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tools/perf: Convert to insn_decode()

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Simplify code, no functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lkml.kernel.org/r/20210304174237.31945-20-bp@alien8.de
This commit is contained in:
Borislav Petkov 2020-11-23 23:00:16 +01:00
parent a277ce601c
commit 62660b0fd2
3 changed files with 19 additions and 16 deletions
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9
tools/perf/arch/x86/tests/insn-x86.c
View File

@ -96,13 +96,12 @@ static int get_branch(const char *branch_str)
static int test_data_item(struct test_data *dat, int x86_64)
{
struct intel_pt_insn intel_pt_insn;
int op, branch, ret;
struct insn insn;
int op, branch;
insn_init(&insn, dat->data, MAX_INSN_SIZE, x86_64);
insn_get_length(&insn);
if (!insn_complete(&insn)) {
ret = insn_decode(&insn, dat->data, MAX_INSN_SIZE,
x86_64 ? INSN_MODE_64 : INSN_MODE_32);
if (ret < 0) {
pr_debug("Failed to decode: %s\n", dat->asm_rep);
return -1;
}

9
tools/perf/arch/x86/util/archinsn.c
View File

@ -11,7 +11,7 @@ void arch_fetch_insn(struct perf_sample *sample,
struct machine *machine)
{
struct insn insn;
int len;
int len, ret;
bool is64bit = false;
if (!sample->ip)
@ -19,8 +19,9 @@ void arch_fetch_insn(struct perf_sample *sample,
len = thread__memcpy(thread, machine, sample->insn, sample->ip, sizeof(sample->insn), &is64bit);
if (len <= 0)
return;
insn_init(&insn, sample->insn, len, is64bit);
insn_get_length(&insn);
if (insn_complete(&insn) && insn.length <= len)
ret = insn_decode(&insn, sample->insn, len,
is64bit ? INSN_MODE_64 : INSN_MODE_32);
if (ret >= 0 && insn.length <= len)
sample->insn_len = insn.length;
}

17
tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
View File

@ -169,11 +169,13 @@ int intel_pt_get_insn(const unsigned char *buf, size_t len, int x86_64,
struct intel_pt_insn *intel_pt_insn)
{
struct insn insn;
int ret;
insn_init(&insn, buf, len, x86_64);
insn_get_length(&insn);
if (!insn_complete(&insn) || insn.length > len)
ret = insn_decode(&insn, buf, len,
x86_64 ? INSN_MODE_64 : INSN_MODE_32);
if (ret < 0 || insn.length > len)
return -1;
intel_pt_insn_decoder(&insn, intel_pt_insn);
if (insn.length < INTEL_PT_INSN_BUF_SZ)
memcpy(intel_pt_insn->buf, buf, insn.length);
@ -194,12 +196,13 @@ const char *dump_insn(struct perf_insn *x, uint64_t ip __maybe_unused,
u8 *inbuf, int inlen, int *lenp)
{
struct insn insn;
int n, i;
int n, i, ret;
int left;
insn_init(&insn, inbuf, inlen, x->is64bit);
insn_get_length(&insn);
if (!insn_complete(&insn) || insn.length > inlen)
ret = insn_decode(&insn, inbuf, inlen,
x->is64bit ? INSN_MODE_64 : INSN_MODE_32);
if (ret < 0 || insn.length > inlen)
return "<bad>";
if (lenp)
*lenp = insn.length;