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Message-Id: <1480086747-2393-3-git-send-email-acme@kernel.org>
Date: Fri, 25 Nov 2016 12:12:17 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Chris Riyder <chris.ryder@....com>,
David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...nel.org>,
Kim Phillips <kim.phillips@....com>,
Markus Trippelsdorf <markus@...ppelsdorf.de>,
Masami Hiramatsu <mhiramat@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
"Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
Pawel Moll <pawel.moll@....com>,
Peter Zijlstra <peterz@...radead.org>,
Russell King <rmk+kernel@....linux.org.uk>,
Taeung Song <treeze.taeung@...il.com>,
Wang Nan <wangnan0@...wei.com>
Subject: [PATCH 02/12] perf annotate: Introduce alternative method of keeping instructions table
From: Arnaldo Carvalho de Melo <acme@...hat.com>
Some arches may want to dynamically populate the table using regular
expressions on the instruction names to associate them with a set of
parsing/formatting/etc functions (struct ins_ops), so provide a fallback
for when the ins__find() method fails.
That fall back will be able to resize the arch->instructions, setting
arch->nr_instructions appropriately, helper functions to associate an
ins_ops to an instruction name, growing the arch->instructions if needed
and resorting it are provided, all the arch specific callback needs to
do is to decide if the missing instruction should be added to
arch->instructions with a ins_ops association.
Reviewed-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Chris Riyder <chris.ryder@....com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kim Phillips <kim.phillips@....com>
Cc: Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Cc: Pawel Moll <pawel.moll@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Russell King <rmk+kernel@....linux.org.uk>
Cc: Taeung Song <treeze.taeung@...il.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/n/tip-auu13yradxf7g5dgtpnzt97a@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/util/annotate.c | 63 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 62 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index b48a39be071b..026915a7dac8 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -29,12 +29,15 @@ const char *objdump_path;
static regex_t file_lineno;
static struct ins_ops *ins__find(struct arch *arch, const char *name);
+static void ins__sort(struct arch *arch);
static int disasm_line__parse(char *line, const char **namep, char **rawp);
struct arch {
const char *name;
struct ins *instructions;
size_t nr_instructions;
+ size_t nr_instructions_allocated;
+ struct ins_ops *(*associate_instruction_ops)(struct arch *arch, const char *name);
bool sorted_instructions;
struct {
char comment_char;
@@ -50,6 +53,54 @@ static struct ins_ops nop_ops;
static struct ins_ops lock_ops;
static struct ins_ops ret_ops;
+static int arch__grow_instructions(struct arch *arch)
+{
+ struct ins *new_instructions;
+ size_t new_nr_allocated;
+
+ if (arch->nr_instructions_allocated == 0 && arch->instructions)
+ goto grow_from_non_allocated_table;
+
+ new_nr_allocated = arch->nr_instructions_allocated + 128;
+ new_instructions = realloc(arch->instructions, new_nr_allocated * sizeof(struct ins));
+ if (new_instructions == NULL)
+ return -1;
+
+out_update_instructions:
+ arch->instructions = new_instructions;
+ arch->nr_instructions_allocated = new_nr_allocated;
+ return 0;
+
+grow_from_non_allocated_table:
+ new_nr_allocated = arch->nr_instructions + 128;
+ new_instructions = calloc(new_nr_allocated, sizeof(struct ins));
+ if (new_instructions == NULL)
+ return -1;
+
+ memcpy(new_instructions, arch->instructions, arch->nr_instructions);
+ goto out_update_instructions;
+}
+
+static __maybe_unused int arch__associate_ins_ops(struct arch* arch, const char *name, struct ins_ops *ops)
+{
+ struct ins *ins;
+
+ if (arch->nr_instructions == arch->nr_instructions_allocated &&
+ arch__grow_instructions(arch))
+ return -1;
+
+ ins = &arch->instructions[arch->nr_instructions];
+ ins->name = strdup(name);
+ if (!ins->name)
+ return -1;
+
+ ins->ops = ops;
+ arch->nr_instructions++;
+
+ ins__sort(arch);
+ return 0;
+}
+
#include "arch/arm/annotate/instructions.c"
#include "arch/x86/annotate/instructions.c"
@@ -419,7 +470,7 @@ static void ins__sort(struct arch *arch)
qsort(arch->instructions, nmemb, sizeof(struct ins), ins__cmp);
}
-static struct ins_ops *ins__find(struct arch *arch, const char *name)
+static struct ins_ops *__ins__find(struct arch *arch, const char *name)
{
struct ins *ins;
const int nmemb = arch->nr_instructions;
@@ -433,6 +484,16 @@ static struct ins_ops *ins__find(struct arch *arch, const char *name)
return ins ? ins->ops : NULL;
}
+static struct ins_ops *ins__find(struct arch *arch, const char *name)
+{
+ struct ins_ops *ops = __ins__find(arch, name);
+
+ if (!ops && arch->associate_instruction_ops)
+ ops = arch->associate_instruction_ops(arch, name);
+
+ return ops;
+}
+
static int arch__key_cmp(const void *name, const void *archp)
{
const struct arch *arch = archp;
--
2.7.4
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