Merged the MASSIF2 branch to the trunk. Main changes:
- ms_main.c: completely overhauled.
- massif/tests/*: lots of them now.
- massif/perf/: added.
- massif/hp2ps: removed. No longer used.
- vg_regtest: renamed the previously unused "posttest" notion to "post".
Using it for checking ms_print's output.
Although the code has changed dramatically, as has the form of the tool's
output, the information presented in the output is basically the same,
although it's now (hopefully) much more useful. So the tool name is
unchanged.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7069 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/massif/perf/many-xpts.c b/massif/perf/many-xpts.c
new file mode 100644
index 0000000..e5e3e86
--- /dev/null
+++ b/massif/perf/many-xpts.c
@@ -0,0 +1,52 @@
+#include <stdlib.h>
+
+#define nth_bit(x, n) ((x >> n) & 1)
+#define Fn(N, Np1) \
+ void* a##N(int x) { return ( nth_bit(x, N) ? a##Np1(x) : a##Np1(x) ); }
+
+// This test allocates a lot of heap memory, and every allocation features a
+// different stack trace -- the stack traces are effectively a
+// representation of the number 'i', where each function represents a bit in
+// 'i', and if it's a 1 the first function is called, and if it's a 0 the
+// second function is called.
+
+void* a999(int x)
+{
+ return malloc(100);
+}
+
+Fn(17, 999)
+Fn(16, 17)
+Fn(15, 16)
+Fn(14, 15)
+Fn(13, 14)
+Fn(12, 13)
+Fn(11, 12)
+Fn(10, 11)
+Fn( 9, 10)
+Fn( 8, 9)
+Fn( 7, 8)
+Fn( 6, 7)
+Fn( 5, 6)
+Fn( 4, 5)
+Fn( 3, 4)
+Fn( 2, 3)
+Fn( 1, 2)
+Fn( 0, 1)
+
+int main(void)
+{
+ int i;
+
+ // Create a large XTree.
+ for (i = 0; i < (1 << 18); i++)
+ a0(i);
+
+ // Do a lot of allocations so it gets dup'd a lot of times.
+ for (i = 0; i < 100000; i++) {
+ free(a1(234));
+ free(a2(111));
+ }
+
+ return 0;
+}