perf: Add DIE_IF() macro for error checking
Masami Hiramatsu [Sat, 17 Oct 2009 00:08:18 +0000 (20:08 -0400)]
Add DIE_IF() macro and replace ERR_IF() with it, and use
linux/stringify.h.

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: <20091017000818.16556.82452.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

tools/perf/Makefile
tools/perf/util/probe-finder.c
tools/perf/util/probe-finder.h
tools/perf/util/util.h

index 03c27b9..1abbf9a 100644 (file)
@@ -321,6 +321,7 @@ LIB_FILE=libperf.a
 LIB_H += ../../include/linux/perf_event.h
 LIB_H += ../../include/linux/rbtree.h
 LIB_H += ../../include/linux/list.h
+LIB_H += ../../include/linux/stringify.h
 LIB_H += util/include/linux/list.h
 LIB_H += perf.h
 LIB_H += util/types.h
index db24c91..be997ab 100644 (file)
@@ -146,7 +146,7 @@ static int die_compare_name(Dwarf_Die dw_die, const char *tname)
        char *name;
        int ret;
        ret = dwarf_diename(dw_die, &name, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (ret == DW_DLV_OK) {
                ret = strcmp(tname, name);
                dwarf_dealloc(__dw_debug, name, DW_DLA_STRING);
@@ -164,11 +164,11 @@ static int die_within_subprogram(Dwarf_Die sp_die, Dwarf_Addr addr,
 
        /* TODO: check ranges */
        ret = dwarf_lowpc(sp_die, &lopc, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (ret == DW_DLV_NO_ENTRY)
                return 0;
        ret = dwarf_highpc(sp_die, &hipc, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        if (lopc <= addr && addr < hipc) {
                *offs = addr - lopc;
                return 1;
@@ -184,7 +184,7 @@ static Dwarf_Bool die_inlined_subprogram(Dwarf_Die dw_die)
        int ret;
 
        ret = dwarf_hasattr(dw_die, DW_AT_inline, &inl, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        return inl;
 }
 
@@ -196,9 +196,9 @@ static Dwarf_Off die_get_abstract_origin(Dwarf_Die dw_die)
        int ret;
 
        ret = dwarf_attr(dw_die, DW_AT_abstract_origin, &attr, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        ret = dwarf_formref(attr, &cu_offs, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
        return cu_offs;
 }
@@ -215,28 +215,28 @@ static Dwarf_Addr die_get_entrypc(Dwarf_Die dw_die)
 
        /* Try to get entry pc */
        ret = dwarf_attr(dw_die, DW_AT_entry_pc, &attr, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (ret == DW_DLV_OK) {
                ret = dwarf_formaddr(attr, &addr, &__dw_error);
-               ERR_IF(ret != DW_DLV_OK);
+               DIE_IF(ret != DW_DLV_OK);
                dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
                return addr;
        }
 
        /* Try to get low pc */
        ret = dwarf_lowpc(dw_die, &addr, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (ret == DW_DLV_OK)
                return addr;
 
        /* Try to get ranges */
        ret = dwarf_attr(dw_die, DW_AT_ranges, &attr, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        ret = dwarf_formref(attr, &offs, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        ret = dwarf_get_ranges(__dw_debug, offs, &ranges, &cnt, NULL,
                                &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        addr = ranges[0].dwr_addr1;
        dwarf_ranges_dealloc(__dw_debug, ranges, cnt);
        return addr;
@@ -261,7 +261,7 @@ static int __search_die_tree(struct die_link *cur_link,
        while (!(ret = die_cb(cur_link, data))) {
                /* Check child die */
                ret = dwarf_child(cur_link->die, &new_die, &__dw_error);
-               ERR_IF(ret == DW_DLV_ERROR);
+               DIE_IF(ret == DW_DLV_ERROR);
                if (ret == DW_DLV_OK) {
                        new_link.parent = cur_link;
                        new_link.die = new_die;
@@ -273,7 +273,7 @@ static int __search_die_tree(struct die_link *cur_link,
                /* Move to next sibling */
                ret = dwarf_siblingof(__dw_debug, cur_link->die, &new_die,
                                      &__dw_error);
-               ERR_IF(ret == DW_DLV_ERROR);
+               DIE_IF(ret == DW_DLV_ERROR);
                dwarf_dealloc(__dw_debug, cur_link->die, DW_DLA_DIE);
                cur_link->die = new_die;
                if (ret == DW_DLV_NO_ENTRY)
@@ -293,7 +293,7 @@ static int search_die_from_children(Dwarf_Die parent_die,
 
        new_link.parent = NULL;
        ret = dwarf_child(parent_die, &new_link.die, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (ret == DW_DLV_OK)
                return __search_die_tree(&new_link, die_cb, data);
        else
@@ -309,7 +309,7 @@ static int attr_get_locdesc(Dwarf_Attribute attr, Dwarf_Locdesc *desc,
        int ret, i;
 
