Add enable_on_exec test

CHANGES

@@ -1,3 +1,6 @@
+9 August 2012
++ Add enable_on_exec test
+
 7 August 2012
 + Add breakpoint test
 + Add some inherit tests

run_tests.sh

@@ -28,6 +28,7 @@ echo "* Checking basic perf_event functionality"
 ./validation/breakpoint_support
 ./validation/inherit
 ./validation/inherit_stat
+./validation/enable_on_exec
 
 echo
 echo "* Checking bugs that PAPI has to work around"

validation/Makefile

@@ -5,6 +5,7 @@ LFLAGS =
 all:	\
 	breakpoint_support \
 	check_constraints \
+	enable_on_exec \
 	format_id_support \
 	get_cache_info \
 	inherit \
@@ -121,6 +122,19 @@ non-existent:	non-existent.o ../lib/test_utils.o \
 non-existent.o:	non-existent.c
 	$(CC) $(CFLAGS) -c non-existent.c
 
+###
+
+enable_on_exec:	enable_on_exec.o ../lib/test_utils.o \
+					../lib/perf_helpers.o \
+					../lib/instructions_testcode.o
+	$(CC) $(LFLAGS) -o enable_on_exec enable_on_exec.o \
+				../lib/test_utils.o \
+				../lib/perf_helpers.o \
+				../lib/instructions_testcode.o
+
+enable_on_exec.o:	enable_on_exec.c
+	$(CC) $(CFLAGS) -c enable_on_exec.c
+
 
 ###                                                                            
 
@@ -193,6 +207,7 @@ clean:
 	rm -f *~ *.o \
 	breakpoint_support \
 	check_constraints \
+	enable_on_exec \
 	format_id_support \
 	get_cache_info \
 	inherit \

validation/enable_on_exec.c

@@ -0,0 +1,143 @@
+/* enable_on_exec.c  */
+/* by Vince Weaver   vweaver1 _at_ eecs.utk.edu */
+
+/* Test if the enable_on_exec flag works */
+
+#define _GNU_SOURCE 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <sys/ioctl.h>
+
+
+#include "perf_event.h"
+#include "test_utils.h"
+#include "perf_helpers.h"
+#include "instructions_testcode.h"
+
+
+int main(int argc, char** argv) {
+
+   int fd,ret,quiet;
+   int result;
+   int read_result;
+   long long count;
+
+   struct perf_event_attr pe;
+
+   char test_string[]="Testing enable_on_exec...";
+
+   char fd_string[BUFSIZ];
+
+   quiet=test_quiet();
+
+   /* Firxt exec, without enable_on_exec */
+   if (argc==2) {
+
+      fd=atoi(argv[1]);
+
+      if (!quiet) {
+	 printf("\tWe've been exec'd without enable_on_exec, fd=%d!\n",fd);
+      }
+
+      result=instructions_million();
+      if (result==CODE_UNIMPLEMENTED) printf("Warning, no million\n");
+
+      read_result=read(fd,&count,sizeof(long long));
+      if (read_result!=sizeof(long long)) printf("Unexpected read size\n");
+
+      if (!quiet) printf("\tCounted %lld instructions\n",count);
+
+      close(fd);
+
+      memset(&pe,0,sizeof(struct perf_event_attr));
+
+      pe.type=PERF_TYPE_HARDWARE;
+      pe.size=sizeof(struct perf_event_attr);
+      pe.config=PERF_COUNT_HW_INSTRUCTIONS;
+      pe.disabled=1;
+      pe.exclude_kernel=1;
+      pe.enable_on_exec=1;
+
+      fd=perf_event_open(&pe,0,-1,-1,0);
+      if (fd<0) {
+         fprintf(stderr,"Error opening\n");
+         test_fail(test_string);
+         exit(1);
+      }
+
+      if (count!=0) test_fail(test_string);
+
+      sprintf(fd_string,"%d",fd);
+
+      /* exec ourselves, but with two arguments to change behavior */
+      execl(argv[0],argv[0],fd_string,fd_string,NULL);
+
+   }
+
+
+   /* Second exec, with enable_on_exec */
+   if (argc==3) {
+
+      fd=atoi(argv[1]);
+
+      if (!quiet) {
+	 printf("\tWe've been exec'd with enable_on_exec, fd=%d!\n",fd);
+      }
+
+      result=instructions_million();
+      if (result==CODE_UNIMPLEMENTED) printf("Warning, no million\n");
+
+      read_result=read(fd,&count,sizeof(long long));
+      if (read_result!=sizeof(long long)) printf("Unexpected read size\n");
+
+      if (!quiet) printf("\tCounted %lld instructions\n",count);
+
+      close(fd);
+
+      if (count==0) test_fail(test_string);
+
+      test_pass(test_string);
+
+      return 0;
+
+   }
+
+
+   if (!quiet) {
+      printf("Testing if enable_on_exec works as expected.\n");
+   }
+
+   /* setup perf-event */
+
+   memset(&pe,0,sizeof(struct perf_event_attr));
+
+   pe.type=PERF_TYPE_HARDWARE;
+   pe.size=sizeof(struct perf_event_attr);
+   pe.config=PERF_COUNT_HW_INSTRUCTIONS;
+   pe.disabled=1;
+   pe.exclude_kernel=1;
+   pe.enable_on_exec=0;
+
+   fd=perf_event_open(&pe,0,-1,-1,0);
+   if (fd<0) {
+      fprintf(stderr,"Error opening\n");
+      test_fail(test_string);
+      exit(1);
+   }
+
+   sprintf(fd_string,"%d",fd);
+
+
+   /* exec ourselves, but with an argument to change behavior */
+   execl(argv[0],argv[0],fd_string,NULL);
+
+   (void) ret;
+
+   return 0;
+}