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Squashed 'third_party/git/' content from commit cb71568594

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git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7
This commit is contained in:
Vincent Ambo 2020-01-11 23:36:56 +00:00
commit 1b593e1ea4
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t/helper/test-trace2.c Normal file
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#include "test-tool.h"
#include "cache.h"
#include "argv-array.h"
#include "run-command.h"
#include "exec-cmd.h"
#include "config.h"
typedef int(fn_unit_test)(int argc, const char **argv);
struct unit_test {
fn_unit_test *ut_fn;
const char *ut_name;
const char *ut_usage;
};
#define MyOk 0
#define MyError 1
static int get_i(int *p_value, const char *data)
{
char *endptr;
if (!data || !*data)
return MyError;
*p_value = strtol(data, &endptr, 10);
if (*endptr || errno == ERANGE)
return MyError;
return MyOk;
}
/*
* Cause process to exit with the requested value via "return".
*
* Rely on test-tool.c:cmd_main() to call trace2_cmd_exit()
* with our result.
*
* Test harness can confirm:
* [] the process-exit value.
* [] the "code" field in the "exit" trace2 event.
* [] the "code" field in the "atexit" trace2 event.
* [] the "name" field in the "cmd_name" trace2 event.
* [] "def_param" events for all of the "interesting" pre-defined
* config settings.
*/
static int ut_001return(int argc, const char **argv)
{
int rc;
if (get_i(&rc, argv[0]))
die("expect <exit_code>");
return rc;
}
/*
* Cause the process to exit with the requested value via "exit()".
*
* Test harness can confirm:
* [] the "code" field in the "exit" trace2 event.
* [] the "code" field in the "atexit" trace2 event.
* [] the "name" field in the "cmd_name" trace2 event.
* [] "def_param" events for all of the "interesting" pre-defined
* config settings.
*/
static int ut_002exit(int argc, const char **argv)
{
int rc;
if (get_i(&rc, argv[0]))
die("expect <exit_code>");
exit(rc);
}
/*
* Send an "error" event with each value in argv. Normally, git only issues
* a single "error" event immediately before issuing an "exit" event (such
* as in die() or BUG()), but multiple "error" events are allowed.
*
* Test harness can confirm:
* [] a trace2 "error" event for each value in argv.
* [] the "name" field in the "cmd_name" trace2 event.
* [] (optional) the file:line in the "exit" event refers to this function.
*/
static int ut_003error(int argc, const char **argv)
{
int k;
if (!argv[0] || !*argv[0])
die("expect <error_message>");
for (k = 0; k < argc; k++)
error("%s", argv[k]);
return 0;
}
/*
* Run a child process and wait for it to finish and exit with its return code.
* test-tool trace2 004child [<child-command-line>]
*
* For example:
* test-tool trace2 004child git version
* test-tool trace2 004child test-tool trace2 001return 0
* test-tool trace2 004child test-tool trace2 004child test-tool trace2 004child
* test-tool trace2 004child git -c alias.xyz=version xyz
*
* Test harness can confirm:
* [] the "name" field in the "cmd_name" trace2 event.
* [] that the outer process has a single component SID (or depth "d0" in
* the PERF stream).
* [] that "child_start" and "child_exit" events are generated for the child.
* [] if the child process is an instrumented executable:
* [] that "version", "start", ..., "exit", and "atexit" events are
* generated by the child process.
* [] that the child process events have a multiple component SID (or
* depth "dN+1" in the PERF stream).
* [] that the child exit code is propagated to the parent process "exit"
* and "atexit" events..
* [] (optional) that the "t_abs" field in the child process "atexit" event
* is less than the "t_rel" field in the "child_exit" event of the parent
* process.
* [] if the child process is like the alias example above,
* [] (optional) the child process attempts to run "git-xyx" as a dashed
* command.
* [] the child process emits an "alias" event with "xyz" => "version"
* [] the child process runs "git version" as a child process.
* [] the child process has a 3 component SID (or depth "d2" in the PERF
* stream).