        ret = dwarf_loclist_n(attr, &llbuf, &lcnt, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        ret = DW_DLV_NO_ENTRY;
        for (i = 0; i < lcnt; ++i) {
                if (llbuf[i]->ld_lopc <= addr &&
@@ -317,7 +317,7 @@ static int attr_get_locdesc(Dwarf_Attribute attr, Dwarf_Locdesc *desc,
                        memcpy(desc, llbuf[i], sizeof(Dwarf_Locdesc));
                        desc->ld_s =
                                malloc(sizeof(Dwarf_Loc) * llbuf[i]->ld_cents);
-                       ERR_IF(desc->ld_s == NULL);
+                       DIE_IF(desc->ld_s == NULL);
                        memcpy(desc->ld_s, llbuf[i]->ld_s,
                                sizeof(Dwarf_Loc) * llbuf[i]->ld_cents);
                        ret = DW_DLV_OK;
@@ -383,8 +383,8 @@ static void show_location(Dwarf_Loc *loc, struct probe_finder *pf)
                                 " %s=%+lld(%s)", pf->var, offs, regs);
        else
                ret = snprintf(pf->buf, pf->len, " %s=%s", pf->var, regs);
-       ERR_IF(ret < 0);
-       ERR_IF(ret >= pf->len);
+       DIE_IF(ret < 0);
+       DIE_IF(ret >= pf->len);
 }
 
 /* Show a variables in kprobe event format */
@@ -401,7 +401,7 @@ static void show_variable(Dwarf_Die vr_die, struct probe_finder *pf)
        if (ret != DW_DLV_OK)
                goto error;
        /* TODO? */
-       ERR_IF(ld.ld_cents != 1);
+       DIE_IF(ld.ld_cents != 1);
        show_location(&ld.ld_s[0], pf);
        free(ld.ld_s);
        dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
@@ -418,7 +418,7 @@ static int variable_callback(struct die_link *dlink, void *data)
        int ret;
 
        ret = dwarf_tag(dlink->die, &tag, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if ((tag == DW_TAG_formal_parameter ||
             tag == DW_TAG_variable) &&
            (die_compare_name(dlink->die, pf->var) == 0)) {
@@ -437,8 +437,8 @@ static void find_variable(Dwarf_Die sp_die, struct probe_finder *pf)
        if (!is_c_varname(pf->var)) {
                /* Output raw parameters */
                ret = snprintf(pf->buf, pf->len, " %s", pf->var);
-               ERR_IF(ret < 0);
-               ERR_IF(ret >= pf->len);
+               DIE_IF(ret < 0);
+               DIE_IF(ret >= pf->len);
                return ;
        }
 
@@ -456,9 +456,9 @@ static void get_current_frame_base(Dwarf_Die sp_die, struct probe_finder *pf)
        int ret;
 
        ret = dwarf_attr(sp_die, DW_AT_frame_base, &attr, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        ret = attr_get_locdesc(attr, &pf->fbloc, (pf->addr - pf->cu_base));
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
        dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
 }
 
@@ -479,7 +479,7 @@ static void show_probepoint(Dwarf_Die sp_die, Dwarf_Signed offs,
 
        /* Output name of probe point */
        ret = dwarf_diename(sp_die, &name, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (ret == DW_DLV_OK) {
                ret = snprintf(tmp, MAX_PROBE_BUFFER, "%s+%u", name,
                                (unsigned int)offs);
@@ -488,8 +488,8 @@ static void show_probepoint(Dwarf_Die sp_die, Dwarf_Signed offs,
                /* This function has no name. */
                ret = snprintf(tmp, MAX_PROBE_BUFFER, "0x%llx", pf->addr);
        }
-       ERR_IF(ret < 0);
-       ERR_IF(ret >= MAX_PROBE_BUFFER);
+       DIE_IF(ret < 0);
+       DIE_IF(ret >= MAX_PROBE_BUFFER);
        len = ret;
 
        /* Find each argument */
@@ -515,7 +515,7 @@ static int probeaddr_callback(struct die_link *dlink, void *data)
        int ret;
 
        ret = dwarf_tag(dlink->die, &tag, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        /* Check the address is in this subprogram */
        if (tag == DW_TAG_subprogram &&
            die_within_subprogram(dlink->die, pf->addr, &offs)) {
@@ -537,21 +537,21 @@ static void find_by_line(Dwarf_Die cu_die, struct probe_finder *pf)
        int ret;
 
        ret = dwarf_srclines(cu_die, &lines, &cnt, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
 
        for (i = 0; i < cnt; i++) {
                ret = dwarf_line_srcfileno(lines[i], &fno, &__dw_error);
-               ERR_IF(ret != DW_DLV_OK);
+               DIE_IF(ret != DW_DLV_OK);
                if (fno != pf->fno)
                        continue;
 
                ret = dwarf_lineno(lines[i], &lineno, &__dw_error);
-               ERR_IF(ret != DW_DLV_OK);
+               DIE_IF(ret != DW_DLV_OK);
                if (lineno != (Dwarf_Unsigned)pp->line)
                        continue;
 
