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Add pid param to MapInfo::Scan #4

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merged 2 commits into from
Feb 25, 2024
Merged

Add pid param to MapInfo::Scan #4

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e606d59
Add pid param to MapInfo::Scan
vvb2060 Feb 25, 2024
7774a88
update deps
vvb2060 Feb 25, 2024
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3 changes: 2 additions & 1 deletion lsplt/src/main/jni/include/lsplt.hpp
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Expand Up @@ -37,8 +37,9 @@ struct MapInfo {

/// \brief Scans /proc/self/maps and returns a list of \ref MapInfo entries.
/// This is useful to find out the inode of the library to hook.
/// \param[in] pid The process id to scan. This is "self" by default.
/// \return A list of \ref MapInfo entries.
[[maybe_unused, gnu::visibility("default")]] static std::vector<MapInfo> Scan();
[[maybe_unused, gnu::visibility("default")]] static std::vector<MapInfo> Scan(std::string_view pid = "self");
};

/// \brief Register a hook to a function by inode. For so within an archive, you should use
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5 changes: 3 additions & 2 deletions lsplt/src/main/jni/lsplt.cc
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Expand Up @@ -242,11 +242,12 @@ HookInfos hook_info;

namespace lsplt {
inline namespace v2 {
[[maybe_unused]] std::vector<MapInfo> MapInfo::Scan() {
[[maybe_unused]] std::vector<MapInfo> MapInfo::Scan(std::string_view pid) {
constexpr static auto kPermLength = 5;
constexpr static auto kMapEntry = 7;
std::vector<MapInfo> info;
auto maps = std::unique_ptr<FILE, decltype(&fclose)>{fopen("/proc/self/maps", "r"), &fclose};
auto path = "/proc/" + std::string{pid} + "/maps";
auto maps = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "r"), &fclose};
if (maps) {
char *line = nullptr;
size_t len = 0;
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