*/
static int ut_004child(int argc, const char **argv)
{
int result;
/*
* Allow empty <child_command_line> so we can do arbitrarily deep
* command nesting and let the last one be null.
*/
if (!argc)
return 0;
result = run_command_v_opt(argv, 0);
exit(result);
}
/*
* Exec a git command. This may either create a child process (Windows)
* or replace the existing process.
* test-tool trace2 005exec <git_command_args>
*
* For example:
* test-tool trace2 005exec version
*
* Test harness can confirm (on Windows):
* [] the "name" field in the "cmd_name" trace2 event.
* [] that the outer process has a single component SID (or depth "d0" in
* the PERF stream).
* [] that "exec" and "exec_result" events are generated for the child
* process (since the Windows compatibility layer fakes an exec() with
* a CreateProcess(), WaitForSingleObject(), and exit()).
* [] that the child process has multiple component SID (or depth "dN+1"
* in the PERF stream).
*
* Test harness can confirm (on platforms with a real exec() function):
* [] TODO talk about process replacement and how it affects SID.
*/
static int ut_005exec(int argc, const char **argv)
{
int result;
if (!argc)
return 0;
result = execv_git_cmd(argv);
return result;
}
static int ut_006data(int argc, const char **argv)
{
const char *usage_error =
"expect <cat0> <k0> <v0> [<cat1> <k1> <v1> [...]]";
if (argc % 3 != 0)
die("%s", usage_error);
while (argc) {
if (!argv[0] || !*argv[0] || !argv[1] || !*argv[1] ||
!argv[2] || !*argv[2])
die("%s", usage_error);
trace2_data_string(argv[0], the_repository, argv[1], argv[2]);
argv += 3;
argc -= 3;
}
return 0;
}
/*
* Usage:
* test-tool trace2 <ut_name_1> <ut_usage_1>
* test-tool trace2 <ut_name_2> <ut_usage_2>
* ...
*/
#define USAGE_PREFIX "test-tool trace2"
/* clang-format off */
static struct unit_test ut_table[] = {
{ ut_001return, "001return", "<exit_code>" },
{ ut_002exit, "002exit", "<exit_code>" },
{ ut_003error, "003error", "<error_message>+" },
{ ut_004child, "004child", "[<child_command_line>]" },
{ ut_005exec, "005exec", "<git_command_args>" },
{ ut_006data, "006data", "[<category> <key> <value>]+" },
};
/* clang-format on */
/* clang-format off */
#define for_each_ut(k, ut_k) \
for (k = 0, ut_k = &ut_table[k]; \
k < ARRAY_SIZE(ut_table); \
k++, ut_k = &ut_table[k])
/* clang-format on */
static int print_usage(void)
{
int k;
struct unit_test *ut_k;
fprintf(stderr, "usage:\n");
for_each_ut (k, ut_k)
fprintf(stderr, "\t%s %s %s\n", USAGE_PREFIX, ut_k->ut_name,
ut_k->ut_usage);
return 129;
}
/*
* Issue various trace2 events for testing.
*
* We assume that these trace2 routines has already been called:
* [] trace2_initialize() [common-main.c:main()]
* [] trace2_cmd_start() [common-main.c:main()]
* [] trace2_cmd_name() [test-tool.c:cmd_main()]
* [] tracd2_cmd_list_config() [test-tool.c:cmd_main()]
* So that:
* [] the various trace2 streams are open.
* [] the process SID has been created.
* [] the "version" event has been generated.
* [] the "start" event has been generated.
* [] the "cmd_name" event has been generated.
* [] this writes various "def_param" events for interesting config values.
*
* We further assume that if we return (rather than exit()), trace2_cmd_exit()
* will be called by test-tool.c:cmd_main().
*/
int cmd__trace2(int argc, const char **argv)
{
int k;
struct unit_test *ut_k;
argc--; /* skip over "trace2" arg */
argv++;
if (argc)
for_each_ut (k, ut_k)
if (!strcmp(argv[0], ut_k->ut_name))
return ut_k->ut_fn(argc - 1, argv + 1);
return print_usage();
}