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perf test: Add option to change objdump binary

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All of the other Perf subcommands that use objdump have an option to
specify the binary, so add the same option to 'perf test'.

This is useful if you have built the kernel with a different toolchain
to the system one, where the system objdump may fail to disassemble
vmlinux.

Now this can be fixed with something like this:

  $ perf test --objdump llvm-objdump "object code reading"

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Tom Rix <trix@redhat.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: llvm@lists.linux.dev
Link: https://lore.kernel.org/r/20231106151051.129440-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2023-11-06 15:10:48 +00:00 committed by Arnaldo Carvalho de Melo
parent b861fd7e0e
commit 33ce9fc4f8
3 changed files with 5 additions and 1 deletions
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3
tools/perf/tests/builtin-test.c
View File

@ -32,6 +32,7 @@
static bool dont_fork;
const char *dso_to_test;
const char *test_objdump_path = "objdump";
/*
* List of architecture specific tests. Not a weak symbol as the array length is
@ -529,6 +530,8 @@ int cmd_test(int argc, const char **argv)
"Do not fork for testcase"),
OPT_STRING('w', "workload", &workload, "work", "workload to run for testing"),
OPT_STRING(0, "dso", &dso_to_test, "dso", "dso to test"),
OPT_STRING(0, "objdump", &test_objdump_path, "path",
"objdump binary to use for disassembly and annotations"),
OPT_END()
};
const char * const test_subcommands[] = { "list", NULL };

2
tools/perf/tests/code-reading.c
View File

@ -185,7 +185,7 @@ static int read_via_objdump(const char *filename, u64 addr, void *buf,
int ret;
fmt = "%s -z -d --start-address=0x%"PRIx64" --stop-address=0x%"PRIx64" %s";
ret = snprintf(cmd, sizeof(cmd), fmt, "objdump", addr, addr + len,
ret = snprintf(cmd, sizeof(cmd), fmt, test_objdump_path, addr, addr + len,
filename);
if (ret <= 0 || (size_t)ret >= sizeof(cmd))
return -1;

1
tools/perf/tests/tests.h
View File

@ -207,5 +207,6 @@ DECLARE_WORKLOAD(brstack);
DECLARE_WORKLOAD(datasym);
extern const char *dso_to_test;
extern const char *test_objdump_path;
#endif /* TESTS_H */