perf disasm: Constify use of 'struct ins'

The 'struct ins' holds variables that are read but not written, except
during some initialization.

Change most uses to be for a "const struct ins *" version to capture
this immutability.

So the x86__instructions can be const pre-sort it and make the sorted
variable true.

Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Aditya Bodkhe <aditya.b1@linux.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Athira Rajeev <atrajeev@linux.ibm.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Dr. David Alan Gilbert <linux@treblig.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Julia Lawall <Julia.Lawall@inria.fr>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Krzysztof Łopatowski <krzysztof.m.lopatowski@gmail.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sergei Trofimovich <slyich@gmail.com>
Cc: Shimin Guo <shimin.guo@skydio.com>
Cc: Suchit Karunakaran <suchitkarunakaran@gmail.com>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Tianyou Li <tianyou.li@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zecheng Li <zecheng@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 40 insertions, 24 deletions

diff --git a/tools/perf/arch/arm64/annotate/instructions.c b/tools/perf/arch/arm64/annotate/instructions.c
index 363af2f55122..44db33854dba 100644
--- a/tools/perf/arch/arm64/annotate/instructions.c
+++ b/tools/perf/arch/arm64/annotate/instructions.c
@@ -60,7 +60,7 @@ out_free_source:
 	return -1;
 }
 
-static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
+static int mov__scnprintf(const struct ins *ins, char *bf, size_t size,
 			  struct ins_operands *ops, int max_ins_name);
 
 static const struct ins_ops arm64_mov_ops = {
diff --git a/tools/perf/arch/x86/annotate/instructions.c b/tools/perf/arch/x86/annotate/instructions.c
index 24b388bacdae..ffca3029388b 100644
--- a/tools/perf/arch/x86/annotate/instructions.c
+++ b/tools/perf/arch/x86/annotate/instructions.c
@@ -7,7 +7,7 @@
  * So this table should not have entries with the suffix unless it's
  * a complete different instruction than ones without the suffix.
  */
-static struct ins x86__instructions[] = {
+static const struct ins x86__instructions[] = {
 	{ .name = "adc",	.ops = &mov_ops,  },
 	{ .name = "add",	.ops = &mov_ops,  },
 	{ .name = "addsd",	.ops = &mov_ops,  },
@@ -19,9 +19,9 @@ static struct ins x86__instructions[] = {
 	{ .name = "btr",	.ops = &mov_ops,  },
 	{ .name = "bts",	.ops = &mov_ops,  },
 	{ .name = "call",	.ops = &call_ops, },
+	{ .name = "cmovae",	.ops = &mov_ops,  },
 	{ .name = "cmovbe",	.ops = &mov_ops,  },
 	{ .name = "cmove",	.ops = &mov_ops,  },
-	{ .name = "cmovae",	.ops = &mov_ops,  },
 	{ .name = "cmp",	.ops = &mov_ops,  },
 	{ .name = "cmpxch",	.ops = &mov_ops,  },
 	{ .name = "cmpxchg",	.ops = &mov_ops,  },
@@ -73,23 +73,23 @@ static struct ins x86__instructions[] = {
 	{ .name = "movaps",	.ops = &mov_ops,  },
 	{ .name = "movdqa",	.ops = &mov_ops,  },
 	{ .name = "movdqu",	.ops = &mov_ops,  },
+	{ .name = "movsb",	.ops = &mov_ops,  },
 	{ .name = "movsd",	.ops = &mov_ops,  },
+	{ .name = "movsl",	.ops = &mov_ops,  },
 	{ .name = "movss",	.ops = &mov_ops,  },
-	{ .name = "movsb",	.ops = &mov_ops,  },
 	{ .name = "movsw",	.ops = &mov_ops,  },
-	{ .name = "movsl",	.ops = &mov_ops,  },
 	{ .name = "movupd",	.ops = &mov_ops,  },
 	{ .name = "movups",	.ops = &mov_ops,  },
 	{ .name = "movzb",	.ops = &mov_ops,  },
-	{ .name = "movzw",	.ops = &mov_ops,  },
 	{ .name = "movzl",	.ops = &mov_ops,  },
+	{ .name = "movzw",	.ops = &mov_ops,  },
 	{ .name = "mulsd",	.ops = &mov_ops,  },
 	{ .name = "mulss",	.ops = &mov_ops,  },
 	{ .name = "nop",	.ops = &nop_ops,  },
 	{ .name = "or",		.ops = &mov_ops,  },
 	{ .name = "orps",	.ops = &mov_ops,  },
-	{ .name = "pand",	.ops = &mov_ops,  },
 	{ .name = "paddq",	.ops = &mov_ops,  },
+	{ .name = "pand",	.ops = &mov_ops,  },
 	{ .name = "pcmpeqb",	.ops = &mov_ops,  },
 	{ .name = "por",	.ops = &mov_ops,  },
 	{ .name = "rcl",	.ops = &mov_ops,  },
@@ -202,6 +202,20 @@ static int x86__annotate_init(struct arch *arch, char *cpuid)
 		if (x86__cpuid_parse(arch, cpuid))
 			err = SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_CPUID_PARSING;
 	}
+
+#ifndef NDEBUG
+	{
+		static bool sorted_check;
+
+		if (!sorted_check) {
+			for (size_t i = 0; i < arch->nr_instructions - 1; i++) {
+				assert(strcmp(arch->instructions[i].name,
+					      arch->instructions[i + 1].name) <= 0);
+			}
+			sorted_check = true;
+		}
+	}
+#endif
 	arch->e_machine = EM_X86_64;
 	arch->e_flags = 0;
 	arch->initialized = true;
diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c
index 9bc9b1de98db..2793697ce75c 100644
--- a/tools/perf/util/disasm.c
+++ b/tools/perf/util/disasm.c
@@ -43,9 +43,9 @@ static const struct ins_ops ret_ops;
 static const struct ins_ops load_store_ops;
 static const struct ins_ops arithmetic_ops;
 
