uproctrace

add test for forking app
Parent ea6034b
Stefan Schuermans

Stefan Schuermans commited on 2021-03-09 19:21:47
Showing 5 changed files, with 67 additions and 0 deletions.

tests/CMakeLists.txt
View file @ ad0d59b
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@@ -1,3 +1,4 @@
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 add_subdirectory(first)
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+add_subdirectory(fork)
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 add_subdirectory(pylint)
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 add_subdirectory(trace_build)
tests/fork/CMakeLists.txt
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@@ -0,0 +1,11 @@
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+add_executable(
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+  forkapp
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+  forkapp.c
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+)
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+
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+add_test(
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+  NAME
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+  fork
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+  COMMAND
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+  ${CMAKE_CURRENT_SOURCE_DIR}/forktest.bash ${CMAKE_BINARY_DIR}
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+)
tests/fork/forkapp.c
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+#include <stdlib.h>
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+#include <sys/types.h>
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+#include <sys/wait.h>
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+#include <unistd.h>
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+
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+void run(char const *path) {
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+  pid_t child = fork();
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+  if (child == 0) {
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+    execl(path, path, NULL);
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+    exit(EXIT_FAILURE);
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+  } else if (child > 0) {
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+    waitpid(child, NULL, 0);
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+  }
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+}
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+
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+int main() {
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+  run("/bin/ls");
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+  pid_t child = fork();
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+  if (child == 0) {
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+    run("/bin/uptime");
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+  } else if (child > 0) {
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+    waitpid(child, NULL, 0);
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+    run("/bin/hostname");
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+  }
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+  return EXIT_SUCCESS;
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+}
tests/fork/forkapp.pstree_ref
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+__UPT_HOME__/tests/fork/forkapp
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+  /bin/ls
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+  ???
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+    /bin/uptime
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+  /bin/hostname
tests/fork/forktest.bash
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@@ -0,0 +1,24 @@
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+#! /bin/bash
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+
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+set -eux -o pipefail
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+
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+if (( $# < 1 ))
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+then
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+  echo "usage: $0 <UPT_HOME>" >&2
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+  exit 2
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+fi
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+UPT_HOME="$1"
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+
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+SCRIPT_DIR="$(dirname "$0")"
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+
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+source "$UPT_HOME/exports"
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+
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+rm -rf forkapp.upt
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+
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+upt-trace forkapp.upt "$UPT_HOME/tests/fork/forkapp"
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+
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+upt-tool forkapp.upt pstree | tee forkapp.pstree
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+
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+sed -e "s%__UPT_HOME__%$UPT_HOME%" "$SCRIPT_DIR/forkapp.pstree_ref" \
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+  >forkapp.pstree_ref
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+diff -u forkapp.pstree forkapp.pstree_ref
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