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Improve diagram in malloc_heapprofd.

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Include the functions that cause the state transitions.

Change-Id: I262e74c58e12316996451c418ab222f4512d005c
This commit is contained in:
Florian Mayer 2020-06-26 14:27:58 +02:00
parent b76e8e610c
commit c618960288
1 changed files with 10 additions and 6 deletions
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16
libc/bionic/malloc_heapprofd.cpp
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@ -56,8 +56,8 @@
// +--->+-------------+------------------+
// | +->+kInitialState+----------------+ | malloc functions are not intercepted in any way.
// | | +-------+-----+ | |
// | | | | |
// | | v | |
// | | | HandleHeapprofd | |
// | | v Signal() | |
// | | +-------+----------------+ | | currently installing the ephemeral hooks.
// | | |kInstallingEphemeralHook|<--+ | |
// | | +-------+----------------+ | | |
@ -65,9 +65,9 @@
// | | v | | |
// | | +-------+---------------+ | | | ephemeral hooks are installed. on the first call to
// | | |kEphemeralHookInstalled| | | | malloc these hooks spawn a thread that installs the
// | | +-------+---------------+ | | | heapprofd hooks.
// | | | | | |
// | | v | | |
// | | +-------+---------------+ A B C heapprofd hooks.
// | | | MallocInit | | |
// | | v HeapprofdHook () | | |
// | | +-------+--------------+ | | | first call to malloc happened. the hooks are reset to
// | +--|kRemovingEphemeralHook| | | | kInitialState.
// | +----------------------+ | | |
@ -81,7 +81,7 @@
// | +-------+------+ | | heapprofd hooks are installed. these forward calls to
// | |kHookInstalled|-------------+ | malloc / free / etc. to heapprofd_client.so.
// | +-------+------+ |
// | | |
// | | DispatchReset() |
// | v |
// | +-------+---------+ | currently resetting the hooks to default.
// |----+kUninstallingHook| |
@ -92,6 +92,10 @@
// |kIncompatibleHooks+<------------+ precendence over heapprofd, so heapprofd will not get
// +------------------+ enabled. this is a terminal state.
//
//
// A) HandleHeapprofdSignal()
// B) HeapprofdInstallHooksAtInit() / InitHeapprofd()
// C) HeapprofdRememberHookConflict()
enum MallocHeapprofdState : uint8_t {
kInitialState,
kInstallingEphemeralHook,