-static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
+static int jump__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name);
-static int call__scnprintf(struct ins *ins, char *bf, size_t size,
+static int call__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name);
 
 static void ins__sort(struct arch *arch);
@@ -66,7 +66,8 @@ static int arch__grow_instructions(struct arch *arch)
 		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));
+	new_instructions = realloc((void *)arch->instructions,
+				   new_nr_allocated * sizeof(struct ins));
 	if (new_instructions == NULL)
 		return -1;
 
@@ -93,7 +94,7 @@ static int arch__associate_ins_ops(struct arch *arch, const char *name, const st
 	    arch__grow_instructions(arch))
 		return -1;
 
-	ins = &arch->instructions[arch->nr_instructions];
+	ins = (struct ins *)&arch->instructions[arch->nr_instructions];
 	ins->name = strdup(name);
 	if (!ins->name)
 		return -1;
@@ -146,6 +147,7 @@ static struct arch architectures[] = {
 		.init = x86__annotate_init,
 		.instructions = x86__instructions,
 		.nr_instructions = ARRAY_SIZE(x86__instructions),
+		.sorted_instructions = true,
 		.insn_suffix = "bwlq",
 		.objdump =  {
 			.comment_char = '#',
@@ -241,13 +243,13 @@ static void ins_ops__delete(struct ins_operands *ops)
 	zfree(&ops->target.name);
 }
 
-static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
+static int ins__raw_scnprintf(const struct ins *ins, char *bf, size_t size,
 			      struct ins_operands *ops, int max_ins_name)
 {
 	return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name, ops->raw);
 }
 
-static int ins__scnprintf(struct ins *ins, char *bf, size_t size,
+static int ins__scnprintf(const struct ins *ins, char *bf, size_t size,
 			  struct ins_operands *ops, int max_ins_name)
 {
 	if (ins->ops->scnprintf)
@@ -319,7 +321,7 @@ indirect_call:
 	goto find_target;
 }
 
