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Diffstat (limited to 'third_party/git/compat/win32/trace2_win32_process_info.c')
-rw-r--r--third_party/git/compat/win32/trace2_win32_process_info.c191
1 files changed, 0 insertions, 191 deletions
diff --git a/third_party/git/compat/win32/trace2_win32_process_info.c b/third_party/git/compat/win32/trace2_win32_process_info.c
deleted file mode 100644
index 8ccbd1c2c6f8..000000000000
--- a/third_party/git/compat/win32/trace2_win32_process_info.c
+++ /dev/null
@@ -1,191 +0,0 @@
-#include "../../cache.h"
-#include "../../json-writer.h"
-#include "lazyload.h"
-#include <Psapi.h>
-#include <tlHelp32.h>
-
-/*
- * An arbitrarily chosen value to limit the size of the ancestor
- * array built in git_processes().
- */
-#define NR_PIDS_LIMIT 10
-
-/*
- * Find the process data for the given PID in the given snapshot
- * and update the PROCESSENTRY32 data.
- */
-static int find_pid(DWORD pid, HANDLE hSnapshot, PROCESSENTRY32 *pe32)
-{
-	pe32->dwSize = sizeof(PROCESSENTRY32);
-
-	if (Process32First(hSnapshot, pe32)) {
-		do {
-			if (pe32->th32ProcessID == pid)
-				return 1;
-		} while (Process32Next(hSnapshot, pe32));
-	}
-	return 0;
-}
-
-/*
- * Accumulate JSON array of our parent processes:
- *     [
- *         exe-name-parent,
- *         exe-name-grand-parent,
- *         ...
- *     ]
- *
- * Note: we only report the filename of the process executable; the
- *       only way to get its full pathname is to use OpenProcess()
- *       and GetModuleFileNameEx() or QueryfullProcessImageName()
- *       and that seems rather expensive (on top of the cost of
- *       getting the snapshot).
- *
- * Note: we compute the set of parent processes by walking the PPID
- *       link in each visited PROCESSENTRY32 record.  This search
- *       stops when an ancestor process is not found in the snapshot
- *       (because it exited before the current or intermediate parent
- *       process exited).
- *
- *       This search may compute an incorrect result if the PPID link
- *       refers to the PID of an exited parent and that PID has been
- *       recycled and given to a new unrelated process.
- *
- *       Worse, it is possible for a child or descendant of the
- *       current process to be given the recycled PID and cause a
- *       PPID-cycle.  This would cause an infinite loop building our
- *       parent process array.
- *
- * Note: for completeness, the "System Idle" process has PID=0 and
- *       PPID=0 and could cause another PPID-cycle.  We don't expect
- *       Git to be a descendant of the idle process, but because of
- *       PID recycling, it might be possible to get a PPID link value
- *       of 0.  This too would cause an infinite loop.
- *
- * Therefore, we keep an array of the visited PPIDs to guard against
- * cycles.
- *
- * We use a fixed-size array rather than ALLOC_GROW to keep things
- * simple and avoid the alloc/realloc overhead.  It is OK if we
- * truncate the search and return a partial answer.
- */
-static void get_processes(struct json_writer *jw, HANDLE hSnapshot)
-{
-	PROCESSENTRY32 pe32;
-	DWORD pid;
-	DWORD pid_list[NR_PIDS_LIMIT];
-	int k, nr_pids = 0;
-
-	pid = GetCurrentProcessId();
-	while (find_pid(pid, hSnapshot, &pe32)) {
-		/* Only report parents. Omit self from the JSON output. */
-		if (nr_pids)
-			jw_array_string(jw, pe32.szExeFile);
-
-		/* Check for cycle in snapshot. (Yes, it happened.) */
-		for (k = 0; k < nr_pids; k++)
-			if (pid == pid_list[k]) {
-				jw_array_string(jw, "(cycle)");
-				return;
-			}
-
-		if (nr_pids == NR_PIDS_LIMIT) {
-			jw_array_string(jw, "(truncated)");
-			return;
-		}
-
-		pid_list[nr_pids++] = pid;
-
-		pid = pe32.th32ParentProcessID;
-	}
-}
-
-/*
- * Emit JSON data for the current and parent processes.  Individual
- * trace2 targets can decide how to actually print it.
- */
-static void get_ancestry(void)
-{
-	HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
-
-	if (hSnapshot != INVALID_HANDLE_VALUE) {
-		struct json_writer jw = JSON_WRITER_INIT;
-
-		jw_array_begin(&jw, 0);
-		get_processes(&jw, hSnapshot);
-		jw_end(&jw);
-
-		trace2_data_json("process", the_repository, "windows/ancestry",
-				 &jw);
-
-		jw_release(&jw);
-		CloseHandle(hSnapshot);
-	}
-}
-
-/*
- * Is a debugger attached to the current process?
- *
- * This will catch debug runs (where the debugger started the process).
- * This is the normal case.  Since this code is called during our startup,
- * it will not report instances where a debugger is attached dynamically
- * to a running git process, but that is relatively rare.
- */
-static void get_is_being_debugged(void)
-{
-	if (IsDebuggerPresent())
-		trace2_data_intmax("process", the_repository,
-				   "windows/debugger_present", 1);
-}
-
-/*
- * Emit JSON data with the peak memory usage of the current process.
- */
-static void get_peak_memory_info(void)
-{
-	DECLARE_PROC_ADDR(psapi.dll, BOOL, GetProcessMemoryInfo, HANDLE,
-			  PPROCESS_MEMORY_COUNTERS, DWORD);
-
-	if (INIT_PROC_ADDR(GetProcessMemoryInfo)) {
-		PROCESS_MEMORY_COUNTERS pmc;
-
-		if (GetProcessMemoryInfo(GetCurrentProcess(), &pmc,
-					 sizeof(pmc))) {
-			struct json_writer jw = JSON_WRITER_INIT;
-
-			jw_object_begin(&jw, 0);
-
-#define KV(kv) #kv, (intmax_t)pmc.kv
-
-			jw_object_intmax(&jw, KV(PageFaultCount));
-			jw_object_intmax(&jw, KV(PeakWorkingSetSize));
-			jw_object_intmax(&jw, KV(PeakPagefileUsage));
-
-			jw_end(&jw);
-
-			trace2_data_json("process", the_repository,
-					 "windows/memory", &jw);
-			jw_release(&jw);
-		}
-	}
-}
-
-void trace2_collect_process_info(enum trace2_process_info_reason reason)
-{
-	if (!trace2_is_enabled())
-		return;
-
-	switch (reason) {
-	case TRACE2_PROCESS_INFO_STARTUP:
-		get_is_being_debugged();
-		get_ancestry();
-		return;
-
-	case TRACE2_PROCESS_INFO_EXIT:
-		get_peak_memory_info();
-		return;
-
-	default:
-		BUG("trace2_collect_process_info: unknown reason '%d'", reason);
-	}
-}