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authorFlorian Fischer <florian.fl.fischer@fau.de>2019-08-11 22:28:38 +0200
committerFlorian Fischer <florian.fl.fischer@fau.de>2019-08-11 22:40:06 +0200
commit9d056ff64bf887e2c3479fe515bf7c95cb39e5b6 (patch)
treed9c2d9819e9b0a175721562db546fbc25f3ca54f /src/run_cmd.c
parentf7d64e02af941515bc894dea10f55255d06cbcf7 (diff)
downloadallocbench-9d056ff64bf887e2c3479fe515bf7c95cb39e5b6.tar.gz
allocbench-9d056ff64bf887e2c3479fe515bf7c95cb39e5b6.zip
Rework exec chain
Originally the structure of the executed cmd was {measure cmd} {allocator cmd prefix} {cmd} with the parent environment except LD_PRELOAD was modified for the whole command chain. Unfortunatly perf causes segfaults with some allocators and measuring allocators cmd prefixes doesnt seem fair. So the new cmd chain looks like: {allocator cmd prefix} {measure cmd} run_cmd <LD_PRELOAD> {cmd} without touching the environment in python. run_cmd sets LD_PRELOAD to the value it received in argv[1] and executes argv[2] with the rest of argv. This does also measure code not part of the actual benchmark but in a equal manner and not only for some allocators.
Diffstat (limited to 'src/run_cmd.c')
-rw-r--r--src/run_cmd.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/run_cmd.c b/src/run_cmd.c
new file mode 100644
index 0000000..aa15964
--- /dev/null
+++ b/src/run_cmd.c
@@ -0,0 +1,18 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char* argv[]) {
+ if (argc < 3) {
+ printf("Usage: %s <ld_preload> <cmd> [cmd args]\n");
+ printf("\tset LD_PRELOAD to ld_preload and call execvp <cmd> [cmd args]\n");
+ return 1;
+ }
+
+ // Overwrite LD_PRELOAD.
+ setenv("LD_PRELOAD", argv[1], 1);
+
+ // Run cmd.
+ execvp(argv[2], &argv[2]);
+}