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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include "trace.h"
#include "info.h"
#include "utils.h"
using namespace bundle;
// Global single-file bundle information, if any
const info_t* info_t::the_app = nullptr;
info_t::info_t(const pal::char_t* bundle_path,
const pal::char_t* app_path,
int64_t header_offset)
: m_bundle_path(bundle_path)
, m_bundle_size(0)
, m_header_offset(header_offset)
{
m_base_path = get_directory(m_bundle_path);
// Single-file bundles currently only support deps/runtime config json files
// named based on the app.dll. Any other name for these configuration files
// mentioned via the command line are assumed to be actual files on disk.
//
// Supporting custom names for these config files is straightforward (with associated changes in bundler and SDK).
// There is no known use-case for it yet, and the facility is TBD.
m_deps_json = config_t(get_deps_from_app_binary(m_base_path, app_path));
m_runtimeconfig_json = config_t(get_runtime_config_path(m_base_path, get_filename_without_ext(app_path)));
}
StatusCode info_t::process_bundle(const pal::char_t* bundle_path, const pal::char_t* app_path, int64_t header_offset)
{
if (header_offset == 0)
{
// Not a single-file bundle.
return StatusCode::Success;
}
static info_t info(bundle_path, app_path, header_offset);
StatusCode status = info.process_header();
if (status != StatusCode::Success)
{
return status;
}
trace::info(_X("Single-File bundle details:"));
trace::info(_X("DepsJson Offset:[%lx] Size[%lx]"), info.m_header.deps_json_location().offset, info.m_header.deps_json_location().size);
trace::info(_X("RuntimeConfigJson Offset:[%lx] Size[%lx]"), info.m_header.runtimeconfig_json_location().offset, info.m_header.runtimeconfig_json_location().size);
trace::info(_X(".net core 3 compatibility mode: [%s]"), info.m_header.is_netcoreapp3_compat_mode() ? _X("Yes") : _X("No"));
the_app = &info;
return StatusCode::Success;
}
StatusCode info_t::process_header()
{
try
{
const char* addr = map_bundle();
reader_t reader(addr, m_bundle_size, m_header_offset);
m_header = header_t::read(reader);
m_deps_json.set_location(&m_header.deps_json_location());
m_runtimeconfig_json.set_location(&m_header.runtimeconfig_json_location());
unmap_bundle(addr);
return StatusCode::Success;
}
catch (StatusCode e)
{
return e;
}
}
char* info_t::config_t::map(const pal::string_t& path, const location_t* &location)
{
assert(is_single_file_bundle());
const bundle::info_t* app = bundle::info_t::the_app;
if (app->m_deps_json.matches(path))
{
location = app->m_deps_json.m_location;
}
else if (app->m_runtimeconfig_json.matches(path))
{
location = app->m_runtimeconfig_json.m_location;
}
else
{
return nullptr;
}
// When necessary to map the deps.json or runtimeconfig.json files, we map the whole single-file bundle,
// and return the address at the appropriate offset.
// This is because:
// * The host is the only code that is currently running and trying to map the bundle.
// * Files can only be memory mapped at page-aligned offsets, and in whole page units.
// Therefore, mapping only portions of the bundle will involve align-down/round-up calculations, and associated offset adjustments.
// We choose the simpler approach of rounding to the whole file
// * There is no performance limitation due to a larger sized mapping, since we actually only read the pages with relevant contents.
// * Files that are too large to be mapped (ex: that exhaust 32-bit virtual address space) are not supported.
char* addr = (char*)pal::mmap_copy_on_write(app->m_bundle_path);
if (addr == nullptr)
{
trace::error(_X("Failure processing application bundle."));
trace::error(_X("Failed to map bundle file [%s]"), path.c_str());
}
trace::info(_X("Mapped bundle for [%s]"), path.c_str());
return addr + location->offset;
}
void info_t::config_t::unmap(const char* addr, const location_t* location)
{
// Adjust to the beginning of the bundle.
addr -= location->offset;
bundle::info_t::the_app->unmap_bundle(addr);
}
const char* info_t::map_bundle()
{
const void *addr = pal::mmap_read(m_bundle_path, &m_bundle_size);
if (addr == nullptr)
{
trace::error(_X("Failure processing application bundle."));
trace::error(_X("Couldn't memory map the bundle file for reading."));
throw StatusCode::BundleExtractionIOError;
}
trace::info(_X("Mapped application bundle"));
return (const char *)addr;
}
void info_t::unmap_bundle(const char* addr) const
{
if (!pal::munmap((void*)addr, m_bundle_size))
{
trace::warning(_X("Failed to unmap bundle after extraction."));
}
else
{
trace::info(_X("Unmapped application bundle"));
}
}
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