[darwinbuild-changes] [40] trunk

[source_changes at macosforge.org]

Revision: 40
          http://trac.macosforge.org/projects/darwinbuild/changeset/40
Author:   kevin
Date:     2006-10-04 01:40:28 -0700 (Wed, 04 Oct 2006)

Log Message:
-----------
- added darwintrace library

Added Paths:
-----------
    trunk/darwintrace/
    trunk/darwintrace/Makefile
    trunk/darwintrace/darwintrace.c

Added: trunk/darwintrace/Makefile
===================================================================
--- trunk/darwintrace/Makefile	                        (rev 0)
+++ trunk/darwintrace/Makefile	2006-10-04 08:40:28 UTC (rev 40)
@@ -0,0 +1,31 @@
+###
+### Variables for the 'install' phase
+###
+PREFIX=/usr/local
+DATDIR=$(PREFIX)/share/darwinbuild
+INSTALL=install
+INSTALL_EXE_FLAGS=-m 0755 -o root -g wheel
+INSTALL_DIR_FLAGS=$(INSTALL_EXE_FLAGS)
+INSTALL_DOC_FLAGS=-m 0644 -o root -g wheel
+
+all: darwintrace.dylib
+
+darwintrace.dylib: darwintrace.c
+	cc -o $@ \
+		-flat_namespace \
+		-fno-common \
+		-nostdlib \
+		-undefined suppress \
+		-dynamiclib \
+		$^
+clean:
+	rm -f darwintrace.dylib
+
+install: all
+	[ -d $(DATDIR) ] || \
+		$(INSTALL) -d $(INSTALL_DIR_FLAGS) $(DATDIR)
+	$(INSTALL) $(INSTALL_DOC_FLAGS) darwintrace.dylib $(DATDIR)
+
+uninstall:
+	rm -f $(DATDIR)/darwintrace.dylib
+	rmdir $(DATDIR)


Property changes on: trunk/darwintrace/Makefile
___________________________________________________________________
Name: svn:eol-style
   + native

Added: trunk/darwintrace/darwintrace.c
===================================================================
--- trunk/darwintrace/darwintrace.c	                        (rev 0)
+++ trunk/darwintrace/darwintrace.c	2006-10-04 08:40:28 UTC (rev 40)
@@ -0,0 +1,69 @@
+#include <crt_externs.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int __darwintrace_fd = -2;
+#define BUFFER_SIZE	1024
+char __darwintrace_buf[BUFFER_SIZE];
+
+// Log calls to open(2) into the file specified by DARWINTRACE_LOG.
+// Only logs if the DARWINTRACE_LOG environment variable is set.
+// Only logs files where the open succeeds.
+// Only logs files opened for read access, without the O_CREAT flag set.
+// The assumption is that any file that can be created isn't necessary
+// to build the project.
+
+int open(const char* path, int flags, ...) {
+// SYS_open 5
+#define open(x,y,z) syscall(5, (x), (y), (z))
+	va_list args;
+	va_start(args, flags);
+	mode_t mode = va_arg(args, int);
+	va_end(args);
+	int result = open(path, flags, mode);
+	if (result >= 0 && (flags & (O_CREAT | O_WRONLY /*O_RDWR*/)) == 0 ) {
+		if (__darwintrace_fd == -2) {
+		  char* path = getenv("DARWINTRACE_LOG");
+		  if (path != NULL) {
+			__darwintrace_fd = open(path,
+			O_CREAT | O_WRONLY | O_APPEND,
+			0666);
+			fcntl(__darwintrace_fd, F_SETFD, 1); // close-on-exec
+		  }
+		}
+		if (__darwintrace_fd >= 0) {
+		  int size = snprintf(__darwintrace_buf, BUFFER_SIZE, "open\t%s\n", path );
+		  write(__darwintrace_fd, __darwintrace_buf, size);
+		  fsync(__darwintrace_fd);
+		}
+	}
+	return result;
+}
+
+int execve(const char* path, char* const argv[], char* const envp[]) {
+// SYS_execve 59
+#define execve(x,y,z) syscall(59, (x), (y), (z))
+	if (__darwintrace_fd == -2) {
+	  char* path = getenv("DARWINTRACE_LOG");
+	  if (path != NULL) {
+		__darwintrace_fd = open(path,
+		O_CREAT | O_WRONLY | O_APPEND,
+		0666);
+		fcntl(__darwintrace_fd, F_SETFD, 1); // close-on-exec
+	  }
+	}
+	if (__darwintrace_fd >= 0) {
+	  struct stat sb;
+	  if (stat(path, &sb) == 0) {
+		int size = snprintf(__darwintrace_buf, BUFFER_SIZE, "execve\t%s\n", path );
+		write(__darwintrace_fd, __darwintrace_buf, size);
+		fsync(__darwintrace_fd);
+	  }
+	}
+	int result = execve(path, argv, envp);
+	return result;
+}


Property changes on: trunk/darwintrace/darwintrace.c
___________________________________________________________________
Name: svn:eol-style
   + native

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