-static int call__scnprintf(struct ins *ins, char *bf, size_t size,
+static int call__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name)
 {
 	if (ops->target.sym)
@@ -446,7 +448,7 @@ static int jump__parse(const struct arch *arch, struct ins_operands *ops, struct
 	return 0;
 }
 
-static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
+static int jump__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name)
 {
 	const char *c;
@@ -551,7 +553,7 @@ out_free_ops:
 	return 0;
 }
 
-static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
+static int lock__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name)
 {
 	int printed;
@@ -680,7 +682,7 @@ out_free_source:
 	return -1;
 }
 
-static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
+static int mov__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name)
 {
 	return scnprintf(bf, size, "%-*s %s,%s", max_ins_name, ins->name,
@@ -699,7 +701,7 @@ static const struct ins_ops mov_ops = {
 #define	ADD_ZERO_EXT_XO_FORM	202
 #define	SUB_ZERO_EXT_XO_FORM	200
 
-static int arithmetic__scnprintf(struct ins *ins, char *bf, size_t size,
+static int arithmetic__scnprintf(const struct ins *ins, char *bf, size_t size,
 		struct ins_operands *ops, int max_ins_name)
 {
 	return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name,
@@ -743,7 +745,7 @@ static const struct ins_ops arithmetic_ops = {
 	.scnprintf = arithmetic__scnprintf,
 };
 
-static int load_store__scnprintf(struct ins *ins, char *bf, size_t size,
+static int load_store__scnprintf(const struct ins *ins, char *bf, size_t size,
 		struct ins_operands *ops, int max_ins_name)
 {
 	return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name,
@@ -806,7 +808,7 @@ static int dec__parse(const struct arch *arch __maybe_unused, struct ins_operand
 	return 0;
 }
 
-static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
+static int dec__scnprintf(const struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops, int max_ins_name)
 {
 	return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name,
@@ -818,7 +820,7 @@ static const struct ins_ops dec_ops = {
 	.scnprintf = dec__scnprintf,
 };
 
-static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
+static int nop__scnprintf(const struct ins *ins __maybe_unused, char *bf, size_t size,
 			  struct ins_operands *ops __maybe_unused, int max_ins_name)
 {
 	return scnprintf(bf, size, "%-*s", max_ins_name, "nop");
@@ -866,7 +868,7 @@ static void ins__sort(struct arch *arch)
 {
 	const int nmemb = arch->nr_instructions;
 
-	qsort(arch->instructions, nmemb, sizeof(struct ins), ins__cmp);
+	qsort((void *)arch->instructions, nmemb, sizeof(struct ins), ins__cmp);
 }
 
 static const struct ins_ops *__ins__find(const struct arch *arch, const char *name,
diff --git a/tools/perf/util/disasm.h b/tools/perf/util/disasm.h
index dc5233f2a773..4f5c9a985786 100644
--- a/tools/perf/util/disasm.h
+++ b/tools/perf/util/disasm.h
@@ -19,7 +19,7 @@ struct disasm_line;
 
 struct arch {
 	const char	*name;
-	struct ins	*instructions;
+	const struct ins	*instructions;
 	size_t		nr_instructions;
 	size_t		nr_instructions_allocated;
 	const struct ins_ops  *(*associate_instruction_ops)(struct arch *arch, const char *name);
@@ -91,7 +91,7 @@ struct ins_ops {
 	void (*free)(struct ins_operands *ops);
 	int (*parse)(const struct arch *arch, struct ins_operands *ops, struct map_symbol *ms,
 			struct disasm_line *dl);
-	int (*scnprintf)(struct ins *ins, char *bf, size_t size,
+	int (*scnprintf)(const struct ins *ins, char *bf, size_t size,
 			 struct ins_operands *ops, int max_ins_name);
 };