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#include "WAVM/Logging/Logging.h"
#include <atomic>
#include "WAVM/Inline/Assert.h"
#include "WAVM/Inline/BasicTypes.h"
#include "WAVM/Inline/Config.h"
#include "WAVM/Platform/Defines.h"
#include "WAVM/Platform/File.h"
#include "WAVM/VFS/VFS.h"
using namespace WAVM;
using namespace WAVM::Log;
static std::atomic<bool> categoryEnabled[(Uptr)Category::num] = {
{true}, // error
{!!WAVM_DEBUG}, // debug
{false}, // metrics
{true}, // output
{false}, // trace validation
{false}, // trace compilation
};
static std::atomic<OutputFunction*> atomicOutputFunction{nullptr};
static VFS::VFD* getFileForCategory(Log::Category category)
{
return category == Log::error ? Platform::getStdFD(Platform::StdDevice::err)
: Platform::getStdFD(Platform::StdDevice::out);
}
void Log::setCategoryEnabled(Category category, bool enable)
{
WAVM_ASSERT(category < Category::num);
categoryEnabled[(Uptr)category].store(enable);
}
bool Log::isCategoryEnabled(Category category)
{
WAVM_ASSERT(category < Category::num);
return categoryEnabled[(Uptr)category].load();
}
void Log::printf(Category category, const char* format, ...)
{
if(categoryEnabled[(Uptr)category].load())
{
va_list argList;
va_start(argList, format);
vprintf(category, format, argList);
va_end(argList);
}
}
void Log::vprintf(Category category, const char* format, va_list argList)
{
if(categoryEnabled[(Uptr)category].load())
{
va_list argListCopy;
va_copy(argListCopy, argList);
const I32 numChars = vsnprintf(nullptr, 0, format, argListCopy);
WAVM_ASSERT(numChars >= 0);
const Uptr numBufferBytes = numChars + 1;
static constexpr Uptr maxAllocaBytes = 4096;
char* buffer = (char*)(numBufferBytes > maxAllocaBytes ? malloc(numBufferBytes)
: alloca(numBufferBytes));
vsnprintf(buffer, numBufferBytes, format, argList);
// If an output function is set, call it with the message.
OutputFunction* outputFunction = atomicOutputFunction.load(std::memory_order_acquire);
if(outputFunction) { (*outputFunction)(category, buffer, Uptr(numChars)); }
else
{
// Otherwise, write the message to the appropriate stdio device.
VFS::VFD* fd = getFileForCategory(category);
Uptr numBytesWritten = 0;
WAVM_ERROR_UNLESS(fd->write(buffer, numChars, &numBytesWritten)
== VFS::Result::success);
WAVM_ERROR_UNLESS(numBytesWritten == U32(numChars));
}
if(numBufferBytes > maxAllocaBytes) { free(buffer); }
}
}
void Log::setOutputFunction(OutputFunction* newOutputFunction)
{
atomicOutputFunction.store(newOutputFunction, std::memory_order_release);
}
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