[PATCH v3 09/11] perf libdw: Remove unnecessary defines

Ian Rogers
2024-10-17T00:42:56Z

As HAVE_DWARF_GETLOCATIONS_SUPPORT and HAVE_DWARF_CFI_SUPPORT always
match HAVE_DWARF_SUPPORT remove the macros and use
HAVE_DWARF_SUPPORT. If building the file is guarded by CONFIG_DWARF
then remove all ifs.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/Documentation/perf-check.txt | 2 +-
tools/perf/Makefile.config | 3 --
tools/perf/builtin-annotate.c | 2 +-
tools/perf/builtin-check.c | 2 +-
tools/perf/builtin-report.c | 2 +-
tools/perf/util/dwarf-aux.c | 6 ---
tools/perf/util/dwarf-aux.h | 54 -------------------------
tools/perf/util/probe-finder.c | 4 --
8 files changed, 4 insertions(+), 71 deletions(-)

diff --git a/tools/perf/Documentation/perf-check.txt b/tools/perf/Documentation/perf-check.txt
index 10f69fb6850b..45101a8e4154 100644
--- a/tools/perf/Documentation/perf-check.txt
+++ b/tools/perf/Documentation/perf-check.txt
@@ -48,7 +48,7 @@ feature::
bpf_skeletons / HAVE_BPF_SKEL
debuginfod / HAVE_DEBUGINFOD_SUPPORT
dwarf / HAVE_DWARF_SUPPORT
- dwarf_getlocations / HAVE_DWARF_GETLOCATIONS_SUPPORT
+ dwarf_getlocations / HAVE_DWARF_SUPPORT
dwarf-unwind / HAVE_DWARF_UNWIND_SUPPORT
auxtrace / HAVE_AUXTRACE_SUPPORT
libaudit / HAVE_LIBAUDIT_SUPPORT
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 6378811f2568..7dbcf8394f3d 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -466,9 +466,6 @@ else
$(warning No libdw.h found or old libdw.h found or elfutils is older than 0.157, disables dwarf support. Please install new elfutils-devel/libdw-dev)
NO_LIBDW := 1
endif
- else
- CFLAGS += -DHAVE_DWARF_GETLOCATIONS_SUPPORT
- CFLAGS += -DHAVE_DWARF_CFI_SUPPORT
endif # Dwarf support
endif # libelf support
endif # NO_LIBELF
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 3dc6197ef3fa..04af13eb4a4c 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -840,7 +840,7 @@ int cmd_annotate(int argc, const char **argv)
}
#endif

-#ifndef HAVE_DWARF_GETLOCATIONS_SUPPORT
+#ifndef HAVE_DWARF_SUPPORT
if (annotate.data_type) {
pr_err("Error: Data type profiling is disabled due to missing DWARF support\n");
return -ENOTSUP;
diff --git a/tools/perf/builtin-check.c b/tools/perf/builtin-check.c
index 0b76b6e42b78..18c0a815243b 100644
--- a/tools/perf/builtin-check.c
+++ b/tools/perf/builtin-check.c
@@ -28,7 +28,7 @@ struct feature_status supported_features[] = {
FEATURE_STATUS("bpf_skeletons", HAVE_BPF_SKEL),
FEATURE_STATUS("debuginfod", HAVE_DEBUGINFOD_SUPPORT),
FEATURE_STATUS("dwarf", HAVE_DWARF_SUPPORT),
- FEATURE_STATUS("dwarf_getlocations", HAVE_DWARF_GETLOCATIONS_SUPPORT),
+ FEATURE_STATUS("dwarf_getlocations", HAVE_DWARF_SUPPORT),
FEATURE_STATUS("dwarf-unwind", HAVE_DWARF_UNWIND_SUPPORT),
FEATURE_STATUS("auxtrace", HAVE_AUXTRACE_SUPPORT),
FEATURE_STATUS("libaudit", HAVE_LIBAUDIT_SUPPORT),
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 36b344e39dd6..2251aa61ea53 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1705,7 +1705,7 @@ int cmd_report(int argc, const char **argv)
report.data_type = true;
annotate_opts.annotate_src = false;

-#ifndef HAVE_DWARF_GETLOCATIONS_SUPPORT
+#ifndef HAVE_DWARF_SUPPORT
pr_err("Error: Data type profiling is disabled due to missing DWARF support\n");
goto error;
#endif
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index 92eb9c8dc3e5..559c953ca172 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1182,7 +1182,6 @@ int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf)
return ret < 0 ? ret : strbuf_addf(buf, "\t%s", dwarf_diename(vr_die));
}

-#if defined(HAVE_DWARF_GETLOCATIONS_SUPPORT) || defined(HAVE_DWARF_CFI_SUPPORT)
static int reg_from_dwarf_op(Dwarf_Op *op)
{
switch (op->atom) {
@@ -1245,9 +1244,7 @@ static bool check_allowed_ops(Dwarf_Op *ops, size_t nops)
}
return true;
}
-#endif /* HAVE_DWARF_GETLOCATIONS_SUPPORT || HAVE_DWARF_CFI_SUPPORT */

-#ifdef HAVE_DWARF_GETLOCATIONS_SUPPORT
/**
* die_get_var_innermost_scope - Get innermost scope range of given variable DIE
* @sp_die: a subprogram DIE
@@ -1697,9 +1694,7 @@ void die_collect_global_vars(Dwarf_Die *cu_die, struct die_var_type **var_types)

die_find_child(cu_die, __die_collect_global_vars_cb, (void *)var_types, &die_mem);
}
-#endif /* HAVE_DWARF_GETLOCATIONS_SUPPORT */

