Added std::string viewer.

icculus · Aug 7, 2008 · 42e33be · 42e33be
1 parent b7e2c11
commit 42e33be
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Showing 4 changed files with 78 additions and 0 deletions.
diff --git a/.hgignore b/.hgignore
@@ -3,3 +3,5 @@ build
 dataplugin_tests/*/*.so
 dataplugin_tests/hello/hello
 dataplugin_tests/wchar_t/wchar
+dataplugin_tests/std_str/stdstr
+
diff --git a/dataplugin_tests/std_str/Makefile b/dataplugin_tests/std_str/Makefile
@@ -0,0 +1,14 @@
+all: viewstdstr.so stdstr
+
+.PHONY: clean
+clean:
+	rm -f stdstr viewstdstr.so
+
+stdstr: stdstr.cpp
+	g++ -o stdstr -Wall -O0 -g stdstr.cpp
+
+viewstdstr.so: viewstdstr.cpp
+	g++ -o viewstdstr.so -shared -fPIC -Wall -O0 -g viewstdstr.cpp -I../../src/gdb
+
+# end of Makefile ...
+
diff --git a/dataplugin_tests/std_str/stdstr.cpp b/dataplugin_tests/std_str/stdstr.cpp
@@ -0,0 +1,12 @@
+#include <string>
+
+int main(void)
+{
+    std::string x("Hello, world!");
+    std::string y("blah blah blah");
+    return (strlen(x.c_str()) != strlen(y.c_str())) ? 0 : 1;
+}
+
+/* end of viewstdstr.cpp ... */
+
+
diff --git a/dataplugin_tests/std_str/viewstdstr.cpp b/dataplugin_tests/std_str/viewstdstr.cpp
@@ -0,0 +1,50 @@
+#include <string>
+#include <wchar.h>
+#include "gdb-dataplugins.h"
+
+static void view_std_string(const void *ptr, const GDB_dataplugin_funcs *funcs)
+{
+    char buf[sizeof (std::string)];  // we don't actually want to construct.
+
+    if (funcs->readmem(ptr, buf, sizeof (buf)) != 0)
+        return;
+
+    // the c_str() call only works if it doesn't want to touch anything we
+    //  haven't read from the target process, but it's easier than dealing
+    //  with private fields.
+    const std::string *stdstr = (const std::string *) buf;
+    char *cstr = (char *) funcs->readstr(stdstr->c_str(), sizeof (char));
+    if (cstr == 0)
+        return;
+
+    funcs->print("(const char *) \"%s\"\n", cstr);
+    funcs->freemem(cstr);
+}
+
+static void view_std_wstring(const void *ptr, const GDB_dataplugin_funcs *funcs)
+{
+    char buf[sizeof (std::wstring)];  // we don't actually want to construct.
+
+    if (funcs->readmem(ptr, buf, sizeof (buf)) != 0)
+        return;
+
+    const std::wstring *stdwstr = (const std::wstring *) buf;
+    wchar_t *wcstr = (wchar_t *) funcs->readstr(stdwstr->c_str(), sizeof (wchar_t));
+    if (wcstr == 0)
+        return;
+
+    funcs->print("(const wchar_t *) \"%ls\"\n", wcstr);
+    funcs->freemem(wcstr);
+}
+
+void GDB_DATAPLUGIN_ENTRY(const GDB_dataplugin_entry_funcs *funcs)
+{
+    funcs->register_viewer("std::string", view_std_string);
+    funcs->register_viewer("std::wstring", view_std_wstring);
+    funcs->register_viewer("string", view_std_string);
+    funcs->register_viewer("wstring", view_std_wstring);
+}
+
+/* end of viewstdstr.cpp ... */
+
+