Populate tree.

1 files changed, 117 insertions, 0 deletions

diff --git a/src/rt/rust_log.cpp b/src/rt/rust_log.cpp
new file mode 100644
index 00000000..102a2623
--- /dev/null
+++ b/src/rt/rust_log.cpp
@@ -0,0 +1,117 @@
+/*
+ * Logging infrastructure that aims to support multi-threading, indentation
+ * and ansi colors.
+ */
+
+#include "rust_internal.h"
+
+static uint32_t read_type_bit_mask() {
+    uint32_t bits = rust_log::ULOG | rust_log::ERR;
+    char *env_str = getenv("RUST_LOG");
+    if (env_str) {
+        bits = 0;
+        bits |= strstr(env_str, "err") ? rust_log::ERR : 0;
+        bits |= strstr(env_str, "mem") ? rust_log::MEM : 0;
+        bits |= strstr(env_str, "comm") ? rust_log::COMM : 0;
+        bits |= strstr(env_str, "task") ? rust_log::TASK : 0;
+        bits |= strstr(env_str, "up") ? rust_log::UPCALL : 0;
+        bits |= strstr(env_str, "dom") ? rust_log::DOM : 0;
+        bits |= strstr(env_str, "ulog") ? rust_log::ULOG : 0;
+        bits |= strstr(env_str, "trace") ? rust_log::TRACE : 0;
+        bits |= strstr(env_str, "dwarf") ? rust_log::DWARF : 0;
+        bits |= strstr(env_str, "cache") ? rust_log::CACHE : 0;
+        bits |= strstr(env_str, "timer") ? rust_log::TIMER : 0;
+        bits |= strstr(env_str, "all") ? rust_log::ALL : 0;
+    }
+    return bits;
+}
+
+rust_log::ansi_color rust_log::get_type_color(log_type type) {
+    switch (type) {
+    case ERR:
+        return rust_log::RED;
+    case UPCALL:
+        return rust_log::GREEN;
+    case COMM:
+        return rust_log::MAGENTA;
+    case DOM:
+    case TASK:
+        return rust_log::LIGHTTEAL;
+    case MEM:
+        return rust_log::YELLOW;
+    default:
+        return rust_log::WHITE;
+    }
+}
+
+static const char * _foreground_colors[] = { "[30m", "[1;30m", "[37m",
+                                             "[31m", "[1;31m", "[32m",
+                                             "[1;32m", "[33m", "[33m",
+                                             "[34m", "[1;34m", "[35m",
+                                             "[1;35m", "[36m", "[1;36m" };
+rust_log::rust_log(rust_srv *srv, rust_dom *dom) :
+    _srv(srv), _dom(dom), _type_bit_mask(read_type_bit_mask()),
+            _use_colors(getenv("RUST_COLOR_LOG")), _indent(0) {
+}
+
+rust_log::~rust_log() {
+
+}
+
+void rust_log::trace_ln(char *message) {
+    char buffer[512];
+    if (_use_colors) {
+        snprintf(buffer, sizeof(buffer), "\x1b%s0x%08" PRIxPTR "\x1b[0m: ",
+                 _foreground_colors[1 + ((uintptr_t) _dom % 2687 % (LIGHTTEAL
+                         - 1))], (uintptr_t) _dom);
+    } else {
+        snprintf(buffer, sizeof(buffer), "0x%08" PRIxPTR ": ",
+                 (uintptr_t) _dom);
+    }
+
+    for (uint32_t i = 0; i < _indent; i++) {
+        strncat(buffer, "\t", sizeof(buffer) - strlen(buffer) - 1);
+    }
+    strncat(buffer, message, sizeof(buffer) - strlen(buffer) - 1);
+    _srv->log(buffer);
+}
+
+/**
+ * Traces a log message if the specified logging type is not filtered.
+ */
+void rust_log::trace_ln(uint32_t type_bits, char *message) {
+    trace_ln(get_type_color((rust_log::log_type) type_bits), type_bits,
+             message);
+}
+
+/**
+ * Traces a log message using the specified ANSI color code.
+ */
+void rust_log::trace_ln(ansi_color color, uint32_t type_bits, char *message) {
+    if (is_tracing(type_bits)) {
+        if (_use_colors) {
+            char buffer[512];
+            snprintf(buffer, sizeof(buffer), "\x1b%s%s\x1b[0m",
+                     _foreground_colors[color], message);
+            trace_ln(buffer);
+        } else {
+            trace_ln(message);
+        }
+    }
+}
+
+bool rust_log::is_tracing(uint32_t type_bits) {
+    return type_bits & _type_bit_mask;
+}
+
+void rust_log::indent() {
+    _indent++;
+}
+
+void rust_log::outdent() {
+    _indent--;
+}
+
+void rust_log::reset_indent(uint32_t indent) {
+    _indent = indent;
+}