Add a simple test TestModuleAndSection.py to exercise some module/section-related APIs.

In particular, it iterates through the executable module's SBSections, looking for the
'__TEXT' section and further iterates on its subsections (of SBSection type, too).

llvm-svn: 140654

lldb/test/python_api/module_section/Makefile

@@ -0,0 +1,6 @@
+LEVEL = ../../make
+
+CXX_SOURCES := main.cpp
+MAKE_DSYM :=NO
+
+include $(LEVEL)/Makefile.rules

lldb/test/python_api/module_section/TestModuleAndSection.py

@@ -0,0 +1,54 @@
+"""
+Test some SBModule and SBSection APIs.
+"""
+
+import os, time
+import re
+import unittest2
+import lldb
+from lldbtest import *
+
+class ModuleAndSectionAPIsTestCase(TestBase):
+
+    mydir = os.path.join("python_api", "module_section")
+
+    @python_api_test
+    def test_module_and_section(self):
+        """Test module and section APIs."""
+        self.buildDefault()
+        self.module_and_section()
+
+    def module_and_section(self):
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+        self.assertTrue(target.GetNumModules() > 0)
+
+        # Hide stdout if not running with '-t' option.
+        if not self.TraceOn():
+            self.HideStdout()
+
+        print "Number of modules for the target: %d" % target.GetNumModules()
+        for module in target.module_iter():
+            print module
+
+        # Get the executable module at index 0.
+        exe_module = target.GetModuleAtIndex(0)
+
+        print "Exe module: %s" % repr(exe_module)
+        print "Number of sections: %d" % exe_module.GetNumSections()
+        INDENT = ' ' * 4
+        for sec in exe_module.section_iter():
+            print sec
+            if sec.GetName() == "__TEXT":
+                print INDENT + "Number of subsections: %d" % sec.GetNumSubSections()
+                for subsec in sec:
+                    print INDENT + repr(subsec)
+
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/python_api/module_section/main.cpp

@@ -0,0 +1,128 @@
+//===-- main.cpp ------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// C includes
+#include <pthread.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+pthread_t g_thread_1 = NULL;
+pthread_t g_thread_2 = NULL;
+pthread_t g_thread_3 = NULL;
+
+typedef enum {
+    eGet,
+    eAssign,
+    eClearBits
+} MaskAction;
+
+uint32_t mask_access (MaskAction action, uint32_t mask = 0);
+
+uint32_t
+mask_access (MaskAction action, uint32_t mask)
+{
+    static pthread_mutex_t g_mask_mutex = PTHREAD_MUTEX_INITIALIZER;
+    static uint32_t g_mask = 0;
+    ::pthread_mutex_lock (&g_mask_mutex);
+    switch (action)
+    {
+    case eGet:
+        break;
+
+    case eAssign:
+        g_mask |= mask;
+        break;
+
+    case eClearBits:
+        g_mask &= ~mask;
+        break;
+    }
+    uint32_t new_mask = g_mask;
+    ::pthread_mutex_unlock (&g_mask_mutex);
+    return new_mask;
+}
+
+void *
+thread_func (void *arg)
+{
+    uint32_t thread_index = *((uint32_t *)arg);
+    uint32_t thread_mask = (1u << (thread_index));
+    printf ("%s (thread index = %u) startng...\n", __FUNCTION__, thread_index);
+
+    while (mask_access(eGet) & thread_mask)
+    {
+        // random micro second sleep from zero to 3 seconds
+        int usec = ::rand() % 3000000;
+        printf ("%s (thread = %u) doing a usleep (%d)...\n", __FUNCTION__, thread_index, usec);
+        ::usleep (usec);
+        printf ("%s (thread = %u) after usleep ...\n", __FUNCTION__, thread_index); // Set break point at this line.
+    }
+    printf ("%s (thread index = %u) exiting...\n", __FUNCTION__, thread_index);
+    return NULL;
+}
+
+
+int main (int argc, char const *argv[])
+{
+    int err;
+    void *thread_result = NULL;
+    uint32_t thread_index_1 = 1;
+    uint32_t thread_index_2 = 2;
+    uint32_t thread_index_3 = 3;
+    uint32_t thread_mask_1 = (1u << thread_index_1);
+    uint32_t thread_mask_2 = (1u << thread_index_2);
+    uint32_t thread_mask_3 = (1u << thread_index_3);
+
+    // Make a mask that will keep all threads alive
+    mask_access (eAssign, thread_mask_1 | thread_mask_2 | thread_mask_3); // And that line.
+
+    // Create 3 threads
+    err = ::pthread_create (&g_thread_1, NULL, thread_func, &thread_index_1);
+    err = ::pthread_create (&g_thread_2, NULL, thread_func, &thread_index_2);
+    err = ::pthread_create (&g_thread_3, NULL, thread_func, &thread_index_3);
+
+    char line[64];
+    while (mask_access(eGet) != 0)
+    {
+        printf ("Enter thread index to kill or ENTER for all:\n");
+        fflush (stdout);
+        // Kill threads by index, or ENTER for all threads
+
+        if (fgets (line, sizeof(line), stdin))
+        {
+            if (line[0] == '\n' || line[0] == '\r' || line[0] == '\0')
+            {
+                printf ("Exiting all threads...\n");
+                break;
+            }
+            int32_t index = strtoul (line, NULL, 0);
+            switch (index)
+            {
+                case 1: mask_access (eClearBits, thread_mask_1); break;
+                case 2: mask_access (eClearBits, thread_mask_2); break;
+                case 3: mask_access (eClearBits, thread_mask_3); break;
+            }
+            continue;
+        }
+
+        break;
+    }
+
+    // Clear all thread bits to they all exit
+    mask_access (eClearBits, UINT32_MAX);
+
+    // Join all of our threads
+    err = ::pthread_join (g_thread_1, &thread_result);
+    err = ::pthread_join (g_thread_2, &thread_result);
+    err = ::pthread_join (g_thread_3, &thread_result);
+
+    return 0;
+}