, void *data)
!die_inlined_subprogram(lk->die))
goto found;
}
msg_exit(-1, "Failed to find real subprogram.\n");
die("Failed to find real subprogram.\n");
found:
/* Get offset from subprogram */
ret = die_within_subprogram(lk->die, pf->addr, &offs);
@@ -649,8 +635,7 @@ int find_probepoint(int fd, struct probe_point *pp)
ret = dwarf_init(fd, DW_DLC_READ, 0, 0, &__dw_debug, &__dw_error);
if (ret != DW_DLV_OK)
msg_exit(-1, "Failed to call dwarf_init(). "
"Maybe, not a dwarf file?\n");
die("Failed to call dwarf_init(). Maybe, not a dwarf file.\n");
pp->found = 0;
while (++cu_number) {