diff options
Diffstat (limited to 'tests/emscripten_log/emscripten_log.cpp')
| -rw-r--r-- | tests/emscripten_log/emscripten_log.cpp | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/tests/emscripten_log/emscripten_log.cpp b/tests/emscripten_log/emscripten_log.cpp new file mode 100644 index 00000000..a5bb8432 --- /dev/null +++ b/tests/emscripten_log/emscripten_log.cpp @@ -0,0 +1,136 @@ +#include <emscripten.h> +#include <stdio.h> +#include <cstring> + +#define STRINGIZE_HELPER(x) #x +#define STRINGIZE(x) STRINGIZE_HELPER(x) + +#ifndef REPORT_RESULT +#define REPORT_RESULT int dummy +#endif + +int result = 1; // If 1, this test succeeded. + +// A custom assert macro to test varargs routing to emscripten_log(). +#define MYASSERT(condition, ...) \ + do { \ + if (!(condition)) { \ + emscripten_log(EM_LOG_ERROR, "%s", "Condition '" #condition "' failed in file " __FILE__ ":" STRINGIZE(__LINE__) "!"); \ + emscripten_log(EM_LOG_ERROR, ##__VA_ARGS__); \ + result = 0; \ + } \ + } while(0) + +void __attribute__((noinline)) kitten() +{ + // Log to Emscripten Module. + emscripten_log(EM_LOG_NO_PATHS, "Print a log message: int: %d, string: %s.", 42, "hello"); + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_WARN, "Print a warning message"); + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_ERROR, "This is an error!"); + + // Log directly to Browser web inspector/console. + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_CONSOLE, "Info log to console: int: %d, string: %s", 42, "hello"); + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_CONSOLE | EM_LOG_WARN, "Warning message to console."); + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_CONSOLE | EM_LOG_ERROR, "Error message to console! This should appear in red!"); + + // Log to with full callstack information (both original C source and JS callstacks): + emscripten_log(EM_LOG_C_STACK | EM_LOG_JS_STACK | EM_LOG_DEMANGLE, "A message with as full call stack information as possible:"); + + // Log with just mangled JS callstacks: + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_JS_STACK, "This is a message with a mangled JS callstack:"); + + // Log only clean C callstack: + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_C_STACK | EM_LOG_DEMANGLE, "This message should have a clean C callstack:"); + + // We can leave out the message to just print out the callstack: + printf("The following line should show just the callstack without a message:\n"); + emscripten_log(EM_LOG_NO_PATHS | EM_LOG_ERROR | EM_LOG_C_STACK | EM_LOG_JS_STACK | EM_LOG_DEMANGLE); +} + +void __attribute__((noinline)) bar(int = 0, char * = 0, double = 0) // Arbitrary function signature to add some content to callstack. +{ + if (1 == 2) + MYASSERT(2 == 1, "World falls apart!"); + else + MYASSERT(1 == 1); + + int flags = EM_LOG_NO_PATHS | EM_LOG_JS_STACK | EM_LOG_DEMANGLE | EM_LOG_FUNC_PARAMS; +#ifndef RUN_FROM_JS_SHELL + flags |= EM_LOG_C_STACK; +#endif + + // We can programmatically get the callstack. + // 1. Ask for callstack length: + int nbytes = emscripten_get_callstack(flags, 0, 0); + // 2. Allocate temp memory to hold the callstack. + char *callstack = new char[nbytes]; + // 3. Obtain it. + // 4. Do something with the callstack string. + + emscripten_get_callstack(flags, callstack, nbytes); + + /* The callstack should be something like + at bar(int, char*, double) (src.cpp.o.js:5383:12) + at void Foo<int>() (src.cpp.o.js:5417:4) + at main() (src.cpp.o.js:5404:2) + at Object.callMain (src.cpp.o.js:71344:30) + at doRun (src.cpp.o.js:71383:25) + at run (src.cpp.o.js:71396:5) + at Object.<anonymous> (src.cpp.o.js:71439:1) + at Module._compile (module.js:456:26) + + but the line numbers will greatly vary depending on the mode we are compiling in, so cannot test with direct string comparison. */ + + if ((flags & EM_LOG_C_STACK) != 0) + { + MYASSERT(!!strstr(callstack, "at bar(int, char*, double) (src.cpp:"), "Callstack was %s!", callstack); + MYASSERT(!!strstr(callstack, "at void Foo<int>() (src.cpp:"), "Callstack was %s!", callstack); + } + else + { + MYASSERT(!!strstr(callstack, "at bar(int, char*, double) (src.cpp.o.js:"), "Callstack was %s!", callstack); + MYASSERT(!!strstr(callstack, "at void Foo<int>() (src.cpp.o.js:"), "Callstack was %s!", callstack); + } + + // 5. Clean up. + delete[] callstack; + + // Or alternatively use a fixed-size buffer for the callstack (and get a truncated output if it was too small). + char str[1024]; + emscripten_get_callstack(EM_LOG_NO_PATHS | EM_LOG_JS_STACK, str, 1024); + + /* With EM_LOG_JS_STACK, the callstack will be + at __Z3bariPcd (src.cpp.o.js:5394:12) + at __Z3FooIiEvv (src.cpp.o.js:5417:4) + at Object._main (src.cpp.o.js:5404:2) + at Object.callMain (src.cpp.o.js:71344:30) + at doRun (src.cpp.o.js:71383:25) + at run (src.cpp.o.js:71396:5) + at Object.<anonymous> (src.cpp.o.js:71439:1) + at Module._compile (module.js:456:26) */ +#ifdef RUN_FROM_JS_SHELL + MYASSERT(!!strstr(str, "at __Z3bariPcd (src.cpp"), "Callstack was %s!", str); + MYASSERT(!!strstr(str, "at __Z3FooIiEvv (src.cpp"), "Callstack was %s!", str); +#else + MYASSERT(!!strstr(str, "at __Z3bariPcd (page.js"), "Callstack was %s!", str); + MYASSERT(!!strstr(str, "at __Z3FooIiEvv (page.js"), "Callstack was %s!", str); +#endif +} + +template<typename T> +void __attribute__((noinline)) Foo() // Arbitrary function signature to add some content to callstack. +{ + bar(); +} + +int main() +{ + Foo<int>(); +#ifndef RUN_FROM_JS_SHELL + REPORT_RESULT(); + return 0; +#else + if (result) + printf("Success!\n"); +#endif +} |