Move memcheck/tests/brk to the linux/ subdir, as it's Linux-specific (merged

from the DARWIN branch).  Also filter the output more so the .stderr.exp2
isn't needed.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@9038

memcheck/tests/linux/Makefile.am

@@ -1,10 +1,12 @@
 noinst_SCRIPTS = filter_stderr
 
 EXTRA_DIST = $(noinst_SCRIPTS) \
+	brk.stderr.exp brk.vgtest \
 	capget capget.stderr.exp \
 	timerfd-syscall timerfd-syscall.stderr.exp
 
 check_PROGRAMS = \
+	brk \
 	capget \
 	timerfd-syscall
 

memcheck/tests/linux/brk.c

@@ -0,0 +1,44 @@
+#include <assert.h>
+#include <stdio.h>
+#if !defined(_AIX)
+# include <sys/syscall.h>
+#endif
+#include <sys/types.h>
+#include <unistd.h>
+
+// kernel brk() and libc brk() act quite differently...
+
+int main(void)
+{
+   int i;
+   void* orig_ds = sbrk(0);
+   void* ds = orig_ds;
+   void* vals[10];
+   void* res;
+#define EOL ((void*)( ~(long)0 ))
+   vals[0] = (void*)0;
+   vals[1] = (void*)1;
+   vals[2] = ds - 0x1;          // small shrink
+   vals[3] = ds;
+   vals[4] = ds + 0x1000;       // small growth
+   vals[5] = ds + 0x40000000;   // too-big growth
+   vals[6] = ds + 0x500;        // shrink a little, but still above start size
+   vals[7] = ds - 0x1;          // shrink below start size
+//   vals[8] = ds - 0x1000;       // shrink a lot below start size (into text)
+//   vals[9] = EOL;
+   vals[8] = EOL;
+
+   for (i = 0; EOL != vals[i]; i++) {
+#     if !defined(_AIX)
+      res = (void*)syscall(__NR_brk, vals[i]);
+#     endif
+   }
+
+   assert( 0 == brk(orig_ds) );  // libc brk()
+
+   for (i = 0; EOL != vals[i]; i++) {
+      res = (void*)(long)brk(vals[i]);
+   }
+
+   return 0;
+}

memcheck/tests/linux/brk.stderr.exp

@@ -0,0 +1,7 @@
+
+
+ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
+malloc/free: in use at exit: ... bytes in ... blocks.
+malloc/free: ... allocs, ... frees, ... bytes allocated.
+For a detailed leak analysis,  rerun with: --leak-check=yes
+For counts of detected errors, rerun with: -v

memcheck/tests/linux/brk.vgtest

@@ -0,0 +1,2 @@
+prog: brk
+stderr_filter: ../filter_allocs