-#ifdef HAVE_DWARF_CFI_SUPPORT
/**
* die_get_cfa - Get frame base information
* @dwarf: a Dwarf info
@@ -1732,7 +1727,6 @@ int die_get_cfa(Dwarf *dwarf, u64 pc, int *preg, int *poffset)
}
return -1;
}
-#endif /* HAVE_DWARF_CFI_SUPPORT */

/*
* die_has_loclist - Check if DW_AT_location of @vr_die is a location list
diff --git a/tools/perf/util/dwarf-aux.h b/tools/perf/util/dwarf-aux.h
index bd7505812569..892c8c5c23fc 100644
--- a/tools/perf/util/dwarf-aux.h
+++ b/tools/perf/util/dwarf-aux.h
@@ -9,7 +9,6 @@
#include <elfutils/libdw.h>
#include <elfutils/libdwfl.h>
#include <elfutils/version.h>
-#include <errno.h>

struct strbuf;

@@ -157,8 +156,6 @@ Dwarf_Die *die_get_member_type(Dwarf_Die *type_die, int offset, Dwarf_Die *die_m
/* Return type info where the pointer and offset point to */
Dwarf_Die *die_deref_ptr_type(Dwarf_Die *ptr_die, int offset, Dwarf_Die *die_mem);

-#ifdef HAVE_DWARF_GETLOCATIONS_SUPPORT
-
/* Get byte offset range of given variable DIE */
int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf);

@@ -177,58 +174,7 @@ void die_collect_vars(Dwarf_Die *sc_die, struct die_var_type **var_types);
/* Save all global variables in this CU */
void die_collect_global_vars(Dwarf_Die *cu_die, struct die_var_type **var_types);

-#else /* HAVE_DWARF_GETLOCATIONS_SUPPORT */
-
-static inline int die_get_var_range(Dwarf_Die *sp_die __maybe_unused,
- Dwarf_Die *vr_die __maybe_unused,
- struct strbuf *buf __maybe_unused)
-{
- return -ENOTSUP;
-}
-
-static inline Dwarf_Die *die_find_variable_by_reg(Dwarf_Die *sc_die __maybe_unused,
- Dwarf_Addr pc __maybe_unused,
- int reg __maybe_unused,
- int *poffset __maybe_unused,
- bool is_fbreg __maybe_unused,
- Dwarf_Die *die_mem __maybe_unused)
-{
- return NULL;
-}
-
-static inline Dwarf_Die *die_find_variable_by_addr(Dwarf_Die *sc_die __maybe_unused,
- Dwarf_Addr addr __maybe_unused,
- Dwarf_Die *die_mem __maybe_unused,
- int *offset __maybe_unused)
-{
- return NULL;
-}
-
-static inline void die_collect_vars(Dwarf_Die *sc_die __maybe_unused,
- struct die_var_type **var_types __maybe_unused)
-{
-}
-
-static inline void die_collect_global_vars(Dwarf_Die *cu_die __maybe_unused,
- struct die_var_type **var_types __maybe_unused)
-{
-}
-
-#endif /* HAVE_DWARF_GETLOCATIONS_SUPPORT */
-
-#ifdef HAVE_DWARF_CFI_SUPPORT
-
/* Get the frame base information from CFA */
int die_get_cfa(Dwarf *dwarf, u64 pc, int *preg, int *poffset);

-#else /* HAVE_DWARF_CFI_SUPPORT */
-
-static inline int die_get_cfa(Dwarf *dwarf __maybe_unused, u64 pc __maybe_unused,
- int *preg __maybe_unused, int *poffset __maybe_unused)
-{
- return -1;
-}
-
-#endif /* HAVE_DWARF_CFI_SUPPORT */
-
#endif /* _DWARF_AUX_H */
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index b6775d3bdeac..8ea15a2a4397 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -602,7 +602,6 @@ static int call_probe_finder(Dwarf_Die *sc_die, struct probe_finder *pf)
ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1);
if (ret <= 0 || nops == 0) {
pf->fb_ops = NULL;
-#ifdef HAVE_DWARF_CFI_SUPPORT
} else if (nops == 1 && pf->fb_ops[0].atom == DW_OP_call_frame_cfa &&
(pf->cfi_eh != NULL || pf->cfi_dbg != NULL)) {
if ((dwarf_cfi_addrframe(pf->cfi_eh, pf->addr, &frame) != 0 &&
@@ -613,7 +612,6 @@ static int call_probe_finder(Dwarf_Die *sc_die, struct probe_finder *pf)
free(frame);
return -ENOENT;
}
-#endif /* HAVE_DWARF_CFI_SUPPORT */
}

/* Call finder's callback handler */
@@ -1138,7 +1136,6 @@ static int debuginfo__find_probes(struct debuginfo *dbg,

pf->machine = ehdr.e_machine;

-#ifdef HAVE_DWARF_CFI_SUPPORT
do {
GElf_Shdr shdr;

@@ -1148,7 +1145,6 @@ static int debuginfo__find_probes(struct debuginfo *dbg,

pf->cfi_dbg = dwarf_getcfi(dbg->dbg);
} while (0);
-#endif /* HAVE_DWARF_CFI_SUPPORT */

ret = debuginfo__find_probe_location(dbg, pf);
return ret;