                ret = dwarf_lineaddr(lines[i], &addr, &__dw_error);
-               ERR_IF(ret != DW_DLV_OK);
+               DIE_IF(ret != DW_DLV_OK);
                eprintf("Probe point found: 0x%llx\n", addr);
                pf->addr = addr;
                /* Search a real subprogram including this line, */
@@ -574,7 +574,7 @@ static int probefunc_callback(struct die_link *dlink, void *data)
        int ret;
 
        ret = dwarf_tag(dlink->die, &tag, &__dw_error);
-       ERR_IF(ret == DW_DLV_ERROR);
+       DIE_IF(ret == DW_DLV_ERROR);
        if (tag == DW_TAG_subprogram) {
                if (die_compare_name(dlink->die, pp->function) == 0) {
                        if (die_inlined_subprogram(dlink->die)) {
@@ -582,7 +582,7 @@ static int probefunc_callback(struct die_link *dlink, void *data)
                                ret = dwarf_die_CU_offset(dlink->die,
                                                          &pf->inl_offs,
                                                          &__dw_error);
-                               ERR_IF(ret != DW_DLV_OK);
+                               DIE_IF(ret != DW_DLV_OK);
                                eprintf("inline definition offset %lld\n",
                                        pf->inl_offs);
                                return 0;
@@ -604,7 +604,7 @@ static int probefunc_callback(struct die_link *dlink, void *data)
                        for (lk = dlink->parent; lk != NULL; lk = lk->parent) {
                                tag = 0;
                                dwarf_tag(lk->die, &tag, &__dw_error);
-                               ERR_IF(ret == DW_DLV_ERROR);
+                               DIE_IF(ret == DW_DLV_ERROR);
                                if (tag == DW_TAG_subprogram &&
                                    !die_inlined_subprogram(lk->die))
                                        goto found;
@@ -613,7 +613,7 @@ static int probefunc_callback(struct die_link *dlink, void *data)
 found:
                        /* Get offset from subprogram */
                        ret = die_within_subprogram(lk->die, pf->addr, &offs);
-                       ERR_IF(!ret);
+                       DIE_IF(!ret);
                        show_probepoint(lk->die, offs, pf);
                        /* Continue to search */
                }
@@ -644,13 +644,13 @@ int find_probepoint(int fd, struct probe_point *pp)
                /* Search CU (Compilation Unit) */
                ret = dwarf_next_cu_header(__dw_debug, NULL, NULL, NULL,
                        &addr_size, &next_cuh, &__dw_error);
-               ERR_IF(ret == DW_DLV_ERROR);
+               DIE_IF(ret == DW_DLV_ERROR);
                if (ret == DW_DLV_NO_ENTRY)
                        break;
 
                /* Get the DIE(Debugging Information Entry) of this CU */
                ret = dwarf_siblingof(__dw_debug, 0, &cu_die, &__dw_error);
-               ERR_IF(ret != DW_DLV_OK);
+               DIE_IF(ret != DW_DLV_OK);
 
                /* Check if target file is included. */
                if (pp->file)
@@ -659,7 +659,7 @@ int find_probepoint(int fd, struct probe_point *pp)
                if (!pp->file || pf.fno) {
                        /* Save CU base address (for frame_base) */
                        ret = dwarf_lowpc(cu_die, &pf.cu_base, &__dw_error);
-                       ERR_IF(ret == DW_DLV_ERROR);
+                       DIE_IF(ret == DW_DLV_ERROR);
                        if (ret == DW_DLV_NO_ENTRY)
                                pf.cu_base = 0;
                        if (pp->line)
@@ -670,7 +670,7 @@ int find_probepoint(int fd, struct probe_point *pp)
                dwarf_dealloc(__dw_debug, cu_die, DW_DLA_DIE);
        }
        ret = dwarf_finish(__dw_debug, &__dw_error);
-       ERR_IF(ret != DW_DLV_OK);
+       DIE_IF(ret != DW_DLV_OK);
 
        return pp->found;
 }
index 6a7cb0c..d17fafc 100644 (file)
@@ -1,16 +1,6 @@
 #ifndef _PROBE_FINDER_H
 #define _PROBE_FINDER_H
 
-#define _stringify(n)  #n
-#define stringify(n)   _stringify(n)
-
-#define ERR_IF(cnd)    \
-       do { if (cnd) { \
-               fprintf(stderr, "Error (" __FILE__ ":" stringify(__LINE__) \
-                       "): " stringify(cnd) "\n");                     \
-               exit(1);                                                \
-       } } while (0)
-
 #define MAX_PATH_LEN 256
 #define MAX_PROBE_BUFFER 1024
 #define MAX_PROBES 128
index 9de2329..0daa341 100644 (file)
@@ -134,6 +134,15 @@ extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1,
 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 
+#include "../../../include/linux/stringify.h"
+
+#define DIE_IF(cnd)    \
+       do { if (cnd)   \
+               die(" at (" __FILE__ ":" __stringify(__LINE__) "): "    \
+                   __stringify(cnd) "\n");                             \
+       } while (0)
+
+
 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 
 extern int prefixcmp(const char *str, const char *prefix);